Search Results — 2000 specimen records retrieved (1680 records with coordinates)
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Results for search: Collector=Roberts;   

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(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
 Records are made available under the CCH Data Use Terms.

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  UCSB50116  Abies magnifica Roberts, Fred 1981-5-10 Mono 0.8 km. W Mammoth Lakes on Minarette Summit Road; Sierra Nevada Mountains 2637 Comment
  RSA0126616  Acacia Fred M. Roberts 2012-4-27 7497 Orange San Joaquin Hills: Buck Gully, W of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km W Signal Peak. 179 Comment
  UCSB52938  Acacia cyanophylla F. M. Roberts, Jr. 1984-3-15 1260 Orange collected 1.0 km SSW and 3.0 km W, along Back Bay Drive in Newport Back Bay Bayview School and U. C. Irvine Campus Center - Newport Back Bay, Back Bay Drive, U. C. Irvine Campus Center 2 Comment
  SD245717  Acacia cyclops Jim Roberts 2013-7-1 40 San Diego City of San Diego; Tecolote Canyon Natural Park; Chateau Dr. entrance; trail west to third stream crossing, then north on trail toward North Clairemont Rec. Center about 190m; plant is east of trail 84 Comment
  UCSB57545  Acacia longifolia Roberts, Fred 1984-3-15 Orange Newport Beach; Newport Backbay, along Back Bay Dr., 3.0 km. W University of California, Irvine campus center 2 Comment
  IRVC22784  Acacia mearnsii Fred M. Roberts 1985-6-2 1839 Orange El Camino Real, 0.1km SE Beach Rd., Capistrano Beach 5 Comment
  UCSB57544  Acacia pycnantha Roberts, Fred 1984-6-2 Orange Capistrano Beach: El Camino Real, 0.1 km. SE Beach Rd., UTM 3701800mN, 438025mE 5 Comment
  UCR239623  Acacia redolens Fred M. Roberts 2012-4-24 7497 Orange San Joaquin Hills, Buck Gully, west of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km west of Signal Peak 179 Comment
  RSA0029936  Acacia retinodes Fred M. Roberts 2013-5-15 7774 Orange San Joaquin Hills: Buck Gully, north slope, along south side of San Joaquin Hills Drive, 1.6 km NNW summit Pelican Hill. 174 Comment
  RSA450873  Acacia saligna Fred M. Roberts 1984-3-15 1260 Orange Newport Beach; Upper Newport Back Bay, along Back Bay Drive, 3.0 km. W UC Irvine campus center; 1.0 km. SSW Bayview School. 2 Comment
  UCR246517  Acacia saligna Fred M. Roberts 2013-5-15 7774 Orange San Joaquin Hills, Buck Gully, north slope, along south side of San Joaquin Hills Drive, 1.6 km north northwest of the summit of Pelican Hill 174 Comment
  SEINET947570  Acacia trineura Warren G. Roberts 1975-1 s.n. Unknown U. C. Davis Arboretum Comment
  SBBG54776  Acer macrophyllum D. Roberts 1981-3-25 Santa Barbara 0.5 km E of east pine forest; 1.1 km SE of Chinese Harbor Comment
  UCR215282  Achillea millefolium Fred M. Roberts 2008-5-14 6969 Orange Lomas de Santiago, Loma Ridge, upper Bee Flat Canyon below Loma Ridge Road, 1.3 km north of Bee Peak and 5.4 km NW of Bolero Lookout. Irvine Ranch Conservancy 377 Comment
  IRVC24997  Achillea millefolium var. californica Fred M. Roberts, H. Camp & R. Fisher 1986-6-20 3020 Orange San Joaquin Freshwater Marsh, near Campus Dr., 1.7km NNW UC Irvine campus center, Irvine 2 Comment
  RSA588728  Achillea millefolium var. californica Fred M. Roberts 1990-5-7 4602 Orange Rancho Mission Viejo: Ridge S of Blind Canyon and E of Christianitos Canyon, TRW Lease Holding, 5.0 km NE Clemente Survey Marker 152 Comment
  RSA539341  Achnatherum coronatum Fred M. Roberts, Karlin G. Marsh 1989-3-7 4193 Orange Lomas de Santiago: Loma Ridge, Hicks Canyon, 2.3km W Bee Survey Mark., UTM 37 32 200mN, 4 32 900mE 165 Comment
  RSA542360  Achnatherum coronatum Fred M. Roberts 1988-4-8 3897 Orange Lomas de Santiago: Loma Ridge, Central Linestone Canyon, 4.1 kilometers NNW Bolero Lookout. 323 Comment
  RSA548854  Achnatherum coronatum Fred M. Roberts, G. A. Marsh 1986-5-16 2859 Orange Upper Lucas Canyon watershed, Sitton Peak Truck Trail, 3km WSW Sitton Peak 730 Comment
  RSA550602  Achnatherum coronatum Fred M. Roberts 1989-4-25 4311 Orange Santa Ana Mountains: East Rim of Blind Canyon 8.5 kilometers SW Sierra Peak, ca. 1.4 kilometer N Irvine Lake spilway., UTM Z11 37 40 100m N, 4 33 000m E 366 Comment
  RSA680929  Achnatherum diegoense Fred M. Roberts, Andy Pinolo, Kam Muri 2003-5-3 5703 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed., (32 deg 33'46N, 116 deg 47' 59W). 305 Comment
  SBBG55090  Achnatherum diegoense O. Roberts, L. Pierce 1982-3-23 Santa Barbara cyn 0.5 km WNW of Los Pinos del Sur 249 Comment
  SEINET4692114 Image available Achnatherum diegoense Fred M. Roberts 2001-1 5472 San Diego San Ysidro Mtns: NW foothills just E of Otay Lake, 0.5km E Savage Dam. (Otay Mesa) 215 Comment
  UCSB50330  Achnatherum diegoense Roberts, Dar; Pierce, L. 1982-3-23 Santa Barbara canyon, 0.5 km WNW of Los Pinos Del Sur, Santa Cruz Island. 249 Comment
  UCSB36128  Achnatherum hymenoides Roberts, Dar 1980-5-23 Kern at junction of CA Hwy 178 with CA Hwy 14. 975 Comment
  RSA599651  Achyrachaena mollis Fred M. Roberts 1995-4-21 4932 Orange Irvine: San Joaquin Hills, Quail Hill area near end of San Canyon Road, 2.5 km ENE French Hill. 52 Comment
  SD187926  Acmispon americanus var. americanus Laurie Roberts, Lane McClelland 2006-5-29 15 San Diego Descanso. NW base of Guatay peak, along Old Highway 80, just NE of its intersection with SR- 79. 1098 Comment
  UCSB47538  Acmispon argophyllus var. niveus Roberts, Fred 1982-5-10 Santa Barbara Santa Cruz Island; Canyon del Puerto, 3.0 km. NE Research Station; 1.8 km. NW Valley Peak 7 Comment
  RSA0127414  Acmispon glaber var. glaber Fred M. Roberts 2016-3-17 8009 Orange San Joaquin Hills: City of Irvine, Bommer Canyon, east fork, 0.3 km ESE Cattle Camp near East Fork Trail. 152 Comment
  SD164469  Acmispon glaber var. glaber Fred M. Roberts 2001-4-9 5407 San Diego Jamul Mtns.: SW slopes, NE of Upper Otay Lake, 5.4 km SE summit Mother Miguel Mtn. Otay Lakes North MSCP parcel. Knoll along ridge on mostly gentle SW-facing slope in rocky, open coastal sage scrub and annual grassland 309 Comment
  SD233837  Acmispon glaber var. glaber Fred M. Roberts, M. White, D. Flietner 2003-5-4 5810 San Diego Peninsular Range San Ysidro Mountains: Otay Mtn, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242 470 Comment
  UCR267188  Acmispon glaber var. glaber Fred M. Roberts 2010-3-12 7180 Orange Southeast Coast, DANA POINT HEADLANDS: Harbor Point Park, South of Green Lantern and west of Dana Point Harbor, c. 150 meters SE Interpretive Center 50 Comment
  SD242587  Acmispon grandiflorus var. grandiflorus Fred Roberts 2011-6-2 7440 San Diego Jamul; Lawson Peak: Lawson Truck Trail, 2.0 km SE Lawson Peak summit & about 0.75 km west of Lyons Valley Rd., Barrett Lake USGS 7.5min quad, UTM 11S 05 27 230mE, 36 19 699mN. 760 Comment
  UCSB52931  Acmispon micranthus Roberts, Jr., Fred 1983-5-19 Orange Laguna Beach: Sycamore Hills, near Laguna Canyon Rds.; 1.6 km. NNE jct. El Toro and Laguna Canyon Rds.; 5.1 km. ESE Signal Peak 130 Comment
  UCSB51644  Acmispon parviflorus Roberts, Fred 1984-3-22 Santa Barbara Santa Cruz Island; Upper Cuesta Valdez area, 2.6 km. WNW Diablo Peak; 0.5 km. NNE Bench Mark 1697 400 Comment
  SD233841  Acmispon strigosus Fred M. Roberts, M. White, D. Flietner 2003-5-4 5766 San Diego Peninsular Range San Ysidro Mountains: Otay Mtn, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242 427 Comment
  RSA0014075  Acourtia microcephala Fred M. Roberts 2008-5-27 7005 Orange Lomas de Santiago: Loma Ridge, Hicks Cyn., c.a. 0.2km beyond Hicks Cyn., Gate, 2.2km WNW Bee Peak, Irvine Ranch conservancy 213 Comment
  UCSB48009  Acourtia microcephala Roberts, Fred 1980-7-11 Orange Santa Ana Mtns.; San Juan Canyon, Hwy. 74, 2.4 km. ENE San Juan Guard Station; 0.3 km. W of Bench Mark 1100 345 Comment
  IRVC25000  Acroptilon repens Fred M. Roberts, Helen Camp & Bill Bretz 1986-6-20 3025 Orange San Joaquin Freshwater Marsh, near Campus Dr., 1.7km NNW UC Irvine campus center, Irvine 2 Comment
  RSA542407  Adenostoma fasciculatum var. fasciculatum Fred M. Roberts 1988-4-8 3895 Orange Lomas de Santiago: Loma Ridge, Central Linestone Canyon, 4.1 kilometers NNW Bolero Lookout. 323 Comment
  RSA588887  Adiantum capillus-veneris Fred M. Roberts 1990-6-4 4667 Orange Santa Ana Mts. Hall Canyon, 1.8 km NNW Mustand Spring at east edge of flying B Ranch. 421 Comment
  UCR215286  Adiantum jordanii Fred M. Roberts 2008-5-14 6960 Orange Lomas de Santiago, Loma Ridge, upper Bee Flat Canyon below Loma Ridge Road, 1.3 km north of Bee Peak and 5.4 km NW of Bolero Lookout. Irvine Ranch Conservancy 337 Comment
  SD148650  Adolphia californica Fred M. Roberts 2001-4-18 5433 San Diego Along Black Mountain Road, 0.5 km southeast Doug Survey Marker. 213 Comment
  SD148651  Adolphia californica Fred M. Roberts 2001-4-6 5398 San Diego La Zanja Canyon, 1.2 km southwest Doug Survey Marker, north of Carmel Valley Road. 121 Comment
  SD148652  Adolphia californica Fred M. Roberts 2001-4-27 5443 San Diego Ridge above Lusardi Creek below La Jolla Valley, ca. 2.1 km eastsoutheast confluence with San Dieguito River. 78 Comment
  SD164430  Adolphia californica Fred M. Roberts 2001-4-19 5437 San Diego Lusardi Creek MSCP parcel: Mesas north of Lusardi Creek, 1.2 km NE Low South Survey Marker. E-facing slope on a rocky clay lens dominated by native grassland and surrounded by coastal sage scrub. 91 Comment
  SD196629  Adolphia californica Fred Roberts 2007-4-6 6510 San Diego Carlsbad: La Costa Greens CNLM Preserve, east side of El Camino Real, c.a. 1.6 km S Palomar Airport Rd. 78 Comment
  RSA716088  Aeonium Fred M. Roberts 2006-7-27 6397 Orange San Joaquin Hills: Laguna Beach, Temple Hill, 731 Nyes Place, 1.0km NNE Golf Island. 174 Comment
Read comments
Dec 21 2019
  SD180752  Agave deserti var. deserti Fred Roberts, Carol A. Roberts 2005-6-14 6251 San Diego East of Jacumba Valley, along SR 94, 1.9km by road W jct. I-8, 2.4km SE Squaw Tit Peak and 1.7km S Mica Gem Mine. 964 Comment
  RSA679216  Agoseris grandiflora var. grandiflora Fred M. Roberts 2003-6-17 5917 Orange Just NE of Falcon roup Camp, 2.1km ESE Los Pinos Peak just west of main road. 1009 Comment
  RSA708526  Agoseris retrorsa Fred M. Roberts, Robert L. Allen, Chris Barnhill, Nancy Hatfield 2005-5-30 6238 Orange Modjeska Peak, north slope along summit road, c.a. 50 meters NNW, by air, summit. 1643 Comment
  UCSB48196  Agrostis exarata Roberts, Fred 1981-6-26 Orange Santa Ana Mtns; Viejo Canyon, 0.5 km N of CA Route 74, 2.7 km ENE of San Juan Guard Station 317 Comment
  RSA542331  Agrostis pallens Fred M. Roberts, K. Keane 1988-5-25 3996 Orange Rancho Mission Veijo: Lower Canada Chiquita, 2.0 kilometers SSE Medium Rancho Survey Marker., UTM 3710600m N, 443550m E. 91 Comment
  RSA773555  Agrostis pallens Fred M. Roberts 2008-6-3 7029 Orange Lomas de Santiago: Loma Ridge, East Fork Rattlesnake Canyon, ca. 2.6 km NE of Rattlesnake Reservoir spillway and 2.4 km ENE Bee Peak 235 Comment
  RSA788920  Agrostis pallens Fred M. Roberts 1999-6-10 5242 Orange Lomas de Santiago: Loma Ridge, Central Limestone Cyn., adjacent to the Sinks, 0.7 km E Bolero Spring and 1.9 km NW Bolero Lookout. 411 Comment
  UCR215278  Agrostis pallens Fred M. Roberts 2008-5-14 6968 Orange Lomas de Santiago, Loma Ridge, upper Bee Flat Canyon below Loma Ridge Road, 1.3 km north of Bee Peak and 5.4 km NW of Bolero Lookout. Irvine Ranch Conservancy 377 Comment
  RSA725516  Ailanthus altissima Fred M. Roberts, Robert L. Allen 2007-9-28 6614 Orange Silverado Cyn., along Silverado Cyn. Rd. at eastern edge of town of Silverado. 347 Comment
  UCR189302  Ailanthus altissima Fred M. Roberts, R. L. Allen 2007-9-28 6599 Orange Foothill Trabuco, Upper Aliso Creek at SE corner of El Toro Road and Valle Vista Way, c. 1.8 km NE Upper Oso Reservoir 308 Comment
  UCSB36156  Aira caryophyllea Roberts, Dar 1980-4-26 Monterey Hastings Natural History Preserve 167 Comment
  SD181829  Alisma triviale Fred Roberts, Rod Dossey 2005-5-31 6245 San Diego Miramar Marine Corps Air Station: along Kearny Villa Rd. between Kearny Villa Rd. and SR 163. 130 Comment
  UCR220087  Allium cratericola Fred M. Roberts, Carol A. Roberts 2009-5-2 6937 Ventura Transverse Ranges, Wagon Wheel Canyon, along Lockwood Valley Road, c. 6.3 km west of Mutau Flat Road 1493 Comment
  UCR215292  Allium haematochiton Fred M. Roberts, D. E. Bramlet 2008-5-13 6952 Orange Santa Ana Mountains, upper Weir Canyon, central fork, 3.5 km NE of Robbers Peak 369 Comment
  UCR209392  Allium marvinii Fred M. Roberts 2005-5-11 6183 San Bernardino San Bernardino Mountain foothills, tributary to Water Canyon, northeast of the junction of Water Canyon and Wildwood Canyon Roads 967 Comment
  IRVC28405  Allium peninsulare Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5720 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  IRVC28468  Allium praecox Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5816 San Diego Otay Mtn; head fo canyon ca. 2 milesNW of Otay Mtn Peak, ca. 0.5 mile WSW of peak 2242, S of peak 1517. Peninsular Ranges, San Ysidro Mountains 396 Comment
  RSA681018  Allium praecox Fred M. Roberts, David E. Bramlet 2003-3-7 5568 Orange Donna O Neill Land Conservancy; Ridge west of Christianitos Canyon, Middle Ridge Trail, 1.1km NW Gato Gate. 178 Comment
  SD164586  Allium praecox Fred M. Roberts 2001-3-19 5384 San Diego Proctor Valley, west slopes of Jamul Mountain, west of Upper Otay Lake, 4.5 km southeast [of] summit, Mother Miguel Mountain. Northwest-facing slope in open, grassy coastal sage scrub. 213 Comment
  RSA548870  Allium praecox Fred M. Roberts 1987-4-3 3342 Orange Irvine: San Joaquin Hills, Central Shadey Canyon, 2.8 kilometers NE Signal Hill. 103 Comment
  RSA581438  Alnus rhombifolia Fred M. Roberts, Gordon Marsh 1932-2-7 4357 Orange Santiago Canyon, Flemming Regional Park, just E of Modjeska at end of paved road, c.a. 3.0 km WSWLaurel Springs. 436 Comment
  RSA725522  Alnus rhombifolia Fred M. Roberts, Robert L. Allen 2007-9-28 6602 Orange Santa Ana Mtns.: Silverado Cyn., along Silverado Cyn. Rd. at eastern edge of town of Silverado. 347 Comment
  SBBG25318  Alnus rhombifolia W. Roberts 1963-4-10 20 Monterey watershed of Carmel River, E side of Cachagua Rd, ca. 9.3 mi from Tularcitos Rd, via Prince's Camp 243 Comment
  UCD110022  Alnus rhombifolia Warren Roberts 1963-4-10 20 Monterey Crown at water table, watershed of Carmel River, east side of Cachagua Road, 9.3 miles from Tularcitos Road via Prince's Camp. 243 Comment
  UCSB47987  Alnus rhombifolia Roberts, Jr., Fred 1980-6-25 Orange Santa Ana Mtns., San Juan Canyon below Calif. Rte. 74, 2.4 km. ENE San Juan Guard Station; 0.3 km. WSW BM 1100 290 Comment
  RSA737481  Aloe saponaria Fred M. Roberts 2008-3-12 6735 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, c.a. 0.8 km W Marine Institute (Dana Point Harbor). 50 Comment
  RSA731751  Amaranthus albus Fred M. Roberts 2007-11-9 6653 Orange San Juan Canyon along San Juan Creek, about 0.6 km E San Diego FWY. 24 Comment
  SD257996  Amaranthus albus Jim Roberts, B. Edwards, T. Robertson 2014-10-5 69 San Diego City of San Diego; Tecolote Canyon Natural Park; about 200m east of native garden and visitors center, N side of Tecolote Road 14 Comment
  RSA719405  Amaranthus blitoides Fred M. Roberts, Robert L. Allen 2006-10-8 6430 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 0.3km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  UCSB48240  Amaranthus blitoides Roberts, Fred 1981-7-21 Orange Rancho Mission Viejo; Calif. Rte. 74, 9.2 km. ENE San Juan Capistrano 100 Comment
  UCSB52950  Amaranthus blitoides Roberts, Fred 1983-9-26 Orange Santa Ana Mtns.; Lion Canyon, Chiquito Basin Trail, 3.6 km. NNE Lower San Juan Picnic Ground; 4.0 km SSE Los Pinos Peak 820 Comment
  IRVC24277  Amaranthus blitoides Fred M. Roberts, G. A. Marsh 1985-10-26 2522 Orange Santa Ana River: adjacent to Huntington Beach; 0.7km SSW Adams Street bridge. southern coastal 4 Comment
  UCSB48239  Amaranthus powellii Roberts, Fred 1981-7-8 Orange Rancho Mission Viejo; Calif. Rte. 74, 10.5 km. by road, ENE San Juan Capistrano 104 Comment
  RSA743511  Amblyopappus pusillus Fred M. Roberts 2008-4-9 6862 Orange Dana Point: Dana Point Headlands, CNLM Preserve near Outlook 2, 0.7 km W Marine Institute (Dana Point Harbor). 45 Comment
  UCR223966  Amblyopappus pusillus Fred M. Roberts 2008-4-9 6862 Orange South Coast, Dana Point, Dana Point Headlands, CNLM Preserve, near Outlook 2, 0.7 km west of Marine Institute, Dana Point Harbor 52 Comment
  UCSB48044  Ambrosia acanthicarpa Roberts, Fred 1981-9-26 Orange Anaheim Bay; Calif. Rte. 1 at southern margin of Naval Weapons Station, 1.7 km. SE McGaugh School; 1.1 km. W Hog Island 1 Comment
  IRVC22903  Ambrosia dumosa Fred M. Roberts, T. M. Burrows 1984-8-31 1403 Imperial S-2; 6.5km N by road of Ocotillo; ca. 18km SSW Carrizo Mtns. Sonoran desert 230 Comment
  SD253594  Ambrosia monogyra Jim Roberts 2014-2-20 58 San Diego City of San Diego; Navajo Canyon Open Space; near intersection of Alvarado Canyon Road and Adobe Falls Road 39 Comment
  RSA0042768  Ambrosia psilostachya Fred M. Roberts 2012-7-18 7679 Orange San Joaquin Hills: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus of Poppy Street and 2.1 km WNW summit of Pelican Hill. 37 Comment
  SD192214  Ambrosia psilostachya Fred Roberts, Carol A. Roberts 2006-10-15 6444 San Diego Miramar Marine Corps Air Station: Rose Cyn., south of Miramar Way between Schilt Rd. and Obregon Ave. 135 Comment
  IRVC21741  Ambrosia psilostachya var. californica Fred M. Roberts 1984-10-18 1429 Orange San Juan Canyon, 2.5km ENE San Juan Guard Station; 4.0km WNW Sitton Peak, Santa Ana Mountains 310 Comment
  RSA615546  Ambrosia pumila Fred M. Roberts 1997-6-29 5043 Riverside Warm Springs Valley: Nichols Road, 0.3 km by road W jct. I-15 near head of Walker Canyon, ca 2.8 km NW Lake Elsinore. 117 Comment
  UCR281019  Ambrosia salsola var. salsola Fred M. Roberts 2016-3-5 7998 Riverside Sonoran (Colorado) Desert, Little Maria Mountains: shallow canyon at west end, 4.3 km east of Palen Pass and 2.0 km WNW Peak "602" 116 Comment
  UCR189542  Ammannia coccinea Fred M. Roberts, S. Leatherman 2007-9-19 6579 Riverside Santa Ana Canyon, Santa Ana River, across from Green River Golf Course, 0.15 km W of Green River Road bridge 128 Comment
  UCR267219  Ammannia coccinea Fred M. Roberts, Sandra L. Leatherman 2008-9-3 7083 Orange Santa Ana River Canyon, YORBA LINDA: Santa Ana River, 0.7 km W Gypsum Canyon bridge, south of La Palma Ave. 107 Comment
  SD227923 Image available Amorpha californica Jim Roberts 2013-4-17 2 San Diego City of San Diego; Tecolote Canyon Natural Park; on trail from entrance 0.20 miles S of Marlesta Dr. on W side of Genesee Ave., about 20m S of first stream crossing on west side of service road 64 Comment
  RSA703704  Amorpha fruticosa Fred M. Roberts, David E. Bramlet 2004-7-30 6090 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy Cristianitos Canyon, along Cristianitos Ck., 0.93 km SSW Gato Gate and 0.23 km W Cristianitos Road. 76 Comment
  RSA725474  Amorpha fruticosa Fred M. Roberts, Megan Lulow 2007-7-30 6544 Orange Fremont Canyon, 1.3 km NE Irvine Lake spillway, North Irvine Ranch Policy Area. 253 Comment
  UCSB53363  Amphiscirpus nevadensis Roberts, Dar; Forbes, Holly 1983-7-22 Mono SE of Pister's Pond (pupfish refuge), 50m south of pond on west edge of drainage. NW end of slough, within fenced area Comment
  IRVC29087  Amsinckia intermedia Fred M. Roberts 1989-3-17 4202 Orange Aliso Canyon, 3.3km SSE Moulton Pk. Aliso-Wood Canyon Regional Park 30 Comment
  RSA0127413  Amsinckia intermedia Fred M. Roberts 2016-3-17 8008 Orange San Joaquin Hills: City of Irvine, Bommer Canyon, east fork, 0.3 km ESE Cattle Camp near East Fork Trail. 152 Comment
  SBBG55120  Amsinckia intermedia D. Roberts 1982-3-24 Santa Barbara 1.9 km SW of Devil's Pk on rd to Lagunitas Secas from Centinela Grade top 445 Comment
  UCSB43426  Amsinckia intermedia Roberts, Dar 1982-3-24 Santa Barbara 1.9 km SW of Devil's Peak on road to Lagunitas Secas from Centinella Grade top; Santa Cruz Island 445 Comment
  IRVC29097  Amsinckia menziesii Fred M. Roberts 1989-3-17 4212 Orange Aliso Canyon, 3.3km SSE Moulton Pk. Aliso-Wood Canyon Regional Park 30 Comment
  IRVC22198  Amsinckia menziesii var. intermedia Fred M. Roberts 1985-4-8 1636 Orange San Joaquin Hills, Turtle Rock area, hill 1.1km SE French Hill, Irvine 196 Comment
  RSA688982  Anagallis arvensis Fred M. Roberts, D. E. Bramlet 2003-4-10 5640 Orange Rancho Mission Viejo: Donna O'Neill Land conservancy, Back Road, ridge between Cristianitos Cyn, and Segunda Deshecha Canada, 1.45km WNW Gato Gate. 216 Comment
  RSA678734  Anagallis arvensis Fred M. Roberts, Carol A. Roberts, Robert Allen 2003-5-11 5861 Orange Dana Point Headlands: hilltop, 0.6km SSW Richard Henry Dana School south of Pacific Coast Highway and north of Scenic Drive. 73 Comment
  RSA0042764  Anemopsis californica Fred Roberts 2012-7-18 7671 Orange San Joaquin Hills: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus of Poppy Street and 2.1 km WNW summit of Pelican Hill. 37 Comment
  SEINET3990884  Angelica lineariloba J. Robertson, Y. Robertson 1979-7-19 s.n. Mono Sweetwater Mts., Frying Pan Canyon, Star City Rd., road fork at beginning of jeep trail 2316 Comment
  RSA716663  Anisodontea scabrosa Fred M. Roberts, Amber Oneal 2004-8-18 6097 Orange San Juan Capistrno: Ortega Ranch Business Center site, between Rancho Viejo Rd. and I-5 freeway adjacent to Horno Creek; 0.6km NE Mission San Juan Capistrano. 54 Comment
  IRVC21319  Anthemis cotula Fred M. Roberts 1982-7-31 788 Orange 0.3km NNW Clemente Survey Mark; 1.2km NNE Civiv Center, San Clemente 220 Comment
  RSA542472  Anthemis cotula Fred M. Roberts 1988-4-14 3926 Orange IRVINE: south of the San Diego Freeway, 1.2 km. ENE French Hill. 41 Comment
  RSA539362  Antirrhinum coulterianum Fred M. Roberts, Carol A. Roberts 1988-6-9 4075 Orange Santa Ana Mountains: Main Divide Truck Trail, saddle between Modjeska Peak and Santiago Pk., 0.5 km Ee summit of Modjeska Pk. 1445 Comment
  RSA594824  Antirrhinum kelloggii Fred M. Roberts, Sandra Leatherman, Brian Leatherman 1994-4-24 4918 Orange Santa Ana Mountains: San Juan Canyon, south side of CA route 74, 1 kilometers NNW San Juan Survey Mark. 268 Comment
  RSA680927  Antirrhinum nuttallianum Fred M. Roberts, Andy Pinolo, Kam Muri 2003-5-3 5701 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed. 305 Comment
  UCR128517  Antirrhinum nuttallianum Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5701 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed 305 Comment
  RSA542506  Antirrhinum nuttallianum subsp. nuttallianum Fred M. Roberts 1987-4-28 3393 Orange IRVINE: San Joanuin Hills, lateral to Upper Sand CAnyon, 2.3 km SE French Hill. 107 Comment
  RSA584718  Antirrhinum nuttallianum subsp. nuttallianum Fred M. Roberts 1989-5-18 4368 Orange Santa Ana Mountains: Upper Gypsum canyon, above ridge road, ca. 6.4 km WSW Sierra Peak. 415 Comment
  RSA588656  Antirrhinum nuttallianum subsp. nuttallianum Fred M. Roberts, Carol A. Roberts 1990-5-23 4651 Orange Santa Ana Mtns: West Fork, Upper Long Canyon, near Main Divide Truck Trail, 4.5 km SE Los Pinos Peak. 756 Comment
  RSA743494  Antirrhinum nuttallianum subsp. subsessile Fred M. Roberts 2008-3-19 6784 Orange Dana Point: Dana Point Headlands, CNLM Preserve, 0.8km W Marine Institute, Dana Point Harbor. 45 Comment
  SD233985  Antirrhinum nuttallianum subsp. subsessile Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5763 San Diego Peninsula Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi WSW of peak 2242. 427 Comment
  IRVC20471  Apiastrum angustifolium Fred M. Roberts 1983-5-4 1023 Orange Temple Hill, Upper Rancho Laguna Canyon, 1.7km SSW Top of the World Sch.; 1.4km ENE Cactus Point, Laguna Beach 200 Comment
  SD233719  Apiastrum angustifolium Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5724 San Diego Peninsular Range, San Ysidro mtns.: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed. Canyon bottom along stream course. 167 Comment
  UCSB56684  Apiastrum angustifolium Roberts, Fred 1983-2-25 Orange Laguna Beach; Goff Ridge, south flank of Temple Hill, 0.9 km. NNE Goff Island 180 Comment
  RSA450848  Apiastrum angustifolium Fred M. Roberts 1983-5-4 1023 Orange Laguna Beach: Upper Rancho Laguna canyon, 1.7km SSW Top of the World Sch.; 1.4km ENE Cactus Point 200 Comment
  SEINET5340455  Arabis lignifera J. Robertson, Y. Robertson 1979-6-20 s.n. Mono Masonic Hills across road from sign "Masonic Upper Town". 2469 Comment
  SEINET5340629  Arabis platysperma var. platysperma J. Robertson, Y. Robertson 1979-7-19 s.n. Mono Windswept ridge. 3048 Comment
  CHSC83110  Arctostaphylos densiflora Warren Roberts 1967-1-29 Monterey End of El Caminito. Carmel Valley. Comment
  SD237853  Arctostaphylos glandulosa subsp. crassifolia Fred Roberts, Jessica Vinje 2007-10-31 6632 San Diego Encinitas: Manchester CNLM Preserve, near NE gate, 2.0 km ESE Oakcrest Park [Encinitas Quad: UTM 11S 04 76 902mE, 36 55 248mN]. 68 Comment
  SD198409  Arctostaphylos glandulosa subsp. glandulosa Laurie Roberts, Lane McClelland 2006-5-2 7 San Diego Descanso. Just N of I-8, ca. 1 1/3 mi E of its intersection with SR-79. 1098 Comment
  SD237859  Arctostaphylos glandulosa subsp. glandulosa Fred Roberts, Michelle Balk 2008-2-29 6710 San Diego Del Mar: Crest Canyon Preserve, just west of Durango Dr., 0.3 km NNW intersection of Durango Dr. and Del Mar Heights Rd. [Del Mar Quad: UTM 11S 04 76 264mE, 36 45 886mN]. 111 Comment
  CAS-BOT-BC24747  Arctostaphylos glandulosa subsp. glandulosa E. E. Roberts 1948-5-1 s.n. Santa Barbara 20 mi. e. of Santa Maria, near n. fork of La Brea Creek. 914 Comment
  UCR171803  Arctostaphylos glauca Fred M. Roberts, F. T. Sproul 2001-6-8 5491 San Diego Gonzales Canyon, Ridge just N of Torrey Highlands Park, c.a. 0.8km NNE Torrey Pines High School. (Del Mar) 79 Comment
  UCD51556  Arctostaphylos insularis Warren Roberts 1973-9-19 Santa Barbara Santa Cruz Island. Comment
  SFV8793  Arctostaphylos manzanita E. Roberts 1964-3-25 17 Mendocino West of Indian Creek, 0.5 miles south of Philo. Comment
  UCD51962  Arctostaphylos manzanita Warren Roberts 1967-9-25 Siskiyou Near Somes Bar. Comment
  UCD51964  Arctostaphylos manzanita Warren Roberts 1967-9-25 Siskiyou Near Somes Bar. Comment
  UCD51974  Arctostaphylos manzanita Warren Roberts 1967-9-25 Siskiyou Near Somes Bar. Comment
  UCR209395  Arctostaphylos rainbowensis Fred M. Roberts 2007-4-13 6514 Riverside Santa Ana Mountains, vicinity of Santa Rosa Plateau, Carancho Road, 0.2 km west of the junction with Camaron Road, 1.3 km wet of the summit of Mesa de La Punta 360 Comment
  UCR209396  Arctostaphylos rainbowensis Fred M. Roberts 2007-4-13 6515 Riverside Santa Ana Mountains, south of Mesa de Colorado on the Santa Rosa Plateau, northwest corner of El Calamar Road and Via Escalon, 1.6 km west-northwest of the summit of Mesa de La Punta 536 Comment
  UCR209397  Arctostaphylos rainbowensis Fred M. Roberts 2007-4-13 6516 Riverside Santa Ana Mountains, south of Mesa de Colorado on the Santa Rosa Plateau, north side of El Calamar Road and Via Escalon, 0.8 km west-northwest of the summit of Mesa de La Punta 447 Comment
  CAS-BOT-BC43813  Arctostaphylos stanfordiana Robin Roberts 1983-4-3 88 Mendocino Mendocino, Maplecreek Bdg and Hwy 28. 400 Comment
  RSA766879  Arctostaphylos viridissima Fred M. Roberts, Holly Forbes, Bruce Orr 1982-2-13 444 Santa Barbara 0.5 miles west of road along ridge, Point Sal State Beach 335 Comment
  RSA539357  Argemone munita subsp. robusta Fred M. Roberts 1988-6-10 4101 Orange Santa Ana Mountains: Modjeska Peak, 0.4 km WSW summit. 1621 Comment
  RSA719415  Argyranthemum foeniculaceum Fred M. Roberts, Lee Ann Caranza 2006-10-25 6451 Orange Dana Point Headlands south of Margarite Drive, 0.6km W Marine Institute and 1km SW Cook Sch. 58 Comment
  RSA752035  Argyranthemum foeniculaceum Fred M. Roberts 2008-3-27 6814 Orange Dana Point: Dana Point Headlands, CNLM Preserve near Outlook 1, 0.5km W Marine Institute (Dana Point Harbor). 45 Comment
  RSA542374  Aristida adscensionis Fred M. Roberts 1988-4-8 3893 Orange Lomas de Santiago: Loma Ridge, Central Linestone Canyon, 4.1 kilometers NNW Bolero Lookout. 323 Comment
  RSA542514  Aristida adscensionis Fred M. Roberts 1987-3-31 3321 Orange Lomas de Santiago: Lomas [Loma] Ridge, upper Serrano Canyon, east fork, reservoir, 2.7 kilometers SE Bolero Lookout, UTM 3727900m N, 441800m E. 424 Comment
  RSA588884  Aristida adscensionis Fred M. Roberts, D. Bontrager 1990-6-5 4670 Orange Rancho Mission Viejo: Uper Gabino Canyon, near Orange County line, 3.9 kilometers E Point Ranch Survey Marker; UTM Z11 37 10 300m N, 4 52 100m E. 280 Comment
  UCR215299  Aristida adscensionis Fred M. Roberts 2008-4-24 6929 Orange Lomas de Santiago, Loma Ridge, lower Hicks Canyon 350 m east of Haul Rd., 1.9 km east of Rattlesnake Cyn. Reservoir dam and 2.1 km west of Bee Peak, Irvine Ranch Conservancy 180 Comment
  UCSB51646  Aristida divaricata Roberts, Fred 1984-3-21 Santa Barbara Santa Cruz Island; ridge NE of Coches Prietos along road; 2.0 km SSE of Field Station Comment
  RSA749350  Aristida purpurea Fred M. Roberts 2008-4-22 6923 Orange Lomas de Santiago: Loma Ridge, Lower Hicks Cyn.,along Haul Rd. near asphalt plant, 2.2 km ENE Rattlesnake Reservoir dam and 2.2 km WNW Bee Peak, Irvine Ranch Conservancy. 188 Comment
  RSA588773  Aristida purpurea var. parishii Fred M. Roberts, Carol A. Roberts, D. Bontrager 1990-4-28 4590 Orange Rancho Mission Viejo: Christianitos Canyon, 4.0 kilometers E Playa Survey Marker; UTM Z11 37 06 600m N, 4 47 600m E. 174 Comment
  UCSB52874  Aristida purpurea var. parishii Roberts, Fred 1983-4-16 Orange Laguna Beach, Sycamore Hills, central ridge; 1.4 km NNE jct of El Toro and Laguna Cyn Rds; 5.4 km ESE Signal Peak 117 Comment
  RSA588885  Aristida purpurea var. purpurea Fred M. Roberts, D. Bontrager 1990-6-5 4669 Orange Rancho Mission Viejo: Uper Gabino Canyon, near Orange County line, 3.9 kilometers E Point Ranch Survey Marker., UTM Z11 37 10 300m N, 4 52 100m E. 280 Comment
  RSA0013969  Aristida ternipes var. hamulosa Fred M. Roberts 2008-4-22 7167 Orange Lomas de Santiago: Loma Ridge, Lower Hicks Cyn., along Haul Road near asphalt plant, 2.2km ENE Rattlesnake Reservoir dam and 2.2km WNW Bee Peak, Irvine Ranch Conservancy 188 Comment
  UCR209341  Aristida ternipes var. hamulosa Fred M. Roberts 2008-4-22 7167 Orange Lomas de Santiago, Loma Ridge, Lower Hicks Canyon, along Haul Road near asphalt plant, 2.2 km east-northeast of Rattlesnake Reservoir Dam and 2.2 km west-northwest of Bee Peak, Irvine Ranch Conservancy 188 Comment
  RSA610243  Aristida ternipes var. hamulosa Fred M. Roberts, Tony Bomkamp 1997-3-19 4986 San Diego Rancho Mission Viejo: Canada Gobernadora, east slope, 2 kilometers SSE Median Rancho Survey Mark, 1.8 kilometer N CA Rte. 74, 104 Comment
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Mar 5 2009
  RSA0044743  Artemisia californica Fred M. Roberts, Arthur Davenport 2003-9-11 6018 Orange Rancho Mission Viego: Donna O'Neill Land Conservancy, Cristianitos Cyn., 85m SSW Sycamore Gate, 35m W of Cristianitos Road. 119 Comment
  SD192217  Artemisia californica Fred Roberts 2006-7-6 6363 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  IRVC25177  Artemisia douglasiana Fred M. Roberts, Brenda Fugle 1986-10-1 3156 Orange Laguna Hills; creek channel along Cabot Rd. ca. 1.0km N Pacific Park Pkwy. Southern Coastal 99 Comment
  IRVC3140  Artemisia douglasiana Fred M. Roberts 1986-9-3 3140 Orange adjacent to Anaheim, between Yorba Linda Regional Park and Imperial Hwy, Santa Ana River 88 Comment
  RSA703143  Artemisia douglasiana Fred M. Roberts, Arthur Davenport 2003-9-11 6012 Orange Rancho Mission Viejo; Donna O'neill Land Conservancy, Cristianitos Cyn., 0.79 km N of Sycamore Gate, 0.23 km W of Christianitos Road. 126 Comment
  IRVC21190  Artemisia douglasiana Fred M. Roberts 1984-8-11 1375 San Bernardino Lake Arrowhead; N shore; Winter Harbor off N Shore Dr. San Bernardino Mountains 1505 Comment
  SEINET7153155 Image available Artemisia ludoviciana subsp. incompta J. Robertson, Y. Robertson 1979-7-18 s.n. Mono Narrow, rocky, dry canyon near trail crossing 2743 Comment
  UCR247920  Artemisia palmeri Fred M. Roberts 2012-7-18 7669 Orange SAN JOAQUIN HILLS: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus of Poppy Street and 2.1 km WNW summit of Pelican Hill 37 Comment
  CAS-BOT-BC97251  Artemisia tridentata Robertson 1974-6-24 NW 114 -74 Mono 17 mi. East of Hwy. 395 on Cal. 120; Road to Benton; 25 mi. from Benton 2316 Comment
  SEINET7239503 Image available Artemisia tridentata subsp. wyomingensis J. H. Robertson 1974-6-25 NW 117 -74 Mono 2 miles east of Benton, on dump road 1792 Comment
  RSA788913  Arundo donax Fred M. Roberts 2008-9-17 7099 Orange Peninsular Ranges: Yorba Linda: Santa Ana River Canyon, Santa Ana River, 0.7 km W Gypsum Cyn. Rd. bridge, south of La Palma Ave. 107 Comment
  RSA542588  Asclepias eriocarpa Fred M. Roberts, K. Keane 1988-5-25 3998 Orange Rancho Mission Viejo: Lower Canada Chiquita, 1.9km SSE Medium Rancho Survey Mark, UTM 3710800m N, 443500m E 90 Comment
  RSA788899  Asclepias fascicularis Fred M. Roberts 2008-6-12 7041 Orange Lomas de Santiago: Loma Ridge, Shoestring Canyon, Shoestring Road near jct. with Santiago Cyn. Rd. 251 Comment
  UCR233746  Asclepias fascicularis Fred M. Roberts 2008-6-12 7041 Orange Santa Ana Mtns. Foothills, Lomas de Santiago; Loma Ridge, Shoestring Canyon, Shoestring Road near jct. with Santiago Cyn. Rd. 251 Comment
  UCSB53291  Asclepias speciosa Roberts, Dar 1983-7-22 Mono SE of Pister's Pond (pupfish refuge) at NW end of slough, within fenced area; Fish Slough; a desert wetland system 4.5 mi. north of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis 1341 Comment
  SD192108  Asparagus asparagoides Fred Roberts 2006-7-6 6353 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  IRVC28476  Aspidotis californica Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5808 San Diego Otay Mtn; head of cyn 2 miles NW of Otay Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 470 Comment
  SD233635  Aspidotis californica Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5742 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed. 167 Comment
  SD233636  Aspidotis californica Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5808 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mtn. peak, ca. 0.4 mi. WSW of peak 2242. 470 Comment
  UCR128870  Aspidotis californica Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5808 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 470 Comment
  IRVC20218  Aspidotis californica Fred M. Roberts 1982-9-29 817 Orange Niguel Hill, 2.1km NE Aliso Peak; 1.0km WSW Alicia Fire Sta., Laguna Niguel 249 Comment
  UCSB52883  Asplenium vespertinum Roberts, Fred; Allen, R. 1983-4-10 Orange Santa Ana Mtns; Upper Hot Springs Canyon, 2.3 km SW Falcon Group Camp; 1.9 km S Los Pinos Peak. 852 Comment
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Feb 26 2013
  SBBG60643  Aster G. Robertson -Aug-1903 Unknown Sierra San Pedro Martir 2286 Comment
  RSA594815  Aster radulinus Fred M. Roberts, Steve Boyd 1992-10-14 4852 Orange Santa Ana Mts.: ridge south of Mabey Canyon, just north of Skyline Drive near Orange County line, 2.7 km southeast of Sierra Peak 820 Comment
  IRVC20503  Aster subulatus var. ligulatus Fred M. Roberts 1983-9-29 1137 Orange San Joaquin Freshwater Marsh, 1.9km NNW UCI campus center, Irvine 2 Comment
  RSA715694  Aster subulatus var. ligulatus Fred M. Roberts, Chris M. Barnhill 2005-9-27 6275 A Orange San Juan Capistrano: San Juan Creek wash, east of La Novia Road bridge, 1.4km E Mission San Juan Capistrano, 27 Comment
  IRVC24275  Aster subulatus var. ligulatus Fred M. Roberts, G. A. Marsh 1985-10-26 2525 Orange Santa Ana River: adjacent to Huntington Beach; 0.7km SSW Adams Street bridge. southern coastal 4 Comment
  UCR123328  Astragalus bicristatus Fred M. Roberts 2001-7-5 5512 San Bernardino San Bernardino Mtns, White Mtn.Ridge, c. 0.4 km WSW of the summit of White Mtn. Peak and 0.9 km NNW of South Peak, west of Forest Service Road 3N17 2299 Comment
  SEINET8075551  Astragalus curtipes Maria Roberts, Antonia Mata; Chris Ross; Aaron Schmidt 2014-5-20 1 San Luis Obispo Southern slope of South Hill Open Space, west of the trail, San Luis Obispso.; 0 88 Comment
  SD242590  Astragalus deanei Fred Roberts, Carol A. Roberts 2010-3-14 7186 San Diego Dehesa: Jamacha Valley, along Glen Willow Rd., 0.15km S jct. with Camino de las Piedras Rd., on west side, about 7.4 km WNW Sequan Peak. El Cajon USGS 7.5min quad. 131 Comment
  RSA0127344  Astragalus didymocarpus var. didymocarpus Fred M. Roberts 2016-4-29 8047 Orange Lomas de Santiago: north of Santiago Canyon Road, southwest slope of hill marked 1332 on topo maps, just west of Irvine Lake, 1.6 km S Irvine Lake dam spillway and 0.8 km NW Irvine Lake Park. 335 Comment
  UCR209362  Astragalus didymocarpus var. didymocarpus Fred M. Roberts, D. E. Bramlet 2008-4-1 6836 Orange Lomas de Santiago, Loma Ridge, East Lomas Ridge Road along crest, 3.2 km northwest of Bee Peak and 3.4 km northeast of Rattlesnake Reservoir Dam, Irvine Ranch Conservancy 388 Comment
  SD198452  Astragalus douglasii var. parishii Fred Roberts, Debra Kinsinger 2007-6-14 6527 San Diego Guatay, S of Wild Pigeon Flat, 300 m N of Old Hwy 80, dirt road, 3.3 km NE Guatay Peak. 1252 Comment
  RSA749305  Astragalus gambelianus Fred M. Roberts 1999-4-21 5178 Orange Lomas de Santiago: Loma Ridge, ridges north of Dripping Springs Cyn., 1.5 km W Silverado Sch. and 4.8 km NNW Bolero Lookout. 365 Comment
  CAS-BOT-BC177981  Astragalus nuttallii var. nuttallii Robert Robertson 1954-5-8 147 Monterey Dunes E of Carmel Cove, Point Lobos 6 Comment
  IRVC22732  Astragalus trichopodus var. lonchus Fred M. Roberts 1985-5-13 1789 Orange South Laguna; Mouth of Aliso Canyon, 0.6km NW Aliso Peak, 6 Comment
  UCSB38442  Astragalus trichopodus var. lonchus Roberts, Fred; Fletcher, Martin 1981-3-24 Santa Barbara At Frazier Point, Santa Cruz Island 9 Comment
  RSA749468  Athysanus pusillus Fred M. Roberts 1999-4-22 5188 Orange Lomas de Santiago: tributary to Santiago Creek wash along spur road on ridge between Limestone Cyn. and Santiago Creek wash opposite Williams Cyn., 1.8 km SE Silverado Sch. and 2.3 km NNW Bolero Lookout. 396 Comment
  RSA588770  Athysanus pusillus Fred M. Roberts, Carol A. Roberts, Dave Bramlet 1990-5-6 4594 Orange Santa Ana Mnts.: Chiquito Basin, San Juan Trail, c.a. 2.5 km SSE Los Pinos Peak. 915 Comment
  UCSB36868  Athysanus pusillus Roberts, Fred; Fenwick, J. 1980-3-26 Santa Barbara .4 miles West of Devil's Peak 533 Comment
  RSA716777  Atriplex californica Fred M. Roberts, Chris M. Barnhill 2004-7-10 6072 Orange Laguna Beach: Crescent Bay, at base of Twin Points. 3 Comment
  RSA737531  Atriplex californica Fred M. Roberts 2008-3-12 6731 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, c.a. 0.8 km W Marine Institute (Dana Point Harbor). 50 Comment
  RSA747714  Atriplex californica Fred M. Roberts 2008-7-10 7073 Orange Dana Point: Dana Point Headlands, CNLM Preserve, along north slopes above Dana Strand Beach, 0.8km WNW Marine Institute, Dana Point Harbor. 45 Comment
  RSA610220  Atriplex californica Fred M. Roberts, Julie Vanderwier 1997-4-29 5018 Orange Bolsa Chica Salt Marsh; (US Fish & Wildlife Service cell 17) west of old oil field, 1.17 km. S SE Chica Survey Mark. 0 Comment
  UCSB52924  Atriplex californica Roberts, Jr., Fred 1983-3-10 Orange Dana Point Headlands: south of Dana Strand Rd., south of Dana Strand Beach, 1.0 km. W Dana Point Harbor; 0.9 km. SW Richard Henry Dana School 35 Comment
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Feb 9 2020
  SEINET5338020  Atriplex canescens J. Robertson 1974-6-25 NS 14 -74 Mono 12 mi. north of Benton, along old road, junction of Hw. 6. 1951 Comment
  CAS-BOT-BC168292  Atriplex canescens var. canescens Robertson 1916-11-1 s.n. San Bernardino Near Redlands Comment
  RSA542648  Atriplex coulteri Fred M. Roberts, Kathy Keane 1988-5-26 4014 Orange Ranch Mission Viejo: Christianitos Canyon, 4.0km ESE Viejo Survey Mark. 162 Comment
  IRVC25488  Atriplex davidsonii Fred M. Roberts, Karen Calloway 1987-8-19 3585 Orange San Joaquin Freshwater Marsh, 1.7km NW University of California, Irvine campus center near Fairchild; Irvine 2 Comment
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Feb 1 2020
  RSA488137  Atriplex glauca Fred M. Roberts 1985-8-30 2186 Orange Laguna Niguel: Niguel Hill, Pacific Island Rd., 1.4 km ESE Aliso Pk. 182 Comment
  RSA599642  Atriplex polycarpa Fred M. Roberts, M. B. Woulfe 1996-8-13 4971 Orange Yorba Linda: Chino Hills, Shell Oil Property, 3.0 km SW Gilman Peak. 201 Comment
  UCSB48235  Atriplex rosea Roberts, Jr., Fred 1981-5-2 Orange Mission Viejo; Camino Capistrano, below Crown Valley Overpass 49 Comment
  UCSB56686  Atriplex rosea Roberts, Jr., Fred 1982-7-31 Orange San Clemente; at end of Calle San Pablo; 1.3 km. E Civic Center 220 Comment
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Feb 2 2020
  RSA743462  Atriplex semibaccata Fred M. Roberts 2008-7-10 7070 Orange Dana Point: Dana Point Headlands, CNLM Preserve, along north slopes above Dana Strand Beach, 0.8km WNW Marine Institute, Dana Point Harbor. 45 Comment
  SD264154  Atriplex semibaccata Jim Roberts 2013-10-31 46 San Diego City of San Diego; Tecolote Canyon Natural Park; near trail S of Acworth Ave; 0.13 mi SW of intersection Old Meadow Road and Acworth Avenue 85 Comment
  IRVC25483  Atriplex serenana var. serenana Fred M. Roberts 1987-7-28 3508 Orange Peter's [Creek] Channel at Barranca Crossing, Irvine 8 Comment
  RSA731750  Atriplex suberecta Fred M. Roberts 2007-11-9 6655 Orange San Juan Canyon along San Juan Creek, about 0.6 km E San Diego FWY. 24 Comment
  RSA0123044  Atriplex torreyi var. torreyi Dar A. Roberts 1983-7-23 FS 107 Mono Along southern end of large shallow pond just west of Rocked-in-Spring. Fish Slough (a desert wetland system 4.5 miles N of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mile drainage axis.) 1274 Comment
  IRVC25412  Atriplex watsonii Fred M. Roberts, Wayne Ferren 1987-4-8 3359 Orange Upper Newport Back Bay, west side, North Star Beach, 0.8km N Coney Island, Newport Beach 0 Comment
  SD196441  Atriplex watsonii Fred Roberts 2000-9-25 5352 San Diego San Diego Bay: Chula Vista, F. & G. Marsh along Marina Parkway just N of G Street Comment
  IRVC29089  Avena barbata Fred M. Roberts 1989-3-17 4204 Orange Aliso Canyon, 3.3km SSE Moulton Pk. Aliso-Wood Canyon Regional Park 30 Comment
  UCSB47869  Avena barbata Roberts, Dar 1983-2-20 Santa Barbara La Purisima Mission State Historic Park; 2 km NE of Lompoc; lawn on W site of vistor's bldg Comment
  UCSB47966  Avena barbata Roberts, Fred 1980-4-3 Orange Hills 1.5 km ENE of Dana Hills High School; Dana Point 85 Comment
  RSA542561  Avena barbata Fred M. Roberts 1989-3-17 4204 Orange Aliso-Wood Canyon Regional Park: Aliso Canyon, 3.4 kilometers SSE Moulton Peak., UTM 3711900m N, 432900m E 55 Comment
  RSA590948  Avena barbata Fred M. Roberts 1991-5-2 4777 Orange San Joaqui Hills, Laguna Canyon, Laguna Laurel, Just W of Laguna Canyon Road, 2km N jct El Toro Road, 4.5km E Signal Peak., UTM Z113718000mN, 4 29 200m E 110 Comment
  RSA737544  Avena fatua Fred M. Roberts 2008-3-12 6717 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, c.a. 0.8 km W Marine Institute (Dana Point Harbor). 50 Comment
  UCSB52947  Azolla filiculoides Roberts, Fred; Polek, M. 1983-11-16 Orange Newport Beach; upper Newport Back Bay near Back Bay Drive, 3.0 km. W UCI campus center 2 Comment
  RSA731922  Baccharis emoryi Fred M. Roberts, Sandy Leatherman 2007-11-27 6657 Orange Anaheim: Santa Ana River, Santa Ana Canyon, just west of Horseshoe Bend on S side of E La Palma Ave., about 0.3km E Weir Cyn. Rd. bridge. 100 Comment
  RSA0028029  Baccharis pilularis Fred M. Roberts 2012-9-6 7702 Orange San Joaquin Hills: Buck Gully, Buck Gully Trail, about 1.8 kilometers NW Pelican Hill summit. 64 Comment
  RSA703357  Baccharis pilularis Fred M. Roberts, Laura Cohen 2004-2-13 6024 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Shady Canyon tributary to Cristianitos Cyn., 1.34 km NW Sycamore Gate, 0.85 km W of Cristianitos Road. 156 Comment
  RSA743499  Baccharis pilularis Fred M. Roberts 2008-9-10 7098 Orange Dana Point: Dana Point Headlands, CNLM Preserve, north of Marguerita Drive, 0.5 km WNW Marine Institute, Dana Point Harbor. 75 Comment
  IRVC21770  Baccharis pilularis subsp. consanguinea Fred M. Roberts 1984-11-27 1442 Orange Novia St. bridge over San Juan Creek, 0.6km S Bench Mark 133, San Juan Capistrano 31 Comment
  RSA685928  Baccharis salicifolia Fred M. Roberts 2003-3-27 5627 Orange Rancho Mission Viejo:Donna O'Neill Land Conservancy, Chistianitos Canyon, along North Ride Trail, 1.37 km N Sycamore Gate, 0.36 km W Chistianitos Rd. 114 Comment
  RSA712941  Baccharis salicifolia Fred M. Roberts 2005-10-3 6306 Orange San Juan Capistrano: San Juan Creek wash, La Novia Road Bridge to 100m E of bridge, 1.4km E Mission San Juan Capistrano, 27 Comment
  RSA731951  Baccharis salicifolia Fred M. Roberts 2007-12-12 6707 Orange Santa Ana Canyon: Santa Ana River, south of Green River Golf course on south side of river, 0.4km E Coal Cyn. Rd. and 0.7km W Riverside Co. line. 129 Comment
  RSA751987  Baccharis salicifolia Fred M. Roberts, Eliza Maher 2008-3-26 6799 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 71 Comment
  SD192234  Baccharis salicifolia Fred Roberts 2006-7-6 6377 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  UCR189288  Baccharis salicifolia Fred M. Roberts, S. Leatherman 2007-9-19 6591 Riverside Santa Ana Canyon, Santa Ana River, across from Green River Golf Course, 0.15 km W of Green River Road bridge 128 Comment
  RSA587883  Baccharis salicifolia Fred M. Roberts 1990-5-8 4616 Orange Soquel Canyon, 1.2km NNW Gilman Peak 240 Comment
  SD164532  Bahiopsis laciniata Fred M. Roberts, Ross Martin 2003-2-5 5562 San Diego Glenview: near Valley View Truck Trail, south of Interstate 8, 0.7 km SSW Los Coches Rd. interchange, Caltrans MSCP Parcel South. On gentle west-facing slope in coastal sage scrub. 287 Comment
  SD164534  Bahiopsis laciniata Fred M. Roberts 2001-5-15 5462 San Diego Jamul Mtns.: SW slopes, E of Upper Otay Lake, 4.8 km SE summit Mother Miguel Mtn. Otay Lakes North MSCP parcel. Along ridge on gentle N-facing slope on rocky clay loam soil in coastal sage scrub. 246 Comment
  SD233733  Bahiopsis laciniata Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5768 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca 0.4 mi WSW of peak 2242. Steep west to south-facing slopes. 427 Comment
  UCD18400  Banisteria schizoptera Warren G. Roberts 1978-7-26 s.n. San Joaquin San Joaquin and Yolo Counties: cities of Stockton and Davis. Comment
  IRVC20371  Barbarea orthoceras D. A. Roberts 1983-3-22 3024 Orange San Juan Canyon, Calif. Rte. 74, south side, 4.3km by road E San Juan Guard Station; 2.3km WNW Sitton Peak, Santa Ana Mountains 407 Comment
  UCSB48022  Barbarea orthoceras Roberts, Fred 1981-4-11 Orange Santa Ana Mtns.: meadow between Falcon Group Camp and Blue Jay Campground; 0.2 km. NNE Blue Jay Campground 1089 Comment
  IRVC24276  Bassia hyssopifolia Fred M. Roberts, G. A. Marsh 1985-10-26 2524 Orange Santa Ana River: adjacent to Huntington Beach; 0.7km SSW Adams Street bridge. southern coastal 4 Comment
  SD182031  Batis maritima Fred Roberts 2000-9-25 5349 San Diego San Diego Bay: Chula Vista, F. & G. Marsh along Marina Parkway just N of G Street Comment
  UCSB48366  Berberis aquifolium var. dictyota Roberts, Jr., Fred 1982-4-18 Orange Santa Ana Mtns.; Hot Springs Canyon, 0.6 km. SW Falcon Group Camp 1033 Comment
  RSA550589  Bergerocactus emoryi Fred M. Roberts, P. Bowler, R. Riefner 1989-4-4 4251 Los Angeles San Clemente Island: Eel Point, ca 10 km S. Wilson Cove, alt. 10 meters 10 Comment
  SD262440  Bernardia incana Jim Roberts, T. Chester, A. Ballway, N. Accola 2015-3-8 85 San Diego Anza-Borrego Desert State Park; Ranchita area; 2.70 miles SE of junction Wilson Road and S-22; several hundred meters off of Wilson trail in Culp Valley; 1.66 miles N of Grapevine Canyon 1184 Comment
  IRVC24999  Beta vulgaris Fred M. Roberts, H. Camp & B. Bretz 1986-6-20 3021 Orange San Joaquin Freshwater Marsh, near Campus Dr., 1.7km NNW UC Irvine campus center, Irvine 2 Comment
  UCR188892  Bidens frondosa Fred M. Roberts, S. Leatherman 2007-9-19 6585 Riverside Santa Ana Canyon, Santa Ana River, across from Green River Golf Course, 0.15 km W of Green River Road bridge 128 Comment
  RSA717046  Bidens laevis Fred M. Roberts 2005-10-3 6289 Orange San Juan Capistrano: San Juan Creek, La Novia Road bridge to 100m E of bridge, 1.4km E Mission San Juan Capistrano. 27 Comment
  RSA730992  Bidens laevis Fred M. Roberts 2006-11-15 6466 Orange Santa Ana Cyn., Santa Ana River, north bank, 1.1 km ENE Imperial Hwy crossing. 85 Comment
  RSA488143  Bidens laevis Fred M. Roberts, Gordon Marsh 1985-10-26 2519 Orange Santa Ana River: adjacent to Huntington Beach: 0.7 km SSW Adams St bridge 4 Comment
  RSA731650  Bidens pilosa var. pilosa Fred M. Roberts 2007-10-29 6629 Orange Laguna Beach: Temple Hill, Nyes Place, ca. 0.2 km S Moulton Meadows Park. 232 Comment
  RSA773503  Bloomeria crocea Fred M. Roberts 1999-5-14 5223 Orange Lomas de Santiago: Loma Ridge, Upper Limestone Canyon, 0.7 km NW Bolero Spring and 2.6 km SW Silverado School 502 Comment
  UCSB48378  Bloomeria crocea Roberts, Fred 1982-5-22 Orange Dana Point: jct. of Stone Hill Dr. & Selva Rd., 1.0km ESE Dana Hills High School; 1.7km SW Marco Forster Junior High School 40 Comment
  SD143285  Bloomeria crocea var. crocea Fred M. Roberts 1997-4-11 4993 San Diego Upper Encinitas Creek watershed east of Rancho Santa Fe Road, Fieldstone Southeast, ca. 5.7 km southwest Double Peak. Fairly common on gentle east-facing slope in open mosaic of coastal sage scrub and native grassland that had burned in 1996. 88 Comment
  RSA542342  Bloomeria crocea var. crocea Fred M. Roberts, Karlin G. Marsh 1988-4-25 3932 Orange San Joaquin Hills: East flank Pelican Hill, 0.9 kilometer SE summit. 120 Comment
  RSA584713  Bloomeria crocea var. crocea Fred M. Roberts 1989-5-18 4373 Orange Santa Ana Mountains: Upper Gypsum canyon, above ridge road, ca. 6.4 km WSW Sierra Peak. 415 Comment
  UCR267193  Boerhavia coulteri var. palmeri Fred M. Roberts 2014-10-26 7901 San Bernardino Sonoran Desert, CHEMEHUEVI VALLEY: tributary to Gary Wash at west base of hill with VABM Huevis, 0.2 km E SR 95 and 4.5 km NW Pyramid Butte 387 Comment
  UCSB52906  Bolboschoenus maritimus Roberts, Fred 1984-8-6 Orange Irvine: UC Irvine, along Abode Circle Road; 0.9 km. ENE campus center; 2.3 km. W French Hill 30 Comment
  UCSB52876  Bothriochloa barbinodis Roberts, Fred 1983-3-16 Orange Laguna Beach, Sycamore Hills, central ridge; 1.4 km NNE jct of El Toro and Laguna Cyn Rds; 5.4 km ESE Signal Peak 177 Comment
  RSA731758  Bougainvillea glabra Fred M. Roberts, Sandy Leatherman 2007-11-9 6647 Orange San Juan Canyon along San Juan Creek, within the community of San Juan Hot Springs. 216 Comment
  SBBG54790  Bowlesia incana D. Roberts, D. Kiehn 1981-3-25 Santa Barbara 1.7 km SSE of Coche Pt Comment
  UCSB38445  Bowlesia incana Roberts, Dar; Kiehn, David 1981-3-25 Santa Barbara Santa Cruz Island, 1.7 km SSE of Coche Point 69 Comment
  UCSB48370  Bowlesia incana Roberts, Fred 1982-4-18 Orange Santa Ana Mountains: San Juan Canyon, Hwy 74, 0.6km SW Lower San Juan Picnic Ground; 1.9km WNW Sitton Peak 420 Comment
  RSA0058187  Brachypodium distachyon Fred M. Roberts 2014-4-21 7872 Orange South Coast: San Joaquin Hills: Upper Laguna Lake 1 (upper Laguna Lake), south basin. 113 Comment
  RSA747609  Brachypodium distachyon Fred M. Roberts 2000-5-4 5316 Orange Lomas de Santiago: Loma Ridge, Hicks Cyn., west of SR 241, 1.9 km E Rattlesnake Reservoir dam and 2.1 km WSW Bee Peak. 210 Comment
  UCR128550  Brachypodium distachyon Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5818 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.5 mi. WSW of peak 2242, south of peak 1517 396 Comment
  UCR239225  Brachypodium distachyon Fred M. Roberts 2012-4-24 7509 Orange San Joaquin Hills, Buck Gully, west of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km west of Signal Peak 179 Comment
  RSA587874  Brachypodium distachyon Fred M. Roberts, K. Nowak, G. Madieros, T. Neely 1990-5-11 4763 Orange Laguna Niguel: Niguel Hill, at end of Le Conte Road, 0.6 kilometer SW summit of Niguel Hill., UTM Z11 37 07 6000m N, 4 31 600m E. 195 Comment
  IRVC18900  Brassica geniculata Fred M. Roberts 1981-7-8 316 Orange Calif. 74, 5.2km E San Juan Capistrano on south side of road, Rancho Mission Viejo 100 Comment
  RSA0069883  Brassica geniculata Fred M. Roberts 2014-4-21 7860 Orange South Coast: San Joaquin Hills: Upper Laguna Lake 1 (upper Laguna Lake), south basin. 113 Comment
  UCR239637  Brassica geniculata Fred M. Roberts 2012-4-24 7505 Orange San Joaquin Hills, Buck Gully, west of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km west of Signal Peak 179 Comment
  UCR258355  Brassica geniculata Fred M. Roberts 2014-4-21 7859 Orange South Coast, SAN JOAQUIN HILLS: Laguna Lake 1 (Upper Laguna Lake), south basin 113 Comment
  UCR211714  Brassica kaber Fred M. Roberts, D. E. Bramlet, Kerry Byrne 2006-4-20 6320 Riverside Perris Basin, Upper Salt Creek watershed, southwest of Hemet, 2 km southeast of Winchester, south of Domenigoni Parkway 448 Comment
  UCR241907  Brassica nigra Fred M. Roberts 2012-4-24 7526 Orange Peninsular Ranges; Coastal Foothills, San Joaquin Hills, Buck Gully, tributary canyon below San Joaquin Hills Road and 2.0 km W Signal Peak 167 Comment
  UCSB36143  Brassica rapa Roberts, Dar 1980-2-24 Santa Barbara 50 yds. off Catherdral Oaks Rd.; western end of road; near dead end 33 Comment
  RSA0073643  Brassica tournefortii Fred M. Roberts, Lee Ann Caranza, Eliza Maher 2009-4-7 7144 Orange South Coast Region: Dana Point Headlands: Dana Point CNLM Preserve, 0.7 km WNW Dana Point Marine Institute at Dana Point Harbor, near 2nd Lookout along trail. 49 Comment
  RSA751984  Brassica tournefortii Fred M. Roberts, Lee Ann Carranza 2008-3-26 6801 Orange Dana Point: Dana Point Headlands, CNLM Preserve, 0.8km W Marine Institute, Dana Point Harbor. 50 Comment
  UCSB48079  Brickellia californica Roberts, Fred 1981-11-15 Orange Santa Ana Mtns.; San Juan Canyon, Hwy. 74, across road from entrance to Lower San Juan Picnic Ground 436 Comment
  SD250840  Brodiaea filifolia Fred Roberts 2008-5-25 6999 San Diego San Onofre State Park: Inland section, Cristianitos Cyn., east of Calle Extremo St., 2.6 km NNE Clemente Survey Mark and 4.9 km N San Mateo Campground [San Clemente: UTM 11S 04 46 326mE, 37 01 017mN]. 99 Comment
  SD250841  Brodiaea filifolia Fred Roberts 2000-5-22 5332 San Diego San Marcos: just north of the intersection of Mission Ave. and Santa Fe Rd., about 1.1 km WNW Palomar College campus on the Loma Alta development. [San Marcos Quad: UTM Z11 04 81 743mE, 36 68 407mN]. 180 Comment
  SD164585  Brodiaea orcuttii Fred M. Roberts 2001-7-20 5499 San Diego San Ysidro Mountains,northwest foothills just southeast of Otay Lake, 2.0 km east-northeast Savage Dam,along unnamed canyon above Buschalaugh Cove Along narrow rocky flowing stream course on gravelly soil in mulefat-poverty weed scrub. 174 Comment
  SD58370  Brodiaea stellaris Harry K. Roberts 1961-5-23 Sonoma About 1.75 miles northeast of Occidental, just west of County Dump at top of Harrison Grade, Ao to I(c) mile west of the type locality of Arctostaphylos bakeri. 221 Comment
  RSA0127606  Brodiaea terrestris subsp. kernensis Fred M. Roberts 2016-4-14 8036 Orange University of California, Irvine campus: western edge of School of Medicine Complex, about 0.9 km W center of campus. 27 Comment
  UCSB47948  Bromus carinatus Roberts, Dar 1980-5-3 Orange 2.0 km NW of jct between Hwy 74 and Main Divide Truck Trail 960 Comment
  RSA725588  Bromus catharticus Fred M. Roberts 2007-8-6 6560 Orange San Joaquin Hills: Laguna Beach, Laguna Cyn. on east side of Laguna Cyn. Rd. adj. to dog park, 1.2 km S (air) from El Toro Road and 1.8 km WSW Moulton Survey Mk. 52 Comment
  RSA0013959  Bromus diandrus Fred M. Roberts 2008-5-7 6939 Orange Lomas de Santiago: Loma Ridge, Limestone Ridge between Dripping Spr. and Limestone Cyn., 3.5 km NW Bolero Lookout and 1.7 km E Bee Peak. Irvine Ranch Conservancy. 481 Comment
  RSA0073653  Bromus diandrus Fred M. Roberts 2010-3-12 7182 Orange Southeast Coast: Dana Point Headlands: Harbor Point Park, South of Green Lantern and west of Dana Point Harbor, c.a. 150 meters SE Interpretive Center. 50 Comment
  RSA737538  Bromus diandrus Fred M. Roberts 2008-3-12 6724 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, c.a. 0.8 km W Marine Institute (Dana Point Harbor). 50 Comment
  UCR209337  Bromus grandis Fred M. Roberts, Robt. L. Allen 2008-6-23 7056 Riverside Santa Ana Mountains, Santiago Peak, north slope, Main Divide Truck Trail, 0.4 km north-northeast of summit 1639 Comment
  RSA747698  Bromus hordeaceus Fred M. Roberts 2008-4-16 6914 Orange Dana Point: Dana Point Headlands, CNLM Preserve, 0.8 km W Marine Institute, Dana Point Harbor. 60 Comment
  RSA542368  Bromus hordeaceus Fred M. Roberts 1988-4-10 3915 Orange Lomas De Santiago: Loma Ridge, 1.0 kilometer N Bolero Lookout., UTM 37 31 1000m N, 4 39 600m E. 415 Comment
  RSA542558  Bromus hordeaceus Fred M. Roberts 1987-4-21 3380 Orange Aliso Viejo: Aliso Creek, Aliso Creek bike trail, 3.0 kilmeters ENE Moulton Peak., UTM 3715500m N, 433650m E 73 Comment
  RSA685934  Bromus hordeaceus subsp. hordeaceus Fred M. Roberts, David E. Bramlet 2003-3-27 5618 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, west slopes of Chistianitos Cyn., 0.69km N Sycamore Gate, 0.96km W Chistianitos Rd. 122 Comment
  UCR242753  Bromus madritensis Fred M. Roberts 2012-5-10 7581 Orange SAN JOAQUIN HILLS: Buck Gully, south tributary, north slope Pelican Hill, just north of Pelican Hills Drive, 0.7 km N Pelican Hill summit 154 Comment
  UCSB47581  Bromus madritensis subsp. rubens Roberts, Fred 1980-4-3 Orange Along Hwy 74, 0.2 km SW of Orange-Riverside Co. line, 0.4 km NNE Lower San Juan Picnic Ground, San Juan Cyn; Santa Ana Mtns 128 Comment
  UCSB47859  Bromus madritensis subsp. rubens Roberts, Dar 1983-2-20 Santa Barbara La Purisima Mission State Historic Park; 2 km NE of Lompoc; up tail 100 m above lower reservoir Comment
  RSA708538  Bromus tectorum Fred M. Roberts, Robert L. Allen, Chris Barnhill, Nancy Hatfield 2005-5-30 6218 Orange northwest slope of Modjeska Peak, Harding Canyon watershed, Main Divide Road, 0.61km NNW summit Modjeska Peak. 1407 Comment
  UCR211702  Caesalpinia gilliesii Fred M. Roberts, Kerry M. Byrne 2006-6-27 6346 Riverside Perris Basin, Hemet, just south of Florida Ave. and east of California Ave, 2.2 km northwest of the west end of Hemet Ryan Airport runway 463 Comment
  RSA752711  Cakile maritima Fred M. Roberts, Sandra Leatherman, Jennifer S. Pareti 2009-4-14 7147 Orange Dana Point Headlands: Dana Strand Beach and slopes above beach, 0.8 km WNW Marine Institute at Dana Point Harbor. CNLM Dana Point Preserve. 3 Comment
  UCSB48047  Cakile maritima Roberts, Fred 1981-9-26 Orange Huntington Beach; Calif. Rte. 1, near mouth of Santa Ana River, 0.1 km. N jct. Brookhurst Ave.; 0.1 km. SW Bench Mark 7 2 Comment
  RSA716783  Calamagrostis koelerioides Fred M. Roberts, Carol A. Roberts, Devoree Volgado 1995-5-6 4941 Orange Santa Ana Mountains region: Ridge between Hot Springs Cyn. and Viejo Cyn., San Juan Trail, 3.7 km WNW Lower San Juan Picnic Ground. 622 Comment
  RSA594806  Calandrinia ciliata Fred M. Roberts, Cathy Nowak 1995-4-19 4924 Orange Santa Ana Mountains: Lower Hot Springs Canyon, San Juan Trail, 0.7 km NW Juan Rancho Survey Mark. 256 Comment
  RSA665954  Callitriche marginata Fred M. Roberts, Michelle Lee, Kristen Szabo 2001-4-13 5425 Orange Rancho Mission Viejo: South of San Juan Creek, 0.6km WNW Median Rancho Survey Marker. PCR Vernal Pool 2. 183 Comment
  RSA708813  Callitriche marginata Fred M. Roberts, Robert L. Allen, Chris Barnhill, Carol A. Roberts 2005-4-10 6162 Orange Costa Mesa: Fairview Park, west of north end of Canyon Drive, c.a. 0.2km WNW Marison Special Education Center (Canyon Sch. on topos). 24 Comment
  RSA610237  Callitriche marginata Fred M. Roberts, Tony Bomkamp, R. E. Riefner 1997-2-27 4979 Orange Costa Mesa: Fairview Park, 0.1 km W Canyon School. 24 Comment
  RSA731005  Calocedrus decurrens Fred M. Roberts, B. Allen, D. Olsen 2007-1-19 6507 Orange Beek s Place along Main Divide Rd., 4.1 km NW Pleasant Peak. 852 Comment
  RSA594817  Calochortus albus Fred M. Roberts, Sandy Leatherman, Brian Leatherman 1994-4-24 4911 Orange Santa Ana Mountains: San Juan Canyon, CA route 74, Lower San Juan Picnic Ground. 354 Comment
  RSA0125887  Calochortus catalinae Fred M. Roberts 2008-5-14 6970 Orange Lomas de Santiago: Loma Ridge, Bee Peak, 0.1 km W summit. 515 Comment
  RSA552928  Calochortus catalinae Fred M. Roberts, Carol A. Roberts 1989-5-11 4350 Orange Santa Ana Mountains: Upper Gypsum Canyon, along ridge road, 5.6 kilometers SW Sierra Peak. 472 Comment
  RSA590955  Calochortus catalinae Fred M. Roberts, Cathy Novak, Dave Bontrager 1991-4-18 4770 Orange Santa Ana Mountains: c. 0.7 kilometers N junction Santiago Canyon Road and Live Oak Canyon Road, 7.7 kilomers WSW Modjeska Peak. 411 Comment
  RSA747606  Calochortus catalinae Fred M. Roberts 2000-5-4 5313 Orange Lomas de Santiago: Loma Ridge, Hicks Cyn., west of SR 241, 1.9 km E Rattlesnake Reservoir dam and 2.1 km WSW Bee Peak. 210 Comment
  RSA747612  Calochortus catalinae Fred M. Roberts 2000-4-27 5302 Orange Lomas de Santiago: Lomas Ridge, Agua Chinon Wash, 1.5 km S Bolero Spr. and 2.1 km WSW Bolero Lookout. 281 Comment
  RSA749314  Calochortus catalinae Fred M. Roberts 2008-3-25 6791 Orange Loma Ridge: Upper Hicks Cyn. near Haul Road, c.a. 4.4 km by road from Portola Pkwy. and 3.2 km ENE Rattlesnake Cyn. Reservoir. 269 Comment
  RSA749519  Calochortus catalinae Fred M. Roberts 2009-4-11 6886 Orange Lomas de Santiago: Loma Ridge, upper Dripping Springs Cyn., 0.9 km NE Bee Peak and 1.2 km WNW Dripping Springs. 448 Comment
  UCR209385  Calochortus catalinae Fred M. Roberts 2008-3-25 6791 Orange Loma Ridge, Upper Hicks Canyon near Haul Road, c. 4.4 km by road from Portola Parkway, and 3.2 km east northeast Rattlesnake Canyon Reservoir 269 Comment
  SD164406  Calochortus concolor Fred M. Roberts, Michelle Balk 2004-6-13 6053 San Diego Laguna Mountains: Pine Creek Road, ca. 3.7km W Sunrise Hwy. by road, UTM Z11 05 48 158mE, 36 39 808mN. 1599 Comment
  SD164405  Calochortus dunnii Fred M. Roberts, Carol A. Roberts 2004-6-20 6067 San Diego Cuyamaca Mountains: SR79, Inspiration Point, ca. 4km SE Julian, UTM Z11S 05 40 327mE, 36 56 663mN. 1416 Comment
  RSA679224  Calochortus invenustus Fred M. Roberts 2003-6-25 5946 Orange Santiago peak, north slopes along ridge east of Main Divide truck trail, 0.6km NNW summit. 1605 Comment
  UCR215367  Calochortus plummerae Fred M. Roberts 2006-6-28 6348 Riverside Peninsular Range; San Jacinto Mountains, San Jacinto River Canyon, south fork, South Fork Trail 3.7 km west summit of Baldy Mountain 1266 Comment
  IRVC28112  Calochortus splendens Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5778 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  RSA542333  Calochortus splendens Fred M. Roberts 1988-4-10 3919 Orange Lomas De Santiago: Loma Ridge, 1.0 kilometer N Bolero Lookout. 415 Comment
  RSA594819  Calochortus splendens Fred M. Roberts, Sandy Leatherman, Brian Leatherman 1994-4-24 4913 Orange Santa Ana Mountains: San Juan Canyon, CA route 74, Lower San Juan Picnic Ground. 354 Comment
  RSA716098  Calochortus splendens Fred M. Roberts, Carol A. Roberts 2004-5-16 6047 Ventura Lockwood Valley: Mutau Flat Road, 3.5km S by road jct. Lockwood Valley Road and 2.6km NE San Guillermo Mtn. 1737 Comment
  RSA747589  Calochortus splendens Fred M. Roberts 2000-5-4 5317 Orange Lomas de Santiago: Loma Ridge, Hicks Cyn., west of SR 241, 1.9 km E Rattlesnake Reservoir dam and 2.1 km WSW Bee Peak. 210 Comment
  RSA788918  Calochortus splendens Fred M. Roberts 1999-6-10 5240 Orange Lomas de Santiago: Loma Ridge, Central Limestone Cyn., adjacent to the Sinks, 0.7 km E Bolero Spring and 1.9 km NW Bolero Lookout. 411 Comment
  SD233656  Calochortus splendens Fred M. Roberts, M. White, D. Flietner 2003-5-4 5778 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242. 427 Comment
  UCSB47576  Calochortus splendens Roberts, Fred 1980-4-3 Orange Hills, 1.0km NE Dana Hills High School, Dana Point 75 Comment
  SD181877  Calochortus superbus Fred Roberts, Mark Elvin 2005-6-29 6254 San Diego Palomar Mtns.: Along S6, across from Canfield Rd., east of Sunday School Flat and 3.1km SSW Palomar Observatory. 1484 Comment
  RSA0013576  Calochortus weedii Fred M. Roberts, Carol A. Roberts 2007-7-6 6541 Santa Barbara West Camino Cielo Rd., 0.6 km NW La Cumbre Peak (Little Pine Mtn.) 1195 Comment
  UCSB50637  Calochortus weedii Roberts, Fred 1982-7-8 Orange Laguna Niguel; canyone near Pacific Island Dr., 1.4 km ESE Aliso Peak, 1.1km NE Bench Mark 133 205 Comment
  RSA0014077  Calochortus weedii var. intermedius Fred M. Roberts 2008-5-27 7003 Orange Lomas de Santiago: Loma Ridge, Hicks Cyn., c.a. 0.2km beyond Hicks Cyn., Gate, 2.2km WNW Bee Peak, Irvine Ranch conservancy 213 Comment
  RSA581433  Calochortus weedii var. intermedius Fred M. Roberts 1989-6-7 4376 Orange Santa Ana Mountains: Upper Gypsum Canyon along divide between Gypsum and Blind Canyon, 6.3 kilometers WSW Sierra Peak. 411 Comment
  RSA588720  Calochortus weedii var. intermedius Fred M. Roberts, D. Bontrager 1990-6-5 4676 Orange Rancho Mission Viejo: Lower Canada Gobernidora, ca. 3.1 km W Point Rancho Survey Marker. 122 Comment
  RSA699753  Calochortus weedii var. intermedius Fred M. Roberts, David E. Bramlet 2003-6-6 5884 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.7km SW int. Cristianitos and TRW Rds. and 0.23km W of SDG&E substation. 119 Comment
  RSA725577  Calochortus weedii var. intermedius Fred M. Roberts, Robert L. Allen, Trish Smith 2007-6-15 6537 Orange Upper Fremont Canyon, 5.2km ENE Irvine Lake Spillway and 2.0km WNW Hidden Ranch. 673 Comment
  RSA788903  Calochortus weedii var. intermedius Fred M. Roberts 2008-6-12 7043 Orange Lomas de Santiago: Loma Ridge, ridge north of Shoestring Road, 2.2 km S Irvine Lake dam, Irvine Ranch Land Conservancy. 325 Comment
  UCR209401  Calochortus weedii var. intermedius Fred M. Roberts, Robt. L. Allen 2008-6-23 7051 Riverside Santa Ana Mountains, Santiago Peak, east slope, Main Divide Truck Trail, 0.7 km northeast of summit 1580 Comment
  RSA731170  Calochortus weedii var. vestus Fred M. Roberts 2006-7-18 6391 Santa Barbara East Camino Cielo Road, 2.7 km by road E jct. SR54. and 0.8 km NW Laurel Springs. 833 Comment
  RSA731171  Calochortus weedii var. vestus Fred M. Roberts 2006-7-18 6392 Santa Barbara Santa Ynez Mountains: East Camino Cielo Road, 2.7 km by road E jct. SR54. and 0.8 km NW Laurel Springs. 1024 Comment
  RSA731173  Calochortus weedii var. vestus Fred M. Roberts 2006-7-17 6388 Santa Barbara West Camino Cielo Road, ca 7.1 km by road east jct. Refugio Road (Refugio Pass) and 1.8 km WNW Santa Ynez Peak. 1157 Comment
  RSA773548  Calochortus weedii var. weedii Fred M. Roberts, Robert Allen 2008-6-9 7036 Orange Santa Ana Mts.: Hot Spring Canyon, along road, 0.9 km N San Juan Fire Station 255 Comment
  SD181881  Calochortus weedii var. weedii Fred Roberts, Mark Elvin 2005-6-29 6253 San Diego Palomar Mtns.: Along S6, 2.8km by air SSW town of Palomar Mountain. 1015 Comment
  RSA542424  Calycadenia tenella Fred M. Roberts 1988-5-13 3967 Orange Lomas de Santiago: Loma Ridge, Upper Limestone Canyon near spring, 2.3 km NW Bolero Lookout. 439 Comment
  RSA747706  Calycadenia tenella Fred M. Roberts 2008-5-16 6984 Orange Dana Point: Dana Point Hradland, CNLM Preserve, north of Marguerita Drive, 0.5 km WNW Marine Institute, Dana Point Harbor. 75 Comment
  UCR128544  Calystegia macrostegia Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5785 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 427 Comment
  UCR239621  Calystegia macrostegia subsp. cyclostegia Fred M. Roberts 2012-4-24 7499 Orange San Joaquin Hills, Buck Gully, west of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km west of Signal Peak 179 Comment
  RSA708723  Calystegia occidentalis subsp. fulcrata Fred M. Roberts, Robert L. Allen, Chris Barnhill, Nancy Hatfield 2005-5-30 6225 Orange west slope of Modjeska Peak, Harding Canyon watershed, Main Divide Road, 0.46km W summit. 1670 Comment
  SD187855  Calystegia occidentalis subsp. fulcrata Laurie Roberts, Lane McClelland 2006-5-29 22 San Diego Descanso. NW base of Guatay peak, along Old Highway 80, just NE of its intersection with SR- 79. 1110 Comment
  RSA0039800  Camissonia bistorta Fred M. Roberts, D. E. Bramlet 2003-4-10 5647 Orange Rancho Mission Viejo: Donna O Neill Land Conservancy, ridge between Cristianitos Cyn. and Segunda Deshecha Canada, 1.54km W Gato Gate and 1.59km NW Edison substation. 262 Comment
  RSA542488  Camissonia bistorta Fred M. Roberts, G. A., K. G. Marsh 1988-4-26 3937 Orange San Joaquin Hills: Pelican Hill, 0.5km SE summit. 165 Comment
  UCR215311  Camissonia bistorta Fred M. Roberts 2008-3-27 6802 Orange South Coast, Dana Point; Dana Point Headlands, Center for Natural Lands Mgmt. Preserve near NE gate, 0.5 km west of Marine Institute, Dana Point Harbor 75 Comment
  IRVC28102  Camissonia californica Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5776 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  IRVC28446  Camissonia californica Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5706 San Diego Otay Mountain, south side near crest of ridge east of lower "Butteweg Canyon" along the border trail, Tijuana River watershed Peninsular Range, San Ysidro Mountains 305 Comment
  RSA696144  Camissonia californica Fred M. Roberts, Andy Pinolo, Kam Muri 2003-5-3 5706 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of ridge east of lower Butteweg Canyon along the border trail, Tijuana River watershed. 305 Comment
  RSA0073650  Camissonia cheiranthifolia subsp. suffruticosa Fred M. Roberts 2010-3-12 7181 Orange Southeast Coast: Dana Point Headlands: Harbor Point Park, South of Green Lantern and west of Dana Point Harbor, c.a. 150 meters SE Interpretive Center. 50 Comment
  RSA737479  Camissonia cheiranthifolia subsp. suffruticosa Fred M. Roberts 2008-3-12 6737 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, c.a. 0.8 km W Marine Institute (Dana Point Harbor). 50 Comment
  RSA539394  Camissonia ignota Fred M. Roberts, Carol A. Roberts 1988-6-2 4033 Orange Santa Ana Mountains: Silverado Canyon. Maple Springs Truck trail. 4.3 km above gate, 1.0 km WSW Bald Peak. 817 Comment
  UCR128546  Camissonia ignota Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5783 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 427 Comment
  RSA542490  Camissonia micrantha Fred M. Roberts, T. Sholars, B. Stechmeyer 1988-3-29 3880 Orange Santa Ana Mountains: Hot Springs Canyon, 0.5 km by road north Hwy 74, 0.9 km ESE Juan Rancho Survey Marker. 223 Comment
  UCR209364  Camissonia robusta Fred M. Roberts, Linda Farley 2008-3-28 6830 Orange Santa Ana Mountains, Upper Weir Canyon, Irvine Ranch Conservancy, 3.3 km east-northeast of Robbers Peak on ridge north of canyon 427 Comment
  UCSB52877  Camissoniopsis bistorta Roberts, Fred 1983-3-16 Orange Laguna Beach, Sycamore Hills, central ridge, 1.4km NNE jct. El Toro and Laguna Canyon Rds, 5.4km ESE Signal Peak, 177 Comment
  UCSB48058  Camissoniopsis cheiranthifolia subsp. suffruticosa Roberts, Fred 1982-4-3 Orange Dana Point Headlands, north of Dana Strand Road, 0.5km W Dana Point Harbor; 0.8 km SSW Richard Henry Dana School 80 Comment
  SD197830  Camissoniopsis ignota Fred Roberts, Mike White, D. Flietner 2003-5-4 5783 San Diego San Ysidro Mountains; Otay Mountain; head canyon ca. 2 miles airline northwest of Otay Mountain Peak, ca. 0.4 miles westsouthwest of peak 2242. 427 Comment
  IRVC25563  Capsella bursa-pastoris Fred M. Roberts 1989-3-17 4203 Orange Aliso Canyon, 3.3km SSE Moulton Pk. Aliso-Wood Canyon Regional Park 30 Comment
  RSA731753  Capsella bursa-pastoris Fred M. Roberts 2007-11-9 6652 Orange San Juan Canyon along San Juan Creek, about 0.6 km E San Diego FWY. 24 Comment
  UCR267209  Capsella bursa-pastoris Fred M. Roberts, Carol A. Roberts 2014-11-11 7919 San Bernardino Sonoran Desert, Chemehuevi Valley: tributary to Gary Wash at west base of hill with VABM Huevis, 0.2 km E SR 95 and 4.5 km NW Pyramid Butte 387 Comment
  HSC6629  Capsella bursa-pastoris S. J. Roberts 1965-4-8 11 Humboldt 0.5 mi. S of junction of Alliance Rd. and Hwy. 101 Comment
  UCSB36157  Cardamine californica Roberts, Dar 1980-2-2 Santa Barbara 4.2 miles on Refugio Rd. from 101 junction, Santa Ynez Mts. 200 Comment
  RSA752304  Cardionema ramosissimum Fred M. Roberts, Eliza Maher 2008-3-26 6794 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 65 Comment
  UCSB47803  Cardionema ramosissimum Roberts, Dar 1982-11-6 Santa Barbara La Purisima Mission State Historic Park; 2 km. NE of Lompoc City Limit; ca. 450 m. southwest of Staff Residences Comment
  CAS-BOT-BC17733  Carex alma G. Robertson 1906-6-1 s.n. San Bernardino Mill Creek Canyon. Comment
  IRVC21481  Carex globosa Fred M. Roberts, Wayne R. Ferren 1984-3-20 1281 Santa Barbara Sata Cruz Island; Centinella; W Pine Forest; 6.8km WNW Research Station; 2km SSW Devil's Peak Channel Islands 370 Comment
  RSA0127609  Carex praegracilis Fred M. Roberts 2016-4-26 8040 Orange Lomas de Santiago: South of Santiago Canyon Road in tributary to Lower Presida Canyon just southwest of Irvine Lake, 2.2 km S Irvine Lake dam spillway and 0.6 km SW Irvine Lake Park. 265 Comment
  UCR247900  Carex schottii Fred M. Roberts 2013-6-12 7794 Orange Peninsular Ranges, SANTA ANA MTNS.: Lower Silverado Canyon along Silverado Creek on north side of Silverado Canyon Road, 0.6 km ENE Silverado School and 1.4 km up stream Black Star Road crossing. 320 Comment
  RSA0026256  Carex spissa Fred M. Roberts 2013-6-12 7794 Orange Peninsular Ranges: Santa Ana Mtns: Lower Silverado Canyon along Silverado Creek on north side of Silverado Canyon Road, 0.6 kilometers ENE Silverado School and 1.4 kilometers up stream Black Star Road Crossing. 320 Comment
  RSA725519  Carex spissa Fred M. Roberts, Robert L. Allen 2007-9-28 6605 Orange Santa Ana Mtns.: Silverado Cyn., along Silverado Cyn. Rd. at eastern edge of town of Silverado. 347 Comment
  RSA704426  Carpobrotus edulis Fred M. Roberts, David E. Bramlet 2004-7-30 6083 Orange Rancho Mission Viejo: Donna O Neill Land Conservancy, Cristianitos Cyn. along Cristianitos Ck., 1.1 km SSW Gato Gate and 0.32km W Cristianitos Road. 73 Comment
  RSA743459  Carpobrotus edulis Fred M. Roberts 2008-7-10 7067 Orange Dana Point: Dana Point Headlands, CNLM Preserve, along north slopes above Dana Strand Beach, 0.8km WNW Marine Institute, Dana Point Harbor. 45 Comment
  CDA6934  Carrichtera annua Fred M. Roberts 2007-4-6 6512 San Diego Southern Coast; Carlsbad, La Costa Greens Ecological Reserve, east side of El Camino Real ca. 2 km south of Palomar Airport Road. Comment
  SEINET10575481  Carrichtera annua Fred M. Roberts 2007-4-6 Roberts 6513 San Diego Southern Coast: Carlsbad, La Costa Greens Ecological Reserve, east side of El Camino Real c. 2 km south of Palomar Airport Rd. 52 Comment
  UC1930977  Carrichtera annua Fred M. Roberts 2007-4-6 6512 San Diego Southern Coast: Carlsbad, La Costa Greens Ecological Reserve, east side of El Camino Real c. 2 km south of Palomar Airport Rd. Comment
  UCR182834  Carrichtera annua Fred M. Roberts 2007-4-6 6512 San Diego Southern Coast, Carlsbad, La Costa Greens Ecological Reserve, east side of El Camino Real c. 2 km south of Palomar Airport Rd. 52 Comment
  RSA542505  Castilleja affinis Fred M. Roberts 1987-3-31 3297 Orange Lomas de Santiago: Lomas [Loma] Ridge, upper Serrano Canyon, east fork, reservoir, 2.7 kilometers SE Bolero Lookout. 350 Comment
  RSA588797  Castilleja affinis Fred M. Roberts, Dave Bontrager 1990-4-18 4563 Orange Rancho Mission Viejo: ridge between Christanitos and Gabino Canyons (Riverside Cement Lease Holding), 5.5 km SE Playa Survey Marker. 152 Comment
  RSA0012751  Castilleja affinis subsp. affinis Fred M. Roberts 2012-5-10 7576 Orange San Joaquin Hills: Buck Gully, south tributary, north slope Pelican Hill, just north of Pelican Hills Drive, 0.7 km N Pelican Hill summit. 154 Comment
  RSA747597  Castilleja affinis subsp. affinis Fred M. Roberts 2000-5-19 5330 Orange Lomas de Santiago: Loma Ridge, ridge west of Bee Peak above Bee Cyn. landfill, 0.2 km W Bee Peak. 500 Comment
  RSA679168  Castilleja applegatei subsp. martinii Fred M. Roberts 2003-6-25 5933 Riverside Indian Truck Trail, 8.7 km by road W La Palma Rd., 2.5 km ENE Trabuco Peak 937 Comment
  UCR209355  Castilleja exserta subsp. exserta Fred M. Roberts 2008-4-8 6848 Orange Lomas de Santiago, Loma Ridge, Upper Dripping Springs Cnyn, 1.0 km northeast of Bee Peak, Irvine Ranch Conservancy 458 Comment
  RSA524504  Castilleja foliolosa Fred M. Roberts, H. Camp 1987-3-10 3240 Orange Casper's Regional Park: San Juan Canyon, north of Hwy 74, ca. 1.9km WSW San Juan Hot Springs. 335 Comment
  UCSB47636  Castilleja foliolosa Roberts, Fred 1980-5-3 Orange Main Divide Truck Trail; on north side of road; 0.1 km south of Trabuco Peak; Santa Ana Mtns 1350 Comment
  RSA588889  Castilleja minor subsp. spiralis Fred M. Roberts Jr. 1990-6-4 4665 Orange Hall Canyon, 1.8 km NNW Mustang Spring at east edge of Flying B Ranch 421 Comment
  RSA701803  Castilleja minor subsp. spiralis Fred M. Roberts 1999-7-22 5251 Orange Lomas de Santiago: Lomas Ridge, tributary to Limestone Canyon at Dripping Springs. Limestone Wilderness Park. 415 Comment
  RSA542652  Caulanthus heterophyllus Fred M. Roberts 1988-3-15 3857 Orange Rancho Mission Viejo; Verdugo Canyon, 1.3 km SSW Lucan Survey Marker 201 Comment
  SBBG54781  Ceanothus arboreus F. Roberts 1981-3-24 Santa Barbara due S of Devil's Pk 430 Comment
  RSA0029943  Ceanothus crassifolius Fred M. Roberts, Sandy Leatherman 2013-2-13 7721 Orange Santa Ana Mountains: Ridge south of central Santiago Canyon, near Joplin Trail, 3.7 km SE Modjeska (town). 800 Comment
  RSA594804  Ceanothus crassifolius Fred M. Roberts 1992-2-26 4835 Orange Santa Ana Mts. Ridge west of Black Star Canyon and north of confluence of Black Star Canyon and Santiago Canyon, 4.3 km ESE Irvine Lake spillway. 353 Comment
  SD188164  Ceanothus greggii var. perplexans Laurie Roberts, Maureen Phillips 2006-5-12 11 San Diego Descanso. Fire road on northeast side of Guatay Peak, ca. I(c) mi NE of summit. 1220 Comment
  UCSB47641  Ceanothus leucodermis Roberts, Fred 1980-5-3 Orange Main Divide Truck Trail on fire break, 1.6km WNW Trabuco Peak, Santa Ana Mtns., 1295 Comment
  RSA542422  Ceanothus megacarpus var. megacarpus Fred M. Roberts 1988-5-12 3963 Orange Anaheim Hills: Upper Deer Canyon, 7.7 km W Sierra Peak. 268 Comment
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Aug 23 2013
  UCR114966  Ceanothus ophiochilus Fred M. Roberts, Steve Boyd, Tom Leslie 1992-2-7 4831 Riverside Peninsular Range, Vail Lake, ridge about 2km WSW of lake east of 'Little' Oak Mountain 600 Comment
  SD242621  Ceanothus otayensis Fred Roberts, Carol A. Roberts 2010-3-28 7236 San Diego San Ysidro Mtns.: ridge south of O'Neal Cyn., Otay Mtn. Truck Trail, 3.8 km by air SW Otay Mtn. summit. Otay Mesa USGS 7.5min quad, UTM 11S 05 11 498mE, 36 04 180mN. 537 Comment
  RSA542409  Ceanothus spinosus Fred M. Roberts 1989-2-23 4189 Orange Aliso-Wood Canyon Regional Park: Niguel Hill above Aliso Canyon along the northern edge of Sea View Pk., 1.2km ENE Aliso Pk. 250 Comment
  UCR246516  Ceanothus spinosus Fred M. Roberts 2013-5-30 7776 Orange Lomas de Santiago, Santiago Creek Wash, at Santiago Canyon Road bridge, south side, 0.3 km west of the junction of Silverado and Santiago Canyon Roads 299 Comment
  UCSB48024  Ceanothus spinosus Roberts, Fred 1981-4-11 Orange Santa Ana Mtns.: San Juan Canyon, hwy. 74, 3.7km E San Juan Guard Station 114 Comment
  IRVC27990  Ceanothus tomentosus Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5717 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  UCR128375  Ceanothus tomentosus Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5717 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  RSA588778  Ceanothus tomentosus subsp. olivaceus Fred M. Roberts 1990-4-13 4559 Orange Upper Maybe Canyon near SkylineDrive 0.2 km NE Oak Flat, 2.7 km SSE Sierra Peak. 841 Comment
  RSA594879  Ceanothus tomentosus var. olivaceus Fred M. Roberts 1992-2-26 4834 Orange Santa Ana Mtns: ridge west of Black Star Canyon and north of confluence of Black Star Canyon and Santiago Canyon, 4.3 km ESE Irvine Lake spillway. 353 Comment
  SD242622  Ceanothus verrucosus Fred Roberts 2010-2-12 7173 San Diego Carlsbad: La Costa Green CNLM Preserve, along Camino Vida Roble Rd., 0.6 km by air SSW jct. El Camino Real and Town Garden Rds., about 1.6km SE Palomar Airport. UTM 04 75 041mE 36 64 431mN. 99 Comment
  SD249025  Ceanothus verrucosus Jim Roberts 2013-5-22 14 San Diego City of San Diego; Tecolote Canyon Natural Park; vicinity of 175 yards SW of junction Mt. Alifan Drive and Mt. Everest Blvd. 93 Comment
  RSA701801  Centaurea melitensis Fred M. Roberts, David E. Bramlet 2003-6-6 5890 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.7km SW int. Cristianitos and TRW Rds. and 0.23km W of SDG&E substation. 94 Comment
  UCR128515  Centaurea melitensis Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5697 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed 305 Comment
  UCSB48218  Centaurea melitensis Roberts, Fred 1981-6-20 Orange Dana Point: 0.6km NE Dana Hills High School 67 Comment
  RSA716660  Centaurea solstitialis Fred M. Roberts, Michelle Balk, Robert Allen, Megan Enright 2004-7-18 6077 Orange Santa Ana Mtns.: San Jun Cyn., SR 74, north side of road, c.a. 4.6km E San Juan Guard Sttion by road. 393 Comment
  IRVC21253  Centaurium venustum Fred M. Roberts 1982-7-7 742 San Diego S Laguna; Niguel Hill; 1.4 km ESE Aliso Pk. 2.5 km SSW Niguel Fire Station. Southern Coastal 200 Comment
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Mar 5 2009
  RSA725538  Centranthus ruber Fred M. Roberts, Robert L. Allen 2007-9-28 6608 Orange Santa Ana Mtns.: Silverado Cyn., along Silverado Cyn. Rd. at eastern edge of town of Silverado. 347 Comment
  UCSB72266  Cerastium glomeratum Roberts, Fred 1980-5-3 Orange Santa Ana Mtns.; San Juan Canyon, near mouth of Viejo Cyn.: below Rte. 74; 2.5 km. by road ENE San Juan Guard Station; 0.5 km. WSW Bm 1100 288 Comment
  RSA539367  Cercocarpus betuloides Fred M. Roberts 1989-2-21 4181 Orange Aliso-Woods Canyon Regional Park: Niguel Hill, 1.6 km ENE Aliso Peak. 268 Comment
  RSA0014996  Cercocarpus betuloides var. betuloides Fred M. Roberts 2008-5-14 6963 Orange Lomas de Santiago: Loma Ridge, upper Bee Flat Canyon below Loma Ridge Rd., 1.3 km N Bee Peak and 5.4 km NW Bolero Lookout, Irvine Ranch Conservancy. 381 Comment
  RSA539366  Cercocarpus minutiflorus Fred M. Roberts 1989-2-21 4182 Orange Aliso-Woods Canyon Regional Park: Niguel Hill, 1.6 km ENE Aliso Peak. 268 Comment
  IRVC23289  Chaenactis artemisiifolia Fred M. Roberts, K. G. Marsh 1985-7-18 2053 Orange Temple Hill, Goff Ridge, 0.9km NE Goff Island off Nye Place Laguna Beach 168 Comment
  SD233738  Chaenactis artemisiifolia Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5756 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side in lowwer Butteweg Canyon just above border trail, Tijuana River watershed. Canyon bottom along stream course. 167 Comment
  SEINET7419066 Image available Chaenactis douglasii var. douglasii J. Robertson, Y. Robertson 1979-7-18 s.n. Mono North side of South Fork of Sweetwater Cr. 2990 Comment
  RSA542246  Chaenactis glabriuscula var. glabriuscula Fred M. Roberts 1988-3-15 3872 Orange Rancho Mission Viejo: Central Gabino Canyon, 7km E Playa Survey Marker, 162 Comment
  RSA542427  Chaenactis glabriuscula var. glabriuscula Fred M. Roberts 1988-4-11 3901 Orange Lomas De Santiago; Loma Ridge, Upper Limestone Canyon, c.a. 3.2 km NNW Bolero Lookout Comment
  SD256406  Chaenactis glabriuscula var. glabriuscula Jim Roberts, Abbyann Sisk 2015-3-14 101 San Diego Fallbrook; Gird Valley Preserve; just W of golf course; 0.21 miles SW of junction Gird Road and Casablanca Way; low ridge south edge of borrow pit 138 Comment
  UCR209359  Chaenactis glabriuscula var. glabriuscula Fred M. Roberts, D. E. Bramlet, Megan Lulow 2008-4-4 6845 Orange Lomas de Santiago, Loma Ridge, at Calochortus Ridge near East Lomas Ridge Road, 0.7 km east of Bee Peak, Irvine Ranch Conservancy 509 Comment
  RSA588785  Chaenactis glabriuscula var. glabriuscula Fred M. Roberts, D. Bontrager 1990-4-18 4577 Orange Rancho Mission Viejo: Chiquita Rdge, west of Canada Chiquita, 2.0 km N Median Rancho Survey Marker 152 Comment
  UCR128551  Chamaebatia australis Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5817 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.5 mi. WSW of peak 2242, south of peak 1517 396 Comment
  RSA542538  Chamaesyce polycarpa var. polycarpa Fred M. Roberts 1988-5-13 3968 Orange Lomas de Santiago: Loma Ridge, Upper Limestone Canyon near spring, 2.3 km NW Bolero Lookout. 439 Comment
  UCR242704  Chasmanthe floribunda Fred M. Roberts 2010-2-12 7174 Orange South Coast; San Joaquin Hills, Niguel Hill, Laguna Niguel, Sea View Park, 0.2 km WNW summit of Niguel Hill 251 Comment
  UCSB51642  Cheilanthes clevelandii Roberts, Fred 1984-3-22 Santa Barbara Santa Cruz Island, canyon 2.3km WNW of Diablo Peak, 0.6km NE of Bench Mark 1697 370 Comment
  RSA731927  Chenopodium album Fred M. Roberts, Sandy Leatherman 2007-11-27 6683 Orange Yorba Linda: drainage channel on east side of Amberdale Dr. ca. 0.3 km S Fairmont Blvd. 118 Comment
  IRVC21735  Chenopodium ambrosioides Fred M. Roberts 1984-10-18 1423 Orange San Juan Canyon, 2.5km ENE San Juan Guard Station; 4.0km WNW Sitton Peak, Santa Ana Mountains 310 Comment
  IRVC24288  Chenopodium ambrosioides Fred M. Roberts, G. A. Marsh 1985-10-26 2512 Orange Santa Ana River: adjacent to Huntington Beach; 0.7km SSW Adams Street bridge. southern coastal 4 Comment
  RSA0027426  Chenopodium ambrosioides Fred M. Roberts 2013-7-18 7668 Orange San Joaquin Hills: Newport Beach, Buck Gully, west end, just east of north terminus of Poppy Street and 2.2 km WNW summit of Pelican Hill. 39 Comment
  RSA712937  Chenopodium ambrosioides Fred M. Roberts 2005-10-3 6302 Orange San Juan Capistrano: San Juan Creek wash, La Novia Road Bridge to 100m E of bridge, 1.4km E Mission San Juan Capistrano. 27 Comment
  UCR189546  Chenopodium ambrosioides Fred M. Roberts, S. Leatherman 2007-9-19 6583 Riverside Santa Ana Canyon, Santa Ana River, across from Green River Golf Course, 0.15 km W of Green River Road bridge 128 Comment
  IRVC22549  Chenopodium californicum Fred M. Roberts 1985-5-1 1705 Orange Aliso Canyon, 2.1km NNE Aliso Peak, Aliso Viejo 67 Comment
  RSA678739  Chenopodium californicum Fred M. Roberts, Carol A. Roberts, Robert Allen 2003-5-11 5856 Orange Dana Point Headlands: 0.8km SSW Richard Henry Dana School north of Marguerita Drive 76 Comment
  RSA687520  Chenopodium californicum Fred M. Roberts, D. E. Bramlet 2003-4-10 5648 Orange Rancho Mission Viejo: Donna O Neill Land Conservancy, ridge between Cristianitos Cyn. and Segunda Deshecha Canada, 1.54km W Gato Gate and 1.59km NW Edison substation. 262 Comment
  RSA749307  Chenopodium californicum Fred M. Roberts, Linda Farley 2008-3-28 7035 Orange Santa Ana Mtns.: Upper Weir Cyn., east fork along ridge just west of SR241, 3.4 km E Robber s Peak, Irvine Land Conservancy. 437 Comment
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Mar 23 2020
  UCD98119  Chenopodium californicum Warren Roberts 1963-4-10 22 Monterey Roberts Valley Ranch, 4 miles north of Carmel Valley Post Office. 457 Comment
  SD242574  Chenopodium macrospermum Fred Roberts 2011-9-9 7470 San Diego San Marcos: Universal Boot parcel, along north side of San Marcos Blvd. about 150 meters W jct. South Los Posas Rd. San Marcos USGS 7.5min Quad. 160 Comment
  RSA731958  Chenopodium murale Fred M. Roberts, Sandy Leatherman 2007-11-27 6698 Orange Yorba Linda: drainage channel on east side of Amberdale Dr. ca. 0.3 km S Fairmont Blvd. 118 Comment
  RSA752040  Chenopodium murale Fred M. Roberts 2008-3-27 6808 Orange Dana Point: Dana Point Headlands, CNLM Preserve near NE Gate, 0.5km W Marine Institute (Dana Point Harbor). 75 Comment
  UCR233744  Chlorogalum pomeridianum Fred M. Roberts 2008-6-12 7045 Orange Santa Ana Mtns. Foothills, Lomas de Santiago; Loma Ridge, along 'Calochortus Ridge' near West Loma Ridge Road north of Haul Road, 2.6 km NW of Bee Peak, Irvine Ranch Land Conservancy 417 Comment
  UCSB50639  Chlorogalum pomeridianum Roberts, Fred 1982-7-7 Orange South Laguna; Niguel Hill, 1.4 km. ESE Aliso Peak; 2.6 km. SSW Niguel Fire Station 207 Comment
  RSA701969  Chlorogalum pomeridianum var. pomeridianum Fred M. Roberts, David E. Bramlet 2003-6-20 5928 B Orange Rancho Mission Viejo: Donna ONeil Land Conservancy, Cristianitos Cyn., along Shady Canyon Trail, 84 meters N Sycamore Gate and 50 meters W Cristianitos Rd. 101 Comment
  UCSB34460  Chorizanthe brevicornu var. brevicornu Roberts, Fred 1980-6-1 Inyo West of and near Trona-Wildrose Road, 14.5 km. north of Trona 199 Comment
  IRVC28104  Chorizanthe fimbriata Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5772 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  UCR211705  Chorizanthe polygonoides subsp. longispina Fred M. Roberts, Kerry M. Byrne 2006-5-4 6339 Riverside Perris-Agunaga Basin, West Hemet Hills, 3.2 km west of the west end runway at Hemet Ryan Airport and 1.3 km east-northeast of the junction of Stowe and Winchester Roads 508 Comment
  RSA747627  Chorizanthe procumbens Fred M. Roberts 2008-5-16 6973 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 65 Comment
  SD135291  Chorizanthe procumbens Fred M. Roberts 1993-4-24 4856 San Diego Carlsbad, Arroyo la Costa, just north of Mission Estancia Road, 5.2 km SW of Lake San Marcos dam, occasional on gentle hillside in opening of southern maritime chaparral along dirt road in sand (IPB 3/06) 73 Comment
  UCSB52868  Chorizanthe procumbens Roberts, Fred 1983-4-24 Orange 0.5km W Dana Point Harbor; 0.8km SSW Richard Henry Dana School 82 Comment
  UCSB54286  Chorizanthe rigida Roberts, Dar 1984-4-28 Mono 2.7 miles S of Rocked-in-Spring on E side of slough at BLM Spring in shadscale scrub; Fish Slough: a desert wetland system 4.5 mi. N of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis 1274 Comment
  UCSB34461  Chorizanthe rigida Roberts, Fred 1980-6-1 Inyo West and near Trona-Wildrose Road, 14.5 km. North of Trona. 655 Comment
  RSA542527  Chorizanthe staticoides Fred M. Roberts, Kathy Keane 1988-5-25 3992 Orange Rancho Mission Veijo: Lower Canada Chiquita, 2.0 kilometers SSE Medium Rancho Survey Marker. 91 Comment
  RSA542529  Chorizanthe staticoides Fred M. Roberts, Kathy Keane 1988-5-26 4008 Orange Rancho Mission Viejo: tributary to Trampas canyon, along Christianitos rd., 2.4 km ESE Viejo Survey mark. 128 Comment
  RSA542530  Chorizanthe staticoides Fred M. Roberts 1987-3-30 3325 Orange Lomas De Santiago: Lomas Ridge, east fork Upper Serrano Canyon, 3.1k SE Bolero Lookout. 394 Comment
  RSA587875  Chorizanthe staticoides Fred M. Roberts 1990-5-10 4626 Orange Rancho Mission Viejo: Lower Talega Canyon, TRW Lease Holding, c.a. 4.8km NE Clemente Survey Marker. 122 Comment
  RSA588786  Chorizanthe staticoides Fred M. Roberts, Kathy Keane 1990-4-18 4576 Orange Rancho Mission Viejo: Chiquita Rdge, west of Canada Chiquita, 2.0 km N Median Rancho Survey Marker 152 Comment
  SD135292  Chorizanthe staticoides Fred M. Roberts 1993-4-24 4863 San Diego Carlsbad: Arroyo la Costa, 5.3 km SW San Marcos Lake dam, just north of west end of Mission Estancia Road locally common on west-facing slope on sandstone barren in disturbed mixed grassland and chaparral in sandy soil 64 Comment
  RSA0015956  Chorizanthe staticoides subsp. chrysacantha Fred M. Roberts 2012-5-10 7566 Orange San Joaquin Hills: Buck Gully, south tributary, north slope Pelican hill, just north of Pelican Hills Drive, 0.7 km N Pelican Hill summit. 154 Comment
  UCSB34468  Chorizanthe watsonii Roberts, Fred 1980-6-1 Inyo Near Haiwee Reservoir, on east side of Hwy. 395, 51 km. north of Junction 14. 352 Comment
  UCSB34458  Chorizanthe xanti Roberts, Fred 1980-5-31 Ventura On west side of HWY 33, 6.4 km. by road S of Pine Mountains Summit 1433 Comment
  UC1548625  Cirsium mohavense D. A. Roberts 1983-7-23 FS 80 Inyo 2 mi n of jct of Fish Slough Rd and Jean Blanc Rd. (Red Willow Dam area, n end of Owens Valley); Fish Slough, Owens Valley, Red Willow Dam 1274 Comment
  RSA0069236  Cirsium occidentale var. occidentale Fred M. Roberts, Lee Ann Caranza 2009-4-7 7141 Orange Dana Point Headlands: Dana Point CNLM Preserve, 0.8 km WNW Dana Point Marine Institute at Dana Point Harbor. 60 Comment
  RSA773518  Cirsium occidentale var. occidentale Fred M. Roberts 1999-5-3 5208 Orange Lomas de Santiago: Loma Ridge, Central Limestone Canyon, west slope, 2.3 km NW Bolero Lookout and 0.5 km NE Bolero Spring 446 Comment
  RSA773523  Cistanthe monandra Fred M. Roberts 1999-5-14 5214 Orange Peninsular Ranges; Santa Ana Mts.: Lomas de Santiago, Loma Ridge; Upper Limestone Canyon on slopes above Bolero Spring, 2.4 km NNW Bolero Lookout 451 Comment
  UCSB48213  Clarkia bottae Roberts, Fred 1981-5-3 Orange Santa Ana Mtns; Hot Springs Canyon; 1.1km NNE San Juan Guard Station; near base of San Juan Trail 264 Comment
  UCSB52914  Clarkia bottae Roberts, Fred; Marsh, K. 1983-5-13 Orange San Joaquin Hills, Laguna Canyon along Laguna Canyon Road; 1.7km N Thurston School; 6.4km SE Signal Peak 50 Comment
  RSA553113  Clarkia bottae Fred M. Roberts 1989-5-11 4344 Orange Santa Ana Mountains: Upper Blind canyon, east fork, along power line maintainance road, 3.9km SE Walnut Reservoir. 381 Comment
  POM271808  Clarkia purpurea subsp. purpurea Cody Robertson 1938-5-8 s.n. Kern White Wolf grade; east of Arvin. 457 Comment
  SD185853  Claytonia perfoliata subsp. mexicana Laurie Roberts, Lane McClelland 2006-5-2 8 San Diego Descanso. Just N of I-8, ca. 1 1/3 mi E of its intersection with SR-79. 1098 Comment
  IRVC28449  Clematis pauciflora Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5721 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  SD233914  Clematis pauciflora Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5721 San Diego Peninsular Range, San Ysidro Mountains: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed (Otay Mtn. 7.5' Q) 167 Comment
  SD256635  Clematis pauciflora Jim Roberts, T. Chester, N. Accola, A. Ballway 2015-3-16 121 San Diego Fallbrook; Gird Valley Preserve; NW of borrow pit; just W of golf course; 0.26 miles W of junction Gird Road and Casablanca Way; middle ridge. 141 Comment
  UCR128407  Clematis pauciflora Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5721 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  UCSB48083  Clematis pauciflora Roberts, Fred 1981-4-12 Orange Santa Ana; San Juan Canyon, Hwy 74 2.0km by road SW San Juan Guard Station; 2.7km SW Juan Rancho Survey Mark 210 Comment
  RSA752037  Cleome isomeris Fred M. Roberts 2008-3-27 6812 Orange Dana Point: Dana Point Headlands, CNLM Preserve near Outlook 1, 0.5km W Marine Institute (Dana Point Harbor). 45 Comment
  UCSB53322  Cleomella brevipes Roberts, Dar 1983-7-22 Mono Fish Slough: desert wetland system 4.5 mi. north of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis; 30 m. north of pupfish refuge on second dirt rd. paralleling the fence, NW end of slough 1341 Comment
  UC1548548  Cleomella obtusifolia D. A. Roberts 1983-7-23 FS 55 Inyo 1 mi n Fish Slough Rd. jct. with Jean Blanc Rd. (at barrier separating slough from Owens River canal, 4.5 mi n of Bishop, n end of Owens Valley); Owens Valley, Fish Slough 1274 Comment
  UCSB53324  Cleomella parviflora Roberts, Dar 1983-7-22 Mono Fish Slough: desert wetland system 4.5 mi. north of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis; 30 m. north of pupfish refuge on second dirt rd. paralleling the fence, NW end of slough 1341 Comment
  RSA492390  Cleomella plocasperma D. Roberts 1983-7-22 FS- 30 Mono 20 miles E of BLM Spring, on east side of fence. Fish Slough (a desert wetland system 4.5 miles N of Bishop at the northern end of Owens Valley; study site includes 14 sq. miles along a 7 mile drainage axis.) Comment
  UC1548528  Cleomella plocasperma D. Roberts 1983-7-22 FS 30 Mono 20 m e BLM Spring (on e side of fence, 4.5 mi w of Bishop, Fish Slough, n end of Owens Valley); Owens Valley, Fish Slough 1274 Comment
  UCSB53315  Cleomella plocasperma Roberts, Dar 1983-7-22 Mono Fish Slough: desert wetland system 4.5 mi. north of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis; 20 m. east of BLM Spring; on east side of fence 1341 Comment
  UCSB48362  Clinopodium chandleri Roberts, Fred 1982-4-18 Orange Santa Ana Mtns.: Upper Hot Springs Cyn., 0.1 km SW Falcon Group Camp; 2.0 km SE Los Pinos Peak 1075 Comment
  RSA590957  Cneoridium dumosum Fred M. Roberts Jr., Karlin G. Marsh 1991-4-10 4767 Orange Laguna Beach: South Laguna, Temple Hill, ridge between Upper Hobo Canyon and Aliso Gorge, 1.7km NW Niguel Hill summit. 219 Comment
  UCSB48359  Cneoridium dumosum Roberts, Fred 1982-6-30 Orange Laguna Niguel: Pacific Island Dr., Niguel Hill, 2.0km SE Aliso Peak; 1.3km E Bench Mark 133 39 Comment
  UCR128393  Collinsia heterophylla Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5725 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  SD233986  Collinsia heterophylla var. heterophylla Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5725 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed. Canyon bottom along stream course. 167 Comment
  UCSB48210  Collinsia heterophylla var. heterophylla Roberts, Fred 1981-5-3 Orange Hot Springs Canyon; 1.3km NNE San Juan Guard Station; Santa Ana Mtns 276 Comment
  RSA0117395  Collinsia parryi Fred M. Roberts, Robert L. Allen, Chris Barnhill 2003-4-26 5662 Riverside Upper San Juan Canyon, along San Juan Loop Trail, 0.8 km NNW Upper San Juan Campground. 520 Comment
  RSA0029945  Comarostaphylis diversifolia subsp. diversifolia Fred M. Roberts, Sandra Leatherman 2013-2-13 7719 Orange Santa Ana Mountains: Ridge south of central Santiago Canyon, near Joplin Trail, 3.7 km SE Modjeska (town). 792 Comment
  RSA594812  Comarostaphylis diversifolia subsp. diversifolia Fred M. Roberts 1993-3-11 4881 Orange Laguna Beach: South Laguna , Upper Hobo Canyon, 1.4 km NNW Aliso Peak. 201 Comment
  RSA467066  Comarostaphylis diversifolia subsp. planifolia Dar A. Roberts 1982-3-24 s.n. Santa Barbara Santa Cruz Island. 0.9 km northeast of Devils Peak, 530 Comment
  SBBG55068  Comarostaphylis diversifolia subsp. planifolia D. Roberts 1982-3-24 Santa Barbara 0.9 km NE of Devil's Pk 530 Comment
  UCSB42753  Comarostaphylis diversifolia subsp. planifolia Roberts, Dar 1982-3-24 Santa Barbara 0.9 km. northeast of Devils Peak, Santa Cruz Island 530 Comment
  UCSB51645  Comarostaphylis diversifolia subsp. planifolia Roberts, Fred 1984-3-22 Santa Barbara Santa Cruz Island; Upper Cuesta Valdez area, 2.6 km. WNW Diablo Peak; 0.5 km. N Bench Mark 1697 395 Comment
  UCSB52879  Comarostaphylis diversifolia subsp. planifolia Roberts, Fred 1983-4-7 Orange Laguna Niguel; Niguel Hill, above Pacific Island Road, 1.7 km. SE Aliso Peak; 3.0 km. SSW Alicia Fire Station 239 Comment
  IRVC20432  Comarostaphylis diversifolia var. diversifolia Fred M. Roberts 1983-4-7 977 Orange Niguel Hill, above Pacific Island Dr., 1.7km SE Aliso Peak, 3.0km SSW Alicia Fire Station, Laguna Niguel 239 Comment
  IRVC21613  Comarostaphylis diversifolia var. diversifolia Fred M. Roberts 1984-3-31 1317 Orange Niguel Hill, 1.0km ENE Aliso Peak, 2.1km SW Alicia Fire Station, Laguna Niguel 275 Comment
  IRVC22479  Conium maculatum Fred M. Roberts 1985-4-24 1655 Orange Laguna Beach; Laguna Canyon on Laguna Canyon Rd., 0.7km N jct. El Toro Rd. Southern Coastal 76 Comment
  IRVC23323  Conium maculatum Fred M. Roberts 1985-7-23 2078 Orange Irvine; San Diego Creek at Jeffrey Rd. bridge. Southern Coastal 35 Comment
  CHSC59713  Convolvulus arvensis Rod Robertson 1979-4-9 15 Santa Clara West side of creek, West Valley College campus, Saratoga. 60 Comment
  RSA0013914  Convolvulus arvensis Fred M. Roberts 2012-5-10 7582 Orange San Joaquin Hills: Buck Gully, south tributary, north slope Pelican Hill, just north of Pelican Hills Drive, 0.7 km N Pelican Hill summit. 154 Comment
  SD187856  Convolvulus arvensis Laurie Roberts, Lane McClelland 2006-5-29 28 San Diego Descanso. NW base of Guatay peak, along Old Highway 80, just NE of its intersection with SR- 79. 1110 Comment
  RSA0127343  Convolvulus simulans Fred M. Roberts 2016-4-29 8046 Orange Lomas de Santiago: north of Santiago Canyon Road, southwest slope of hill marked 1332 on topo maps, just west of Irvine Lake, 1.6 km S Irvine Lake dam spillway and 0.8 km NW Irvine Lake Park. 335 Comment
  RSA0127597  Convolvulus simulans Fred M. Roberts, Jutta Burger 2016-3-22 8027 Orange Lomas de Santiago: west of Irvine Lake and north of Santiago Canyon Road, south slopes of Hill 1322, 2.0 km S Irvine Lake Dam spillway and 0.9km W Irvine Lake Park. 271 Comment
  RSA610239  Convolvulus simulans Fred M. Roberts, Tony Bomkamp 1997-3-13 4982 Orange Rancho Mission Viejo: Christianitos Canyon, 4 km ESE Viejo Survey Mark. 5 Comment
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Oct 20 2011
  RSA730987  Conyza bonariensis Fred M. Roberts 2006-11-15 6461 Orange Santa Ana Cyn., 1.0 km ENE Imperial Hwy bridge, between La Palma Ave. and Santa Ana River near Big Springs St. 89 Comment
  UCR211725  Conyza bonariensis Fred M. Roberts, Ileene Anderson 2005-5-20 6207 Riverside Perris Basin, San Jacinto Valley, field 0.5 km west of Sanderson Road, 3.2 km southwest of Gilman Hot Springs 446 Comment
  RSA0036109  Conyza canadensis Fred M. Roberts, Carol A. Roberts 2008-9-28 7113 Orange Dana Point: Dana Point Headlands, CNLM Preserve near NE Gate, 0.5km W Marine Institute (Dana Point Harbor) 75 Comment
  RSA703881  Conyza canadensis Fred M. Roberts, David E. Bramlet 2004-11-5 6078 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, tributary to Cristianitos Cyn., 0.14 km NNW Sycamore Gate and 0.10 km W Cristianitos Rd. 110 Comment
  RSA743521  Conyza canadensis Fred M. Roberts, Carol A. Roberts 2008-9-28 7113 Orange Dana Point: Dana Point Headlands, CNLM Preserve near NE Gate, 0.5 km W Marine Institute (Dana Point Harbor). 75 Comment
  IRVC23904  Conyza coulteri Fred M. Roberts 1985-8-19 2127 Orange Mission Viejo: lateral to Engilish Canyon along Vista de Lago Drive; 3.4km ENE El Toro Fire Station. Southern Coastal 218 Comment
  IRVC24188  Conyza coulteri Fred M. Roberts 1985-9-17 2264 Orange Irvine; lot between Walnut Avenue, Harvard Avenue and Peter's Creek Channel. southern coastal 20 Comment
  IRVC24224  Conyza coulteri Fred M. Roberts 1985-10-1 2292 Orange Silverado Canyon, Silverado Canyon Road, 1.0km by road E junction Santiago Canyon Road. Santa Ana Mountains 320 Comment
  UCR224167  Conyza coulteri Fred M. Roberts, Carol A. Roberts 2008-9-28 7111 Orange South Coast, Dana Point, Dana Point Headlands, CNLM Preserve near northeast Gate, 0.5 km west Marine Institute, Dana Point Harbor 75 Comment
  UCR241916  Conyza coulteri Fred M. Roberts, Lee Ann Caranza 2009-9-23 7162 Orange Southern Coastal Plain, Dana Point, Dana Point Headlands, CNLM Dana Point Preserve, old Marguerite Road bed just west of the Nature Center and just east of the terminus of Dana Strands Road, 0.7 km west pier, Dana Point Harbor 73 Comment
  UCR128547  Cordylanthus rigidus Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5774 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 427 Comment
  RSA0084754  Cordylanthus rigidus subsp. setiger Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5774 San Diego San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242. 427 Comment
  UCR239652  Coreopsis gigantea Fred M. Roberts 2012-5-4 7546 Orange San Joaquin Hills, Buck Gully, along San Joaquin Hills Road, just west of Harbor Watch Park, 2.9 km west of Signal Peak 174 Comment
  UC101078  Corethrogyne filaginifolia Rev. Geo. Robertson 121 San Bernardino San Bernardion Mts., Forest Home, Mill Creek Canyon San Bernardino Mts., Forest Home, Mill Creek Canyon 1676 Comment
  UCSB52401  Corethrogyne filaginifolia Roberts, Fred 1982-9-15 Orange Rancho Mission Viejo; Rte. 74, 6.6 km. by road ENE San Juan Capistrano; 0.9 km. Viejo Peak 93 Comment
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Jan 25 2020
  UCSB52942  Corethrogyne filaginifolia Roberts, Fred 1983-11-4 Orange Santa Ana Mtns.; between Flacon and Blue Jay campgrounds; along Main Divide Truck Trail, 2.1 km. ESE Los Pinos Peak 1090 Comment
  SD242433  Corethrogyne filaginifolia var. incana Fred Roberts 2011-6-24 7452 San Diego Point Loma; Cabrillo Memorial Drive, about 0.3 km S jct. Woodward Dr., across from Fort Roscrans Military Cemetary, Point Loma USGS 7.5min quad, UTM 11S 04 76 965mE, 36 17 430mN. 103 Comment
  RSA703091  Corethrogyne filaginifolia var. virgata Fred M. Roberts, Arthur Davenport 2003-9-11 6004 Orange Rancho Mission Viejo: Donna O' Neill Land Conservancy. Cristianitos Cyn., 0.79 km N Sycamore Gate 0.23 km w of Crisianitos Road. 126 Comment
  RSA743452  Corethrogyne filaginifolia var. virgata Fred M. Roberts 2008-7-10 7072 Orange Dana Point: Dana Point Headlands, CNLM Preserve, along north slopes above Dana Strand Beach, 0.8km WNW Marine Institute, Dana Point Harbor. 45 Comment
  UCR224157  Corethrogyne filaginifolia var. virgata Fred M. Roberts 2008-7-10 7072 Orange South Coast, Dana Point Headlands, CNLM Preserve, along north slopes above Dana Strand Beach, 0.8 km west norhwest of Marine Institute, Dana Point Harbor 45 Comment
  IRVC24483  Cortaderia selloana Fred M. Roberts, G. A. Marsh 1986-2-28 2603 Orange Lateral to English Canyon along Vista Del Lago; 3.4km ENE El Toro Fire Station, in ravine at base of north-facing slope. Mission Viejo 236 Comment
  UCSB52470  Cotula australis Roberts, Fred 1983-3-10 Orange Dana Point Headlands; cliff above Dana Point Harbor, south of old Cove Rd.; 0.8 km. S Richard Henry Dana School 60 Comment
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Jan 25 2020
  UCSB38431  Cotula australis Roberts, D.; Fletcher, Martin 1981-3-23 Santa Barbara Above Central Valley, 1 km. north of Field Station, Santa Cruz Island 213 Comment
  RSA699758  Crassula connata Fred M. Roberts, D. E. Bramlet 2003-5-15 5867 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, tributary to Cristianitos Cyn., 1.68km SW Gato Gate and .24km NW of SDG&E substation. 116 Comment
  RSA751982  Crassula connata Fred M. Roberts 2008-3-27 6803 Orange Dana Point: Dana Point Headlands, CNLM Preserve near NE Gate, 0.5km W Marine Institute (Dana Point Harbor). 75 Comment
  UCR128855  Crassula connata Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5805 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 470 Comment
  UCSB47623  Crassula connata Roberts, Fred 1980-4-3 Orange Hills; 1.0 km. NE Dana Hills High School, Dana Point 75 Comment
  RSA542643  Crassula connata var. erectoides Fred M. Roberts, Dar A. Roberts 1989-3-22 4219 Orange Aliso-Wood Canyons Regional Park: Wood Canyon, 3.6 km S Moulton Peak. 43 Comment
  SEINET7837019 Image available Crepis acuminata J. Robertson, Y. Robertson 1979-7-20 s.n. Mono Masonic Hills, 5.9 mi. from Hwy 182; 2.4 mi. from NF boundary 2499 Comment
  IRVC25205  Cressa truxillensis Fred M. Roberts 1986-11-4 3198 Orange Anaheim Bay, north of Hog Island, Seal Beach Naval Weapons Station 0 Comment
  RSA0093742  Cressa truxillensis Fred M. Roberts 2014-4-21 7848 Orange South Coast. SAN JOAQUIN HILLS: Laguna Lake 1 (Upper Laguna Lake), south basin. 113 Comment
  RSA0011252  Croton californicus Fred M. Roberts, Lee Ann Caranza 2006-10-25 6454 Orange Dana Point Headlands south of Margarite Drive, 0.6km W Marine Institute and 1km SW Cook Sch. 58 Comment
  RSA0011253  Croton californicus Fred M. Roberts, Sandy Leatherman 2007-11-27 6670 Orange Yorba Linda: Santa Ana Canyon, Santa Ana River wash, S of E La Palma Road near Via Lomas de Yorba Linda, about 0.6 km W Gypsum Cyn. bridge. 113 Comment
  RSA0073651  Croton californicus Fred M. Roberts 2010-3-12 7185 Orange Southeast Coast: Dana Point Headlands: Harbor Point Park, South of Green Lantern and west of Dana Point Harbor, c.a. 150 meters SE Interpretive Center. 50 Comment
  UCSB47973  Croton californicus Roberts, Jr., Fred 1980-2-17 Orange Along north side of Dana Strand Road, on the bluffs west of Dana Mrina, Dana Point 56 Comment
  RSA0011251  Croton californicus Fred M. Roberts Jr. 1989-5-9 4340 Orange Santa Ana Mts: Gypsum Canyon, west fork, 5.6 km WNW Sierra Peak, c.a. 1 km S Highway 91. 146 Comment
  RSA715703  Croton setiger Fred M. Roberts, Robert L. Allen 2005-10-15 6314 Orange entrance to Falcon Group Camp, 2.1km ESE Los Pinos Peak and 0.3km NE campground. 1008 Comment
  SD192505  Croton setiger Fred Roberts, Carol A. Roberts 2006-10-15 6448 San Diego Miramar Marine Corps Air Station: Rose Cyn., south of Miramar Way between Schilt Rd. and Obregon Ave. 135 Comment
  UCSB48014  Croton setiger Roberts, Fred 1980-9-14 Orange Santa Ana Mtns.; San Juan Canyon, 0.6 km. SW Lower San Juan Picnic Ground; 1.9 km. WNW Sitton Peak 410 Comment
  UCSB52909  Croton setiger Roberts, Jr., Fred 1984-8-14 Orange Santa Ana Mtns.; Chiquito Basin Trail, ridge between Chiquito Basin and Lion Canyon, 2.6 km. SSE Los Pinos Peak; 1.3 km. SSW Blue Jay Campground 885 Comment
  RSA678720  Crypsis schoenoides Fred M. Roberts, Michelle Lee 2001-6-29 5505 Orange Rancho Mission Veijo: Chiquita Ridge, 0.3km WnW Rancgo Macian Survey Marker. PCR Vernal Pool 4., (33 33'11N,117 37' 18 W; T7S R7W, NW 1/4sec 21) 226 Comment
  UCR281024  Cryptantha barbigera Fred M. Roberts 2016-3-5 8000 Riverside Sonoran (Colorado) Desert, Little Maria Mountains: shallow canyon at west end, 4.3 km east of Palen Pass and 2.0 km WNW Peak "602" 116 Comment
  UCSB52443  Cryptantha barbigera Roberts, Fred 1982-5-15 San Bernardino Midhills: Cedar Canyon, Cedar Canyon Rd., 9.7km by E. jct. Cima-Kelso Rd. 1591 Comment
  RSA0073640  Cryptantha clevelandii Fred M. Roberts 2010-3-12 7179 Orange Southeast Coast: DANA POINT HEADLANDS: Harbor Point Park, South of Green Lantern and west of Dana Point Harbor, c.a. 150 meters SE Interpretive Center. 50 Comment
  UCR209386  Cryptantha clevelandii Fred M. Roberts 2008-3-19 6782 Orange South Coast, Dana Point Headlands, Center for Natural Lands Mgmt. Preserve, 0.8 km west of the Marine Institute, Dana Point Harbor 45 Comment
  JROH1358  Cryptantha flaccida Robert Robertson 1954-4-23 92 San Mateo Jasper Ridge Biological Preserve, Stanford University Comment
  IRVC28059  Cryptantha intermedia Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5769 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  RSA542657  Cryptantha intermedia Fred M. Roberts 1988-4-10 3902 Orange Lomas De Santiago: Loma Ridge, Upper Limestone Canyon, c.a. 3.2 kilometer NNW Bolero Lookout. 347 Comment
  RSA678721  Cryptantha intermedia Fred M. Roberts, Robert Allen, Carol Roberts 2003-5-11 s.n. Orange Dana Point Headlands: 0.8km SSW Richard Henry Dana School north of Marguerita Drive 76 Comment
  RSA687518  Cryptantha intermedia Fred M. Roberts, D. E. Bramlet 2003-4-10 5651 Orange Rancho Mission Viejo: Donna O Neill Land Conservancy, ridge between Cristianitos Cyn. and Segunda Deshecha Canada, 1.54km W Gato Gate and 1.59km NW Edison substation. 262 Comment
  SD233968  Cryptantha intermedia Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5769 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242. 427 Comment
  UCR280920  Cryptantha maritima Fred M. Roberts 2016-3-5 7995 Riverside Sonoran (Colorado) Desert, Little Maria Mountains: shallow canyon at west end, 4.3 km east of Palen Pass and 2.0 km WNW Peak "602" 116 Comment
  RSA0127598  Cryptantha microstachys Fred M. Roberts, Diane Etchison 2016-3-22 8028 Orange Lomas de Santiago: west of Irvine Lake and north of Santiago Canyon Road, southeastern slope of Hill 1332 near toe of slope, about 1.9km S Irvine Lake Dam spillway. 263 Comment
  RSA542659  Cryptantha microstachys Fred M. Roberts, K. Keane 1988-5-26 4005 Orange Rancho Mission Viejo: tributary to Trampas canyon, along Christianitos rd., 2.4 km ESE Viejo Survey mark. 128 Comment
  RSA749491  Cryptantha microstachys Fred M. Roberts, Linda Farley 2008-3-28 6825 Orange Santa Ana Mtns.: Upper Weir Cyn., Irvine Ranch Conservancy, 3.3 km ENE Robbers Peak on ridge north of canyon. 427 Comment
  UCR209382  Cryptantha microstachys Fred M. Roberts, Linda Farley 2008-3-28 6825 Orange Santa Ana Mountains, Upper Weir Canyon, Irvine Ranch Conservancy, 3.3 km east-northeast of Robbers Peak on ridge north of canyon 427 Comment
  SD233969  Cryptantha muricata var. jonesii Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5787 San Diego Peninsular Range, San Ysidro Mrns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242. 427 Comment
  UCR280921  Cryptantha nevadensis Fred M. Roberts 2016-3-5 7996 Riverside Sonoran (Colorado) Desert, Little Maria Mountains: shallow canyon at west end, 4.3 km east of Palen Pass and 2.0 km WNW Peak "602" 116 Comment
  UCR280918  Cryptantha pterocarya var. cycloptera Fred M. Roberts 2016-3-5 7993 Riverside Sonoran (Colorado) Desert, Little Maria Mountains: shallow canyon at west end, 4.3 km east of Palen Pass and 2.0 km WNW Peak "602" 116 Comment
  UCR247894  Cucurbita foetidissima Fred M. Roberts 2012-7-18 7659 Orange SAN JOAQUIN HILLS: Newport Beach, Buck Gully, along Buck Gully Trail, about 0.7 km from the north terminus of Poppy Street and 1.8 km WNW summit of Pelican Hill 52 Comment
  RSA730999  Cupressus forbesii Fred M. Roberts, B. Allen, D. Olsen 2007-1-19 6502 Orange Beek s Place along Main Divide Rd., 4.1 km NW Pleasant Peak. 852 Comment
  CHSC59934  Cupressus guadalupensis Warren Roberts; Bill Sacks 1981-1-15 Yolo Northeast of Mrak Bridge, section V A of Arboretum, University of California, Davis. Comment
  UCR258625  Cuscuta campestris Fred M. Roberts 2014-7-25 7890 Orange South Coast, SAN JOAQUIN HILLS: Upper Laguna Canyon, Laguna Lake 1 (Upper Laguna Lake), north basin, c.a. 5.1 kn ENE summit Signal Hill. Laguna Coast Wilderness Park 113 Comment
  RSA0014999  Cuscuta subinclusa Fred M. Roberts, D. E. Bramlet 2008-5-13 6958 Orange Lomas de Santiago: Loma Ridge, north end, west of Sheriff Rd., 1.4 km SE Peters Canyon Reservoir dam. Irvine Ranch Conservancy. 263 Comment
  RSA716729  Cuscuta subinclusa Fred M. Roberts 2004-8-21 6100 Orange Santa na Mtns.: Hot Springs Cyn., Hot Springs Cyn. Rd., c.a. 0.8km by road N jct. SR 74; 0.7km NNW Juan Rancho Survey Mark. 255 Comment
  RSA716731  Cylindropuntia prolifera Fred M. Roberts, D. E. Bramlet 2004-11-5 6129 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, west slopes of Cristianitos Cyn., 0.79 km N Sycamore Gate and 0.18 km W Cristianitos Road. 146 Comment
  UCR224166  Cylindropuntia prolifera Fred M. Roberts, Carol A. Roberts 2008-9-28 7117 Orange South Coast, Dana Point, Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8 km west northwest of Marine Institute, Dana Point Harbor 65 Comment
  RSA0042531  Cynodon dactylon Fred M. Roberts 2013-5-30 7778 Orange Lomas de Santiago: Santiago Creek wash, at Santiago Canyon Road bridge (south side), 0.3km W jct. Silverado and Santiago Canyon Roads. 299 Comment
  SD193455  Cynodon dactylon Fred Roberts 2006-7-6 6361 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  RSA678728  Cynodon dactylon Fred M. Roberts, Michelle Lee 2001-6-29 5506 Orange Rancho Mission Veijo: Chiquita Ridge, 0.3km WnW Rancgo Macian Survey Marker. PCR Vernal Pool 4., (33 33'11N,117 37' 18 W; T7S R7W, NW 1/4sec 21) 226 Comment
  RSA0069227  Cyperus difformis Fred M. Roberts 2008-9-3 7082 Orange Yorba Linda: Santa Ana River Canyon, Santa Ana River, 0.7 km W Gypsum Cyn. bridge, south of La Palma Ave. 107 Comment
  RSA539371  Cyperus eragrostis Fred M. Roberts, D. Willick 1988-9-16 4136 Orange Peralata Hills: Oak Canyon Nature Center, Upper Walnut Canyon, 1.0 kilmeter N Robbers Peak. 180 Comment
  RSA599638  Cyperus eragrostis Fred M. Roberts, P. Barrett, G. Bastillos 1995-7-25 4967 Orange Santa Ana Mountains: San Juan Canyon along San Juan Creek, San Juan Hot Springs, 0.8 kilometer SSW Juan Rancho Survey Mark. 214 Comment
  UCSB48015  Cyperus eragrostis Roberts, Fred 1980-6-30 Orange Irvine: near east end of Veeh Reservoir; at corner of Ridgeroute and Peralta Rd. 92 Comment
  UCSB52418  Cyperus eragrostis Roberts, Fred; Marsh, K. 1982-10-18 Orange Laguna Beach: east flank of Temple Hill; along east margin of Top of the World School 295 Comment
  UCR188894  Cyperus erythrorhizos Fred M. Roberts, S. Leatherman 2007-9-19 6588 Riverside Santa Ana Canyon, Santa Ana River, across from Green River Golf Course, 0.15 km W of Green River Road bridge 128 Comment
  RSA594874  Cyperus erythrorhizos Fred M. Roberts, W. R. Ferren 1991-12-1 4829 Orange San Joaquin Hills: Laguna Canyon, Upper Laguna Lake, 3.5 kilometers N junction El Toro Road, 4.9 kilometers ENE Signal Peak. 113 Comment
  RSA725529  Cyperus esculentus Fred M. Roberts 2007-9-11 6573 Orange Aliso Viejo: tributary to Aliso Creek on west side of Moulton Pkwy., 0.2 km N Aliso Viejo Pkwy., adj. to Kinder Care Learning Center. 83 Comment
  RSA718966  Cyperus odoratus Fred M. Roberts, Robert L. Allen 2006-10-8 6414 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 0.3km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  UCR188896  Cyperus odoratus Fred M. Roberts, S. Leatherman 2007-9-19 6589 Riverside Santa Ana Canyon, Santa Ana River, across from Green River Golf Course, 0.15 km W of Green River Road bridge 128 Comment
  UCR189290  Cyperus odoratus Fred M. Roberts, S. Leatherman 2007-9-19 6595 Riverside Santa Ana Canyon, Santa Ana River, across from Green River Golf Course, 0.15 km W of Green River Road bridge 128 Comment
  SD242350  Cyperus rotundus Fred Roberts 2011-4-19 7409 San Diego Oceanside: Whelan Ranch, near 726 Point Arguello Road. 17 Comment
  RSA539378  Dactylis glomerata Fred M. Roberts 1988-6-9 4080 Orange Santa Ana Mountains: Modjeska Peak, 0.9km SW summit., 3730500mN, 449000mE 1542 Comment
  UCSB48221  Datisca glomerata Roberts, Fred 1981-6-22 Orange Santa Ana Mtns.: San Juan Canyon; 0.1 km. N Lower San Juan Picnic Ground 390 Comment
  RSA542375  Datura stramonium Fred M. Roberts Jr., Gordon Marsh 1987-8-31 3600 Orange Santa Ana River: adjacent to Santa Ana, 0.5 km NE 17th St. bridge. 27 Comment
  RSA743455  Datura wrightii Fred M. Roberts 2008-7-10 7075 Orange Dana Point: Dana Point Headlands, CNLM Preserve near Outlook 2, 0.7 km W Marine Institute (Dana Point Harbor). 52 Comment
  IRVC28109  Daucus pusillus Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5761 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  RSA542444  Daucus pusillus Fred M. Roberts, Kathy Keane 1988-5-26 4004 Orange Rancho Mission Viejo: tributary to Trampas canyon, along Christianitos rd., 2.4 km ESE Viejo Survey mark. 128 Comment
  RSA678736  Daucus pusillus Fred M. Roberts, Carol A. Roberts, Robert Allen 2003-5-11 5859 Orange Dana Point Headlands: hilltop, 0.6km SSW Richard Henry Dana School south of Pacific Coast Highway and north of Scenic Drive. 73 Comment
  CAS-BOT-BC300018  Deinandra corymbosa subsp. corymbosa Robert Robertson 1954-5-8 152 Monterey E. of Carmel Cove, Point Lobos 30 Comment
  RSA747715  Deinandra fasciculata Fred M. Roberts 2008-7-10 7064 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 65 Comment
  RSA749349  Deinandra fasciculata Fred M. Roberts 2008-4-22 6922 Orange Lomas de Santiago: Loma Ridge, Lower Hicks Cyn.,along Haul Rd. near asphalt plant, 2.2 km ENE Rattlesnake Reservoir dam and 2.2 km WNW Bee Peak, Irvine Ranch Conservancy. 188 Comment
  SD192278  Deinandra fasciculata Fred Roberts 2006-7-6 6371 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  RSA0073652  Deinandra paniculata Fred M. Roberts 2014-7-25 7882 Orange South Coastal Plain: San Joaquin Hills: Laguna Canyon, Nix Nature Center, Laguna Coast Wilderness Park, about 4.4 km E Signal Peak. 126 Comment
  RSA0073657  Deinandra paniculata Fred M. Roberts 2014-7-25 7893 Orange South Coastal Plain: San Joaquin Hills: Laguna Canyon, just west of Laguna Lake 1, 4.8 km ENE Signal Hill, Laguna Coast Wilderness Park. 116 Comment
  UCR267217  Deinandra paniculata Fred M. Roberts 2014-7-25 7882 Orange South Coastal Plain, SAN JOAQUIN HILLS: Laguna Canyon, Nix Nature Center, Laguna Coast Wilderness Park, about 4.4 km E Signal Peak 126 Comment
  RSA581442  Delphinium parryi Fred M. Roberts 1989-5-12 4361 Orange Santa Ana Mountains: Santiago Canyon, Flemming Regional Park, just E of Modjeska at end of paved road, ca. 3.3 km WSW Laurel Springs. 430 Comment
  RSA788921  Delphinium parryi subsp. parryi Fred M. Roberts 1999-6-10 5243 Orange Lomas de Santiago: Loma Ridge, Central Limestone Cyn., 4.5 km W Silverado School and 4.5 km NW Bolero Lookout. 306 Comment
  SD236098  Delphinium patens subsp. hepaticoideum Laurie Roberts, Lane McClelland 2006-5-29 21 San Diego Descanso. NW base of Guatay peak, along Old Highway 80, just NE of its intersection with SR- 79. 1110 Comment
  UCSB47986  Dendromecon rigida Roberts, Fred 1980-5-3 Orange Main Divide Truck Trail, 0.2km west of Trabuco Peak, Santa Ana Mtns. 1347 Comment
  UCR215308  Descurainia pinnata subsp. halictorum Fred M. Roberts, Eliza L. Maher 2008-3-26 6797 Orange South Coast, Dana Point; Dana Point Headlands, Center for Natural Lands Mgmt. Preserve near Strands Road gate, 0.8 km west of Marine Institute, Dana Point Harbor 71 Comment
  IRVC28052  Dicentra chrysantha Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5734 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  CHSC12639  Dicentra uniflora Geo. Roberts 1974-4-18 Calaveras Buck Ranch Rd., near Hayward Creek, n of State Hwy 4. 1524 Comment
  UCR128516  Dichelostemma capitatum Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5696 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed 305 Comment
  UCR128538  Dichelostemma capitatum Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5779 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 427 Comment
  UCSB52467  Dichelostemma capitatum Roberts, Fred 1983-2-10 Orange Dana Point: hills, 0.7km NE Dana Hills High School 92 Comment
  RSA0127418  Dichelostemma capitatum subsp. capitatum Fred M. Roberts 2016-3-17 8013 Orange San Joaquin Hills: City of Irvine, Ridge between Coyote Canyon and Bommer Canyon along Turtle Ridge Trail, 0.6 km NNE Signal Peak and 1.1 km SW Cattle Camp. 314 Comment
  SD143283  Dichelostemma capitatum subsp. capitatum Fred M. Roberts 1997-4-11 4992 San Diego Carlsbad:Upper Encintas Creek watershed east of Rancho Santa Fe Road, Fieldstone Southeast,ca. 5.7 km southwest Double Peak Abundant on gentle east-facing slope in open mosaic of coastal sage scrub and native grassland that had burned in October 1996 88 Comment
  SD164583  Dichelostemma capitatum subsp. capitatum Fred M. Roberts 2001-4-9 5406 San Diego Jamul Mountains:southwest slopes, northeast of Upper Otay Lake, 5.4 km southeast summit Mother Miguel Mtn. Otay Lakes North MSCP parcel. Knoll along ridge on mostly gentle southwest-facing slope in rocky, open coastal sage scrub and annual grassland 309 Comment
  IRVC28107  Dichondra occidentalis Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5786 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  RSA691029  Dichondra occidentalis Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5786 San Diego San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242. 427 Comment
  SD164499  Dichondra occidentalis Fred M. Roberts 2001-5-17 5468 San Diego Santa Fe Valley MSCP parcel: hills S of Lake Hodges, 4.4 km SW Bernardo Mtn. S-facing slope in chamise chaparral 249 Comment
  UCR125973  Dichondra occidentalis Fred M. Roberts 2001-5-22 5471 San Diego Peninsular Range, San Ysidro Mountains, NW foothills just east of Otay Lake, 0.5 km east of Savage Dam 215 Comment
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Sep 7 2019
  UCR128859  Dichondra occidentalis Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5786 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 427 Comment
  UCR242698  Dichondra occidentalis Fred M. Roberts 2012-5-10 7571 Orange Coastal Plains and Basins; Coastal foothills Region, SAN JOAQUIN HILLS: Buck Gully, south tributary, north slope Pelican Hill, just north of Pelican Hills Drive, 0.7 km N Pelican Hill summit. 154 Comment
  SD262380 Image available Dietes iridioides Jim Roberts 2015-1-9 75 San Diego City of San Diego; Tecolote Canyon Natural Park; in runoff channel approximately 75m downhill and west from Mt. Culebra Avenue entrance. 89 Comment
  RSA731938  Digitaria ciliaris Fred M. Roberts, Sandy Leatherman 2007-11-27 6697 Orange Yorba Linda: drainage channel on east side of Amberdale Dr. ca. 0.3 km S Fairmont Blvd. 118 Comment
  UCR188994  Digitaria ischaemum Fred M. Roberts 2007-10-29 6622 Orange South Coast, Niguel Hill, Laguna Niguel. Seaview Park, 1.3 km ENE of Aliso Peak 265 Comment
  SD233441  Digitaria sanguinalis Fred Roberts 2006-7-6 6362 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  RSA0019266  Dimorphotheca ecklonis Fred M. Roberts 2008-10-9 7122 Orange Dana Point: Dana Point Headlands, CNLM Preserve, at base of cliff adjacent to Dana Strands Beach, 0.8km WNW Marine Institute (Dana Point Harbor). 3 Comment
  SD192361  Dimorphotheca fruticosa Fred Roberts 2006-7-6 6380 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  UCR215301  Dimorphotheca sinuata Fred M. Roberts 2008-4-22 6924 Orange Lomas de Santiago, Loma Ridge, upper Hicks Canyon, along Haul Road, 0.8 km WNW and 3.2 km east of Rattlesnake Reservoir Dam 302 Comment
  RSA552948  Distichlis spicata Fred M. Roberts, R. E. Riefner 1989-5-2 4329 Orange Aliso-Wood Canyon Regional Park: Aliso Canyon, 3.4 kilometers SSE Moulton Peak., UTM 3711900m N, 432900m E 30 Comment
  RSA708818  Distichlis spicata Fred M. Roberts, Robert L. Allen, Chris Barnhill 2004-8-21 6113 Orange Caspers Wilderness Park, San Juan Cyn., Old San Juan Hot Springs, c.a. 0.4km SW San Juan Ranger Station, north of SR 74. 214 Comment
  RSA743471  Distichlis spicata Fred M. Roberts 2008-10-9 7124 Orange Dana Point: Dana Point Headlands, CNLM Preserve, at base of cliff adjacent to Dana Strands Beach, 0.8km WNW Marine Institute (Dana Point Harbor). 3 Comment
  UCSB47954  Distichlis spicata Roberts, D. 1980-5-4 Orange North end of Camino Capistrano Rd; 2nd telephone pole from the end 30 Comment
  SD192283  Dittrichia graveolens Fred Roberts, Carol A. Roberts 2006-10-15 6445 San Diego Miramar Marine Corps Air Station: Rose Cyn., south of Miramar Way between Schilt Rd. and Obregon Ave. 135 Comment
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Sep 5 2017
  RSA610234  Dodecatheon clevelandii Fred M. Roberts 1997-2-7 4976 Orange Rancho Mission Viejo: Calif. Rte. 74 circa 6.8 km E Interstate 5 ( San Juan Capistrano) opposite the mouth of Canada Gobernadora, 1.2km NE Viejo Survey Mark. 88 Comment
  UCSB52469  Draba cuneifolia Roberts, Fred; Marsh, K. 1983-2-25 Orange Laguna Beach, Goff Ridge, southern Temple Hill, 0.9 km NNE Goff Island 180 Comment
  RSA539423  Draba cuneifolia var. integrifolia Fred M. Roberts, Karlin G. Marsh 1989-3-7 4195 Orange LOMAS DE SANTIAGO: Loma Ridge, tributary to Hicks Canyon, 2.2 km W Bee Survey Mark. 166 Comment
  UCSB48384  Drymocallis glandulosa var. glandulosa Roberts, Fred 1982-4-18 Orange Santa Ana Mtns., San Juan Canyon, Hwy 74, 0.6km SW Lower San Juan Picnic Ground; 1.9km WNW Sitton Peak 420 Comment
  IRVC22504  Dryopteris arguta Fred M. Roberts 1985-5-1 1698 Orange Aliso Canyon, 2.1km NNE Aliso Peak, Aliso Viejo 67 Comment
  IRVC22665  Dryopteris arguta Fred M. Roberts 1985-5-9 1726 Orange Santa Ana Mountains: Upper McVicker Canyon, 1.8km NE Los Pinos Peak. Peninsular Ranges 1113 Comment
  IRVC23909  Dryopteris arguta Fred M. Roberts, R. L. Allen 1985-8-19 2136 Orange Mission Viejo: lateral to Engilish Canyon along Vista de Lago Drive; 3.4km ENE El Toro Fire Station. Southern Coastal 218 Comment
  UCR215285  Dryopteris arguta Fred M. Roberts 2008-5-14 6962 Orange Lomas de Santiago, Loma Ridge, upper Bee Flat Canyon below Loma Ridge Road, 1.3 km north of Bee Peak and 5.4 km NW of Bolero Lookout. Irvine Ranch Conservancy 337 Comment
  IRVC24994  Dryopteris arguta Fred M. Roberts, R. Fisher 1986-6-18 3015 Orange Irvine; [San Joaquin Hills], east lateral to Shady Canyon, c.a. 2.9km SE French Hill. 82 Comment
  IRVC25312  Dryopteris arguta Fred M. Roberts 1987-3-27 3278 Orange Canada de Los Alisos; Canada Rd., 4.5km NNE El Toro Fire Station. Southern Coastal 226 Comment
  RSA678502  Dudleya blochmaniae subsp. blochmaniae Fred M. Roberts, Robt Allen, Carol A. Roberts 2003-5-11 5863 Orange Dana Point Headlands: hilltop, 0.6km SSW Richard Henry Dana School south of Pacific Coast Highway and north of Scenic Drive. 73 Comment
  RSA0063395  Dudleya edulis Fred M. Roberts, David Bramlet 2003-6-6 5909 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, west slopes of Cristianitos Canyon, 0.86 km SSW Gato Gate and 0.39 km W of Cristianitos Road. 149 Comment
  RSA542641  Dudleya edulis Jeni L. Roberts, K. Keane 1988-5-25 3981 Orange Rancho Mission Viejo; Lower Canada Chiquita, 2.5 km SSE Medium Rancho Survey Mark; 105 Comment
  IRVC25461  Dudleya lanceolata Fred M. Roberts 1987-4-21 3386 Orange Aliso Creek, Aliso Creek Bike Trail, 3.0km ENE Moulton Peak, Aliso Viejo 73 Comment
  RSA743454  Dudleya lanceolata Fred M. Roberts 2008-7-10 7074 Orange Dana Point: Dana Point Headlands, CNLM Preserve, along north slopes above Dana Strand Beach, 0.8km WNW Marine Institute, Dana Point Harbor. 45 Comment
  UCSB48002  Dudleya lanceolata Roberts, Fred 1980-7-11 Orange Santa Ana Mtns.: Viejo Canyon; 3.0 km. ENE San Juan Guard Station; 0.6 km. N Hwy. 74 353 Comment
  RSA542640  Dudleya multicaulis Fred M. Roberts, Kathy Keane 1988-5-25 3994 Orange Rancho Mission Veijo: Lower Canada Chiquita, 2.0km SSE Medium Rancho Survey Marker. 91 Comment
  RSA550595  Dudleya multicaulis Fred M. Roberts 1989-4-26 4319 Orange Santa Ana Mtns.: Lower Blind Canyon near mouth, 9.2km SW Sierra Peak, 1.0km N Irvine Lake spillway. 213 Comment
  RSA550604  Dudleya multicaulis Fred M. Roberts 1989-4-25 4309 Orange Santa Ana Mountains: East Rim of Blind Canyon 8.5 kilometers SW Sierra Peak, c. 1.4 kilometer N Irvine Lake spillway. 366 Comment
  RSA552936  Dudleya multicaulis Fred M. Roberts 1989-5-7 4337 Orange Lomas De Santiago: 1.8km W Santiogo Reservoir Spilway, 4.0 km SW Sierra Peak. 213 Comment
  RSA747594  Dudleya multicaulis Fred M. Roberts 2000-5-19 5327 Orange Lomas de Santiago: Loma Ridge, ridge west of Bee Peak above Bee Cyn. landfill, 0.2 km W Bee Peak. 500 Comment
  UCR215300  Dudleya multicaulis Fred M. Roberts 2008-4-23 6925 Orange Lomas de Santiago, Loma Ridge, north end along Sheriff Rd., 1.6 km SE of Peters Canyon Reservoir dam 340 Comment
  RSA0062957  Dudleya pulverulenta subsp. pulverulenta Fred M. Roberts 2008-7-10 7076 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 65 Comment
  RSA703883  Dudleya pulverulenta subsp. pulverulenta Fred M. Roberts, D. E. Bramlet 2004-7-30 6080 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Western slopes of Cristianitos Cyn., 0.25km W Sycamore Gate and Cristianitos Road. 151 Comment
  UCR224165  Dudleya pulverulenta subsp. pulverulenta Fred M. Roberts 2008-7-10 7076 Orange South Coast, Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8 km west-northwest of Marine Institute, Dana Point Harbor 65 Comment
  SD148657  Dudleya variegata Fred M. Roberts 2001-6-6 5490 San Diego La Jolla Valley, Black Mtn. Ranch, 0.7 km northwest Barn Survey Marker. 139 Comment
  SD164493  Dudleya variegata Fred M. Roberts 2001-5-10 5456 San Diego Lusardi Creek MSCP parcel: Mesas N of Lusardi Creek, 1.4 km NE Low South Survey Marker. Hollow in mima mound-like topography near top of mesa and on gentle E-facing slope on cobbly clay lens in native grassland opening in coastal sage scrub 110 Comment
  SD220303  Dudleya variegata Fred Roberts 2000-5-17 5325 San Diego Jamul Mtns.: southern slope, Resort site, above Otay Lakes, 2.2 km ESE Upper Otay Lakes dam [Jamul Mtns. Quad: UTM Z11 05 08 506mE, 36 11 848mN]. 220 Comment
  SD203422 Image available Dudleya viscida Fred Roberts 2006-7-6 6350 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  UCSB48031  Dudleya viscida Roberts, Fred 1980-7-7 Orange Santa Ana Mtns.; San Juan Canyon, Hwy. 74, 2.3 km. ENE San Juan Guard Station; 0.4 km. W of Bench Mark 1100 315 Comment
  UCSB50636  Dudleya viscida Roberts, Fred 1982-7-9 Orange Santa Ana Mtns.; San Juan Canyon, Hwy. 74, 1.4 km. by road E San Juan Guard Station; 4.6 km. W Sitton Peak 275 Comment
  UCSB52397  Dysphania ambrosioides Roberts, Jr., Fred 1982-10-1 Santa Barbara Laguna Niguel; Niguel Hill, west flank, 2.7 km. NNE Aliso Peak; 0.9 km. WNW Alicia Fire Station 157 Comment
  UCSB52395  Dysphania multifida Roberts, Fred; Ferren, Wayne 1982-7-21 Orange Newport Beach; Upper Newport Back Bay, Back Bay Dr., 3.5 km. N San Joaquin Hills Rd.; 3.0 km. W UC Irvine campus 2 Comment
  RSA731947  Echinochloa colona Fred M. Roberts, Sandy Leatherman 2007-11-27 6688 Orange Yorba Linda: drainage channel on east side of Amberdale Dr. ca. 0.3 km S Fairmont Blvd. 118 Comment
  RSA725527  Echinochloa crus-galli Fred M. Roberts 2007-9-11 6575 Orange San Juan Capistrano: San Juan Creek at the confluence with Trabuco Creek. 17 Comment
  RSA731944  Echinochloa crus-galli Fred M. Roberts, Sandy Leatherman 2007-11-27 6691 Orange Yorba Linda: drainage channel on east side of Amberdale Dr. ca. 0.3 km S Fairmont Blvd. 118 Comment
  RSA0127350  Echium candicans Fred M. Roberts 2016-5-20 8058 Orange City of Irvine: San Joaquin Hills, Turtle Rock Community along Ridge Route Road, 1.0 km SE summit of French Hill and just NE intersection with Hillsborough Drive. 122 Comment
  RSA715696  Eclipta prostrata Fred M. Roberts, Chris M. Barnhill 2005-9-27 6276 Orange San Juan Capistrano: San Juan Creek wash, east of La Novia Road bridge, 1.4km E Mission San Juan Capistrano, 27 Comment
  IRVC24281  Eclipta prostrata Fred M. Roberts, G. A. Marsh 1985-10-26 2518 Orange Santa Ana River: adjacent to Huntington Beach; 0.7km SSW Adams Street bridge. southern coastal 4 Comment
  UCSB47620  Ehrendorferia chrysantha Roberts, Fred 1980-5-3 Orange Santa Ana Mtns., San Juan Canyon, Rte. 74, 0.2km S Lower San Juan Picnic Ground 393 Comment
  RSA688978  Ehrharta calycina Fred M. Roberts, David E. Bramlet 2003-4-10 5636 Orange Rancho Mission Viejo: Donna O'Neill Land conservancy, Back Road, ridge between Cristianitos Cyn, and Segunda Deshecha Canada, 1.45km WNW Gato Gate. 216 Comment
  UCSB36171  Ehrharta calycina Roberts, D. 1980-4-25 San Luis Obispo in open field dominated closest to the rd by grass; 6 mi NW Guadalupe on Calif 1 at Nipomo Mesa 30 Comment
  RSA731006  Ehrharta erecta Fred M. Roberts, B. Allen 2007-1-19 6508 Orange Mission Viejo: 23012 Via San Gabriel. Irrigated urban landscaping. 230 Comment
  RSA731651  Ehrharta erecta Fred M. Roberts 2007-10-29 6628 Orange Laguna Beach: Temple Hill, Nyes Place, c.a. 0.2 km S Moulton Meadows Park. 232 Comment
  RSA751986  Ehrharta erecta Fred M. Roberts, Eliza Maher 2008-3-26 6798 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 71 Comment
  RSA731949  Elatine californica Fred M. Roberts, Carol A. Roberts 1991-5-22 4801 Orange San Joaquin Hills: Upper Laguna Cyn., Upper Laguna Lake, c.a. 3.6km N by road of El Toro Rd. & 5km ENE Signal Peak. 118 Comment
  UCSB57546  Eleocharis montevidensis Roberts, Fred 1984-4-14 Orange Santa Ana Mtns.; Chiquito Basin, San Juan Trail, 1.9 km. SW Blue Jay Campground; 2.8 km. S Los Pinos Peak 840 Comment
  RSA542338  Eleocharis montevidensis var. montevidensis Fred M. Roberts, K. Keane 1988-5-25 3984 Orange Ranch Mission Viejo: Lower Canada Chiquita, 2.5 kilometers SSE Medium Rancho Survey Mark. 82 Comment
  RSA588792  Eleocharis montevidensis var. montevidensis Fred M. Roberts, D. Bontrager 1990-4-18 4569 Orange Rancho Mission Viejo: Canada Chiquita, east side of canyon near mouth, 2.7 kilometers SSE Median Rancho Survey Marker; UTM Z11 37 10 000N, 4 43 800m E 79 Comment
  RSA0027434  Eleocharis palustris Fred M. Roberts 2012-7-18 7674 Orange San Joaquin Hills: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus, of Poppy Street and 2.1 km WNW summit of Pelican Hill. 37 Comment
  RSA542551  Eleusine indica Fred M. Roberts 1987-8-19 3587 Orange Santa Ana River: adjacent to Fountain Valley, Harbor Bridge. 13 Comment
  RSA725461  Eleusine indica Fred M. Roberts 2007-8-6 6556 Orange San Joaquin Hills: Laguna Beach, Laguna Cyn. on east side of Laguna Cyn. Rd. adj. to dog park, 1.2 km S (air) from El Toro Road and 1.8 km WSW Moulton Survey Mk. 52 Comment
  SD193477  Elymus condensatus Fred Roberts 2006-7-6 6367 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  UCR177693  Elymus glaucus Fred M. Roberts 2003-5-1 5687 Orange Coastal Plains & Basins; South Coastal Plain region, Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.56 km SSW Gato Gate and 0.21 km west of Cristianitos Rd. 96 Comment
  UCSB47967  Elymus glaucus Roberts, Fred 1980-5-3 Orange Main Divide Truck Trail; 2.0km WNW of Trabuco Peak; Santa Ana Mountains 1234 Comment
  RSA539359  Elymus glaucus subsp. glaucus Fred M. Roberts 1988-6-9 4069 Orange Santa Ana Mountains: Main Divide Truck Trail, Upper Silverado Canyon, 1.9 kilometer N Modjeska Peak., UTM 3733000mN, 449500mE 1128 Comment
  UCR215297  Elymus glaucus var. glaucus Fred M. Roberts 2008-5-7 6940 Orange Lomas de Santiago, Limestone Ridge between Dripping Spring and Limestone Canyon, 3.5 km NW of Bolero Lookout and 1.7 km east of Bee Peak. Irvine Ranch Conservancy 481 Comment
  RSA539340  Elymus multisetus Fred M. Roberts, Carol A. Roberts 1988-6-9 4078 Orange Santa Ana Mountains: Modjeska Peak, 0.9km SW summit., 3730500mN, 449000mE 1542 Comment
  RSA679226  Elymus multisetus Fred M. Roberts 2003-6-25 5944 Orange Santiago peak, north slopes along ridge east of Main Divide truck trail, 0.6km NNW summit. 1605 Comment
  RSA539385  Emmenanthe penduliflora Fred M. Roberts, Carol A. Roberts 1988-6-10 4093 Orange Santa Ana Mtns: Main Divede Truck Trail, Modjeska Peak, 1.1 km SW summit. 465 Comment
  RSA0127347  Emmenanthe penduliflora var. penduliflora Fred M. Roberts 2016-4-29 8050 Orange Lomas de Santiago: north of Santiago Canyon Road, southwest slope of hill marked 1332 on topo maps, just west of Irvine Lake, 1.6 km S Irvine Lake dam spillway and 0.8 km NW Irvine Lake Park. 335 Comment
  RSA0073641  Encelia californica Fred M. Roberts 2010-3-12 7177 Orange Southeast Coast: DANA POINT HEADLANDS: Harbor Point Park, South of Green Lantern and west of Dana Point Harbor, c.a. 150 meters SE Interpretive Center. 50 Comment
  RSA681948  Encelia californica Fred M. Roberts, David E. Bramlet 2003-3-7 5569 Orange Donna O'Neill Land Conservancy; Ridge west of Christianitos Canyon, Middle Ridge Trail, 1.1km NW Gato Gate. 178 Comment
  RSA719414  Encelia californica Fred M. Roberts, Lee Ann Caranza 2006-10-25 6452 Orange Dana Point Headlands south of Margarite Drive, 0.6km W Marine Institute and 1km SW Cook Sch. 58 Comment
  SD193591  Encelia californica Fred Roberts 2006-7-6 6378 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  UCR239635  Encelia californica Fred M. Roberts 2012-4-24 7503 Orange San Joaquin Hills, Buck Gully, west of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km west of Signal Peak 179 Comment
  UCR281022  Ephedra aspera Fred M. Roberts 2016-3-5 8002 Riverside Sonoran (Colorado) Desert, Little Maria Mountains: shallow canyon at west end, 4.3 km east of Palen Pass and 2.0 km WNW Peak "602" 116 Comment
  SEINET5335149  Ephedra nevadensis J. Robertson 1974-6-25 116 -74 Mono 2 mi. east of Benton Ca, on dump road 1792 Comment
  SD242610  Epilobium brachycarpum Fred Roberts 2011-9-9 7465 San Diego San Marcos: Universal Boot parcel, along east side of South Pacific St., 0.2 km N jct. San Marcos Blvd. San Marcos USGS 7.5min Quad. 162 Comment
  SBBG60124  Epilobium canum G. Robertson -Aug-1903 Unknown near "Corona" San Padro Martir 1828 Comment
  UCSB52396  Epilobium canum subsp. canum Roberts, Fred 1982-9-20 Orange Santa Ana Mts., near jct. of San Juan and Chiquito Basin Trails, 1.4km SW Blue Jay Campground; 2.4km SSE Los Pinos Peak 974 Comment
  UCSB48194  Epilobium ciliatum Roberts, Fred 1981-6-26 Orange Santa Ana Mountains, East fork Viejo Cyn., 0.6 km N Calif. Rte. 74; 2.7km E San Juan Guard Station 326 Comment
  SD242612  Epilobium ciliatum subsp. ciliatum Fred Roberts 2011-9-9 7471 San Diego San Marcos: Universal Boot parcel, along north side of San Marcos Blvd. about 150 meters W jct. South Los Posas Rd. San Marcos USGS 7.5min Quad. 160 Comment
  RSA666103  Epilobium pygmaeum Fred M. Roberts, Michelle Lee 2001-6-4 5487 Orange Rancho Mission Viejo: Chiquita Ridge, 0.3km WNW Median Rancho Survey Marker. PCR Vernal Pool 4. (Canada Gobernadora. 226 Comment
  UCSB47992  Epipactis gigantea Roberts, Fred 1980-6-25 Orange Santa Ana Mtns; San Juan Canyon; below Calif. Rte. 74; 2.4 km ENE San Juan Guard Station; 0.3 km WSW BM 1100 290 Comment
  IRVC25613  Epipactis gigantea Fred M. Roberts, Karen M. Calloway 1987-7-20 3478 Inyo White Mountains; 8km NE Bishop; Silver Canyon; Silver Canyon Road; 2.4km from Los Positas Road at canyon mouth. 1398 Comment
  UCR236672  Eragrostis Fred M. Roberts, Michelle Balk 2006-8-24 6403 Riverside Upper San Jacinto Valley, Hemet, south side of Esplanade Rd. near intersection with Alabaster Rd., 0.3 km E of junction with Warren Rd. 452 Comment
  RSA730989  Eragrostis mexicana subsp. virescens Fred M. Roberts 2006-11-15 6463 Orange Santa Ana Cyn., 1.0 km ENE Imperial Hwy bridge, between La Palma Ave. and Santa Ana River near Big Springs St. 89 Comment
  UCR236675  Eragrostis pilosa Fred M. Roberts, Sandra L. Leatherman 2008-9-17 7105 Orange Peninsular Ranges, Santa Ana River Canyon: Yorba Linda Regional Park adjacent to Santa Ana River, South of La Palma Ave. and 1.7 km ENE Imperial Hwy. bridge over river 87 Comment
  SEINET5336784  Eremogone kingii var. glabrescens J. Robertson, Y. Robertson 1979-6-21 s.n. Mono Masonic Hills, 6.2 mi. from HW 182 between fork of new and old roads, Toiyabe NF. 2493 Comment
  UCR241914  Eriastrum sapphirinum Fred M. Roberts 2012-5-10 7564 Orange Peninsular Ranges; Coastal Foothills, San Joaquin Hills, south fork of Buck Gully, north slope Pelican Hill, 0.6 km N summit Pelican Hill, north of Pelican Hill Drive 183 Comment
  RSA0013856  Eriastrum sapphirinum subsp. dasyanthum Fred M. Roberts 2012-5-10 7564 Orange San Joaquin Hills: Buck Gully, S Fork, north slope Pelican Hill, 0.6 km N summit Pelican Hill, north of Pelican Hill Drive. 183 Comment
  UCSB48005  Eriastrum sapphirinum subsp. dasyanthum Roberts, Fred 1980-6-29 Orange Santa Ana Mtns., Viejo Canyon, 0.4 km. N Calif. Rte. 74; 2.2 km. ENE San Juan Guard Station 341 Comment
  RSA0121317  Eriastrum sapphirinum subsp. dasyanthum Fred M. Roberts, Dave Bontrager 1990-6-5 4677 Orange Rancho Mission Viejo: Lower Canada Gobernidora, ca. 3.0 km W Point Rancho Survey Marker. 104 Comment
  SEINET7846144 Image available Ericameria discoidea J. Robertson, Y. Robertson 1979-7-20 s.n. Mono Star City, NW of buildings 2591 Comment
  CHSC13459  Ericameria linearifolia J. Roberts 1973-4-17 14 San Luis Obispo Found ca.10 mi s of Hwy. 41, ca. 10 mi e of Cholame. 304 Comment
  RSA588848  Ericameria palmeri var. pachylepis Fred M. Roberts 1989-11-7 4455 Orange Rancho Mission Viejo: trw Lease holding, ridge N of Talega Canyon, 5.4km NE Clemente Survey Marker. 166 Comment
  RSA703702  Ericameria palmeri var. pachylepis Fred M. Roberts, David E. Bramlet 2004-11-5 6132 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Gato Cyn., tributary to Cristianitos Cyn., 0.62 km NW Gato Gate and 0.55 km W Cristianitos Rd. 125 Comment
  UCR239618  Ericameria palmeri var. pachylepis Fred M. Roberts 2012-4-27 7537 Orange Lomas de Santiago, Loma Ridge, west of SR 241, tributary to 'Las Flores' Canyon, 1.9 km southwest of Irvine Lake Park Campground and 1.2 km east-souteast of Orange County Emergency Operations Center, Hill 1311 350 Comment
  RSA708533  Ericameria parishii var. parishii Fred M. Roberts, Robert L. Allen, Chris Barnhill 2004-8-21 6106 Orange Caspers Wilderness Park, Hot Springs Cyn., Hot Springs Trail, c.a. 0.16km WSW San Juan Ranger Station, north of SR 74. 212 Comment
  IRVC20221  Ericameria pinifolia Fred M. Roberts 1982-10-14 829 Orange Temple Hill, 1.1km NNW Top of the World School, Laguna Beach 259 Comment
  SD192266  Erigeron bonariensis Fred Roberts 2006-7-6 6368 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  UCR258622  Erigeron bonariensis Fred M. Roberts 2014-7-25 7886 Orange South Coast, SAN JOAQUIN HILLS: Upper Laguna Canyon, Laguna Lake 1 (Upper Laguna Lake), north basin, c.a. 5.1 kn ENE summit Signal Hill. Laguna Coast Wilderness Park 113 Comment
  UCSB48042  Erigeron canadensis Roberts, Fred 1981-9-26 Orange Newport Beach: Pacific Coast Highway, 0.3km W Newport Blvd.; 0.4 km. SE Bench Mark 10 3 Comment
  SEINET8078629 Image available Erigeron clokeyi J. H. Robertson, Y. Robertson 1979-7-18 s.n. Mono Sweetwater Mtns. Across creek from barren, steep, rocky canyon side, along trail up no. fork of Sweetwater Cr. Site 96. 2774 Comment
  UC61525  Erigeron divergens Geo. Robertson 1903-11-9 109 San Bernardino Forest Home San Bernardino Mts., Mill Creek, Forest Home, ca. 12 mi E of Redlands 1828 Comment
  UCSB48195  Erigeron foliosus Roberts, Fred 1981-6-26 Orange Santa Ana Mtns.; Viejo Cyn., 0.5km N Calif. Rte. 74; 2.7km ENE San Juan Guard Station 317 Comment
  SD164554  Erigeron foliosus var. foliosus Fred M. Roberts, Rod Dossey 2005-5-10 6182 San Diego Miramar Marine Corps Air Station: San Clemente Canyon about 1.3km E SR 805 above the Kinder Morgoan Petroleum Pipeline Station, UTM Z11S 04 84 751mE, 36 04 105mN. 91 Comment
  UCR215284  Erigeron foliosus var. foliosus Fred M. Roberts 2008-5-14 6964 Orange Lomas de Santiago, Loma Ridge, upper Bee Flat Canyon below Loma Ridge Road, 1.3 km north of Bee Peak and 5.4 km NW of Bolero Lookout. Irvine Ranch Conservancy 337 Comment
  UCSB56694  Erigeron utahensis Roberts, Fred 1982-5-15 San Bernardino New York Mtns.; Keystone Canyon, 1.0 km. NE Keystone Spring 1804 Comment
  RSA550599  Eriodictyon crassifolium Fred M. Roberts 1989-4-26 4315 Orange Lomas de Santiago: Lower Santiago Canyon, 10.1 km SW Sierra Peak, ca. 1.3 km NW Irvine Lake spillway. 195 Comment
  UCSB47628  Eriodictyon crassifolium Roberts, Jr., Fred 1980-5-3 Orange Santa Ana Mtns.; Main Divide Truck Trail, 1.1 km. SE Blue Jay Campground; 2.6 km. WSW El Cariso Guard Station 902 Comment
  UCSB57032  Eriodictyon parryi Roberts, Jr., Fred 1985-7-26 Orange Santa Ana Mtns.; Main Divide Truck Trail near Los Pinos saddle, 1.5 km. NE Los Pinos Peak, UTM 3725850m N, 457400m E 1257 Comment
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Feb 22 2019
  UCD119315  Eriodictyon traskiae subsp. smithii Warren Roberts; Dick Hildreth, Karl Raven 1973-9-21 SBC 73 -45 Santa Barbara Collected 2.5 mi. from Kenevan Canon turnoff from San Marcos pass hwy on W. Camino Cielo Rd. Comment
  SEINET5328579  Eriogonum caespitosum J. Robertson, Y. Robertson 1979-6-20 s.n. Mono Masonic Hills, 5.9 mi. from HW 182 ;2.4 mi. from NF boundary. Site 38 2499 Comment
  RSA450871  Eriogonum cinereum Fred M. Roberts 1985-7-22 2058 Orange Irvine: MacArthur Blvd., 0.2km N Bonita Canyon Rd.; 1.6 km W UC Irvine campus. 15 Comment
  UCSB56682  Eriogonum cinereum Roberts, Fred 1985-7-22 Orange Irvine: MacArthur Blvd., 0.2km N Bonita Canyon Rd.; 1.6km W UC Irvine campus 15 Comment
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Feb 22 2019
  UCSB52439  Eriogonum davidsonii Roberts, Fred 1982-5-15 San Bernardino Midhills: 0.1km WNW Midhills Campground 1837 Comment
  RSA716727  Eriogonum elongatum Fred M. Roberts 2004-8-21 6101 Orange Santa Ana Mtns.: Hot Springs Cyn., Hot Springs Cyn. Rd., c.a. 0.8km by road N. jct. SR 74; 0.7 km NNW Juan Rancho Survey Mark. 255 Comment
  UCSB48016  Eriogonum elongatum Roberts, Fred 1980-9-14 Orange Santa Ana Mtns: San Juan Cyn, 2.5km ENE San Juan Guard Station; 2.1km WSW Lower San Juan Picnic Ground 345 Comment
  SD262694  Eriogonum elongatum var. elongatum Jim Roberts 2013-7-30 43 San Diego City of San Diego; Tecolote Canyon Natural Park; near 0.31 mi NW of intersection Balboa Ave and Clairemont Drive; 10m north of tributary channel that cuts across the road 64 Comment
  UCR239655  Eriogonum elongatum var. elongatum Fred M. Roberts 2012-4-27 7542 Orange Lomas de Santiago, Loma Ridge, west of SR 241, tributary to 'Las Flores' Canyon, near East Loma Ridge Road, 1.6 km southwest Irvine Lake Park Campground and 1.2 km east-southeast of Orange County Emergency Operations Center, Hill 1311 308 Comment
  IRVC28327  Eriogonum fasciculatum Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5711 San Diego Otay Mountain, south side near crest of ridge east of lower "Butteweg Canyon" along the border trail, Tijuana River watershed Peninsular Range, San Ysidro Mountains 305 Comment
  UCR128527  Eriogonum fasciculatum var. fasciculatum Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5711 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed 305 Comment
  UCSB48025  Eriogonum fasciculatum var. foliolosum Roberts, Fred 1980-7-7 Orange Santa Ana Mtns; San Juan Canyon, Calif. Rte. 74, 2.2km ENE San Juan Guard Station; 0.6km W BM 1100 305 Comment
  UCSB48007  Eriogonum gracile Roberts, Fred 1980-6-29 Orange Santa Ana Mtns; Viejo Canyon; 0.4km N Calif. Rte 74; 2.2km ENE San Juan Guard Station 341 Comment
  UCSB52907  Eriogonum gracile Roberts, Fred 1984-8-14 Orange Chiquito Basin Trail; ridge between Chiquito Basin and Lion Canyon; 2.6km SSE Los Pinos Peak; 1.3km SSW Blue Jay Camp ground; Santa Ana Mtns 885 Comment
  UCSB56685  Eriogonum gracile Roberts, Fred 1982-9-20 Orange Santa Ana Mts; Chiquito Basin, San Juan Trail; 2.2km SW Blue Jay Campground; 3.0km S Los Pinos Peak 905 Comment
  UCSB34453  Eriogonum gracillimum Roberts, Fred 1980-5-25 Kern Along Highway 14 on the south end of Red Rock Canyon; Red Rock Canyon Reserve; 27.4 km SSW of Freeman 838 Comment
  RSA650676  Eriogonum inflatum Jeni L. Roberts 1991-5-5 28 San Bernardino Within Victorville City Limits. 2.5 miles N/W of I-15 on National Trails Highway. Comment
  UCSB53687  Eriogonum inflatum Roberts, Dar 1983-7-23 Mono 1 mile S of Rocked-in-Spring on east side of slough; Fish Slough: a desert wetland system 4.5 mi. north of Bishop; at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis 1341 Comment
  UCSB52432  Eriogonum inflatum Roberts, Fred 1982-5-14 San Bernardino Providence Mtns; Vulcan Mine Road; 5.1km by road SE Kelbaker Road 1099 Comment
  UCSB53036  Eriogonum maculatum Roberts, Dar 1983-7-23 Mono 1 mile S of Rocked-in-Spring on east side of slough; Fish Slough: a desert wetland system 4.5 mi. north of Bishop; at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis 1341 Comment
  UCSB54284  Eriogonum maculatum Roberts, Dar 1984-4-28 Mono E of BLM Spring; 2.5 miles S of Rocked-in-Spring; Fish Slough: a desert wetland system 4.5 mi. north of Bishop; at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis 1341 Comment
  RSA665943  Eriogonum microtheca var. johnstonii Fred M. Roberts 2001-7-31 5517 San Bernardino San Bernardino Mountains; Ridge at head of Little Morongo Canyon on north slope of unnamed peak (listed as 8620 on), 4.3 km SE Onyx Peak near end of Forest Service Road 1N02.2C. 2570 Comment
  UCR123321  Eriogonum microthecum var. johnstonii Fred M. Roberts 2001-7-31 5516 San Bernardino San Bernardino Mtns., Head of Little Morongo Canyon on N slope of unnamed peak, 4.3 km SE of Onyx Peak near end of Forest Service Road 1N02.2C 2570 Comment
  UCR123323  Eriogonum microthecum var. johnstonii Fred M. Roberts 2001-7-31 5517 San Bernardino San Bernardino Mtns., Head of Little Morongo Canyon on N slope of unnamed peak, 4.3 km SE of Onyx Peak near end of Forest Service Road 1N02.2C 2570 Comment
  SEINET5330779  Eriogonum microthecum var. laxiflorum J. Robertson 1979-7-19 s.n. Mono Bench near salt ground at road fork. 2347 Comment
  RSA539352  Eriogonum nudum var. pauciflorum Fred M. Roberts, Richard E. Riefner 1988-7-9 4118 Orange Santa Ana Mountains: Upper Silverado Canyon, Maple Springs Truck Trail, 11.5 km above Silverado Gate, 1.1 km NNW Modjeska Peak. 1350 Comment
  SEINET5331029  Eriogonum ovalifolium var. nivale J. Robertson 1979-7-19 s.n. Mono 3048 Comment
  UCSB52434  Eriogonum thomasii Roberts, Fred 1982-5-14 San Bernardino Hwy 66; 17.2km by road E Newberry; 13.8km WNW Pisgah Crater; Mojave Desert 607 Comment
  CAS-BOT-BC265156  Eriogonum umbellatum var. nevadense A. Roberts 1898-8-1 s.n. Placer Summit Soda Springs, Donner Cr. Comment
  NY399280  Eriogonum umbellatum var. nevadense J. H. Robertson 1975-7-17 NS 18 -75 Mono 4 miles above California Route 167 on Bodie road 2158.0 Comment
  SEINET5331915  Eriogonum umbellatum var. nevadense J. Robertson, Y. Robertson 1979-6-20 s.n. Mono Toiyabe NF, 2.4 mi. from NF boundary. 2499 Comment
  RSA488128  Eriogonum wrightii var. membranaceum Fred M. Roberts, M. J. Roberts 1985-8-8 2117 San Diego Laguna Mountains: Sunrise Hwy, S-1, 10.8km by road NW Mt. Laguna 1630 Comment
  CAS-BOT-BC304081  Eriophyllum confertiflorum Robert Robertson 1954-5-1 109 San Mateo 2 miles E of Pescadero 30 Comment
  IRVC28453  Eriophyllum confertiflorum Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5726 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  IRVC28480  Eriophyllum confertiflorum Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5802 San Diego Otay Mtn; head of cyn 2 miles NW of Otay Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 470 Comment
  RSA0013910  Eriophyllum confertiflorum Fred M. Roberts 2012-4-24 7523 Orange San Joaquin Hills: Buck Gully, tributary canyon below San Joaquin Hills Road and 2.0 km W Signal Peak 167 Comment
  UCR241905  Eriophyllum confertiflorum Fred M. Roberts 2012-4-24 7523 Orange Peninsular Ranges; Coastal Foothills, San Joaquin Hills, Buck Gully, tributary canyon below San Joaquin Hills Road and 2.0 km W Signal Peak 167 Comment
  SD233966  Eriophyllum confertiflorum var. confertiflorum Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5802 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca 0.4 mi. WSW of peak 22242. 470 Comment
  SEINET8687301 Image available Eriophyllum lanatum var. integrifolium J. H. Robertson, Y. Robertson 1979-7-20 s.n. Mono Rockfield NW of buildings. Star City. Site 106. 2591 Comment
  SD164454  Erodium brachycarpum Fred M. Roberts 2001-4-9 5415 San Diego Jamul Mtns.: SW slopes, NE of Upper Otay Lake, 5.4 km SE summit Mother Miguel Mtn. Otay Lakes North MSCP parcel. Knoll along ridge on gentle SW-facing slope in rocky, open coastal sage scrub and annual grassland 309 Comment
  RSA610240  Erodium brachycarpum Fred M. Roberts 1997-3-13 4983 Orange Rancho Mission Viejo: Christianitos Canyon, 4 km ESE Viejo Survey Mark. 5 Comment
  RSA687523  Erodium cicutarium Fred M. Roberts, D. E. Bramlet 2003-3-27 5622 Orange Rancho Mission Viejo: Donna O Neill Land Conservancy, Chistianitos Cyn., 0.79km N Sycamore Gate, 0.23km W Chistianitos Rd. 122 Comment
  RSA743496  Erodium cicutarium Fred M. Roberts 2008-3-19 6781 Orange Dana Point: Dana Point Headlands, CNLM Preserve, 0.8km W Marine Institute, Dana Point Harbor. 45 Comment
  RSA684304  Erodium moschatum Fred M. Roberts, David E. Bramlet 2003-3-13 5602 Orange Donna O Neill Land Conservancy: Flagpole Meadow, upper Shady Cyn. W of Cristianitos Canyon, 1,500m NW Sycamore Gate and 1,220m W Cristianitos Rd. 173 Comment
  UCSB47792  Erysimum capitatum var. lompocense Roberts, Dar 1983-2-20 Santa Barbara La Purisima Mission State Historic Park; 2 km. NE of Lompoc City Limit; at junction of service roads west of the ranger's residences (southwest end of the loop road) Comment
  UCSB39687  Erysimum suffrutescens Roberts, Fred 1982-1-16 Santa Barbara Point Sal State Beach; on ridge east of fire break 304 Comment
  IRVC28131  Eschscholzia californica Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5764 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  SD185796  Eschscholzia californica Laurie Roberts, Lane McClelland 2006-5-29 16 San Diego Descanso. NW base of Guatay peak, along Old Highway 80, just NE of its intersection with SR- 79. 1098 Comment
  SD233895  Eschscholzia californica Fred M. Roberts, M. White, D. Flietner 2003-5-4 5764 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242. 427 Comment
  SD234970  Eschscholzia californica Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5714 San Diego Peninsular Range, San Ysidro Mountains: Otay Mountain, south side near crest of ridge east of lower Butteweg Canyon along the border trail, Tijuana River watershed (Otay Mountain 7.5' Q) 305 Comment
  UCR128529  Eschscholzia californica Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5714 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed 305 Comment
  UCR267212  Eschscholzia californica Fred M. Roberts, Lee Ann Caranza 2009-4-7 7139 Orange South Coastal Region, DANA POINT HEADLANDS: Dana Point CNLM Preserve, 0.8 km WNW Dana Point Marine Institute at Dana Point Harbor 65 Comment
  IRVC29095  Eschscholzia californica var. peninsularis Fred M. Roberts 1989-3-17 4210 Orange Aliso Canyon, 3.3km SSE Moulton Pk. Aliso-Wood Canyon Regional Park 30 Comment
  RSA548864  Eschscholzia californica var. peninsularis Fred M. Roberts, Carol A. Roberts 1988-6-2 4032 Orange Santa Ana Mtns: Silverado Canyon, Maple Springs Truck Trail, 4.3km above gate. 1.0 km WSW Bald Peak. 817 Comment
  RSA0010840  Eucalyptus camaldulensis Fred M. Roberts, Sandy Leatherman 2007-11-27 6673 Orange Yorba Linda: Santa Ana Canyon, Santa Ana River wash, S of E La Palma Road near Via Lomas de Yorba Linda, about 0.6 km W Gypsum Cyn. bridge. 113 Comment
  RSA0012602  Eucalyptus globulus Fred M. Roberts, Karlin G. Marsh 1988-4-25 3928 Orange San Joaquin Hills: Irvine coast, ca 1.3 km SW Pelican Hill. 43 Comment
  IRVC28048  Eucrypta chrysanthemifolia Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5748 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  RSA683068  Eucrypta chrysanthemifolia var. chrysanthemifolia Fred M. Roberts 2003-3-19 5603 Orange Donna O Neill Land Conservancy: Ridges west of Cristianitos Cyn., 1,750m NNW Sycamore gate and 315m W Cristianitos Rd. (Canada Gobernadora) 192 Comment
  JEPS22971  Euonymus occidentalis var. occidentalis Harry K. Roberts 1959-5-18 Sonoma n.w. Sebastopol (Louis Giovanni ranch, first canyon s. of ranch house); Green Valley, Louis Giovanni ranch Comment
  IRVC25150  Euphorbia albomarginata Fred M. Roberts 1986-9-3 3134 Orange adjacent to Anaheim, between Yorba Linda Regional Park and Imperial Hwy, Santa Ana River 88 Comment
  RSA704429  Euphorbia albomarginata Fred M. Roberts, David E. Bramlet 2004-7-30 6086 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn. along Cristianitos Ck., 1.1 km SSW Gato Gate and 0.32km W Cristianitos Road. 73 Comment
  RSA788900  Euphorbia albomarginata Fred M. Roberts 2008-6-12 7040 Orange Lomas de Santiago: Loma Ridge, Shoestring Canyon, Shoestring Road near jct. with Santiago Cyn. Rd. 251 Comment
  UCR266667  Euphorbia eriantha Fred M. Roberts 2014-10-26 7902 San Bernardino Sonoran Desert, CHEMEHUEVI VALLEY: tributary to Gary Wash at west base of hill with VABM Huevis, 0.2 km E SR 95 and 4.5 km NW Pyramid Butte 387 Comment
  IRVC25153  Euphorbia maculata Fred M. Roberts 1986-9-3 3133 Orange adjacent to Anaheim, between Yorba Linda Regional Park and Imperial Hwy, Santa Ana River 88 Comment
  SD192510  Euphorbia maculata Fred Roberts 2006-7-6 6381 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  SD193773  Euphorbia maculata Fred Roberts, Carol A. Roberts 2006-10-15 6437 San Diego Miramar Marine Corps Air Station: Rose Cyn., along west side of Schilt Rd. between Miramar Way and the Flightline. 135 Comment
  SD196475  Euphorbia maculata Fred Roberts 2007-6-7 6522 San Diego Rancho Santa Fe: Osuna Valley, north side of Calzada del Bosque Rd., 0.2 km E jct. with Via de la Valle Rd. and 1.7 km SSW Rancho Santa Fe towncenter. 10 Comment
  SD262451  Euphorbia melanadenia Jim Roberts, T. Chester, A. Ballway, N. Accola 2015-3-8 87 San Diego Anza-Borrego Desert State Park; Ranchita area; 2.70 miles SE of junction Wilson Road and S-22; several hundred meters off of Wilson trail in Culp Valley; 1.62 miles N of Grapevine Canyon 1155 Comment
  RSA719422  Euphorbia misera Fred M. Roberts, Lee Ann Caranza 2006-10-25 6455 Orange Dana Point Headlands south of Margarite Drive, 0.6km W Marine Institute and 1km SW Cook Sch. 58 Comment
  UCSB52452  Euphorbia misera Roberts, Fred 1983-3-10 Orange Dana Point Headlands: south of Scenic Dr., 0.3 km. W Dana Point Harbor; 0.8 km. S Richard Henry Dana School 60 Comment
  RSA716774  Euphorbia peplus Fred M. Roberts, Michelle Balk, Robert Allen, Chris Barnhill 2004-6-19 6065 Orange Santa Ana Mtns: Holy Jim Cyn.: Holy Jim Trail, 3.5km SE summit of Santiago Peak. 610 Comment
  RSA731929  Euphorbia peplus Fred M. Roberts, Sandy Leatherman 2007-11-27 6681 Orange Yorba Linda: drainage channel on east side of Amberdale Dr. ca. 0.3 km S Fairmont Blvd. 118 Comment
  SD196485  Euphorbia peplus Fred Roberts 2007-6-7 6518 San Diego Rancho Santa Fe: Osuna Valley, east side of Via de la Valle Rd., 0.1 km N jct. Calzada del Bosque Rd. and 1.6 km SSW Rancho Santa Fe town center. 11 Comment
  RSA0126620  Euphorbia polycarpa var. polycarpa Fred M. Roberts 2012-4-24 7514 Orange San Joaquin Hills: Buck Gully, W of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km W Signal Peak. 179 Comment
  SD240223 Image available Euphorbia rigida Jim Roberts 2014-1-31 49 San Diego City of San Diego; Tecolote Canyon Natural Park; about 0.25 mi NE Gardena Street entrance, near end of a steep drainage running S from September Street 35 Comment
  RSA0020540  Euphorbia serpens Fred M. Roberts 2007-8-6 6559 Orange San Joaquin Hills: Laguna Beach, Laguna Cyn. on east side of Laguna Cyn. Rd. adj. to dog park, 1.2 km S (air) from El Toro Road and 1.8 km WSW Moulton Survey Mk. 52 Comment
  IRVC28460  Euphorbia spathulata Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5755 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  SD233820  Euphorbia spathulata Fred M Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5755 San Diego Peninsular Range, San Ysidro Mountains: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed (Otay Mtn 7.5' Q). 167 Comment
  SD242581  Euphorbia terracina Fred Roberts 2009-9-29 7164 San Diego San Diego: Upper Deer Canyon drainage between Carmel Mtn. Road and Abling Ave., c.a. 100 meters N of SR56. UTM 04 86 386mE, 36 46 398mN. 121 Comment
  UCR246512  Euphorbia terracina Fred M. Roberts 2009-9-29 7164 San Diego Upper Deer Canyon drainage between Carmel Mountain Road and Abing Avenue, c. 100 m north of SR56 and 4.0 km southwest of the summit of Black Mountain. Square M9 122 Comment
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May 28 2014
  UCSB52990  Euthamia occidentalis Roberts, Jr., Fred 1983-9-29 Orange Irvine; San Joaquin Freshwater Marsh, 1.9 km. NNW UCI campus center 2 Comment
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Dec 12 2018
  UCSB36164  Festuca bromoides Roberts, D. 1980-4-25 San Luis Obispo 2 miles East along Cuesta Ridge Rd to meadow 610 Comment
  UCSB48110  Festuca bromoides Roberts, Fred 1981-4-12 Santa Barbara San Juan Canyon; Hwy 74; 1.3km by road E San Juan Guard Sta; 0.9km SE Juan Rancho Survey Mark; Santa Ana Mountains 295 Comment
  UCSB36170  Festuca microstachys Roberts, Dar 1980-4-12 Santa Barbara De la Guerra Springs appx .7 miles from main road 760? Comment
  UCR223964  Festuca myuros Fred M. Roberts 2008-4-9 6854 Orange South Coast, Dana Point, Dana Point Headlands, CNLM Preserve, near Outlook 2, 0.7 km west of Marine Institute, Dana Point Harbor 52 Comment
  UCSB40754  Festuca myuros Roberts, Dar 1981-3-25 Santa Barbara 2.0 km. SSE of Coches Point; Santa Cruz Island 243 Comment
  UCSB52459  Festuca myuros Roberts, Fred 1983-3-10 Orange Dana Point Headlands; cliff above Dana Point Harbor; south of old Cove Rd.; 0.8km S Richard Henry Dana School 60 Comment
  UCSB36173  Festuca myuros Roberts, D. 1980-4-25 Santa Barbara 4 1/2 miles N Vandenberg Connector Rd; Calif 1 junct. top of Harris Grade 274 Comment
  RSA0073644  Festuca octoflora var. octoflora Fred M. Roberts, Lee Ann Caranza, Eliza Maher 2009-4-7 7145 Orange South Coast Region: DANA POINT HEADLANDS: Dana Point CNLM Preserve, 0.8 km WNW Dana Point Marine Institute at Dana Point Harbor. 50 Comment
  UCR267214  Festuca octoflora var. octoflora Fred M. Roberts, Lee Ann Caranza & Eliza Maher 2009-4-7 7145 Orange South Coast Region, DANA POINT HEADLANDS: Dana Point CNLM Preserve, 0.8 km WNW Dana Point Marine Institute at Dana Point Harbor 50 Comment
  UCR239640  Festuca pratensis Fred M. Roberts 2012-5-9 7559 Orange Santa Ana Mountains, Lake Forest, along Serrano Creek hiking trail, 1.0 m south-southwest of intersection of Commercentre and Dimension Drives 171 Comment
  RSA716499  Ficus carica Fred M. Roberts, Amber Oneal 2004-8-18 6098 Orange San Juan Capistrno: Ortega Ranch Business Center site, between Rancho Viejo Rd. and I-5 freeway adjacent to Horno Creek; 0.6km NE Mission San Juan Capistrano. 54 Comment
  RSA725507  Ficus carica Fred M. Roberts 2007-9-11 6568 Orange Aliso Viejo: tributary to Aliso Creek on west side of Moulton Pkwy., 0.2 km N Aliso Viejo Pkwy., adj. to Kinder Care Learning Center. 83 Comment
  RSA0013949  Filago arizonica Fred M. Roberts 2008-4-24 6928 Orange Lomas de Santiago: Loma Ridge, lower Hicks Cyn. 350 meters east of Haul Rd., 1.9 km E Rattlesnake Cyn. Reservoir dam and 2.1 km W Bee Peak. Irvine Ranch Conservancy. 180 Comment
  IRVC22037  Filago californica Fred M. Roberts 1983-5-4 1028 Orange Temple Hill, Upper Rancho Laguna Canyon, 1.7km SSW Top of the World Sch.; 1.4km ENE Cactus Point, Laguna Beach 200 Comment
  RSA552943  Filago californica Fred M. Roberts, Carol A. Roberts 1989-4-20 4300 Orange Santa Ana Mtns: Upper Lion Canyon along San Juan Trail just south of Blue Jay Campground, 2.5km SE Los Pinos Peak. 980 Comment
  RSA743373  Filago californica Fred M. Roberts 2008-4-9 6853 Orange Dana Point: Dana Point Headlands, CNLM Preserve near Outlook 2, 0.7 km W Marine Institute (Dana Point Harbor). 52 Comment
  RSA588652  Filago californica Fred M. Roberts, Carol A. Roberts 1990-5-23 4657 Orange Santa Ana Mts.: West Fork, Upper Long Canyon, Main Divide Truck Trail, 4.3 km SE Los Pinos Peak. 753 Comment
  UCR128406  Filago gallica Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5722 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  UCR128422  Filago gallica Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5792 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 470 Comment
  RSA542430  Filago gallica Fred M. Roberts, K. Keane 1988-5-25 3978 Orange Rancho Mission Veijo: Lower Canada Chiquita, 2.5 kilometers SSE Medium Rancho Survey Marker. 85 Comment
  RSA542431  Filago gallica Fred M. Roberts, Gordon Marsh, Karlin G. Marsh 1988-4-26 3938 Orange San Joaquin Hills: Pelican Hill, 0.5 kim SE Summit. 165 Comment
  SD192199  Foeniculum vulgare Fred Roberts 2006-7-6 6365 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  UCSB48223  Foeniculum vulgare Roberts, Fred 1981-6-22 Orange Rancho Mission Viejo; Calif. Rte. 74, 5.2 km. ENE San Juan Capistrano by road 100 Comment
  IRVC22882  Frankenia salina Fred M. Roberts 1985-6-12 1891 Orange Laguna Niguel: Alicia Pkwy, 2.1km by road SW La Paz Rd., 1.0km W Sulphur Creek Reservoir. Southern Coastal 67 Comment
  IRVC24106  Frankenia salina Fred M. Roberts 1985-9-6 2220 Orange Laguna Beach; Sycamore Hills along Laguna Cyn Rd; N of jct with El Toro Road. Southern Coastal 75 Comment
  RSA539403  Frankenia salina Fred M. Roberts Jr., Karen Swirsky 1988-6-28 4106 Orange Costa Mesa; Fairview Park, Just west of end of Canyon Drive, 0.1 km W Canyon School. 24 Comment
  RSA725530  Fraxinus uhdei Fred M. Roberts 2007-9-11 6574 Orange Aliso Viejo: tributary to Aliso Creek on west side of Moulton Pkwy., 0.2 km N Aliso Viejo Pkwy., adj. to Kinder Care Learning Center. 83 Comment
  UCR220094  Fritillaria agrestis Fred M. Roberts, Carol A. Roberts 2009-5-2 6936 Ventura Transverse Ranges, Wagon Wheel Canyon, along Lockwood Valley Road, c. 6.3 km west of Mutau Flat Road 1493 Comment
  RSA749488  Fritillaria biflora Fred M. Roberts, Linda Farley 2008-3-28 6822 Orange Santa Ana Mtns.: Upper Weir Cyn., east fork along ridge just west of SR241, 3.4 km E Robbers Peak, Irvine Land Conservancy. 457 Comment
  RSA773508  Fritillaria biflora Fred M. Roberts 1999-4-26 5202 Orange Lomas de Santiago: ridge between Santiago Creek wash and Limestone Canyon, 3.8 km W Bee Peak and 1.7 km SSE Silverado School 409 Comment
  UCR209378  Fritillaria biflora Fred M. Roberts, Linda Farley 2008-3-28 6822 Orange Santa Ana Mountains, Upper Weir Canyon, Irvine Ranch Conservancy, east fork along ridge just west of SR 241, 3.4 km east of Robber's Peak 457 Comment
  UCSB36139  Fritillaria biflora Roberts, Dar 1980-3-7 San Luis Obispo 1.1 miles N. S.L.O. Cal Poly campus on slope above rd., Polly Canyon 130 Comment
  RSA773511  Fumaria capreolata Fred M. Roberts, Ian Cain 2010-5-3 7297 Los Angeles Los Angeles Basin Region: Whittier Narrows Dam Recreation Area, Hondo Crek, ca. 0.8 km WSW western shore of Legg Lake and about 0.5 km upstream from San Gabriel Blvd. bridge 61 Comment
  UCR281017  Funastrum cynanchoides var. hartwegii Fred M. Roberts 2016-3-5 7989 Riverside Sonoran (Colorado) Desert, Little Maria Mountains: shallow canyon at west end, 4.3 km east of Palen Pass and 2.0 km WNW Peak "602" 116 Comment
  RSA0013915  Galium angustifolium Fred M. Roberts 2012-5-10 7579 Orange San Joaquin Hills: Buck Gully, south tributary, north slope Pelican Hill, just north of Pelican Hills Drive, 0.7 km N Pelican Hill summit. 154 Comment
  RSA679222  Galium angustifolium Fred M. Roberts 2003-6-25 5949 Orange Santa Ana Mountains: Mojeska Peak in Upper Cold Springs Cyn., north of Main divide Truck Trail, 0.4 km ESE summit. 1471 Comment
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Jan 12 2007
  RSA747595  Galium angustifolium var. angustifolium Fred M. Roberts 2000-5-19 5328 Orange Lomas de Santiago: Loma Ridge, ridge west of Bee Peak above Bee Cyn. landfill, 0.2 km W Bee Peak. 500 Comment
  UCSB47621  Galium aparine Roberts, Fred 1980-4-3 Orange Dana Point: hills, 1.0km NE Dana Hills High School 75 Comment
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Oct 28 2018
  SEINET11762758  Galium hypotrichium J. Robertson, Y. Robertson 1979-7-20 s.n. Mono Rockfield NW of buildings. Site 106. Star City 2591 Comment
  SEINET11762765  Galium hypotrichium J. Robertson, Y. Robertson 1979-7-19 s.n. Mono Silverado Canyon, up mine road, not maintained. Site 100. 2957 Comment
  SD235017  Galium nuttallii Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5737 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana river watershed. 167 Comment
  UCR128379  Galium nuttallii Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5737 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  RSA587868  Galium nuttallii Fred M. Roberts Jr., Carol A. Roberts 1990-5-16 4632 Orange Small canyon along southeast side of Irvine Mesa, 3.5 km N Bolero Lookout. 396 Comment
  RSA704936  Galium nuttallii subsp. nuttallii Fred M. Roberts, David E. Bramlet 2004-4-21 6036 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Shady Canyon, tributary to Cristianitos Cyn., 0.65 km NW Sycamore Gate, 0.70 km W of Cristianitos Road. 148 Comment
  UCR215296  Galium parisiense Fred M. Roberts 2008-5-20 7133 Orange Lomas de Santiago, Loma Ridge, upper Limestone Canyon, 0.8 km NW of Bolero Spring and 3.1 km WNW of Bolero Lookout. Irvine Ranch Conservancy 467 Comment
  SD164422  Galium porrigens var. porrigens Fred M. Roberts 2001-5-23 5473 San Diego San Ysidro Mtns.: Otay Lakes S MSCP parcel southeast of Lower Otay Lake, 0.7 km east-northeast Lower Otay Campground. On ridge with west-facing slope on clay loam soil in open, grassy coastal sage scrub (IPB 9/06) 182 Comment
  SBBG68942  Galium wrightii G. Robertson -Aug-1903 957 Unknown San Padro Martir Mtn 1828 Comment
  IRVC24227  Garrya flavescens Fred M. Roberts, Gordon A. Marsh, Karlin G. Marsh 1985-10-1 2287 Orange Santa Ana Mountains; Silverado Canyon, Silverado Truck Trail, 1.5km NW Shrewsbury Spring. Peninsular Ranges 766 Comment
  IRVC24957  Garrya flavescens var. pallida Fred M. Roberts, Gordon A. Marsh 1986-6-6 2931 Orange Santa Ana Mountains; ridge S of Mabey Canyon, just N of Skyline Dr. near Orange County line; 2.7km SE Sierra Peak. Peninsular Ranges 820 Comment
  SJSU1766  Garrya fremontii F. D. Robertson 1956-3-4 Santa Clara Loma Prieta Rd, Santa Cruz Mts 762 Comment
  RSA688864  Gastridium phleoides Fred M. Roberts, David E. Bramlet 2003-4-10 5643 Orange Rancho Mission Viejo: Donna O'Neill Land conservancy, Back Road, ridge between Cristianitos Cyn, and Segunda Deshecha Canada, 1.45km WNW Gato Gate. 216 Comment
  UCSB36121  Gastridium phleoides Roberts, D. 1980-6-7 Santa Barbara 150 yds N of 19 Oaks Campground; Los Padres National Forest 610 Comment
  UCR209335  Gayophytum diffusum Fred M. Roberts, Robt. L. Allen 2008-6-23 7054 Riverside Santa Ana Mountains, Santiago Peak, north slope, Main Divide Truck Trail, 0.4 km north-northeast of summit 1639 Comment
  RSA0014065  Gazania linearis Fred M. Roberts 2008-5-30 7014 Orange Lomas de Santiago: Santiago Creek wash, 0.6 km SSE Silverado Sch., Irvine Ranch Conservancy. 314 Comment
  RSA718969  Gazania linearis Fred M. Roberts, Robert L. Allen 2006-10-8 6411 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 0.3km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  UCR217671  Gazania linearis Fred M. Roberts 2008-5-30 7014 Orange South Coast, Lomas de Santiago, Santiago Creek wash, 0.6 km south southeast of Silverado School, Irvine Ranch Conservancy 314 Comment
  UCR242702  Gazania linearis Fred M. Roberts 2012-5-10 7580 Orange SAN JOAQUIN HILLS: Buck Gully, south tributary, north slope Pelican Hill, just north of Pelican Hills Drive, 0.7 km N Pelican Hill summit 154 Comment
  SD143250  Geranium carolinianum Fred M. Roberts 1997-4-11 4999 San Diego Carlsbad: Upper Encinitas Creek watershed east of Rancho Santa Fe Rd., Fieldstone Southeast, c.a. 5.7km SW Double Peak 88 Comment
  RSA610228  Gilia angelensis Fred M. Roberts, Annie Hoecker, Tony Bomkamp 1997-3-29 4989 Orange Rancho Mission Viejo: Canada Gobernadora, east slope, 1.7 km SW Cliff Survey Mark, 1.7 km N Calif. Rte. 74. 122 Comment
  UCR219853  Gilia angelensis Fred M. Roberts 1999-4-26 5199 Orange Peninsular Range; Santa Ana Mtns., Lomas de Santiago, Loma Ridge, tributary to Santiago Canyon Wash on ridge between Limestone Cyn and the wash, 1.4 km SE Silverado School, 2.7 km north Bolero Lookout 358 Comment
  RSA696142  Gilia capitata Fred M. Roberts, Andy Pinolo, Kam Muri 2003-5-3 5708 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of ridge east of lower Butteweg Canyon along the border trail, Tijuana River watershed. 305 Comment
  RSA749309  Gilia capitata subsp. abrotanifolia Fred M. Roberts 1999-4-22 5195 Orange Lomas de Santiago: ridges between Limestone Cyn. and Santiago Creek wash opposite mouth Williams Cyn., 2.0 km SE Silverado Sch. and 2.2 km NNW Bolero Lookout. 400 Comment
  RSA548866  Gilia capitata subsp. abrotanifolia Fred M. Roberts, Carol A. Roberts 1988-6-2 4029 Orange Santa Ana Mountains: Silverado Canyon. Maple Springs Truck trail. 4.3 km above gate, 1.0 km WSW Bald Peak. 817 Comment
  RSA650677  Gilia latiflora subsp. davyi Jeni L. Roberts 1991-5-10 31 San Bernardino Within Apple Valley City Limits. 2.5 miles N/E of I15 on Highway 18. Comment
  RSA716722  Githopsis diffusa Fred M. Roberts, Robert Allen, Chris Barnhill 2003-4-26 5660 Riverside Upper San Juan Canyon, along San Juan Loop Trail, 0.8 km NNW Upper San Juan Campground. 520 Comment
  RSA588713  Githopsis diffusa subsp. candida Fred M. Roberts 1990-5-22 4637 Orange Santa Ana Mountains; Upper Hot Springs canyon, just west of Falcon Group Camp, 1.9km ESE Los Pinos Peak. 994 Comment
  IRVC28481  Gnaphalium bicolor Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5801 San Diego Otay Mtn; head of cyn 2 miles NW of Otay Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 470 Comment
  IRVC28472  Gnaphalium californicum Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5812 San Diego Otay Mtn; head of cyn 2 miles NW of Otay Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 470 Comment
  RSA588723  Gnaphalium californicum Fred M. Roberts 1990-5-7 4607 Orange Rancho Mission Viejo: Ridge S of Blind Canyon and E of Christianitos Canyon, TRW Lease Holding, 5.0 km NE Clemente Survey Marker 152 Comment
  UCR128864  Gnaphalium californicum Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5812 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 470 Comment
  UCR209658  Gnaphalium californicum Fred M. Roberts 2008-5-16 6986 Orange South Coast, Dana Point Headlands, Center for Natural Lands Mgmt. Preserve north of Marguerita Drive, 0.5 km west-northwest of the Marine Institute, Dana Point Harbor 75 Comment
  RSA688869  Gnaphalium californicum Fred M. Roberts 2003-5-1 5671 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.49km S Gato Gate and just west of Cristianitos Rd. (San Clemente) 84 Comment
  RSA688984  Gnaphalium canescens subsp. microcephalum Fred M. Roberts, David E. Bramlet 2003-4-10 5642 Orange Rancho Mission Viejo: Donna O'Neill Land conservancy, Back Road, ridge between Cristianitos Cyn, and Segunda Deshecha Canada, 1.45km WNW Gato Gate. 216 Comment
  RSA704430  Gnaphalium leucocephalum Fred M. Roberts, David E. Bramlet 2004-7-30 6087 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn. along Cristianitos Ck., 1.1 km SSW Gato Gate and 0.32km W Cristianitos Road. 73 Comment
  UCR126410  Gnaphalium leucocephalum Fred M. Roberts 2003-7-24 5963 Orange South Coast, San Juan Capistrano, San Juan Creek, c. 0.1 km NE of La Novia Bridge 27 Comment
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Jun 4 2013
  RSA701689  Gnaphalium luteoalbum Fred M. Roberts, David E. Bramlet 2003-6-6 5899 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, west slopes of Cristianitos Canyon, 0.86 km SSW Gato Gate and 0.39 km W of Cristianitos Road. 149 Comment
  RSA718964  Gnaphalium luteoalbum Fred M. Roberts, Robert L. Allen 2006-10-8 6416 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 0.3km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  RSA731658  Gnaphalium luteoalbum Fred M. Roberts 2007-10-29 6621 Orange Niguel Hill: Laguna Niguel, Seaview Park, 1.3 km ENE Aliso Peak. 265 Comment
  RSA666098  Gnaphalium palustre Fred M. Roberts, Michelle Lee 2001-6-4 5482 Orange Rancho Mission Viejo: Chiquita Ridge, 0.2km WNW Median Rancho Survey Marker. PCR Vernal Pool 4. 218 Comment
  RSA666100  Gnaphalium palustre Fred M. Roberts, Michelle Lee 2001-6-4 5484 Orange Rancho Mission Viejo: Chiquita Ridge, 0.3km WNW Median Rancho Survey Marker. PCR Vernal Pool 4. (Canada Gobernadora. 226 Comment
  RSA650681  Grayia spinosa Jeni L. Roberts, Christine Koller 1991-4-19 11 San Bernardino Within Victorville City Limits. On National Trails Highway, 2.5 miles north of I 15. Comment
  RSA0012753  Grindelia camporum Fred M. Roberts 2012-5-10 7578 Orange San Joaquin Hills: Buck Gully, south tributary, north slope Pelican Hill, just north of Pelican Hills Drive, 0.7 km N Pelican Hill summit. 154 Comment
  SD245630  Grindelia camporum Jim Roberts, Abbyann Sisk 2013-6-20 25 San Diego City of San Diego; Tecolote Canyon Natural Park; Acworth Ave. entrance; plants are approximately 200m south of the entrance on the west side of the trail 15m north of a large Quercus agrifolia 74 Comment
  UCR233742  Grindelia camporum var. bracteosa Fred M. Roberts 2008-6-26 7059 Orange Santa Ana Mtns. Foothills, Lomas de Santiago; Loma Ridge along West Loma Ridge Road, c. 1 km north of Haul Road, 2.5 km NNW of Bee Peak, Irvine Ranch Land Conservancy 382 Comment
  CAS-BOT-BC304511  Grindelia hirsutula Robert Robertson 1954-4-14 77 San Mateo N.W. of Palo Alto Yacht Club 3 Comment
  RSA701808  Gutierrezia sarothrae Fred M. Roberts 2000-6-8 5339 Orange Chino Hills: Yorba Linda, on ridge between Box and Lost Trough Canyons, c.a. 1.2km NE Bench Mark 388 266 Comment
  SEINET12615185  Hackelia floribunda J. Robertson, Y. Robertson 1979-7-18 s.n. Mono North Fork Sweetwater Creek. 2804 Comment
  RSA0066587  Harpagonella palmeri Fred M. Roberts, David Bramlet 2003-5-1 5691 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.56 km SSW Gato Gate and 0.21 km W of Cristianitos Rd. 111 Comment
  SD143268  Harpagonella palmeri Fred M. Roberts 1997-4-11 5003 San Diego Carlsbad, upper Encinitas Creek watershed east of Rancho Santa Fe Rd., Fieldstone Southease ca 5.7 km southwest of Double Peak 88 Comment
  SD148663  Harpagonella palmeri Fred M. Roberts 2001-4-6 5392 San Diego La Zanja Canyon, 1.2 km southwest Doug Survey Marker north of Carmel Valley Road. 121 Comment
  SD148665  Harpagonella palmeri Fred M. Roberts 2001-4-27 5446 San Diego Ridge above Lusardi Creek below La Jolla Valley, ca. 2.1 km eastsoutheast confluence with San Dieguito River. 78 Comment
  SD148666  Harpagonella palmeri Fred M. Roberts 2001-3-16 5380 San Diego Sorrento Valley, ca. 0.7 km northwest Scripps Memorial Hospital at edge of business park east of Science Center Dr. and north of Genesee northwest of Genesee/I-5 interchange. 91 Comment
  SD164524  Harpagonella palmeri Fred M. Roberts 2001-4-19 5436 San Diego Lusardi Creek MSCP parcel: Mesas north of Lusardi Creek, 1.2 km NE Low South Survey Marker. E-facing slope on a rocky clay lens dominated by native grassland and surrounded by coastal sage scrub. 91 Comment
  SD220261  Harpagonella palmeri Fred Roberts 2009-3-19 6788 San Diego Oceanside: Loma Alta Mtn., near end of Wooster Dr. and 0.1 km N Joseph Sepulveda Park [San Luis Rey Quad: UTM 11S 04 72 312mE 36 73 446mN]. 95 Comment
  RSA0066583  Harpagonella palmeri Fred M. Roberts, Tony Bomkamp 1997-3-13 4981 Orange Rancho Mission Viejo: Christianitos Canyon, 4km ESE Viejo Survey Mark. 155 Comment
  RSA0066585  Harpagonella palmeri Fred M. Roberts 1993-4-23 4855 Orange Mission Viejo: Mesa just W of Bridgeton Road near jct. of Ridgemark above Arroyo Trabuco, 4.8 km NNE Trabuco Survey Marker. 152 Comment
  RSA0066588  Harpagonella palmeri Fred M. Roberts, Carol A. Roberts, Dave Bontrager 1990-4-28 4587 Orange Rancho Mission Viejo: Christianitos Canyon, 4.0 km E Playa Survey Marker. 174 Comment
  SD253650  Hazardia berberidis Jim Roberts 2014-2-18 54 San Diego City of San Diego; Del Cerro; Navajo Canyon Open Space; near 200 yards NNW of intersection Spear Street and Lance Street 77 Comment
  UCR128383  Hedypnois cretica Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5733 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  CAS-BOT-BC306840  Helenium bigelovii D. C. Roberts 1905-8-1 s.n. Tuolumne Unspecified Comment
  RSA725583  Helianthemum scoparium Fred M. Roberts, Robert L. Allen, Trish Smith 2007-6-15 6530 Orange dirt road along ridge between Black Star and Fremont Canyons, 4.4km ENE Irvine Lake spillway and 2.4km WSW Hidden Ranch. 662 Comment
  UCSB52881  Helianthemum scoparium Roberts, Fred 1983-4-9 Orange South Laguna: Niguel Hill; 0.8 km. ESE Aliso Peak; 2.7 km. SW Alicia Fire Station 249 Comment
  IRVC20494  Helianthemum scoparium var. vulgare Fred M. Roberts 1983-5-4 1029 Orange Temple Hill, Upper Rancho Laguna Canyon, 1.7km SSW Top of the World Sch.; 1.4km ENE Cactus Point, Laguna Beach 200 Comment
  RSA0027431  Helianthus annuus Fred M. Roberts 2013-7-18 7665 Orange San Joaquin Hills: Newport Beach, Buck Gully, along Buck Gully Trail, about 0.7 km from the north terminus of Poppy Street and 1.8 km WNW summit of Pelican Hill. 52 Comment
  RSA725463  Helianthus annuus Fred M. Roberts 2007-8-6 6554 Orange San Joaquin Hills: Laguna Beach, Laguna Cyn. on east side of Laguna Cyn. Rd. adj. to dog park, 1.2 km S (air) from El Toro Road and 1.8 km WSW Moulton Survey Mk. 52 Comment
  RSA725574  Helianthus gracilentus Fred M. Roberts, Robert L. Allen, Trish Smith 2007-6-15 6531 Orange dirt road along ridge between Black Star and Fremont Canyons, 4.4km ENE Irvine Lake spillway and 2.4km WSW Hidden Ranch. 662 Comment
  UCSB48091  Heliotropium curassavicum Roberts, Jr., Fred 1981-5-2 Orange Mission Viejo: Camino Capistrano, 1.7km N Crown Valley Parkway 49 Comment
  RSA752718  Heliotropium curassavicum var. oculatum Fred M. Roberts 2009-4-21 7157 Orange Dana Point Headlands: southern cliffs, 0.7 km W Marine Institute at Dana Point Harbor. CNLM Dana Point Preserve. 3 Comment
  UCSB39581  Helminthotheca echioides Roberts, Fred; Fritzke, Sue 1981-11-7 Santa Barbara Junction of old fire road and Pt. Sal Road; Point Sal State Beach 326 Comment
  IRVC20825  Hemizonia fasciculata Fred M. Roberts 1982-7-30 785 Orange Niguel Hill, 0.9km ENE Aliso Peak, Laguna Niguel 260 Comment
  RSA678737  Hemizonia fasciculata Fred M. Roberts, Carol A. Roberts, Robert Allen 2003-5-11 5858 Orange Dana Point Headlands: hilltop, 0.6km SSW Richard Henry Dana School south of Pacific Coast Highway and north of Scenic Drive. 73 Comment
  UCR209334  Hemizonia fasciculata Fred M. Roberts 2008-7-10 7064 Orange South Coast, Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8 km west-northwest of Marine Institute, Dana Point Harbor 65 Comment
  UCR209343  Hemizonia fasciculata Fred M. Roberts 2008-4-22 6922 Orange Lomas de Santiago, Loma Ridge, Lower Hicks Canyon, along Haul Road near asphalt plant, 2.2 km east-northeast of Rattlesnake Reservoir Dam and 2.2 km west-northwest of Bee Peak, Irvine Ranch Conservancy 188 Comment
  RSA542438  Hemizonia paniculata Fred M. Roberts 1988-5-25 3877 Orange Ranch Mission Viejo: Lower Canada Chiquita, 2.0 kilometers SSE Medium Rancho Survey Mark. 88 Comment
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Apr 29 2020
  RSA594814  Hemizonia paniculata Fred M. Roberts 1993-6-30 4886 Orange Aliso-Woods Regional Park: Temple Hill, adjacent to Multon Meadows Park, 0.7 km SSE Close Survey Marker. 253 Comment
  RSA665419  Hemizonia paniculata Fred M. Roberts, Karen Swirsky 1988-6-28 4104 Orange Rancho Mission Viejo: Tributary to Arroyo Trabuco, 5.9km NNE Trabuco Survey Mark 171 Comment
  UCR209328  Hemizonia paniculata Fred M. Roberts 2009-9-10 7160 Riverside Murrieta, Murrieta Hot Springs along Murrieta Hot Springs Road, c. 0.6 km by road northwest of the junction with Winchester Road 345 Comment
  IRVC25204  Hemizonia parryi subsp. australis Fred M. Roberts 1986-11-4 3199 Orange Anaheim Bay, north of Hog Island, Seal Beach Naval Weapons Station 0 Comment
  UCR114639  Hemizonia pungens subsp. laevis Fred M. Roberts 1992-8-5 4846 Riverside Anza Valley, Cahuilla Indian Reservation, near northern edge 1170 Comment
  UCR162884  Hemizonia pungens subsp. laevis Fred M. Roberts 1993-5-16 4883 Riverside Hemet, W side of Old Warren Road, c. 0.75km N Florida Avenue near Devonshire Road, c. 1.2km WSW summit of Tres Cerritos Hills 459 Comment
  UCR162935  Hemizonia pungens subsp. laevis Fred M. Roberts, D. E. Bramlet 2005-4-1 6146 Riverside Upper Salt Creek, W of Hemet, parcel between Devonshire and Florida, c. 0.2km N of Florida and 0.2km W San Diego Aquaduct; c. 2km NW Ryn Field 457 Comment
  SD148669  Hesperevax sparsiflora var. sparsiflora Fred M. Roberts 2001-4-27 5442 San Diego Ridge above Lusardi Creek below La Jolla Valley, ca. 2.1 km eastsoutheast confluence with San Dieguito River. 78 Comment
  RSA0119678  Hesperocnide tenella Fred M. Roberts 2015-3-10 7927 Orange San Joaquin Hills: Niguel Hill, on ridge above Aliso Canyon ear end of Ceanothus Drive (Hangover House property), 0.4 km WNW summit Aliso Peak. 122 Comment
  RSA542350  Hesperocnide tenella Fred M. Roberts Jr., W. R. Ferren 1987-4-8 3361 Orange Newport Beach: Upper Newport Back Bay, west side, North Star Beach, 0.8 km N Coney Island. 0 Comment
  UCSB52949  Hesperocnide tenella Roberts, Fred; Allen, R. 1983-3-27 Orange Dana Point Headlands: above Dana Strand Beach, 0.9km W Dana Point Harbor; 1.0km SW Richard Henry Dana School 40 Comment
  RSA0072402  Heteromeles arbutifolia Fred M. Roberts, B. Allen, D. Olsen 2007-1-19 6505 Orange Beek's Place along Main Divide Rd., 4.1 km NW Pleasant Peak. 852 Comment
  RSA0072404  Heteromeles arbutifolia Fred M. Roberts, Robert L. Allen 2004-1-16 6020 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.56 km SSW Gato Gate and 0.15 km W of Cristianitos Rd. 92 Comment
  SD256646  Heteromeles arbutifolia Jim Roberts 2015-3-16 108 San Diego Fallbrook; Gird Valley Preserve; west of Golf Course parking area; 0.16 miles WSW of junction Gird Road and Casablanca Way; at edge of greens. 110 Comment
  UCR223957  Heteromeles arbutifolia Fred M. Roberts 2008-4-9 6884 Orange South Coast, Dana Point, Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8 km west northwest of Marine Institute, Dana Point Harbor 65 Comment
  RSA0072397  Heteromeles arbutifolia Fred M. Roberts 1986-11-5 3204 Orange Santa Ana Mts.: Upper Mabey Canyon near top of Skyline Dr., 2.7 km SE Sierra Peak, NE of Oak Flat. 850 Comment
  IRVC21773  Heterotheca grandiflora Fred M. Roberts 1984-11-27 1438 Orange Novia St. bridge over San Juan Creek, 0.6km S Bench Mark 133, San Juan Capistrano 31 Comment
  RSA0075823  Heterotheca grandiflora Fred M. Roberts, David E. Bramlet 2003-6-20 5919 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, tributary to Cristianitos Cyn., along Back Road, 1.48 km WNW Sycamore Gate. 189 Comment
  UCR223954  Heterotheca grandiflora Fred M. Roberts, Carol A. Roberts 2008-9-28 7110 Orange South Coast, Dana Point, Dana Point Headlands, CNLM Preserve near northeast Gate, 0.5 km west Marine Institute, Dana Point Harbor 75 Comment
  UCR281014  Hilaria rigida Fred M. Roberts 2016-3-5 7988 Riverside Sonoran (Colorado) Desert, Little Maria Mountains: west end, 4.3 km E Palen Pass and 2.2 km W 'Peak 602" 113 Comment
  RSA702204  Hirschfeldia incana Fred M. Roberts, David E. Bramlet 2003-6-20 5921 Orange Rancho Mission Viejo: Donna O Neill Land Conservancy, tributary to Christianitos Cyn, along Back Road, 1.48 km WNW Sycamore Gate. 189 Comment
  RSA743501  Hirschfeldia incana Fred M. Roberts 2008-7-10 7077 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 65 Comment
  RSA542405  Holodiscus discolor var. franciscanus Fred M. Roberts Jr., R. E. Riefner 1988-7-19 4120 Orange Modjeska Peak, west slope, along old abandoned road, 0.2 km west summit 1592 Comment
  CAS-BOT-BC459661  Holodiscus dumosus subsp. saxicola Robertson 1974-10-18 s.n. Nevada Humboldt Natl. Forest. 1/10 mi. above N.F. Gate on Singas Creek 1737 Comment
  RSA615545  Holodiscus microphyllus Fred M. Roberts Jr., Kirsten Winter, Leanne Naue 1997-6-5 5039 Orange Costa Mesa; Fairview Park, Just west of end of Canyon Drive, 0.1 km W Canyon School. 24 Comment
  UCSB47956  Hordeum brachyantherum subsp. californicum Roberts, Dar 1980-5-4 Orange .8 km North Northern tip of Thunderbird Homes, Dana Point 61 Comment
  UCR162940  Hordeum depressum Fred M. Roberts, D. E. Bramlet 2005-4-1 6147 Riverside Upper Salt Creek, W of Hemet, parcel between Devonshire and Florida, c. 0.2km N of Florida and 0.2km W San Diego Aquaduct; c. 2km NW Ryn Field 457 Comment
  UCR211706  Hordeum depressum Fred M. Roberts, Michelle Balk 2006-5-2 6329 Riverside San Jacinto Valley, Hemet, Stoney Mountain Preserve, 1.0 km north of the summit of Tres Cerritos Hills and 0.4 km southeast of the junction of Warren Road and Esplanade Road 458 Comment
  UCR211707  Hordeum depressum Fred M. Roberts, Michelle Balk 2006-5-2 6328 Riverside San Jacinto Valley, Hemet, Stoney Mountain Preserve, 1.0 km north of the summit of Tres Cerritos Hills and 0.4 km southeast of the junction of Warren Road and Esplanade Road 458 Comment
  UCR211715  Hordeum depressum Fred M. Roberts, Melissa Riedel-Lehrke 2006-4-18 6319 Riverside Perris Basin, San Jacinto Valley, west of Hemet, along west side of Warren Road, 0.1 km north-northwest of the junction of Warren Road and Esplenade Road, 1.5 km north-northwest of the summit of Tres Cerritos Hills 453 Comment
  UCR114962  Hordeum intercedens Fred M. Roberts 1992-4-25 4876 Riverside San Jacinto Valley, Upper Salt Creek Watershed adjacent to Hemet, NW corner of California Avenue and Stowe Road, 3.3km ENE Winchester 455 Comment
  UCR211731  Hordeum intercedens Fred M. Roberts, D. E. Bramlet 2005-5-5 6179 Riverside Perris Basin, San Jacinto Valley, along MWD canal just north of Devonshire Road and west of Warren Road 458 Comment
  UCR114964  Hordeum marinum subsp. gussoneanum Fred M. Roberts 1992-4-25 4877 Riverside San Jacinto Valley, Upper Salt Creek Watershed adjacent to Hemet, NW corner of California Avenue and Stowe Road, 3.3km ENE Winchester 455 Comment
  UCR162936  Hordeum marinum subsp. gussoneanum Fred M. Roberts, D. E. Bramlet 2005-4-1 6144 Riverside Upper Salt Creek, W of Hemet, parcel between Devonshire and Florida, c. 0.2km N of Florida and 0.2km W San Diego Aquaduct; c. 2km NW Ryn Field 457 Comment
  RSA542550  Hordeum murinum subsp. leporinum Fred M. Roberts 1988-3-4 3810 Orange Anaheim, along Atchison Topeka RR parallel to Vine St., south of Broadway St., UTM 3743900m N, 416300m E 50 Comment
  UCSB43415  Hordeum murinum subsp. leporinum Roberts, Dar 1982-3-25 Santa Barbara Fraser Point, Santa Cruz Island 6 Comment
  RSA795552  Hordeum vulgare var. trifurcatum D. Roberts 1983-5-1 LP- 418 Santa Barbara West valley road, west of road from mesa. La Purisima Mission State Historic Park: 2 km northeast of Lompoc City Limit. Comment
  CAS-BOT-BC532059  Horkelia californica var. frondosa Robert Robertson 1954-5-8 142 Monterey E. of Carmel Cove, Point Lobos 9 Comment
  IRVC20520  Horkelia cuneata subsp. puberula Fred M. Roberts 1983-9-26 1114 Orange Lion Canyon, Chiquito Basin Trail, 3.3km NNE Lower San Juan Picnic Ground; 4.3km SSE Los Pinos Peak. Santa Ana Mountains 810 Comment
  RSA649010  Hymenoclea salsola Jeni L. Roberts 1991-5-5 23 San Bernardino Within Victorville City Limits. 2.5 miles N/W of I-15 on National Trails Highway. Comment
  UCSB52437  Hymenoxys acaulis Roberts, Fred 1982-5-15 San Bernardino New York Mtns.; mouth of Keystone Canyon at jct. of Ivanpah and Keystone Canyon Rds. 1614 Comment
  SEINET11259504 Image available Hymenoxys cooperi J. H. Robertson, Y. Robertson 1979-7-19 s.n. Mono Sweetwater Mountains 2987 Comment
  SEINET11259505 Image available Hymenoxys cooperi J. H. Robertson, Y. Robertson 1974-7-18 s.n. Mono Sweetwater Mountains. Across creek from barren, steep, rocky canyon side, along trail up no. fork of Sweetwater Cr. Site 96. 2774 Comment
  SEINET11259558 Image available Hymenoxys hoopesii J. H. Robertson, Y. Robertson 1979-7-18 s.n. Mono Sweetwater Mountains. Site 97. 2743 Comment
  RSA747629  Hypericum canariense Fred M. Roberts 2008-5-8 6946 Orange Dana Point: Dana Point Headlands, CNLM Preserve near NE Gate, 0.5km W Marine Institute (Dana Point Harbor). 75 Comment
  UCSB56516  Hypericum canariense Roberts, Fred 1983-5-26 Orange Dana Point Headlands; 0.5km NW Dana Point Harbor; 0.4km S Richard Henry Dana School; on south side of Pacific Coast Highway 22 Comment
  RSA685932  Hypochaeris glabra Fred M. Roberts, David E. Bramlet 2003-3-27 5615 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, western slopes of Chistianitos Canyon, 0.8km N Sycamore Gate 0.15km W Cristianitos Road; (San Clemente). 139 Comment
  RSA743384  Hypochaeris glabra Fred M. Roberts 2008-5-27 7008 Orange Dana Point: Dana Point Headlands, CNLM Preserve near NE Gate, 0.5 km W Marine Institute (Dana Point Harbor). 75 Comment
  RSA747712  Hypochaeris glabra Fred M. Roberts 2008-4-9 6867 Orange Dana Point: Dana Point Headlands, CNLM Preserve near Outlook 2, 0.7 km W Marine Institute (Dana Point Harbor). 52 Comment
  UCSB47577  Hypochaeris glabra Roberts, Jr., Fred 1980-4-3 Orange San Juan Canyon, Hwy. 74, entrance to lower San Juan Picnic Grounds, Santa Ana Mtns. 409 Comment
  RSA678498  Hypochaeris radicata Fred M. Roberts, Robert Allen, Carol Roberts 2003-5-11 5844 Orange Dana Point Headlands: 0.8km SSW Richard Henry Dana School north of Marguerita Drive 76 Comment
  UCSB52912  Hypochaeris radicata Roberts, Fred; Marsh, K. 1983-5-13 Orange Laguna Beach; Sycamore Hills, central ridge, 1.3 km. NE jct. El Toro and Laguna canyon Rds.; 5.6 km. ESE Signal Peak 155 Comment
  SEINET8752736  Iris hartwegii J. Robertson 1983-6-10 s.n. Plumas Plumas N.F. Comment
  UCSB53011  Iris missouriensis Roberts, Dar; Wilson, C. 1983-7-23 Inyo Red Willow Dam; 2 miles N of jet of Fish Slough Rd and Jean Blanc Rd; FISH SLOUGH: a desert wetland system 4.5 mi. north of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis 1341 Comment
  OBI78721  Isocoma menziesii Fred M. Roberts, with Michelle L/ Balk 2011-11-21 7476 San Diego Chula Vista: south forl, Rice Canyon east of Paseo Del Rey jesuy SE jct. with H Street. (11S -04 97 293mE, 36 10 847mN) Comment
  SD242484  Isocoma menziesii Fred Roberts, Michelle Balk 2011-11-21 7475 San Diego Chula Vista; East of Paseo Del Rey, just SE of jct. with East H Street. National City USGS 7.5min quad. UTM 11S 04 97 293mE, 36 10 847mN. 75 Comment
  SD242480  Isocoma menziesii var. decumbens Fred Roberts, Michelle Balk 2011-11-21 7478 San Diego Chula Vista: the southern foot of San Miguel Mtn., just beyond the northern terminus of Hunte Pkwy. And Salt Creek Golf Course, 0.7 km E the summit of Mother Miguel Mtn. Jamul Mtns. 7.5min USGS Quad, UTM 11S 05 04 116mE, 36 16 180mN. 295 Comment
  SD242481  Isocoma menziesii var. menziesii Fred Roberts, Michelle Balk 2011-11-21 7473 San Diego San Diego; Oak Park; entrance to Chollas Community Park, near corner of College Grove Dr. and Chollas Station Rd., and about 0.6km W Chollas Reservoir spillway. National City USGS 7.5min quad. 131 Comment
  UCR247911  Isocoma menziesii var. menziesii Fred M. Roberts 2012-9-6 7694 Orange SAN JOAQUIN HILLS: Buck Gully, Buck Gully Trail, west end near Poppy Street entrance, 2.1 km WNW Pelican Hill summit. 37 Comment
  RSA743473  Isocoma menziesii var. sedoides Fred M. Roberts 2008-10-9 7123 Orange Dana Point: Dana Point Headlands, CNLM Preserve, at base of cliff adjacent to Dana Strands Beach, 0.8km WNW Marine Institute (Dana Point Harbor). 3 Comment
  IRVC25168  Isocoma menziesii var. vernonioides Fred M. Roberts, B. Fugle 1986-10-1 3145 Orange Laguna Hills; creek channel along Cabot Rd. ca. 1.0km N Pacific Park Pkwy. Southern Coastal 99 Comment
  RSA731649  Isocoma menziesii var. vernonioides Fred M. Roberts 2007-10-29 6630 Orange Laguna Beach: Temple Hill, Nyes Place, ca. 0.2 km S Moulton Meadows Park. 232 Comment
  RSA743518  Isocoma menziesii var. vernonioides Fred M. Roberts, Carol A. Roberts 2008-9-28 7114 Orange Dana Point: Dana Point Headlands, CNLM Preserve near NE Gate, 0.5 km W Marine Institute (Dana Point Harbor). 75 Comment
  SD194898  Isocoma menziesii var. vernonioides Fred Roberts 2006-7-6 6376 B San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  UCSB48038  Isocoma menziesii var. vernonioides Roberts, Jr., Fred 1981-9-26 Orange Irvine Ranch; Pacific Coast Highway, 0.9 km. SE El Moro School near mouth of Moro Cyn. 15 Comment
  UCSB50641  Isolepis cernua Roberts, Fred; Allen, R. 1982-7-4 Orange Chino Hills: Tonner Canyon; 1.0 km. by road E jct. 57; 1.1 km. SE Bench Mark 499 165 Comment
  UCR239636  Isomeris arborea var. arborea Fred M. Roberts 2012-4-24 7504 Orange San Joaquin Hills, Buck Gully, west of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km west of Signal Peak 179 Comment
  RSA0042765  Iva hayesiana Fred M. Roberts 2012-7-18 7670 Orange SAN JOAQUIN HILLS: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus of Poppy Street and 2.1 km WNW summit of Pelican Hill. 37 Comment
  SD164550  Iva hayesiana Fred M. Roberts 2001-7-20 5498 San Diego San Ysidro Mtns.: NW foothills just SE of Otay Lake, 2.0 km ENE Savage Dam along unnamed canyon above Buschalaugh Cove, Otay Mesa Along narrow rocky flowing stream course on gravelly soil 174 Comment
  RSA588852  Jepsonia parryi Fred M. Roberts Jr. 1989-11-7 4451 Orange Rancho Mission Viejo: TRW Lease Holding, ridge south of the confluence of Gabino and Blind Canyons, 5.0 km NE Clemente Survey Marker 155 Comment
  RSA542507  Jepsonia parryi Fred M. Roberts Jr., Bernard Jaroslow 1987-11-23 3757 Orange San Joaquin Hills: Sycamore Hills above El Toro Canyon, ca. 2.7 km NNW Moulton Peak. 152 Comment
  UCR247895  Juglans californica Fred M. Roberts 2013-8-9 7802 Orange Peninsular Ranges, SANTA ANA MTNS.: Lower Silverado Canyon along Silverado Creek on north side of Silverado Canyon Road, 0.8 km ENE Silverado School and 1.5 km up stream Black Star Road crossing. 325 Comment
  RSA542477  Juglans californica var. californica Fred M. Roberts, Karlin Marsh 1988-4-25 3929 Orange San Joaquin Hills: Irvine Coast, 1.1 km SW Pelican Hill. 44 Comment
  RSA542517  Juncus acutus subsp. leopoldii Fred M. Roberts, W. Ferren 1987-4-8 3358 Orange Upper Newport Beach Back Bay, west side, North Star Beach, 0.8 km N Coney Island. 0 Comment
  SD164588  Juncus acutus subsp. leopoldii Fred M. Roberts 2001-5-10 5453 San Diego Lusardi Creek MSCP parcel, canyon north of Lusari Creek, 1.1 km northeast Low South Survey Marker. 42 Comment
  SD164589  Juncus acutus subsp. leopoldii Fred M. Roberts 2003-5-7 5823 San Diego Hollenbeck Ranch Preserve, Hollenbeck Canyon, 2.8 km southeast Jamul Butte; (Delzura). Growing in canyon bottom on loamy soil along rocky stream course. 242 Comment
  RSA0014067  Juncus arcticus var. balticus Fred M. Roberts, R. E. Riefner 2010-5-30 7021 Orange Lomas de Santiago: Loma Ridge, Hanging Man s Tree Cyn., along Hanging Man s Tree Cyn. Rd., c.a. 0.4km W Santiago Cyn. Rd., and 1.2 km N Bolero Lookout. 372 Comment
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Sep 21 2020
  UCR217670  Juncus arcticus var. balticus Fred M. Roberts, R. E. Riefner Jr. 2008-5-30 7021 Orange South Coast, Lomas de Santiago, Loma Ridge, Hanging Man's Tree Canyon, along Hanging Man's Tree Canyon Road, c. 0.4 km west of Santiago Canyon Road and 1.23 km north of Bolero Lookout 372 Comment
  RSA731916  Juncus balticus var. balticus Fred M. Roberts, Sandy Leatherman 2007-11-27 6663 Orange Anaheim: Santa Ana River, Santa Ana Canyon, just west of Horseshoe Bend on S side of E La Palma Ave., about 0.3km E Weir Cyn. Rd. bridge. 100 Comment
  UCR162937  Juncus bufonius Fred M. Roberts, D. E. Bramlet 2005-4-1 6150 Riverside Upper Salt Creek, W of Hemet, parcel between Devonshire and Florida, c. 0.2km N of Florida and 0.2km W San Diego Aquaduct; c. 2km NW Ryn Field 457 Comment
  RSA542516  Juncus bufonius Fred M. Roberts 1987-3-31 3300 Orange Lomas de Santiago: Lomas [Loma] Ridge, upper Serrano Canyon, east fork, reservoir, 2.7 kilometers SE Bolero Lookout. 350 Comment
  RSA678522  Juncus bufonius var. bufonius Fred M. Roberts, M. Lee, Kristen Szabo 2001-4-13 5427 Orange Rancho Mission Viejo: South of San Juan Creek, 0.6km WNW Median Rancho Survey Marker. PCR Vernal Pool 2. 183 Comment
  RSA701811  Juncus bufonius var. bufonius Fred M. Roberts, David E. Bramlet 2003-6-6 5903 Monterey Rancho Mission Viejo: Donna O Neill Land Conservancy, west slopes of Cristianitos Canyon, 0.86 km SSW Gato Gate and 0.39 km W of Cristianitos Road Comment
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Oct 28 2018
  UCSB34442  Juncus bufonius var. bufonius Roberts, Fred 1980-4-25 San Luis Obispo At end of Bridge Street in the Cambria Pine Forest; north of Cambria 152 Comment
  SD135148  Juncus dubius Fred M. Roberts, Arthur Davenport 1993-7-25 4893 San Diego Carlsbad, Arroyo la Costa, just northeast of Mission Estancia Road, 5.1 km southwest Lake Marcos Dam. Locally abundant on gentle, east-facing slope in seepy ground at edge of southern maritime chaparral. 67 Comment
  UCR217669  Juncus effusus subsp. austrocalifornicus Fred M. Roberts, R. E. Riefner Jr. 2008-5-30 7022 Orange South Coast, Lomas de Santiago, Loma Ridge, Hanging Man's Tree Canyon, along Hanging Man's Tree Canyon Road, c. 0.4 km west of Santiago Canyon Road and 1.23 km north of Bolero Lookout 372 Comment
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Sep 21 2020
  RSA0014071  Juncus macrophyllus Fred M. Roberts, R. E. Riefner 2010-5-30 7024 Orange Lomas de Santiago: Loma Ridge, Hanging Man s Tree Cyn., along Hanging Man s Tree Cyn. Rd., c.a. 0.4km W Santiago Cyn. Rd., and 1.2 km N Bolero Lookout. 372 Comment
  UCR217667  Juncus macrophyllus Fred M. Roberts, R. E. Riefner Jr. 2008-5-30 7024 Orange South Coast, Lomas de Santiago, Loma Ridge, Hanging Man's Tree Canyon, along Hanging Man's Tree Canyon Road, c. 0.4 km west of Santiago Canyon Road and 1.23 km north of Bolero Lookout 372 Comment
  UCSB47985  Juncus macrophyllus Roberts, Fred 1980-6-25 Orange Santa Ana Mtns; San Juan Canyon below Calif. Rte. 74; 2.4 km ENE San Juan Guard Station; 0.3 km WSW BM 1100 290 Comment
  RSA0027429  Juncus patens Fred M. Roberts 2013-7-18 7662 Orange San Joaquin Hills: Newport Beach, Buck Gully, along Buck Gully Trail, about 0.7 km from the north terminus of Poppy Street and 1.8 km WNW summit of Pelican Hill. 52 Comment
  UCSB34445  Juncus phaeocephalus Roberts, Fred 1980-5-28 Santa Barbara Atascadero Creek; just east of Patterson road bridge; 3.1 km ne of UCSB 6 Comment
  RSA0014060  Juncus rugulosus Fred M. Roberts, R. E. Riefner 2010-5-30 7134 Orange Lomas de Santiago: Loma Ridge, Hanging Man s Tree Cyn., along Hanging Man s Tree Cyn. Rd., c.a. 0.4km W Santiago Cyn. Rd., and 1.2 km N Bolero Lookout. 372 Comment
  UCSB48197  Juncus rugulosus Roberts, Fred 1981-6-26 Orange Santa Ana Mts; Viejo Cyn; 0.5 km N Calif. Rte. 74; 2.7 km E San Juan Guard Station Comment
  RSA0014070  Juncus textilis Fred M. Roberts, R. E. Riefner 2010-5-30 7023 Orange Lomas de Santiago: Loma Ridge, Hanging Man s Tree Cyn., along Hanging Man s Tree Cyn. Rd., c.a. 0.4km W Santiago Cyn. Rd., and 1.2 km N Bolero Lookout. 372 Comment
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Sep 21 2020
  SD196067  Juncus textilis Fred Roberts 2006-7-6 6357 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  IRVC25628  Juncus torreyi Fred M. Roberts, Karen M. Calloway 1987-7-20 3482 Inyo White Mountains, Silver canyon, Silver canyon Road. 8 km NE Bishop, 2.4 km from Los Positas road at canyon mouth. 1398 Comment
  UCSB36313  Juncus xiphioides Roberts, Fred 1980-5-28 Santa Barbara Vegas Creek; along Fairview Road; 2.0 Km. ne of UCSB; Goleta 5 Comment
  UCSB48006  Juncus xiphioides Roberts, Fred 1980-7-11 Orange Santa Ana Mtns; Viejo Canyon; 3.0 km ENE San Juan Guard Station; 0.7 km N Hwy 74 355 Comment
  RSA588789  Juniperus californica Fred M. Roberts, Dave Bontrager 1990-4-18 4573 Orange Rancho Mission Viejo: ridge between Lower San Juan Canyon and Upper Christianitos Canyon. 3.0 km S Point Rancho Survey Marker 215 Comment
  RSA552937  Keckiella antirrhinoides Fred M. Roberts Jr. 1989-5-9 4339 Orange Santa Ana Mts: Gypsum Canyon, west fork, 5.6 km WNW Sierra Peak, c.a. 1 km S Highway 91. 146 Comment
  UCR128402  Keckiella antirrhinoides Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5727 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  SD233988  Keckiella antirrhinoides var. antirrhinoides Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5727 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed. Canyon bottom along stream course. 167 Comment
  RSA773556  Keckiella cordifolia Fred M. Roberts 2008-6-3 7028 Orange Lomas de Santiago: Loma Ridge, East Fork Rattlesnake Canyon, ca. 2.6 km NE of Rattlesnake Reservoir spillway and 2.4 km ENE Bee Peak 235 Comment
  UCR128409  Keckiella cordifolia Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5718 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  RSA542498  Keckiella ternata subsp. ternata Fred M. Roberts Jr., Richard E. Riefner 1988-7-19 4123 Orange Costa Mesa; Fairview Park, Just west of end of Canyon Drive, 0.1 km W Canyon School. 24 Comment
  RSA718970  Kickxia elatine Fred M. Roberts, Robert L. Allen 2006-10-8 6410 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 0.3km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  RSA730997  Kickxia elatine Fred M. Roberts 2006-11-15 6460 Orange Santa Ana Cyn., 1.0 km ENE Imperial Hwy bridge, between La Palma Ave. and Santa Ana River near Big Springs St. 89 Comment
  RSA683072  Koeleria macrantha Fred M. Roberts 2003-3-13 5592 Orange Donna O'Neill Land Conservancy: Ridge west of Christianitos Canyon, 1,320m NW Sycamore Gate and 880m W Cristianitos Rd., ( 33 deg 29' 32N, 117 deg 34' 18W; [UTM 11S-04 46 917mE, 37 05 804mN 179 Comment
  RSA701952  Koeleria macrantha Fred M. Roberts, David E. Bramlet 2003-6-6 5906 Orange Rancho Mission Viejo: Donna O'Neil Land Conservancy, Cristianitos Cyn along Cristianitos Ck., 1 km SSW Gato Gate and 0.31 km W of Cristianitos Rd. 73 Comment
  RSA708524  Koeleria macrantha Fred M. Roberts, Robert L. Allen, Chris Barnhill, Nancy Hatfield 2005-5-30 6242 Orange Modjeska Peak summit, c.a. 60m south of highest point. 1675 Comment
  RSA749490  Koeleria macrantha Fred M. Roberts, Linda Farley 2008-3-28 6824 Orange Santa Ana Mtns.: Upper Weir Cyn., east fork along ridge just west of SR241, 3.4 km E Robber's Peak, Irvine Land Conservancy. 437 Comment
  RSA725512  Koelreuteria bipinnata Fred M. Roberts 2007-9-11 6563 a Orange Aliso Viejo: tributary to Aliso Creek on west side of Moulton Pkwy., 0.2 km N Aliso Viejo Pkwy., adj. to Kinder Care Learning Center. 83 Comment
  UCR267205  Krameria bicolor Fred M. Roberts, Carol A. Roberts 2014-11-11 7915 San Bernardino Sonoran Desert, Chemehuevi Valley: tributary to Gary Wash at west base of hill with VABM Huevis, 0.2 km E SR 95 and 4.5 km NW Pyramid Butte 387 Comment
  UCSB53032  Krascheninnikovia lanata Roberts, Dar; Ferren, Wayne 1984-4-28 Inyo Fish Slough: desert wetland system 4.5 mi. north of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis; 1.2 miles N of jct. of Fish Slough Rd. and Jean Blanc Rd. on west side of slough 1341 Comment
  SEINET4138589  Krascheninnikovia lanata J. Robertson 1974-6-25 NW 120 -74 Mono 6.3 miles above Hw. Maint. Sta. at Montgomery Pass, NE of Boundary Park 2705 Comment
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Jun 19 2018
  IRVC21694  Lactuca serriola Fred M. Roberts 1984-8-2 1365 Orange UC Irvine, along Adobe Circle Raod, 0.9km ENE campus center; 2.3km W French Hill, Irvine 30 Comment
  RSA0027432  Lactuca serriola Fred M. Roberts 2013-7-18 7666 Orange San Joaquin Hills: Newport Beach, Buck Gully, along Buck Gully Trail, about 0.7 km from the north terminus of Poppy Street and 1.8 km WNW summit of Pelican Hill. 52 Comment
  RSA703140  Lactuca serriola Fred M. Roberts, Art Davenport 2003-9-11 6016 Orange Rancho Mission Viejo: Donna O' Neill Land Conservancy. Cristianitos Cyn., 0.79 km N Sycamore Gate 0.23 km w of Crisianitos Road. 126 Comment
  UCSB57553  Laennecia coulteri Roberts, Fred 1985-8-19 Orange Crystal Cove State Park; Pelican Point, border of old stable site, 0.1 km. from ocean; UTM 3715800mN, 420900mE 20 Comment
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Feb 22 2019
  HSC14214  Lamium purpureum S. J. Roberts 1965-4-10 26 Humboldt Dike of old Mad River channel Comment
  IRVC20365  Lasthenia californica Fred M. Roberts, D. A. Roberts 1983-3-22 933 Orange San Juan Canyon, above Hwy 74, 2.7km ENE San Juan Guard Sta.; 3.6km SSW Sugar Loaf Pk., Santa Ana Mountains 407 Comment
  IRVC25402  Lasthenia californica Fred M. Roberts 1987-4-3 3335 Orange San Joaquin Hills; Irvine; central Shady Canyon, 2.9km NE Signal Hill. Central coastal 107 Comment
  JROH970  Lasthenia californica subsp. californica Robert Robertson 1954-4-23 88 San Mateo Jasper Ridge Biological Preserve, Stanford University 170 Comment
  RSA749293  Lasthenia coronaria Fred M. Roberts 2008-4-22 6921 Orange Lomas de Santiago: Loma Ridge, Lower Hicks Cyn.,along Haul Rd. near asphalt plant, 2.2 km ENE Rattlesnake Reservoir dam and 2.2 km WNW Bee Peak, Irvine Ranch Conservancy. 188 Comment
  UCSB34450  Lathyrus vestitus Roberts, Fred 1980-2-2 Santa Barbara West side of Refugio Road, 17.7 km. north of Highway 101, Santa Ynez Mtns. 545 Comment
  UCR209357  Lathyrus vestitus subsp. vestitus Fred M. Roberts 2008-4-8 6850 Orange Lomas de Santiago, Loma Ridge, Upper Dripping Springs Cnyn, 1.0 km northeast of Bee Peak, Irvine Ranch Conservancy 458 Comment
  SD233830  Lathyrus vestitus var. alefeldii Fred M. Roberts, M. White, D. Flietner 2003-5-4 5796 San Diego Peninsular range, San Ysidro Mtns.:Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242 470 Comment
  SD233832  Lathyrus vestitus var. alefeldii Fred M. Roberts, A. Pigniolo, K. Muri 2003-5-3 5740 San Diego Peninsular range, San Ysidro Mtns.:Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed 167 Comment
  UCSB36159  Lathyrus vestitus var. vestitus Roberts, Dar 1980-2-2 Santa Barbara South slope 11 miles on Refugio Rd. from junction at 101, Santa Ynez Mts. 545 Comment
  IRVC22071  Layia platyglossa Fred M. Roberts, D. A. Roberts 1983-3-22 934 Orange San Juan Canyon, above Hwy 74, 2.7km ENE San Juan Guard Sta.; 3.6km SSW Sugar Loaf Pk., Santa Ana Mountains 407 Comment
  RSA550587  Layia platyglossa subsp. campestris Fred M. Roberts 1989-4-26 4323 Orange Santa Ana Mtns: lower Blind Canyon near mouth, 9.2km SW Sierra Peak, 1km N Irvine Lake spillway. 210 Comment
  UCR211724  Lemna minuscula Fred M. Roberts, Ileene Anderson 2005-5-20 6208 Riverside Perris Basin, San Jacinto Valley, field 0.5 km west of Sanderson Road, 3.2 km southwest of Gilman Hot Springs 446 Comment
  RSA715699  Lemna minuta Fred M. Roberts, Chris M. Barnhill 2005-9-27 6280 Orange San Juan Capistrano: San Juan Creek wash, east of La Novia Road bridge, 1.4km E Mission San Juan Capistrano, 27 Comment
  RSA539348  Lemna minuta Fred M. Roberts, Gordon Marsh 1987-8-31 3589 Orange Santa Ana River: adjacent to Santa Ana. 15 Comment
  RSA588894  Lepechinia cardiophylla Fred M. Roberts, Carol A. Roberts 1990-5-30 4660 Orange Ridge between Upper Hagador Canyon and the West Fork of Ladd Canyon, Main Divide Truck Trail, 0.8km WNW Pleasants Peak. 1122 Comment
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Feb 22 2017
  RSA678524  Lepechinia cardiophylla Fred M. Roberts, D. E. Bramlet 5524 Orange Santa Ana mts.: Main Divide Truck Trail, Upper Indian Cyn., 1.7km W Trabuco Pk. 1268 Comment
  UCR125978  Lepechinia cardiophylla Fred M. Roberts, D. E. Bramlet 2002-6-6 5524 Orange Santa Ana Mtns., Main Divide Truck Trail, Upper Indian Canyon, 1.7 km W Trabuco Peak 1268 Comment
  RSA691031  Lepechinia ganderi Fred M. Roberts 2003-5-4 5800 San Diego San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242. 470 Comment
  SD233868  Lepechinia ganderi Fred M. Roberts 2003-5-4 5800 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi WSW of peak 2242. 470 Comment
  UCR114957  Lepidium dictyotum var. acutidens Fred M. Roberts 1992-4-25 4874 Riverside San Jacinto Valley, Upper Salt Creek Watershed adjacent to Hemet, NW corner of California Avenue and Stowe Road, 3.3km ENE Winchester 455 Comment
  UCR162956  Lepidium dictyotum var. acutidens Fred M. Roberts, D. E. Bramlet 2005-4-1 6152 Riverside Upper Salt Creek, W of Hemet, parcel between Devonshire and Florida, c. 0.2km N of Florida and 0.2km W San Diego Aquaduct; c. 2km NW Ryn Field 457 Comment
  RSA649966  Lepidium fremontii Jeni L. Roberts, Christine Koller 1991-4-29 6 San Bernardino Within Victorville City Limits. On National Trails Highway, 2.5 miles north of I 15. Comment
  RSA743495  Lepidium lasiocarpum Fred M. Roberts 2008-3-19 6783 Orange Dana Point: Dana Point Headlands, CNLM Preserve, 0.8km W Marine Institute, Dana Point Harbor. 45 Comment
  UCR224162  Lepidium lasiocarpum Fred M. Roberts 2008-3-19 6783 Orange South Coast, Dana Point Headlands, Center for Natural Lands Mgmt. Preserve, 0.8 km west of the Marine Institute, Dana Point Harbor 45 Comment
  UCR189293  Lepidium latifolium Fred M. Roberts, S. Leatherman 2007-9-19 6598 Riverside Santa Ana Canyon, Santa Ana River, across from Green River Golf Course, 0.15 km W of Green River Road bridge 128 Comment
  UCSB48030  Lepidium latifolium Roberts, Fred 1980-5-4 Orange Mission Viejo: along Santa Fe Railroad and Camino Capistrano; 1.7 km. N Crown Valley Parkway; 1.1 km. S Bench Mark 316 49 Comment
  IRVC29094  Lepidium nitidum Fred M. Roberts 1989-3-17 4209 Orange Aliso Canyon, 3.3km SSE Moulton Pk. Aliso-Wood Canyon Regional Park 30 Comment
  RSA0127408  Lepidium oblongum Fred M. Roberts 2016-5-20 8060 Orange City of Irvine: San Joaquin Hills, Turtle Rock Community along Ridge Route Road, 1.0 km SE summit of French Hill and just NE intersection with Hillsborough Drive. 122 Comment
  RSA362301  Lepidium pinnatifidum Fred M. Roberts 1985-6-2 1836 Orange San Clemente: El Camino Real, 0.2 km by road WNW Ave Pico. 5 Comment
  RSA703698  Lepidium virginicum var. robinsonii Fred M. Roberts, Arthur Davenport 2004-2-20 6025 Orange Santa Ana Mtns.: San Juan Canyon, SR 74, south side of road, 0.62 km SW San Lower San Juan Picnic Ground; 1.89 km WNW Sitton Peak. 390 Comment
  SD164517  Lepidium virginicum var. robinsonii Fred M. Roberts 2001-5-8 5450 San Diego La Jolla Valley: 4S Ranch MSCP parcel, 0.1 km SW Sol Survey Marker. Relatively steep to very steep S-facing slope in recently burned grassy coastal sage scrub 235 Comment
  SD241398  Lepidium virginicum var. robinsonii Fred Roberts, Michelle Balk, Dave Bramlet, Sarah Thorne 2008-3-5 6711 San Diego Carlsbad: La Costa Greens CNLM Preserve, just west of Alicante Rd., 1.0 km SSE intersection of Palomar Airport Rd. and El Camino Real [Encinitas Quad: UTM 11S 04 75 570mE, 36 64 780mN]. 60 Comment
  SD242572  Lepidium virginicum var. robinsonii Fred Roberts, Carol A. Roberts 2010-3-28 7237 San Diego San Ysidro Mtns.: ridge south of O'Neal Cyn., Otay Mtn. Truck Trail, 3.8 km by air SW Otay Mtn. summit. Otay Mesa USGS 7.5min quad, UTM 11S 05 11 498mE, 36 04 180mN. 537 Comment
  RSA717044  Lepidospartum squamatum Fred M. Roberts, Chris M. Barnhill 2005-9-27 6287 Orange San Juan Capistrano: San Juan Creek wash, east of La Novia Road bridge, 1.4km E Mission San Juan Capistrano. 27 Comment
  RSA712939  Leptochloa fusca subsp. uninervia Fred M. Roberts 2005-10-3 6304 Orange San Juan Capistrano: San Juan Creek wash, La Novia Road Bridge to 100m E of bridge, 1.4km E Mission San Juan Capistrano, 27 Comment
  RSA719404  Leptochloa fusca subsp. uninervia Fred M. Roberts, Robert L. Allen 2006-10-8 6431 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 0.3km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  UCSB48232  Leptochloa fusca subsp. uninervia Roberts, Fred 1981-5-2 Orange Mission Viejo; Camino Capistrano, 1.5 km N Crown Valley Parkway 49 Comment
  UCSB36311  Leptochloa fusca subsp. uninervia Roberts, Dar 1980-5-29 Santa Barbara 50 yds S of bridge on Hollister, closest to Hollister, Fairview Intersection along Vegas-San Pedro creek 4 Comment
  RSA542450  Leptosiphon androsaceus Fred M. Roberts 1988-4-10 3905 Orange Lomas De Santiago: Loma Ridge, Upper Limestone Canyon, c.a. 3.2 kilometer NNW Bolero Lookout. 347 Comment
  RSA587876  Leptosiphon liniflorus Fred M. Roberts 1990-5-9 4625 Orange Rancho Mission Viejo; Christianitos Canyon, TRW Lease Holding, 4.3 km NE Clemente Survey Marker. 91 Comment
  RSA715700  Leptosiphon liniflorus Fred M. Roberts, Robert L. Allen 2005-10-15 6311 Orange entrance to Falcon Group Camp, 2.1km ESE Los Pinos Peak and 0.3km NE campground. 1008 Comment
  RSA550596  Leptosiphon liniflorus Fred M. Roberts 1989-4-26 4318 Orange Mouth of Blind Caynon, 9.4 k SW Sierra Peak, 1.0km N Irvine lake spillway. 219 Comment
  SD256422  Leptosyne californica Jim Roberts, T. Chester, A. Ballway, N. Accola 2015-3-8 84 San Diego Anza-Borrego Desert State Park; Ranchita area; 2.70 miles SE of junction Wilson Road and S-22; several hundred meters off of Wilson trail in Culp Valley; 1.66 miles N of Grapevine Canyon 1184 Comment
  UCR241909  Lessingia filaginifolia Fred M. Roberts 2012-5-10 7567 Orange Peninsular Ranges; Coastal Foothills, San Joaquin Hills, Buck Gully, south tributary, north slope Pelican Hill, just north of Pelican Hills Drive, 0.7 km north of Pelican Hill summit 154 Comment
  RSA0029939  Lessingia glandulifera var. glandulifera Fred M. Roberts 2012-9-2 7690 San Diego Peninsular Ranges: Valle de San Jose: SR79, 0.3 km N Moretis Jct. (SR76), southeast of Lake Henshaw. San Diego Plant Atlas Grid H18. Comment
  RSA0029941  Lessingia glandulifera var. tomentosa Fred M. Roberts 2012-8-24 7683 San Diego Peninsular Ranges: Valle de San Jose: SR79, mouth of Matagual Valley east of Lake Henshaw about 3.2 km by road north of Moretis Junction (SR76). San Diego Plant Atlas Grid G18. 845 Comment
  UCR246522  Lessingia glandulifera var. tomentosa Fred M. Roberts 2012-8-24 7683 San Diego Peninsular Ranges, VALLE DE SAN JOSE: SR79, mouth of Matagual Valley east of Lake Henshaw about 3.2 km by road north of Moretis Junction (SR76). San Diego Plant Atlas Grid G18. 845 Comment
  RSA747630  Leymus condensatus Fred M. Roberts 2008-5-8 6945 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 65 Comment
  UCSB52930  Leymus triticoides Roberts, Fred 1983-5-19 Orange Laguna Beach; Laguna Canyon along Laguna Canyon Rd., 1.5 km N jct. El Toro and Laguna Canyon Rds.; 4.9km ESE Signal Peak 100 Comment
  UCSB40205  Leymus triticoides Roberts, Fred; Steele, Kelly 1982-5-27 Santa Barbara More Mesa (Central Basin, area 3a). Comment
  SD256224  Ligustrum ovalifolium Jim Roberts 2014-5-31 66 San Diego City of San Diego; Mt. Brundage Park; 125 yards SSW of junction Mt. Culebra Avenue and Mt. Alifan Drive 96 Comment
  UCSB48192  Lilium humboldtii Roberts, Fred 1981-6-26 Orange Santa Ana Mtns 329 Comment
  SD164403  Lilium pardalinum subsp. pardalinum Fred M. Roberts, Michelle Balk 2004-7-1 6070 San Diego Laguna Mountains: Noble Canyon, along Noble Trail east of Pine Creek Road, 1.2km SE Noble Mine, UTM Z11 05 47 960mE, 36 37 084mN. 1285 Comment
  CAS-BOT-BC510685  Lilium parvum D. C. Roberts 1905-8-1 s. n. Tuolumne Unspecified Comment
  UCD116501  Limnanthes douglasii Ed Roberts 1964-3-24 2 Lake on State Highway 29, 5 miles north of Lakeport. 411 Comment
  RSA0013966  Limonium duriusculum Fred M. Roberts 2006-5-26 6338 San Diego Chula Vista: San Diego Bay, west of Interstate 5, Duke Energy site near outflow pipes, south of Telegraph Cyn. Creek, 0.5 km W Bay Blvd. and 1.1 km NW Harboside School. 5 Comment
  SD177557  Limonium duriusculum Fred Roberts 2006-5-26 6338 San Diego Chula Vista: San Diego Bay, W of Interstate 5, Duke Energy site near outflow pipes, south of Telegraph Cyn. Creek, 0.5km W Bay Blvd. and 1.1km NW Harborside School, UTM [NAD83] Z11 04 90 926mE, 36 08 444mN. 4 Comment
  UCR215369  Limonium duriusculum Fred M. Roberts 2006-5-26 6338 San Diego Chula Vista, San Diego Bay, west of I-5, Duke Energy site near outflow pipes, south of Telegraph Canyon Creek, 0.5 km west of Bay Blvd and 1.1 km NW Harborside School 5 Comment
  RSA743510  Limonium perezii Fred M. Roberts 2008-4-9 6861 Orange Dana Point: Dana Point Headlands, CNLM Preserve near Outlook 2, 0.7 km W Marine Institute (Dana Point Harbor). 45 Comment
  UCR188997  Limonium ramosissimum Fred M. Roberts 2007-10-29 6623 Orange South Coast, Niguel Hill, Laguna Niguel. Seaview Park, 1.3 km ENE of Aliso Peak 265 Comment
  RSA542451  Linanthus californicus Fred M. Roberts 1988-4-8 3892 Orange Lomas de Santiago: Loma Ridge, Central Linestone Canyon, 4.1 kilometers NNW Bolero Lookout. 323 Comment
  UCSB47635  Linanthus californicus Roberts, Fred 1980-5-3 Orange Main Divide Truck Trail, on north side of road, 0.3km SE Trabuco Peak, Santa Ana Mtns. 1340 Comment
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Jan 23 2015
  RSA678735  Linanthus dianthiflorus Fred M. Roberts, Carol A. Roberts, Robert Allen 2003-5-11 5860 Orange Dana Point Headlands: hilltop, 0.6km SSW Richard Henry Dana School south of Pacific Coast Highway and north of Scenic Drive. 73 Comment
  RSA773510  Linanthus dianthiflorus Fred M. Roberts 1999-4-26 5198 Orange Lomas de Santiago: Lomas Ridge, tributary to Santiago Canyon Wash on ridge between Limestone Canyon and the wash, 1.4 km SE Silverado School, and 2.7 km N Bolero Lookout. 358 Comment
  SD164432  Linanthus dianthiflorus Fred M. Roberts 2001-4-9 5414 San Diego Jamul Mtns.: SW slopes, NE of Upper Otay Lake, 5.4 km SE summit Mother Miguel Mtn. Otay Lakes North MSCP parcel. Knoll along ridge on gentle SW-facing slope in rocky, open coastal sage scrub and annual grassland 309 Comment
  RSA539354  Linanthus dianthiflorus subsp. dianthiflorus Fred M. Roberts, Karen Kirtland 1989-2-22 4185 Orange San Joaquin Hills: Pelican Hill, 0.5km ESE Summit. 177 Comment
  UCR177690  Linanthus liniflorus Fred M. Roberts, D. E. Bramlet 2003-5-1 5693 Orange Coastal Plains & Basins; South Coastal Plain region, Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.56 km SSW Gato Gate and 0.21 km west of Cristianitos Rd. 96 Comment
  UCR209366  Linanthus parviflorus Fred M. Roberts, Linda Farley 2008-3-28 6833 Orange Santa Ana Mountains, Upper Weir Canyon, Irvine Ranch Conservancy, 3.3 km east-northeast of Robbers Peak on ridge north of canyon 427 Comment
  SEINET14341942  Linanthus pungens J. H. Robertson, Y. Robertson 1979-6-20 s. n. Mono Masonic Hills, 4.5 mi. along Masonic Hills road from Hwy 182, 0.1 mi. SE of red mine dump below road. 2414 Comment
  SEINET14344634  Linanthus pungens J. H. Robertson, Y. Robertson 1979-7-20 s. n. Mono [Sweetwater Mountains] Star City 2591 Comment
  RSA752710  Linaria canadensis Fred M. Roberts 2008-3-19 6787 Orange Dana Point: Dana Point Headlands, CNLM Preserve, 0.8km W Marine Institute, Dana Point Harbor. 60 Comment
  UCR209356  Linaria canadensis var. texana Fred M. Roberts 2008-4-8 6849 Orange Lomas de Santiago, Loma Ridge, Upper Dripping Springs Cnyn, 1.0 km northeast of Bee Peak, Irvine Ranch Conservancy 458 Comment
  RSA594875  Lindernia dubia Fred M. Roberts Jr., Wayne Ferren 1991-12-1 4830 Orange San Josquin Hills: Laguna Canyon, Upper Laguna Lake, 3.5 km N junction El Tprp Rd. , 4.9 km ENE Signal Peak; 113 Comment
  SBBG67525  Linum G. Robertson -Aug-1903 Unknown San Pedro Martir 2286 Comment
  SBBG67526  Linum perenne G. Robertson -Aug-1903 Unknown San Pedro Martir Mtns 2286 Comment
  UCSB38426  Lithophragma cymbalaria Roberts, Dar; Fletcher, Martin 1981-3-23 Santa Barbara 1.25km due north of Field Station, Santa Cruz Island 259 Comment
  RSA719409  Lobularia maritima Fred M. Roberts, Robert L. Allen 2006-10-8 6426 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 0.3km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  RSA731945  Lobularia maritima Fred M. Roberts, Sandy Leatherman 2007-11-27 6690 Orange Yorba Linda: drainage channel on east side of Amberdale Dr. ca. 0.3 km S Fairmont Blvd. 118 Comment
  RSA488121  Lomatium dasycarpum subsp. dasycarpum Fred M. Roberts, K. G. Marsh 1984-2-15 1193 Orange Caspers Regional Park: South rim of Lucas Cyn., 3.6 km NE Visitor Center; 0.7 km WNW Lucas Survey Mark 360 Comment
  RSA542445  Lomatium dasycarpum subsp. dasycarpum Fred M. Roberts 1988-4-10 3913 Orange Lomas De Santiago: Loma Ridge, 1.0 kilometer N Bolero Lookout. 415 Comment
  RSA773521  Lomatium dasycarpum subsp. dasycarpum Fred M. Roberts 1999-5-3 5212 Orange Lomas de Santiago: Loma Ridge, Central Limestone Canyon, west slope, 2.2 km NW Bolero Lookout and 0.8 km NE Bolero Spring. 397 Comment
  UCSB50640  Lomatium lucidum Roberts, Fred 1982-7-7 Orange South Laguna; Niguel Hill, 1.4 km. ESE Aliso Peak; 2.6 km. SSW Niguel Fire Station 207 Comment
  RSA650679  Lomatium mohavense subsp. mohavense Jeni L. Roberts 1991-5-3 16 San Bernardino Within Victorville City Limits. On National Trails Highway, 2.5 miles north of I 15. Comment
  RSA0119677  Lonicera japonica Fred M. Roberts 2015-4-16 7940 Orange Newport Beach: Big Canyon, north side, vicinity of Big Canyon Trail, 0.5 km W Corona Del Mar High School. 2 Comment
  SD245706  Lonicera japonica Jim Roberts 2013-5-20 10 San Diego City of San Diego; Tecolote Canyon Natural Park; 15m north of main trail downhill and west from Mt. Culebra Avenue entrance, in drainage channel near grove 89 Comment
  UCSB47997  Lonicera subspicata var. denudata Roberts, Jr., Fred 1980-7-7 Orange Santa Ana Mtns.; San Juan Canyon, Hwy. 74, 2.4 km. ENE San Juan Guard Station; 0.3 km. W bench mark 1100 345 Comment
  UCSB52454  Lonicera subspicata var. denudata Roberts, Fred; Allen, R. 1982-7-4 Orange Chino Hills; Carbon Canyon, Carbon Canyon Rd., 0.3 km. by road SW county line; 2.5 km. NW Gilman Peak 260 Comment
  IRVC28130  Lotus hamatus Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5765 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  RSA542544  Lotus hamatus Fred M. Roberts 1988-4-10 3914 Orange Lomas De Santiago: Loma Ridge, 1.0 kilometer N Bolero Lookout. 415 Comment
  RSA681023  Lotus hamatus Fred M. Roberts, David E. Bramlet 2003-3-13 5582 Orange Donna O'Neill Land Conservancy: Ridge west of Christianitos Canyon, 1.6 km NW Sycamore Gate. 207 Comment
  RSA599587  Lotus heermannii Fred M. Roberts, Trish Smith, Greg Nichols 1995-4-27 4935 Orange Irvine: San Joaquin Hills, Moro Canyon, Upper West Fork, c.a. 1.8 km SE Signal peak. 274 Comment
  RSA786123  Lotus micranthus Fred M. Roberts 1984-3-22 s.n. Santa Barbara Santa Cruz Island. Upper Cuesta Valdez area, 2.6km WNW Diablo Peak. 0.5km NNE Bench Mark 1697. 400 Comment
  UCR241906  Lotus scoparius subsp. scoparius Fred M. Roberts 2012-4-24 7525 Orange Peninsular Ranges; Coastal Foothills, San Joaquin Hills, Buck Gully, tributary canyon below San Joaquin Hills Road and 2.0 km W Signal Peak 167 Comment
  IRVC28474  Lotus scoparius var. scoparius Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5810 San Diego Otay Mtn; head of cyn 2 miles NW of Otay Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 470 Comment
  RSA0013908  Lotus scoparius var. scoparius Fred M. Roberts 2012-4-24 7525 Orange San Joaquin Hills: Buck Gully, tributary canyon below San Joaquin Hills Road and 2.0 km W Signal Peak 167 Comment
  RSA737533  Lotus scoparius var. scoparius Fred M. Roberts 2008-3-12 6729 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, c.a. 0.8 km W Marine Institute (Dana Point Harbor). 50 Comment
  UCR128866  Lotus scoparius var. scoparius Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5810 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 470 Comment
  IRVC28129  Lotus strigosus Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5766 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  UCR128391  Lotus strigosus Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5766 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 427 Comment
  IRVC22013  Lotus strigosus var. strigosus Fred M. Roberts, Gordon Marsh 1985-3-12 1507 Orange mesa west of Ave. Pico and north of El Camino Real, 3.2km SSE Coyote Bluff; 0.6km E Bench Mark 16 (sect. 32), San Clemente 37 Comment
  IRVC24533  Lotus strigosus var. strigosus Fred M. Roberts, Gordon Marsh 1986-2-28 2636 Orange Mission Viejo: N of Oso Parkway; 4.2km NNE Saddleback Community College. Southern Coastal 200 Comment
  RSA542579  Lotus strigosus var. strigosus Fred M. Roberts 1988-3-15 3847 Orange Rancho Mission Viejo: Verdugo Canyon, 2.6 km ENE Point Rancho Survey Mark 149 Comment
  UCR203986  Lotus strigosus var. strigosus Fred M. Roberts 2008-3-12 6727 Orange South Coast, Dana Point Headlands Center for Natural Lands Mgmt. Preserve, west side, c. 0.8 km west of Marine Institute, Dana Point Harbor 50 Comment
  RSA688873  Lotus unifoliolatus Fred M. Roberts 2003-5-1 5666 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.49km S Gato Gate and just west of Cristianitos Rd. (San Clemente) 84 Comment
  RSA717042  Ludwigia peploides Fred M. Roberts, Chris M. Barnhill 2005-9-27 6285 Orange San Juan Capistrano: San Juan Creek wash, east of La Novia Road bridge, 1.4km E Mission San Juan Capistrano. 27 Comment
  UCR189545  Ludwigia peploides subsp. peploides Fred M. Roberts, S. Leatherman 2007-9-19 6582 Riverside Santa Ana Canyon, Santa Ana River, across from Green River Golf Course, 0.15 km W of Green River Road bridge 128 Comment
  UCD106012  Lupinus albifrons var. abramsii Warren Roberts 1967-3-28 s.n. Monterey end of El Caminito, Carmel Valley: originally from Bixby Cr. Comment
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Jun 10 2020
  SEINET5333867  Lupinus andersonii J. Robertson, Y. Robertson 1979-7-20 s.n. Mono Sweetwater Mts., Star City. 2591 Comment
  SEINET5327932  Lupinus argenteus var. heteranthus J. Robertson, Y. Robertson 1979-6-20 s.n. Mono Toiyabe NF, 2.9 mi from boundary. 4.5 mi along Masonic Hills from HW 182; 1/20 mi. SE of red mine dump below road 2414 Comment
  SD187938  Lupinus bicolor Laurie Roberts, Lane McClelland 2006-5-2 6 San Diego Descanso. Just N of I-8, ca. 1 1/3 mi E of its intersection with SR-79. 1098 Comment
  RSA542580  Lupinus bicolor subsp. microphyllus Fred M. Roberts 1988-3-15 3849 Orange Rancho Mission Viejo: Verdugo Canyon, 2.6 km ENE Point Rancho Survey Mark 149 Comment
  IRVC22067  Lupinus bicolor subsp. microphyllus Fred M. Roberts 1983-3-16 917 Orange Laguna Beach: Sycamore Hills, central ridge, 1.1km NNE jct. El Toro and Laguna Canyon Rds.; 5.4km [ESE] Signal Peak. Southern Coastal 156 Comment
  IRVC22219  Lupinus bicolor subsp. umbellatus Fred M. Roberts, Gordon Marsh 1985-4-3 1611 Orange Irvine: Irvine Ranch, 1.2km W UCI campus center, Southern Coastal 24 Comment
  IRVC21215  Lupinus bicolor subsp. umbellatus Fred M. Roberts 1984-3-9 1241 Orange Wagon Wheel Regional Park: 2.6km NE Median Rancho Survey Mark, Santa Ana Mountains 210 Comment
  IRVC24765  Lupinus bicolor subsp. umbellatus Fred M. Roberts 1986-4-24 2790 Orange Rancho Mission Viejo: Canyon east of Trampas Canyon, S of Hwy 74, 2.5km E Viejo Survey Mark. Santa Ana Mountains 113 Comment
  IRVC28144  Lupinus concinnus Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5777 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  UCSB47613  Lupinus hirsutissimus Roberts, Fred 1980-5-3 Orange Main Divide Truck Trail, 0.4 km. NNE Falcon Group Camp (near Blue Jay CG); Santa Ana Mountains 1067 Comment
  IRVC22852  Lupinus latifolius var. parishii Fred M. Roberts 1985-6-7 1884 Orange Viejo Canyon, 0.5km N Hwy. 74, 2.5km W Lower San Juan Picnic Ground. santa Ana Mountains 327 Comment
  IRVC20486  Lupinus longifolius Fred M. Roberts, Karlin G. Marsh 1983-5-13 1046 Orange San Joaquin Hills: Laguna Canyon, Laguna Canyon Rd., 1.7km N Thurston Sch.; 6.4km SER Signal Peak. Southern Coastal 50 Comment
  RSA542381  Lupinus longifolius Fred M. Roberts, T. Sholars, B. Stechmeyer 1988-3-29 3889 Orange Lomas De Santiago: Lomas Ridge, Santiago Canyon Road, 5.5km NW Silverado Canyon Road Jct. 256 Comment
  RSA542383  Lupinus longifolius Fred M. Roberts, T. Sholars, B. Stechmeyer 1988-3-29 3888 Orange Lomas De Santiago: Lomas Ridge, Santiago Canyon Road, 5.5km NW Silverado Canyon Road Jct. 256 Comment
  RSA588787  Lupinus longifolius Fred M. Roberts, D. Bontrager 1990-4-18 4575 Orange Rancho Mission Viejo: Chiquita Ridge, just west of Canada Chiquita, 2.9 km N Median Rancho Survey Marker 183 Comment
  RSA749358  Lupinus microcarpus var. microcarpus Fred M. Roberts 2008-4-15 6897 Orange Lomas de Santiago: Loma Ridge, Lower Hicks Cyn., east ridge, 1.7 km E Rattlesnake Reservoir dam and 2.2 km W Bee Peak, Irvine Ranch Conservancy. 179 Comment
  UC1595603  Lupinus microcarpus var. microcarpus Fred M. Roberts Jr. and Carol A. Roberts 1989-4-7 4262 Orange 0.6 km nw Moulton Peak; Aliso-Wood Canyon Regional Park, Upper Wood Canyon 131 Comment
  IRVC21274  Lupinus sparsiflorus subsp. sparsiflorus Fred M. Roberts, Karlin G. Marsh 1984-2-15 1204 Orange Casper's Regional Park: Rancho: Rancho Carrillo Rd., 1.0km NE Visitor Center; 3.0km SW Lucas Survey Mark, Santa Ana Mountains 150 Comment
  IRVC20366  Lupinus sparsiflorus subsp. sparsiflorus Fred M. Roberts 1983-3-16 932 Orange Laguna Beach: Sycamore Hills, central ridge, 1.1km NNE jct. El Toro and Laguna Canyon Rds.; 5.4km [ESE] Signal Peak. Southern Coastal 156 Comment
  IRVC22003  Lupinus succulentus Fred M. Roberts, Gordon Marsh 1985-3-12 1525 Orange mesa west of Ave. Pico and north of El Camino Real, 3.2km SSE Coyote Bluff; 0.6km E Bench Mark 16 (sect. 32), San Clemente 37 Comment
  IRVC24509  Lupinus truncatus Fred M. Roberts, Gordon Marsh 1986-2-28 2613 Orange Lateral to English Canyon along Vista Del Lago; 3.4km ENE El Toro Fire Station, in ravine at base of north-facing slope. Mission Viejo 236 Comment
  RSA678723  Lupinus truncatus Fred M. Roberts, Robert L. Allen, Carol Roberts 2003-5-11 5852 Orange Dana Point Headlands: 0.8km SSW Richard Henry Dana School north of Marguerita Drive 76 Comment
  UCR203985  Lupinus truncatus Fred M. Roberts 2008-3-12 6726 Orange South Coast, Dana Point Headlands Center for Natural Lands Mgmt. Preserve, west side, c. 0.8 km west of Marine Institute, Dana Point Harbor 50 Comment
  IRVC21480  Luzula subsessilis Fred M. Roberts, Wayne R. Ferren 1984-3-20 1280 Santa Barbara Sata Cruz Island; Centinella; W Pine Forest; 6.8km WNW Research Station; 2km SSW Devil's Peak Channel Islands 370 Comment
  UCSB34446  Luzula subsessilis Roberts, Fred 1980-4-25 San Luis Obispo At the end of Bridge street; north of Cambria in Cambria Pine Forest 152 Comment
  RSA743464  Lycium californicum Fred M. Roberts 2008-5-27 7010 Orange Dana Point: Dana Point Headlands, CNLM Preserve near Outlook 2, 0.7 km W Marine Institute (Dana Point Harbor). 45 Comment
  RSA700255  Lycopersicon esculentum Fred M. Roberts 2003-7-8 5959 Orange Coastal Plains and Basins; Los Angeles Basin region; Orange Park Acres, along Santiago Creek, 0.5 km E Cannon Road and 0.3 km n Santiago Canyon Road. 117 Comment
  UCSB47995  Lythrum californicum Roberts, Fred 1980-7-7 Orange Santa Ana Mtns; San Juan Canyon, Hwy 74, 2.4km ENE San Juan Guard Station; 0.3km W Bench Mark 1100 315 Comment
  RSA679219  Madia gracilis Fred M. Roberts 2003-6-17 5913 Orange Just NE of Falcon roup Camp, 2.1km ESWE Los Pinos Peak just west of main road. 1009 Comment
  RSA362292  Madia gracilis Fred M. Roberts 1985-6-7 1846 Orange Santa Ana Mountains: Main Divide Truck trail, 2.2km ESE Los Pinos Peak. 1005 Comment
  UCR189547  Maianthemum racemosum subsp. amplexicaule Fred M. Roberts 2005-7-7 6255 San Bernardino San Bernardino Mountains, Lake Arrowhead, along Orchard Creek on Potomac Rd., 0.2 km SE Shannandoah Rd., about 2.1 km NW Mount Soranson on south side of Lake 1607 Comment
  RSA553110  Malacothamnus fasciculatus var. laxiflorus Fred M. Roberts 1989-5-9 4342 -A Orange Gypsum Canyon, west for,, 5.6 km WNW Sierra Peak, 1km S Hwy 91. 146 Comment
  UCR209661  Malacothrix saxatilis var. saxatilis Fred M. Roberts 2008-5-16 6978 Orange South Coast, Dana Point Headlands, Center for Natural Lands Mgmt. Preserve, along north slopes above Dana Strand Beach, 0.8 km west-northwest of the Marine Institute, Dana Point Harbor 45 Comment
  IRVC21322  Malacothrix saxatilis var. tenuifolia Fred M. Roberts 1982-7-30 786 Orange Niguel Hill, 0.9km ENE Aliso Peak, Laguna Niguel 260 Comment
  IRVC22734  Malacothrix saxatilis var. tenuifolia Fred M. Roberts 1985-5-13 1787 Orange South Laguna; Mouth of Aliso Canyon, 0.6km NW Aliso Peak, 6 Comment
  RSA773520  Malacothrix saxatilis var. tenuifolia Fred M. Roberts 1999-5-3 5211 Orange Lomas de Santiago: Loma Ridge, Central Limestone Canyon, west slope, 2.3 km NW Bolero Lookout and 0.5 km NE Bolero Spring 446 Comment
  UCR247892  Malacothrix saxatilis var. tenuifolia Fred M. Roberts 2012-7-18 7661 Orange SAN JOAQUIN HILLS: Newport Beach, Buck Gully, along Buck Gully Trail, about 0.7 km from the north terminus of Poppy Street and 1.8 km WNW summit of Pelican Hill 52 Comment
  IRVC25416  Malephora crocea Fred M. Roberts, Wayne Ferren 1987-4-8 3355 Orange Upper Newport Back Bay, west side, North Star Beach, 0.8km N Coney Island, Newport Beach 0 Comment
  RSA743469  Malephora crocea Fred M. Roberts, Lee Ann Carranza, Jeff Roseler 2008-10-9 7126 Orange Dana Point: Dana Point Headlands, CNLM Preserve, at base of cliff along south edge, 0.7 km W Marine Institute (Dana Point Harbor). 3 Comment
  UCR236677  Malephora crocea Fred M. Roberts, Lee Ann Carranza, Jeff Roseler 2008-10-9 7126 Orange South Coast, Dana Point, Dana Point Headlands, CNLM Preserve, at base of cliff along south edge, 0.7 km west of Marine Institute, Dana Point Harbor 3 Comment
  IRVC3285  Malosma laurina Fred M. Roberts, K. G. Marsh 1985-7-18 2057 Orange Temple Hill, Goff Ridge, 0.9km NE Goff Island off Nye Place Laguna Beach 168 Comment
  UCSB48029  Malosma laurina Roberts, Fred 1980-7-7 Orange Santa Ana Mtns.; San Juan Canyon, Calif. Rte. 74; 2.2 km. ENE San Juan Guard Station; 0.6 km W Bench Mark 1100 305 Comment
  UCSB48098  Malva parviflora Roberts, Fred 1981-4-11 Orange Ortega Hwy: Hwy 74 5.2km E San Juan Capistrano near San Juan Creek crossing 52 Comment
  UCSB52905  Malva pseudolavatera Roberts, Fred 1985-4-24 Orange San Joaquin Hills: Laguna Canyon along Laguna Canyon Rd., 0.6km N jct, El Toro Rd,; UTM 3716450mN, 429300mE 22 Comment
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Feb 22 2019
  RSA716091  Malvaviscus arboreus Fred M. Roberts 2006-7-27 6394 Orange San Joaquin Hills: Laguna Beach, Temple Hill, 731 Nyes Place, 1.0km NNE Golf Island. 174 Comment
  RSA0093741  Malvella leprosa Fred M. Roberts 2014-4-21 7849 Orange South Coast. SAN JOAQUIN HILLS: Laguna Lake 1 (Upper Laguna Lake), south basin. 113 Comment
  UCR203984  Marah macrocarpa Fred M. Roberts 2008-3-12 6723 Orange South Coast, Dana Point Headlands Center for Natural Lands Mgmt. Preserve, west side, c. 0.8 km west of Marine Institute, Dana Point Harbor 50 Comment
  UCSB47970  Marah macrocarpa Roberts, Jr., Fred 1980-2-17 Orange Dana bluffs along Scenic Drive Road, northwest of and above Dana Point Harbor, Dana Point 58 Comment
  UCR267206  Marina parryi Fred M. Roberts, Carol A. Roberts 2014-11-11 7916 San Bernardino Sonoran Desert, Chemehuevi Valley: tributary to Gary Wash at west base of hill with VABM Huevis, 0.2 km E SR 95 and 4.5 km NW Pyramid Butte 387 Comment
  RSA701971  Marrubium vulgare Fred M. Roberts, David E. Bramlet 2003-6-20 5927 Orange Rancho Mission Viejo: Donna O Neill Land Conservancy, tributary to Christianitos Cyn, along Back Road, 1.48 km WNW Sycamore Gate. 189 Comment
  RSA552932  Marrubium vulgare Fred M. Roberts, R. E. Riefner 1989-5-2 4333 Orange Aliso-Wood Canyons Regional Park: Lower Woods Canyon, 3.3 km S Multon Peak. 40 Comment
  UCSB48088  Marrubium vulgare Roberts, Fred 1981-5-2 Orange Camino Capistrano, 1.7km N Crown Valley Parkway 49 Comment
  RSA665952  Marsilea vestita Fred M. Roberts, Michelle Lee, Kristen Szabo 2001-4-13 5423 Orange Rancho Mission Viejo: South of San Juan Creek, 0.4km ESE Median Rancho Survey Marker., PCR Vernal Pool 7. 238 Comment
  RSA665955  Marsilea vestita Fred M. Roberts, Michelle Lee, Kristen Szabo 2001-4-13 5426 Orange Rancho Mission Viejo: South of San Juan Creek, 0.6km WNW Median Rancho Survey Marker., PCR Vernal Pool 2. 183 Comment
  RSA666090  Marsilea vestita Fred M. Roberts, Michelle Lee, Kristen Szabo 2001-4-13 5429 Orange Rancho Mission Viejo: Chiquita Ridge, 0.3km WNW Median Rancho Survey Marker., PCR Vernal Pool 4. 226 Comment
  RSA594805  Marsilea vestita Fred M. Roberts, Doreen Stadlander, Ray Vizgirdas 1992-4-24 4838 Orange El Toro Marine Base: just west of Borrego Wash, 2.7 km SE Lambert Reservoir dam 166 Comment
  CAS-BOT-BC348147  Matricaria discoidea Robert Robertson 1954-5-8 149 Monterey Near sea E. of Carmel Cove, Point Lobos 9 Comment
  UCR211712  Matricaria occidentalis Fred M. Roberts, D. E. Bramlet, Kerry Byrne 2006-4-20 6322 Riverside Perris Basin, Upper Salt Creek watershed, southwest of Hemet, 2 km southeast of Winchester, south of Domenigoni Parkway 453 Comment
  IRVC21997  Medicago polymorpha Fred M. Roberts, G. A. Marsh 1985-3-12 1520 Orange San Clemente; bluffs above El Camino Real, c.a. 1.1km NW Ave. Pico by road; 0.2km E Bench Mark 16 (sect. 32). Southern Coastal 31 Comment
  RSA737483  Medicago polymorpha Fred M. Roberts 2008-3-12 6733 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, c.a. 0.8 km W Marine Institute (Dana Point Harbor). 50 Comment
  RSA725517  Melia azedarach Fred M. Roberts, Robert L. Allen 2007-9-28 6613 Orange Lomas de Santiago: above lower Santiago Cyn. wash along Santiago Cyn. Rd. just south of Irvine Mesa, 3.3 km N Bolero Lookout. 332 Comment
  IRVC28331  Melica frutescens Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5704 San Diego Otay Mountain, south side near crest of ridge east of lower "Butteweg Canyon" along the border trail, Tijuana River watershed Peninsular Range, San Ysidro Mountains 305 Comment
  RSA680930  Melica frutescens Fred M. Roberts, Andy Pinolo, Kam Muri 2003-5-3 5704 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed., (32 deg 33'46N, 116 deg 47' 59W). 305 Comment
  SD233697  Melica frutescens Fred M. Roberts, Andy Pinolo, Kam Muri 2003-5-3 5704 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of lower Butteweg Canyon along the border trail, Tijuana River watershed. 305 Comment
  UCR128522  Melica frutescens Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5704 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed 305 Comment
  IRVC28450  Melica imperfecta Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5723 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  RSA747626  Melica imperfecta Fred M. Roberts 2008-4-16 6906 Orange Dana Point: Dana Point Headlands, CNLM Preserve, 0.8km W Marine Institute, Dana Point Harbor. 45 Comment
  RSA773501  Melica imperfecta Fred M. Roberts 1999-5-14 5221 Orange Lomas de Santiago: Loma Ridge, Upper Limestone Canyon, 0.7 km NW Bolero Spring and 2.6 km SW Silverado School 502 Comment
  SD164573  Melica imperfecta Fred M. Roberts 2001-4-9 5409 San Diego Jamul Mtns; SW slopes, NE of Upper Otay Lake, 5.4 km SE summit Mother Miguel Mtn. Otay Lakes North MCSP parcel 309 Comment
  UCR128405  Melica imperfecta Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5723 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  UCR209370  Melica imperfecta Fred M. Roberts, Linda Farley 2008-3-28 6821 Orange Santa Ana Mountains, Upper Weir Canyon, Irvine Ranch Conservancy, east fork along ridge just west of SR 241, 3.4 km east of Robber's Peak 437 Comment
  UCSB40767  Melica imperfecta Roberts, Dar 1981-3-25 Santa Barbara Los Pinos del Sur, Santa Cruz Island 274 Comment
  UCSB47583  Melica imperfecta Roberts, Fred 1980-4-3 Orange Highway 74; 0.2 km. SW of Orange-Riverside Co. line; 0.4 km. NNE Lower San Juan Picnic Ground, San Juan Cyn., Santa Ana Mountains 420 Comment
  UCSB36155  Melica imperfecta Roberts, D. 1980-4-12 Santa Barbara De la Guerra Springs; .7 miles from main rd 760 Comment
  IRVC23313  Melilotus albus Fred M. Roberts 1985-7-23 2065 Orange Irvine; San Diego Creek between E Yale Loop and Jeffrey Rd. Southern Coastal 35 Comment
  IRVC25059  Melilotus albus Fred M. Roberts 1986-8-21 3053 Orange English Canyon along English Creek just below Trabuco Rd. crossing, c.a. 2.4km E El Toro Fire Station, Mission Viejo 166 Comment
  RSA730996  Melilotus albus Fred M. Roberts 2006-11-15 6470 Orange Santa Ana Cyn., Santa Ana River, north bank, 1.1 km ENE Imperial Hwy crossing. 85 Comment
  IRVC20467  Melilotus indicus Fred M. Roberts 1983-5-13 1059 Orange Dana Point Headlands; N of Scenic Dr., 0.5km W Dana Point Harbor; 0.7km SSW Richard Henry Dana School. Southern Coastal 79 Comment
  IRVC20806  Melilotus indicus Fred M. Roberts 1982-5-22 644 Orange Dana Point; Junction of Selva and Stone Hill drives, 1.0km ESE Dana Hills High School; 1.7km SW Marco Forster Junior High School. Southern Coastal 40 Comment
  UCR241902  Melilotus indicus Fred M. Roberts 2012-4-24 7520 Orange Peninsular Ranges; Coastal Foothills, San Joaquin Hills, Buck Gully, tributary canyon below San Joaquin Hills Road and 2.0 km W Signal Peak 167 Comment
  RSA688867  Melilotus indicus Fred M. Roberts 2003-5-1 5668 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.49km S Gato Gate and just west of Cristianitos Rd. (San Clemente) 84 Comment
  RSA594802  Melinis repens Fred M. Roberts, Terasa Bruckenstien 1992-3-19 4837 Orange Rancho Mission Viejo, San Juan Creek east of San Juan Capistrano and just north of Ortega Highway bridge, 3.6 km. SSW Median Rancho Survey Mark., UTM Z11 37 08 900m N, 4 42 100m E 49 Comment
  SD233700  Melinis repens subsp. repens Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5809 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi WSW of peak 2242. 470 Comment
  RSA708735  Mentha aquatica Fred M. Roberts, Robert L. Allen, Chris Barnhill 2004-8-21 6120 Orange Caspers Wilderness Park, Hot Springs Creek in San Juan Cyn., c.a. 0.36km SSW San Juan Ranger Station, at SR 74 crossing. 197 Comment
  UCR267204  Mentzelia adhaerens Fred M. Roberts, Carol A. Roberts 2014-11-11 7913 San Bernardino Sonoran Desert, Chemehuevi Valley: tributary to Gary Wash at west base of hill with VABM Huevis, 0.2 km E SR 95 and 4.5 km NW Pyramid Butte 387 Comment
  RSA539392  Mentzelia dispersa Fred M. Roberts, Carol A. Roberts 1988-6-9 4071 Orange Santa Ana Mountains: Main Divide Truck Trail, Modjeska Peak, west slope, 0.5 km NNW summit. 1417 Comment
  RSA0014074  Mentzelia micrantha Fred M. Roberts 2008-5-28 7011 Orange Lomas de Santiago: Loma Ridge, south fork Rattlesnake Cyn., 2.0km above Rattlesnake Reservoir dam and 2.2km WNW Bee Peak. 230 Comment
  HSC79303  Mentzelia nitens Roberta G. Robertson 1974-3-29 176 San Bernardino 19.2 mi. S of Jct. Hwy. 66 and Sunflower Springs Rd. 2.7 mi. W on unnamed dirt road, Old Woman Mtns., 111.5 air mi. ESE of Barstow. 1067 Comment
  RSA752848  Mesembryanthemum nodiflorum Fred M. Roberts 2009-4-21 7156 Orange Dana Point Headlands: southern cliffs, 0.7 km W Marine Institute at Dana Point Harbor. CNLM Dana Point Preserve. 3 Comment
  RSA588800  Micropus californicus Fred M. Roberts 1990-5-7 4600 Orange Rancho Mission Viejo: Ridge S of Blind Canyon and E of Christianitos Canyon, TRW Lease Holding, 5.0 km NE Clemente Survey Marker 152 Comment
  RSA773500  Micropus californicus var. californicus Fred M. Roberts 1999-5-14 5220 Orange Lomas de Santiago: Loma Ridge, Upper Limestone Canyon, 0.7 km NW Bolero Spring and 2.6 km SW Silverado School 502 Comment
  RSA685937  Microseris douglasii subsp. platycarpha Fred M. Roberts, David E. Bramlet 2003-3-27 5621 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Chistianitos Cyn., 0.79km N Sycamore Gate, 0.23km W Chistianitos Rd. 122 Comment
  SD148668  Microseris douglasii subsp. platycarpha Fred M. Roberts 2001-4-6 5395 San Diego La Zanja Canyon, 1.2 km southwest Doug Survey Marker north of Carmel Valley Road. 121 Comment
  SD220226  Microseris douglasii subsp. platycarpha Fred Roberts 2000-5-10 5323 San Diego Otay Lakes: Resort site, SW foothills Jamul Mtns., along Otay Lakes Rd. (east side), 1.0 km SE Upper Otay Lakes dam [Jamul Mtns. Quad: UTM Z11 05 07 042mE, 36 11 717mN]. 155 Comment
  UCR208155  Microseris douglasii subsp. platycarpha Fred M. Roberts, D. E. Bramlet 2003-3-27 5621 Orange Coastal Plains & Basins; South Coastal Plain region, Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.79km N Sycamore Gate, 0.23km W Cristianitos Rd. 126 Comment
  RSA599649  Microseris douglasii subsp. platycarpha Fred M. Roberts 1995-4-21 4930 Orange Irvine: San Joaquin Hills, Quail Hill area near end of San Canyon Road, 2.5 km ENE French Hill. 52 Comment
  RSA599650  Microseris douglasii subsp. platycarpha Fred M. Roberts 1995-4-21 4931 Orange Irvine: San Joaquin Hills, Quail Hill area near end of San Canyon Road, 2.5 km ENE French Hill. 52 Comment
  IRVC28491  Microseris heterocarpa Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5790 San Diego Otay Mtn; head of cyn 2 miles NW of Otay Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 470 Comment
  UCR209371  Microseris heterocarpa Fred M. Roberts, Linda Farley 2008-3-28 6817 Orange Santa Ana Mountains, Upper Weir Canyon, Irvine Ranch Conservancy, east fork along ridge just west of SR 241, 3.4 km east of Robber's Peak 437 Comment
  RSA749306  Microseris lindleyi Fred M. Roberts 1999-4-21 5179 Orange Lomas de Santiago: Loma Ridge, ridges north of Dripping Springs Cyn., 1.5 km W Silverado Sch. and 4.8 km NNW Bolero Lookout. 365 Comment
  RSA751989  Microseris lindleyi Fred M. Roberts, Eliza Maher 2008-3-26 6796 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 65 Comment
  RSA599647  Microseris lindleyi Fred M. Roberts 1995-4-21 4928 Orange Irvine: San Joaquin Hills, Quail Hill area near end of San Canyon Road, 2.9 km ENE French Hill. 49 Comment
  RSA0013911  Mimulus aurantiacus var. pubescens Fred M. Roberts 2012-4-24 803784 Orange San Joaquin Hills: Buck Gully, tributary canyon below San Joaquin Hills Road and 2.0 km W Signal Peak 167 Comment
  UCR209340  Mimulus aurantiacus var. pubescens Fred M. Roberts 2008-4-22 6920 Orange Lomas de Santiago, Loma Ridge, Lower Hicks Canyon, along Haul Road near asphalt plant, 2.2 km east-northeast of Rattlesnake Reservoir Dam and 2.2 km west-northwest of Bee Peak, Irvine Ranch Conservancy 188 Comment
  UCSB47965  Mimulus aurantiacus var. pubescens Roberts, Fred 1980-4-3 Orange San Juan Canyon; HWY 74; 0.4km NNE Lower San Juan Picnic Ground; Santa Ana Mountains 420 Comment
  UCSB48103  Mimulus aurantiacus var. pubescens Roberts, Fred; Fritzke, Sue 1982-4-3 Orange Santa Ana Mnts; Lower Hot Springs Canyon; Lazy W Road; 2.4km N by road of San Juan Guard Station; 1.4km NNW Juan Rancho Survey Mark 240 Comment
  UCSB52448  Mimulus aurantiacus var. pubescens Roberts, Fred; Allen, R. 1982-7-4 Orange Chino Hills; Carbon Canyon; Carbon Canyon Rd; 0.3km by road SW county line; 2.5km NNW Gilman Peak 260 Comment
  IRVC27991  Mimulus aurantiacus var. puniceus Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5716 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  RSA550597  Mimulus aurantiacus var. puniceus Fred M. Roberts 1989-4-26 4317 Orange Costa Mesa; Fairview Park, Just west of end of Canyon Drive, 0.1 km W Canyon School. 24 Comment
  UCR128376  Mimulus aurantiacus var. puniceus Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5716 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  IRVC28106  Mimulus brevipes Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5771 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  UCR128862  Mimulus brevipes Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5771 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 427 Comment
  RSA712936  Mimulus cardinalis Fred M. Roberts 2005-10-3 6291 Orange San Juan Capistrano: San Juan Creek wash, La Novia Road Bridge to 100m E of bridge, 1.4km E Mission San Juan Capistrano, 27 Comment
  UCSB48200  Mimulus cardinalis Roberts, Fred 1981-6-26 Orange Sant Ana Mts; Viejo Canyon; 0.1km N Calif. Rte. 74; 2.7km E San Juan Gurad Station 291 Comment
  IRVC28064  Mimulus clevelandii Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5820 San Diego Otay Mtn; head fo canyon ca. 2 milesNW of Otay Mtn Peak, ca. 0.5 mile WSW of peak 2242, S of peak 1517. Peninsular Ranges, San Ysidro Mountains 396 Comment
  UCSB50634  Mimulus clevelandii Roberts, Fred 1982-7-9 Orange Santa Ana Mts; Upper Hot Springs Canyon; 0.1km SW Falcon Group Camp; 2.0km SE Los Pinos Peak 1075 Comment
  RSA588708  Mimulus clevelandii Fred M. Roberts 1990-5-22 4642 Orange Santa Ana Mts. East Fork Upper Long Canyon, along Maine Divide Truck Trail Extension, 4.1km E Los Pinos Peak 954 Comment
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Dec 5 2011
  JROH4084  Mimulus guttatus Robert Robertson 1954-4-23 99 San Mateo Jasper Ridge Biological Preserve, Stanford University 170 Comment
  RSA701948  Mimulus guttatus Fred M. Roberts, David Bramlet 2003-6-6 5901 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, west slopes of Cristianitos Canyon, 0.86 km SSW Gato Gate and 0.39 km W of Cristianitos Road. Comment
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Nov 7 2014
  UCSB47989  Mimulus guttatus Roberts, Fred 1980-7-7 Orange Santa Ana Mtns; San Juan Cyn; Hwy 74; 2.3km ENE San Juan Guard Station; 0.4km W Bench Mark 1100 315 Comment
  RSA715695  Mimulus pilosus Fred M. Roberts, Chris M. Barnhill 2005-9-27 6277 Orange San Juan Capistrano: San Juan Creek wash, east of La Novia Road bridge, 1.4km E Mission San Juan Capistrano, 27 Comment
  IRVC25444  Minuartia douglasii var. douglasii Fred M. Roberts 1987-5-9 3432 Orange San Juan Trail above Chiquito Basin, 2.3km SSE Los Pinos Peak, Santa Ana Mountains 952 Comment
  CAS-BOT-BC174764  Minuartia nuttallii var. gracilis George Robertson 21 Riverside Near Summit of Grayback near Redlands Comment
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Sep 3 2017
  RSA737549  Mirabilis laevis var. crassifolia Fred M. Roberts 2008-3-12 6712 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, c.a. 0.8 km W Marine Institute (Dana Point Harbor). 50 Comment
  UCR203978  Mirabilis laevis var. crassifolia Fred M. Roberts 2008-3-12 6712 Orange South Coast, Dana Point Headlands Center for Natural Lands Mgmt. Preserve, west side, c. 0.8 km west of Marine Institute, Dana Point Harbor 50 Comment
  UCR267183  Mirabilis laevis var. crassifolia Fred M. Roberts 2010-3-12 7178 Orange Southeast Coast, DANA POINT HEADLANDS: Harbor Point Park, South of Green Lantern and west of Dana Point Harbor, c. 150 meters SE Interpretive Center 50 Comment
  UC61523  Monardella Geo. Robertson 107 San Bernardino Mill Creek Divide San Bernardino Mt. 2438 Comment
  IRVC22034  Monardella hypoleuca subsp. hypoleuca Fred M. Roberts 1983-9-26 1128 Orange Lion Canyon, Chiquito Basin Trail, 3.5km NNE Lower San Juan Picnic Ground; 4.2km SSE Los Pinos Peak, Santa Ana Mountains 815 Comment
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Sep 18 2012
  UCR215371  Monardella hypoleuca subsp. hypoleuca Fred M. Roberts 2006-7-17 6384 Santa Barbara Transverse Range; Santa Ynez Mountains, Refugia Road, c. 4.3 km south by road refugio Pass (jct. West Camino Cielo Rd.) and c. 2.6 km SE Bald Peak 370 Comment
  RSA539413  Monardella lanceolata var. lanceolata Fred M. Roberts 1988-6-10 4102 Orange Santa Ana Mountains: Modjeska Peak, 0.4 km WSW summit. 1621 Comment
  UCR215364  Monardella nana subsp. tenuiflora Fred M. Roberts 2006-6-21 6341 Riverside Peninsular Range; San Jacinto Mountains, Little Thomas Mountain; Thomas Mountain Road, 0.5 km west summit of peak 1866 Comment
  IRVC28245  Monardella stoneana Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5819 San Diego Otay Mtn; head fo canyon ca. 2 milesNW of Otay Mtn Peak, ca. 0.5 mile WSW of peak 2242, S of peak 1517. Peninsular Ranges, San Ysidro Mountains 396 Comment
  UCR128549  Monardella stoneana Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5819 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.5 mi. WSW of peak 2242, south of peak 1517 396 Comment
  RSA542545  Muhlenbergia microsperma Fred M. Roberts 1988-2-18 3802 Orange Lomas de Santiago: Ridge west of Irvine Lake, 1.0 km NW Santiago Dam spillway 244 Comment
  SD233702  Muhlenbergia microsperma Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5762 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi WSW of peak 2242. 127 Comment
  SD234765  Muhlenbergia microsperma Fred M. Roberts, A. Pinolo, K. Muri 2003-5-3 5705 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of ridge east of lower Butteweg Canyon along the border trail, Tijuana River watershed 305 Comment
  UCR128524  Muhlenbergia microsperma Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5705 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed 305 Comment
  UCR267207  Muhlenbergia microsperma Fred M. Roberts, Carol A. Roberts 2014-11-11 7917 San Bernardino Sonoran Desert, Chemehuevi Valley: tributary to Gary Wash at west base of hill with VABM Huevis, 0.2 km E SR 95 and 4.5 km NW Pyramid Butte 387 Comment
  UCSB42494  Muhlenbergia microsperma Roberts, Fred 1982-3-22 Santa Barbara 16 meters above stream bed; 0.5km N Field Station on north edge of Central Valley; Santa Cruz Island 115 Comment
  UCR247871  Muhlenbergia rigens Fred M. Roberts 2012-9-6 7696 Orange SAN JOAQUIN HILLS: Buck Gully, Buck Gully Trail, west end near Poppy Street entrance, 2.1 km WNW Pelican Hill summit. 37 Comment
  UCSB48199  Muhlenbergia rigens Roberts, Fred 1981-6-26 Orange Viejo Cyn., 0.4 km N Calif. Rte. 74; 2.7 km ENE San Juan Guard Station; Santa Ana Mts. 311 Comment
  UCR209389  Muilla maritima Fred M. Roberts, Brenda McMillan 1998-3-31 5101 Riverside Paloma Valley, vicinity of Murreta, Ferndale Lane on hill top, 1.4 km southwest of the intersection of Briggs Road and Scott Road 480 Comment
  UCR239648  Myoporum Fred M. Roberts 2012-5-9 7551 Orange Santa Ana Mountains, Lake Forest, near Serrano Creek utility road, 0.3 m south-southwest of intersection of Commercentre and Dimension Drives 206 Comment
  RSA0010806  Myoporum laetum Fred M. Roberts 2008-5-16 6977 Orange Dana Point: Dana Point Headlands, CNLM Preserve, along north slopes above Dana Strand Beach, 0.8km WNW Marine Institute, Dana Point Harbor. 45 Comment
  SD233638  Myriopteris newberryi Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5807 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242. 470 Comment
  UCSB54265  Nama aretioides Roberts, Dar 1984-4-28 Mono Fish Slough: desert wetland system 4.5 mi. north of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis; 2.7 miles S of Rocked-in-Spring; on E side of slough at BLM Spring 1341 Comment
  UCR209672  Nama stenocarpa Fred M. Roberts, Carol A. Roberts 1999-10-23 5254 Riverside San Jacinto Valley, Mystic Lake, northeast shore near Gilman Hot Springs Road, c. 1.8 km southwest of Eden Peak 433 Comment
  UCR247878  Nama stenocarpa Fred M. Roberts, Laura Cohen 2012-10-31 7714 Orange San Joaquin Hills, Upper Laguna Lake, north end. Laguna Coast Wilderness Park, c. 5.1 km east northeast of Signal Hill 113 Comment
  RSA681020  Nassella cernua Fred M. Roberts, David E. Bramlet 2003-3-13 5586 Orange Donna O'Neill Land Conservancy: Ridge west of Christianitos Canyon, 1.6 km NW Sycamore Gate., (33 deg 29'37N, 117 deg 34' 16 W [UTM: 11S-04 46 936mE, 37 05 965mN.] 207 Comment
  RSA548852  Nassella lepida Fred M. Roberts, H. Camp 1987-3-10 3218 Orange Caspers regional park: San Juan Canyon, BN of Hwy 74, 1.9km SW San Juan Hot Springs, UTM 3715600mN, 450 400m E, alt 229m. 229 Comment
  RSA749291  Nassella lepida Fred M. Roberts 1999-4-2 5169 Orange Lomas de Santiago: Loma Ridge, Dripping Springs Spur Rd., 2.3 km W Silverado Sch. and 5.1 km NW Bolero Lookout. 450 Comment
  UCSB52916  Nassella lepida Roberts, Fred 1983-3-10 Orange Dana Point Headlands; south of Scenic Drive, 0.3 km W Dana Point Harbor; 0.8 km S Richard Henry Dana School 60 Comment
  RSA535968  Nassella pulchra Fred M. Roberts 1989-4-17 4267 Orange Santa Ana Mtns: Central Blind Canyon, 7.3km SW Sierra Peak, 2.4km N Irvine Lake,, UTM 37 40 700 m N, 4 32 900m E. 259 Comment
  RSA542547  Nassella pulchra Fred M. Roberts 1988-2-9 3782 Orange Lomas De Santiago: Loma Ridge, 1.5km N Bee Survey Mark., UTM 373 3700m N, 435 200m E 385 Comment
  RSA743513  Nassella pulchra Fred M. Roberts 2008-4-9 6863 Orange Dana Point: Dana Point Headlands, CNLM Preserve near Outlook 2, 0.7 km W Marine Institute (Dana Point Harbor). 45 Comment
  RSA747596  Nassella pulchra Fred M. Roberts 2000-5-19 5329 Orange Lomas de Santiago: Loma Ridge, ridge west of Bee Peak above Bee Cyn. landfill, 0.2 km W Bee Peak. 500 Comment
  UCSB36123  Nassella pulchra Roberts, Dar 1980-4-25 Monterey Plaskett Creek Campground along a dirt road, W of the Main Campground 91 Comment
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Mar 22 2008
  RSA710410  Nasturtium officinale Fred M. Roberts 2005-10-3 6298 Orange San Juan Capistrano: San Juan Creek wash, La Novia Road Bridge to 100m E of bridge, 1.4km E Mission San Juan Capistrano, 27 Comment
  UCSB22521  Nasturtium officinale Roberts, M. 1967-5-9 Santa Barbara Ditch near junction of Highway 225 and Highway 101, Santa Barbara 60 Comment
  UCR114959  Navarretia fossalis Fred M. Roberts 1992-4-25 4871 Riverside San Jacinto Valley, Upper Salt Creek Watershed adjacent to Hemet, NW corner of California Avenue and Stowe Road, 3.3km ENE Winchester 455 Comment
  UCR162948  Navarretia fossalis Fred M. Roberts 1993-6-8 4884 Riverside San Jacinto River Valley; Perris, adjacent to San Jacinto River, N of Interstate 215, 0.51km N of Ellis Road and 2.4km west of San Jacinto Road 431 Comment
  SD135282  Navarretia hamata subsp. hamata Fred M. Roberts, Arthur Davenport 1993-7-25 4889 San Diego Carlsbad: Arroyo la Costa, south of Segovia Road, 5.5 km SW Lake San Marcos dam common on roads and in openings on gentle, north-facing slope at border of southern maritime chaparral and annual grassland 67 Comment
  RSA665941  Nemacaulis denudata var. denudata Fred M. Roberts 1997-4-29 5023 Orange Bolsa Chica Salt Marsh; (US Fish and Wildlife Service cell 60) west of old oil field, 1.1 km. S Chica Survey Mark. 2 Comment
  RSA588711  Nemophila menziesii var. integrifolia Fred M. Roberts 1990-5-22 4639 Orange Santa Ana Mountains; Upper Hot Springs canyon, just west of Falcon Group Camp, 1.9km ESE Los Pinos Peak. 994 Comment
  SJSU1717  Nephrolepis exaltata Robertson 1956-2-14 214561 Santa Clara 133 South 12th St., San Jose Comment
  RSA701973  Nicotiana glauca Fred M. Roberts, David E. Bramlet 2003-6-20 5925 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, tributary to Christianitos Cyn, along Back Road, 1.48 km WNW Sycamore Gate. 189 Comment
  RSA743470  Nicotiana glauca Fred M. Roberts, Lee Ann Carranza, Jeff Roseler 2008-10-9 7125 Orange Dana Point: Dana Point Headlands, CNLM Preserve, at base of cliff along south edge, 0.7 km W Marine Institute (Dana Point Harbor). 3 Comment
  RSA716093  Nolina cismontana Fred M. Roberts, Carol A. Roberts 2006-4-28 6323 Orange Mision Viejo: near Vista del Lago Dr., 0.9km NE jct. Vista del Lago and Los Alios Blvd., 1.7km NNW Lake Mission Viejo dam. 211 Comment
  UCR209367  Nolina cismontana Fred M. Roberts, Linda Farley 2008-3-28 6832 Orange Santa Ana Mountains, Upper Weir Canyon, Irvine Ranch Conservancy, 3.3 km east-northeast of Robbers Peak on ridge north of canyon 427 Comment
  POM888  Notholaena californica subsp. leucophylla G. Ross Robertson 1904-1 s.n. Riverside E. Riverside Co. desert. Comment
  SD143232  Nuttallanthus texanus Fred M. Roberts 1997-4-11 5005 San Diego Carlsbad: Upper Encinitas Creek watershed east of Rancho Santa Fe Rd, Fieldstone Southeast, ca. 5.7 km southwest Double Peak frequent on gentle east-facing slope in open mosaic of coastal sage scrub & native grassland that had burned in October 1996 88 Comment
  SD262616  Nuttallanthus texanus Jim Roberts, T. Chester, N. Accola, A. Ballway, M. Crouse 2015-3-16 118 San Diego Fallbrook; Gird Valley Preserve; just W of golf course; 0.30 miles WSW of junction Gird Road and Casablanca Way; ridge southwest of borrow pit. 153 Comment
  RSA725515  Nyctocereus serpentinus Fred M. Roberts, Robert L. Allen 2007-9-28 6615 Orange Silverado Cyn., along Silverado Cyn. Rd. at eastern edge of town of Silverado. 347 Comment
  UCR189550  Nyctocereus serpentinus Fred M. Roberts, R. L. Allen 2007-9-28 6615 Orange Santa Ana Mountains, Silverado Canyon, along Silverado Canyon Rd. at eastern edge of town of Silverado 347 Comment
  CAS-BOT-BC140334  Oemleria cerasiformis Robert Robertson 1954-4-10 67 Santa Clara By path near Page Mill Quarry 137 Comment
  CAS-BOT-BC171508  Oenothera californica Geo Robertson 1906-1-1 s.n. San Bernardino Mentone Comment
  RSA679092  Oenothera elata subsp. hirsutissima Fred M. Roberts 2003-7-24 5967 Orange San Juan Capistrono: San Juan Creek, c.a. 0.1 km NE La Novia Bridge. Along creek on cobbly sand of wash in open southern willow scrub and mulefat scrub. 27 Comment
  UCR211716  Oenothera laciniata Fred M. Roberts 2005-5-19 6262 Riverside Perris Basin, San Jacinto Valley, city of San Jacinto, east of Sanderson Road and south of the Ramona Expressway, 2.6 km south-southwest of Gilman Hot Springs 446 Comment
  RSA0029940  Oenothera speciosa Fred M. Roberts 2013-5-15 7772 Orange San Joaquin Hills: Buck Gully, north slope, Newport Beach, near Ocean Beach Drive, 1.8 km NW summit Pelican Hill. 122 Comment
  SD246972  Olea europaea Jim Roberts 2013-6-21 29 San Diego City of San Diego; Tecolote Canyon Natural Park; Mt. Etna Park entrance, 200m south of trailhead at south end of park, west of trail near runoff channel 81 Comment
  RSA704425  Opuntia littoralis Fred M. Roberts, David E. Bramlet 2004-7-30 6081 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Western slopes of Cristianitos Cyn., 0.25km W Sycamore Gate and Cristianitos Road. 151 Comment
  UCR223965  Opuntia littoralis Fred M. Roberts 2008-10-27 7127 Orange South Coast, Dana Point, Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8 km west northwest of Marine Institute, Dana Point Harbor 65 Comment
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Nov 20 2018
  UCR189549  Orcuttia californica Fred M. Roberts, Michelle Balk 2005-4-23 6175 Riverside Perris Basin, San Jacinto Valley: upper Salt Creek watershed, W of Hemet, NW corner of Stowe and California Rd., 3.6km ENE downtown Winchester 132 Comment
  RSA708238  Orobanche fasciculata Fred M. Roberts, Robert L. Allen, Chris Barnhill, Nancy Hatfield 2005-5-30 6233 Orange Southwest arm of Modjeska Peak, 1.2km SW summit, Main Divide Rd. near jct. of road to summit. 1533 Comment
  SEINET13756705  Orthocarpus cuspidatus subsp. copelandii J. H. Robertson, Y. Robertson 1979-7-19 s. n. Mono Bench near salt ground at road fork 2347 Comment
  RSA542379  Orthocarpus purpurascens Fred M. Roberts Jr. 1987-4-21 3387 Orange Aliso Viejo: Aliso Creek, Aliso Creek bike Trail. 3.0 km ENE Moulton Peak. 73 Comment
  RSA590943  Orthocarpus purpurascens Fred M. Roberts Jr. 1991-5-2 4784 Orange San Joaquin Hills: Laguna Canyon, Laguna Laurel, just west of Laguna Canyon Road. c.a. 2 km N jct. El Toro Road, 4.5 km E Signal Peak; 110 Comment
  IRVC28461  Osmadenia tenella Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5754 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  UCR209663  Osmadenia tenella Fred M. Roberts 2008-5-16 6984 Orange South Coast, Dana Point Headlands, Center for Natural Lands Mgmt. Preserve north of Marguerita Drive, 0.5 km west-northwest of the Marine Institute, Dana Point Harbor 75 Comment
  IRVC24743  Osmadenia tenella Fred M. Roberts 1986-4-29 2823 Orange Turtle Rock, above corner of Ridgerout Dr. and Turtle Rock Dr., 1.1km SE French Hill, Irvine 141 Comment
  UCSB48382  Osmadenia tenella Roberts, Jr., Fred 1982-5-22 Orange Laguna Niguel; Niguel Hill, near end of Pacific Island Road, 1.6 km. ENE Aliso Peak 295 Comment
  RSA691022  Oxalis albicans Fred M. Roberts, Andy Pinolo, Kam Muri 2003-5-3 5700 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed. 305 Comment
  IRVC28445  Oxalis albicans Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5700 San Diego Otay Mountain, south side near crest of ridge east of lower "Butteweg Canyon" along the border trail, Tijuana River watershed Peninsular Range, San Ysidro Mountains 305 Comment
  RSA684305  Oxalis albicans subsp. californica Fred M. Roberts 2003-3-13 5590 Orange Donna O'Neill Land Conservancy: Ridge west of Christianitos Canyon, 1,320m NW Sycamore Gate and 880m W Cristianitos Rd. 179 Comment
  SD164437  Oxalis californica Fred M. Roberts 2001-4-9 5411 San Diego Jamul Mtns.: SW slopes, NE of Upper Otay Lake, 5.4 km SE summit Mother Miguel Mtn. Otay Lakes North MSCP parcel. Knoll along ridge on gentle SW-facing slope in rocky, open coastal sage scrub and annual grassland 309 Comment
  UCSB48385  Oxalis californica Roberts, Fred 1982-4-18 Orange San Juan Canyon, Hwy 74, 0.6km SW Lower San Juan Picnic Ground; 1.9km WNW Sitton Peak, Santa Ana Mtns. 420 Comment
  RSA737550  Oxalis pes-caprae Fred M. Roberts 2008-3-12 6738 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, c.a. 0.8 km W Marine Institute (Dana Point Harbor). 50 Comment
  SEINET11602286 Image available Packera cana J. Robertson, Y. Robertson 1979-7-20 s.n. Mono Star City, NW of buildings; Sweetwater Mountains 2591 Comment
  SEINET11744726 Image available Packera multilobata J. H. Robertson, Y. Robertson 1975-6-20 s.n. Mono Masonic Hills, 5.9 mi. from HW 182 as of Nev, map atlas 8-11; 2.4 mi. from NF 2499 Comment
  SEINET11744768 Image available Packera multilobata J. Robertson, Y. Robertson 1979-6-20 s.n. Mono Masonic Hills, 5.9 miles from Hwy 182, 2.4 miles from NF boundary. 2499 Comment
  SEINET11745005 Image available Packera werneriifolia J. H. Robertson, Y. Robertson 1979-7-20 s.n. Mono Star City. Rockfield NW of buildings. Site 106. 2591 Comment
  RSA588782  Paeonia californica Fred M. Roberts, Nicole Orlik 1990-4-11 4716 Orange Santa Ana Mountains: East Fork Upper Long Canyon, along Main Divide Truck Trail, 4.4 kilometers SE Los Pinos Peak. 750 Comment
  RSA715697  Panicum capillare Fred M. Roberts, Chris M. Barnhill 2005-9-27 6278 Orange San Juan Capistrano: San Juan Creek wash, east of La Novia Road bridge, 1.4km E Mission San Juan Capistrano, 27 Comment
  RSA773552  Panicum capillare Fred M. Roberts 2008-6-3 7032 Orange Lomas de Santiago: Loma Ridge, East Fork Rattlesnake Canyon, ca. 2.6 km NE Rattlesnake Reservoir spillway and 2.4 km ENE Bee Peak 225 Comment
  UCR188996  Panicum dichotomiflorum subsp. dichotomiflorum Fred M. Roberts, S. Leatherman 2007-9-19 6590 Riverside Santa Ana Canyon, Santa Ana River, across from Green River Golf Course, 0.15 km W of Green River Road bridge 128 Comment
  SD214035 Image available Panicum hillmanii Fred Roberts 2007-6-7 6521 San Diego Rancho Santa Fe: Osuna Valley, north side of Calzada del Bosque Rd., 0.2 km E jct. with Via de la Valle Rd. and 1.7 km SSW Rancho Santa Fe towncenter. 10 Comment
  RSA542447  Papaver californicum Fred M. Roberts 1988-3-9 3844 Orange Laguna Beach, Goff Ridge, along Nyes Place, 0.9km NE Goff Island. 169 Comment
  RSA594891  Papaver californicum Fred M. Roberts, Sandy Leatherman, B. Leatherman 1994-4-24 4904 Orange Santa Ana Mountains: San Juan Canyon, south side of CA route 74, 1.2 kilometers SW Lower San Juan Picnic Ground. 390 Comment
  RSA542524  Parietaria hespera var. californica Fred M. Roberts Jr. 1989-3-22 4223 Orange San joanquin Hills: Temple hill, Dripping Springs Cave, lateral to Wood Canyon; 2.6 km S moulton Peak. 76 Comment
  RSA542349  Parietaria hespera var. hespera Fred M. Roberts Jr. 1987-4-21 3382 Orange Aliso Viejo: Aliso Creek, Aliso Creek bike Trail. 3.0 km ENE Moulton Peak. 73 Comment
  SD247249  Parietaria hespera var. hespera Jim Roberts 2013-5-22 16 San Diego City of San Diego; Tecolote Canyon Natural Park; S of Balboa Avenue; 300 yards ESE of junction Ute Drive and Cowley Way 54 Comment
  UCR128377  Parietaria hespera var. hespera Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5715 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  IRVC24070  Parkinsonia aculeata Fred M. Roberts 1985-8-23 2175 Orange Mission Viejo; San Diego Fwy. (I-5), 0.9km N Oso Pkwy., on west side. Southern Coastal 121 Comment
  RSA488134  Parkinsonia aculeata Fred M. Roberts 1985-8-23 2175 San Diego Mission Viejo, San Diego Fwy, 0.9km N Oso Pwy, on W side, 3716450m N, 43 7740m E, alt 121m. 121 Comment
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Sep 8 2016
  RSA710413  Paspalum distichum Fred M. Roberts 2005-10-3 6301 Orange San Juan Capistrano: San Juan Creek wash, La Novia Road Bridge to 100m E of bridge, 1.4km E Mission San Juan Capistrano, 27 Comment
  UCSB54318  Paspalum distichum Roberts, Dar 1983-7-23 Inyo Fish Slough; 1 mile N of jct. of Fish Slough Rd. and Jean Blanc Rd. at barrier separting slough from Owens River canal Comment
  RSA450843  Pectocarya linearis subsp. ferocula Fred M. Roberts 1983-3-16 929 Orange Laguna Beach, Sycamore Hills, central ridge, 1.5km NNE jct E1 Toro and Laguna Canyon road, 5.5km ESE Signal Peak. 160 Comment
  UCSB38429  Pectocarya linearis subsp. ferocula Roberts, Dar 1981-3-23 Santa Barbara 0.75 km. north of Field Station in Central Valley, Santa Cruz Island 183 Comment
  RSA0127410  Pectocarya linearis var. ferocula Fred M. Roberts 2016-3-17 8005 Orange San Joaquin Hills: City of Irvine, Bommer Canyon, east fork, 0.3 km ESE Cattle Camp near East Fork Trail. 152 Comment
  UCR211709  Pectocarya recurvata Fred M. Roberts, Michelle Balk 2006-5-1 6326 Riverside Perris Basin, Old Salt Creek watershed, South Hemet Hills, west of California Ave, c. 2.8 km southwest of the west end of Hemet Ryan Airport runway 483 Comment
  UCSB36178  Pectocarya setosa Roberts, Dar 1980-5-31 Ventura E. side of Hwy. 33; 8 km. by road S of Pine Mountain Summit 1400 Comment
  UCR209668  Pellaea andromedifolia Fred M. Roberts 2008-4-16 6908 Orange South Coast, Dana Point Headlands, Center for Natural Lands Mgmt. Preserve, 0.8 km west of the Marine Institute, Dana Point Harbor 45 Comment
  UCSB48093  Pellaea andromedifolia Roberts, Fred 1981-4-12 Orange Santa Ana Mtns.: San Juan Canyon, Hwy 74, 1.3km by road E of San Juan Guard Station, 0.9km SE Juan Rancho SM 295 Comment
  POM22835  Pellaea andromedifolia var. andromedifolia G. Ross Robertson s.n. San Bernardino Mentone, brush country 579 Comment
  SD256360  Pellaea andromedifolia var. andromedifolia Jim Roberts 2015-3-16 111 San Diego Fallbrook; Gird Valley Preserve; N of borrow pit; 0.21 miles WSW of junction Gird Road and Casablanca Way; steep part of trail from parking to borrow pit 123 Comment
  SD256361  Pellaea andromedifolia var. pubescens Jim Roberts 2015-2-10 76 San Diego City of San Diego; Tecolote Canyon Natural Park; east side of use trail near houses about 300m southwest from September Street entrance. 68 Comment
  IRVC28212  Pellaea mucronata Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5780 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  UCR128531  Pellaea mucronata Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5780 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 427 Comment
  UCSB52421  Pellaea mucronata Roberts, Fred; Meyers, J. 1982-11-7 Orange Santa Ana Mtns.; Lion Canyon, Chiquito Basin Trail, 3.6 km. S Blue Jay Campground; 2.4 km. NNE lower San Juan Campground 800 Comment
  POM849  Pellaea mucronata subsp. californica G. Ross Robertson 1904-1 s.n. San Bernardino Forest Home in Mill Creek Canyon Comment
  IRVC20364  Pellaea mucronata var. mucronata Fred M. Roberts, D. A. Roberts 1983-3-22 935 Orange San Juan Canyon, above Hwy 74, 2.7km ENE San Juan Guard Sta.; 3.6km SSW Sugar Loaf Pk., Santa Ana Mountains 407 Comment
  RSA701799  Pennisetum setaceum Fred M. Roberts, David E. Bramlet 2003-6-6 5893 Monterey Rancho Mission Viejo: Donna O'Neill Land Conservancy, west slopes of Cristianitos Canyon, 0.86 km SSW Gato Gate and 0.39 km W of Cristianitos Road Comment
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Oct 28 2018
  UCR236680  Pennisetum villosum Fred M. Roberts, Sandra L. Leatherman 2008-9-17 7102 Orange Peninsular Ranges, Santa Ana River Canyon: Yorba Linda Regional Park adjacent to Santa Ana River, South of La Palma Ave. and 1.7 km ENE Imperial Hwy. bridge over river 87 Comment
  SD262639  Penstemon X parishii Jim Roberts 2014-5-28 65 San Diego Cuyamaca Rancho State Park; west side of Stonewall Creek Fire Road; 1.50 miles N of intersection with Harper Fire Road; near 0.83 mi E of Stonewall Peak. 1413 Comment
  SD188270  Penstemon centranthifolius Laurie Roberts, Lane McClelland 2006-5-29 14 San Diego Descanso. NW base of Guatay peak, along Old Highway 80, just NE of its intersection with SR- 79. 1098 Comment
  RSA708368  Penstemon grinnellii subsp. grinnellii Fred M. Roberts, Robert L. Allen, Chris Barnhill, Nancy Hatfield 2005-5-30 6244 Orange Modjeska Peak, west slope along summit road, 0.15km by air W summit. 1613 Comment
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Sep 29 2007
  SEINET5328721 Image available Penstemon humilis var. humilis J. Robertson, Y. Robertson 1979-6-21 s.n. Mono Upper Town, 1/10 mi. S of sign Sweetwater 8, Bridgeport 12, above small rock palisade. 2591 Comment
  SBBG66550  Penstemon labrosus G. Robertson 1903-8-20 51 Unknown on San Pedro Martir Mtn 1524 Comment
  SEINET5329835 Image available Penstemon speciosus J. Robertson, Y. Robertson 1979-7-18 s.n. Mono old cabin near S Fk of Sweetwater Cr. 2987 Comment
  RSA542377  Penstemon spectabilis Fred M. Roberts 1988-3-15 3856 Orange Rancho Mission Viejo: Verdugo Canyon, 0.8 km SE Lucas Survey Mark. 247 Comment
  SD164540  Pentachaeta aurea Fred M. Roberts, Fred T. Sproul 2003-5-6 5822 San Diego Miramar Marine Corp Air Station: mesa north of Rose Canyon, 170 m E Santa Fe RR tracks and 0.46 km S Miramar Rd. Mesa top on clay barren in opening of chamise chaparral near vernal pool. 117 Comment
  SD164541  Pentachaeta aurea Fred M. Roberts 2001-5-2 5449 San Diego La Jolla Valley: 4S Ranch MSCP parcel, 0.4 km SSW Sol Survey Marker. S-facing slope along ridge on clay barren in open, burned coastal sage scrub 213 Comment
  UCSB52875  Pentachaeta aurea Roberts, Fred; Allen, R. 1983-3-27 Orange Dana Point Headlands; north of Dana Strand Rd., 0.5 km. W Dana Point Harbor; 0.7 km. SSW Richard Henry Dana School 79 Comment
  SD256367  Pentagramma triangularis Jim Roberts 2015-2-11 80 San Diego City of San Diego; Tecolote Canyon Natural Park; trail east from September Street entrance, about 230 yards SE of intersection September Street and Burgener Blvd. 53 Comment
  RSA0065226  Pentagramma triangularis G. Ross Robertson s.n. San Bernardino Mentone. 609 Comment
  IRVC20439  Pentagramma triangularis subsp. triangularis Fred M. Roberts, K. G. Marsh 1983-5-26 1093 Orange Dana Point Headlands: 0.5km W Dana Point Harbor; 0.8km SSW Richard Henry Dana School Southern Coastal 82 Comment
  UCSB47969  Peritoma arborea Roberts, Jr., Fred 1980-2-17 Orange Dana bluffs along Scenic Drive Road, northwest of and above Dana Point Harbor, Dana Point 58 Comment
  SD256489  Peritoma arborea var. arborea Jim Roberts 2014-2-18 56 San Diego City of San Diego; Del Cerro; Navajo Canyon Open Space; on north side of trail about 0.13 mi E of intersection Birchwood and Carthage Streets 96 Comment
  RSA681281  Perityle emoryi Fred M. Roberts, Andy Pinolo, Kam Muri 2003-5-3 5699 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of ridge east of lower Butteweg Canyon along the border trail, Tijuana River watershed. 305 Comment
  SD233758  Perityle emoryi Fred M. Roberts, A. Pinolo, K. Muri 2003-5-3 5699 San Diego Peninsular Range, San Ysidro Mnts.: Otay Mountain, south side near crest of ridge east of lower Butteweg Canyon along the border trail, Tijuana River watershed 305 Comment
  RSA0043359  Persicaria lapathifolia Fred M. Roberts, Laura Cohen 2012-10-31 7716 Orange San Joaquin Hills: Laguna Lake 1 (Upper Laguna Lake), north end. Laguna Coast Wilderness Park, ca. 5.1 km ENE Signal Hill. 113 Comment
  UCSB39529  Persicaria lapathifolia Roberts, Fred; Steele, Kelly 1981-10-9 Santa Barbara at road crossing on extreme east of Central Basin Slope (Area 2C); More Mesa, along the Pacific Ocean, south of Atascadero Creek, adjacent to and west of Hope Ranch Park, ca. 3 km southeast of Goleta. 40 Comment
  RSA718965  Petunia parviflora Fred M. Roberts, Robert L. Allen 2006-10-8 6415 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 03.km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  UCR209674  Petunia parviflora Fred M. Roberts, Carol A. Roberts 1999-10-23 5252 Riverside San Jacinto Valley, Mystic Lake, northeast shore near Gilman Hot Springs Road, c. 1.8 km southwest of Eden Peak 433 Comment
  RSA539386  Phacelia brachyloba Fred M. Roberts, Carol A. Roberts 1988-6-2 4043 Orange Santa Ana Mtns: Maple Spirngs Truck Trail, 8.7km above Silverado Gate, 2.4km N Modjeska Peak. 1155 Comment
  RSA588659  Phacelia brachyloba Fred M. Roberts, Carol A. Roberts 1990-5-23 4648 Orange West Fork, Upper Long Canyon, near Main Divide Truck Trail, 4.5km SE Los Pinos Peak. 756 Comment
  HSC79312  Phacelia campanularia subsp. vasiformis Roberta G. Robertson 1974-3-29 173 San Bernardino Old Woman Mtns. E base, 111 air mi. ESE of Barstow, 19.2 mi. S of jct. Hwy. 66 and Sunflower Springs Rd., 3 mi. W of unnamed dirt rd. 1098 Comment
  RSA679097  Phacelia cicutaria subsp. hispida Fred M. Roberts 2003-6-25 5952 Orange Santa Ana Mountains: Mojeska Peak in Upper Cold Springs Cyn., north of Main divide Truck Trail, 0.4 km ESE summit. 1471 Comment
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Jan 25 2007
  IRVC28447  Phacelia cicutaria var. hispida Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5707 San Diego Otay Mountain, south side near crest of ridge east of lower "Butteweg Canyon" along the border trail, Tijuana River watershed Peninsular Range, San Ysidro Mountains 305 Comment
  SD234887  Phacelia cicutaria var. hispida Fred M. Roberts, Andy Pinolo, Kam Muri 2003-5-3 5707 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of ridge east of lower Butteweg Canyon along the border trail, Tijuana river watershed. 305 Comment
  UCR128854  Phacelia cicutaria var. hispida Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5803 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 470 Comment
  RSA539411  Phacelia curvipes Fred M. Roberts, Carol A. Roberts 1988-6-9 4070 Orange Santa Ana Mountains: Main Divide Truck Trail, Modjeska Peak, west slope, 0.5 km NNW summit. 1417 Comment
  RSA751985  Phacelia distans Fred M. Roberts 2008-3-26 6800 Orange Dana Point: Dana Point Headlands, CNLM Preserve near NE Gate, 0.5km W Marine Institute (Dana Point Harbor). 75 Comment
  UCR215310  Phacelia distans Fred M. Roberts 2008-3-26 6800 Orange South Coast, Dana Point; Dana Point Headlands, Center for Natural Lands Mgmt. Preserve near NE gate, 0.5 km west of Marine Institute, Dana Point Harbor 75 Comment
  UCR224159  Phacelia distans Fred M. Roberts 2008-3-20 6789 Orange South Coast, Dana Point Headlands, Center for Natural Lands Mgmt. Preserve, 0.8 km west of the Marine Institute, Dana Point Harbor 60 Comment
  RSA542476  Phacelia distans Fred M. Roberts, T. Sholars 1988-3-29 3877 Orange San Joaquin Hills: Laguna Canyon along Laguna Canyon road, 2kim by road N Pacific Coast Hwy, 2.1km E guna Survey Marker. 34 Comment
  RSA542474  Phacelia minor Fred M. Roberts 1988-3-15 3851 Orange Rancho Mission Viejo: Verdugo Canyon, 2.6 km ENE Point Rancho Survey Mark. 149 Comment
  RSA552939  Phacelia minor Fred M. Roberts, Carol A. Roberts 1989-4-20 4296 Orange Santa Ana Mtns: Upper Lion Canyon along San Juan Trail just south of Blue Jay Campground, 2.5km SE Los Pinos Peak. 980 Comment
  UCSB48211  Phacelia minor Roberts, Jr., Fred 1981-5-3 Orange Santa Ana Mtns.; Hot Springs Canyon, 1.3 km. NNE San Juan Guard Station 276 Comment
  RSA0126619  Phacelia parryi Fred M. Roberts 2012-4-24 7515 Orange San Joaquin Hills: Buck Gully, W of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km W Signal Peak. 179 Comment
  RSA788910  Phacelia parryi Fred M. Roberts 2008-6-26 7062 Orange Lomas de Santiago: Loma Ridge along West Loma Ridge Road, c.a. 1 km N Haul Rd., 2.5 km NNW Bee Peak, Irvine Ranch Land Conservancy. 382 Comment
  UCSB52927  Phacelia parryi Roberts, Jr., Fred 1983-3-16 Orange Laguna Beach; Sycamore Hills, central ridge, 1.1 km. NNE jct. El Toro and Laguna Canyon Rds.; 5.4 km. ESE Signal Peak 156 Comment
  RSA773554  Phacelia ramosissima var. latifolia Fred M. Roberts 2008-6-3 7030 Orange Lomas de Santiago: Loma Ridge, East Fork Rattlesnake Canyon, ca. 2.6 km NE of Rattlesnake Reservoir spillway and 2.4 km ENE Bee Peak 235 Comment
  IRVC22741  Phalaris aquatica Fred M. Roberts 1985-5-15 1802 Orange El Toro Canyon, El Toro Rd., 1.1km NE jct. Laguna Canyon Rd., Aliso Viejo 88 Comment
  UCR162952  Phalaris lemmonii Fred M. Roberts, R. E. Riefner Jr. 2005-3-31 6139 Riverside Upper Salt Creek, W of Hemet, 200m east of Calif. Rd and 300m south of Stetson Rd, 1.8km WSW Ryan Field 456 Comment
  IRVC22183  Phalaris minor Fred M. Roberts 1985-4-11 1642 Orange Dana Point Headlands; Weyerhaeuser Horticultural Research Station property. Southern Coastal 61 Comment
  RSA0027433  Phalaris minor Fred M. Roberts 2013-7-18 7667 Orange San Joaquin Hills: Newport Beach, Buck Gully, along Buck Gully Trail, about 0.7 km from the north terminus of Poppy Street and 1.8 km WNW summit of Pelican Hill. 52 Comment
  UCR128519  Phalaris minor Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5709 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed 305 Comment
  UCSB47955  Phalaris minor Roberts, Dar 1980-5-4 Orange Camino Capistrano Rd. below bridge (Crown Valley Pkwy.) 30 Comment
  RSA708230  Phalaris paradoxa Fred M. Roberts, Robert L. Allen, Chris Barnhill, Carol A. Roberts 2005-4-10 6163 Orange Costa Mesa: Fairview Park, west of north end of Canyon Drive, c.a. 0.2km WNW Marison Special Education Center (Canyon Sch. on topos). 24 Comment
  RSA615547  Phoenix canariensis Fred M. Roberts 1997-10-22 5051 Orange Bolsa Chica saltmarsh: north of Garden Grove East Wintersburg Channel, 0.6 km S Chica Survey Marker. 0 Comment
  RSA708721  Phoenix dactylifera Fred M. Roberts, Robert L. Allen, Chris Barnhill 2004-8-21 6115 Orange Caspers Wilderness Park, San Juan Cyn., Old San Juan Hot Springs, c.a. 0.4km SW San Juan Ranger Station, north of SR 74. 214 Comment
  CAS-BOT-BC222642  Pholistoma auritum var. auritum Robert Robertson 1954-5-17 158 Santa Clara S. of Stanford University golf course 36 Comment
  SD164452  Pholistoma racemosum Fred M. Roberts 2001-4-9 5404 San Diego Jamul Mtns.: SW slopes, NE of Upper Otay Lake, 5.4 km SE summit Mother Miguel Mtn. Otay Lakes North MSCP parcel. Knoll along ridge on mostly gentle SW-facing slope in rocky, open coastal sage scrub and annual grassland 309 Comment
  UCR128558  Pholistoma racemosum Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5743 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  RSA701967  Phoradendron macrophyllum subsp. macrophyllum Fred M. Roberts 2003-6-20 5929 Orange Rancho Mission Viejo: Donna O'Neil Land Conservancy, Cristianitos Cyn., along Shady Canyon Trail, 84 meters N Sycamore Gate and 50 meters W Cristianitos Rd. 101 Comment
  RSA0127348  Physalis crassifolia Fred M. Roberts 2016-5-3 8051 Orange City of Irvine: San Joaquin Hills, Turtle Rock Community above Ridgeline Road, 0.7 km ESE summit of French Hill. 107 Comment
  SEINET5341638  Physaria kingii subsp. kingii J. Robertson, Y. Robertson 1979-6-21 s.n. Mono Toiyabe NF, 19 miles from NF boundary; 20.6 miles from Hwy 182, 2.8 miles from Masonic upper Town. 2682 Comment
  UCR128856  Pickeringia montana subsp. tomentosa Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5804 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 470 Comment
  IRVC21696  Picris echioides Fred M. Roberts 1984-8-6 1367 Orange UC Irvine, along Adobe Circle Road, 0.9km ENE campus center; 2.3km W French Hill, Irvine 30 Comment
  RSA703088  Picris echioides Fred M. Roberts, Art Davenport 2003-9-11 6006 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy. Cristianitos Cyn., 0.79 km N Sycamore Gate 0.23 km w of Crisianitos Road. 126 Comment
  RSA708231  Pilularia americana Fred M. Roberts, Robert L. Allen, Chris Barnhill, Carol A. Roberts 2005-4-10 6160 Orange Costa Mesa: Fairview Park, west of north end of Canyon Drive, c.a. 0.2km WNW Marison Special Education Center., (Canyon Sch. on topos). 24 Comment
  UCR162943  Pilularia americana Fred M. Roberts 1995-5-24 4944 Riverside Hemet, Upper Salt Creek drainage, N of Florida Avenue (State Route 74) and west of Warren Road, c. 1.6 km NW Ryan Field 548 Comment
  UCSB50115  Pinus balfouriana Roberts, Fred 1981-5-10 Inyo End of Onion Valley Road, Sierra Nevada Mountains 3018 Comment
  IRVC20775  Pinus coulteri Fred M. Roberts 1980-5-3 68 Orange Main Divide Truck Trail, 0.6km SE Trabuco Peak, Santa Ana Mountains 1259 Comment
  RSA731002  Pinus coulteri Fred M. Roberts, B. Allen, D. Olsen 2007-1-19 6504 Orange Beek s Place along Main Divide Rd., 4.1 km NW Pleasant Peak. 852 Comment
  UCSB47634  Pinus coulteri Roberts, Fred 1980-5-3 Orange On west side of road; Main Divide Truck Trail, 0.6 km. southeast of Trabuco Peak, Santa Ana Mtns. 1259 Comment
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Nov 8 2007
  RSA539395  Pinus radiata Fred M. Roberts, Carol A. Roberts 1988-11-3 4163 Orange Santa Ana Mtns.: Upper Trabuco Canyon near Main Divide Truck Trail, 1.3km NE Los Pinos Peak 1268 Comment
  RSA550612  Piperia cooperi Fred M. Roberts, Carol A. Roberts 1989-4-20 4308 Orange Santa Ana Mountains: upper Lion Canyon along San Juan Trail just S of Blue Jay Campground, 2.5kilometers SE Los Pinos Peak. 1000 Comment
  RSA749312  Piperia cooperi Fred M. Roberts 1999-4-22 5193 Orange Lomas de Santiago: ridges between Limestone Cyn. and Santiago Creek wash opposite mouth Williams Cyn., 2.0 km SE Silverado Sch. and 2.2 km NNW Bolero Lookout. 400 Comment
  RSA725506  Piptatherum miliaceum Fred M. Roberts 2007-9-11 6569 Orange Aliso Viejo: tributary to Aliso Creek on west side of Moulton Pkwy., 0.2 km N Aliso Viejo Pkwy., adj. to Kinder Care Learning Center. 83 Comment
  RSA731802  Piptatherum miliaceum Fred M. Roberts, Sandy Leatherman 2007-11-9 6637 Orange Santa Ana Mtns.: San Juan Canyon, Lower San Juan Picnic Ground. 408 Comment
  UCSB36166  Piptatherum miliaceum Roberts, Dar 1980-5-29 Santa Barbara S. end of bike bridge, above Goleta slough near main entrance to UCSB from freeway 6 Comment
  UCSB48027  Piptatherum miliaceum Roberts, Fred 1980-7-7 Orange Santa Ana Mts.; San Juan Canyon, Calif. Rte. 74, 2.2 km. ENE San Juan Guard Station; 0.6 km. W Bench Mark 1100 305 Comment
  UCSB48208  Piptatherum miliaceum Roberts, Fred 1981-7-8 Orange Rancho Mission Viejo; Calif. Rte. 74, 9.2 km. ENE San Juan Capistrano 100 Comment
  UCR128857  Pityrogramma triangularis var. viscosa Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5806 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 470 Comment
  SD164520  Plagiobothrys collinus var. gracilis Fred M. Roberts 2001-4-9 5412 San Diego Jamul Mtns.: SW slopes, NE of Upper Otay Lake, 5.4 km SE summit Mother Miguel Mtn. Knoll along ridge on gentle SW-facing slope in rocky, open coastal sage scrub and annual grassland 309 Comment
  UCR114956  Plagiobothrys leptocladus Fred M. Roberts 1992-4-25 4869 Riverside San Jacinto Valley, Upper Salt Creek Watershed adjacent to Hemet, NW corner of California Avenue and Stowe Road, 3.3km ENE Winchester 455 Comment
  UCR162957  Plagiobothrys leptocladus Fred M. Roberts, D. E. Bramlet 2005-4-1 6153 Riverside Upper Salt Creek, W of Hemet, parcel between Devonshire and Florida, c. 0.2km N of Florida and 0.2km W San Diego Aquaduct; c. 2km NW Ryn Field 457 Comment
  UCR211730  Plagiobothrys leptocladus Fred M. Roberts, D. E. Bramlet 2005-5-5 6180 Riverside Perris Basin, San Jacinto Valley, along MWD canal just north of Devonshire Road and west of Warren Road 458 Comment
  RSA542654  Plagiobothrys nothofulvus Fred M. Roberts 1988-4-10 3903 Orange Lomas De Santiago: Loma Ridge, Upper Limestone Canyon, c.a. 3.2 kilometer NNW Bolero Lookout. 347 Comment
  SD185605  Plagiobothrys nothofulvus Laurie Roberts, Lane McClelland 2006-5-2 5 San Diego Descanso. Just N of I-8, ca. 1 1/3 mi E of its intersection with SR-79. 1098 Comment
  UCSB48118  Plagiobothrys nothofulvus Roberts, Fred 1982-4-3 Orange Rancho Mission Viejo: Calif. 47; 7.2 km. by road E San Juan Capistrano; 1.3 km NE Viejo Survey Marker 98 Comment
  RSA588771  Plagiobothrys tenellus Fred M. Roberts, Carol A. Roberts, D. E. Bramlet 1990-5-6 4593 Orange Santa Ana Mnts.: Chiquito Basin, San Juan Trail, c.a. 2.5 km SSE Los Pinos Peak. 915 Comment
  UCR211722  Plantago coronopus Fred M. Roberts 2005-5-26 6211 Riverside Perris Basin, San Jacinto Valley, city of San Jacinto, between the Ramona Expressway and Ramona Blvd, 0.2 km north of the latter, 1.9 km southwest of Gilman Hot Springs 442 Comment
  UCR162939  Plantago elongata Fred M. Roberts, D. E. Bramlet 2005-4-1 6148 Riverside Upper Salt Creek, W of Hemet, parcel between Devonshire and Florida, c. 0.2km N of Florida and 0.2km W San Diego Aquaduct; c. 2km NW Ryn Field 457 Comment
  RSA542449  Plantago erecta Fred M. Roberts 1988-3-15 3868 Orange Rancho Mission Viejo: Central Gabino Canyon, 7km E Playa Survey Marker, 162 Comment
  RSA681952  Plantago erecta Fred M. Roberts, D. E. Bramlet 2003-3-7 5564 Orange Donna O'Neill Land Conservancy; West slopes of Christianitos Canyon, Middle Ridge Trail, 0.1km NW Gato Gate. 123 Comment
  UCR209373  Plantago erecta Fred M. Roberts, Linda Farley 2008-3-28 6815 Orange Santa Ana Mountains, Upper Weir Canyon, Irvine Ranch Conservancy, east fork along ridge just west of SR 241, 3.4 km east of Robber's Peak 437 Comment
  UCSB47575  Plantago erecta Roberts, Fred 1980-4-3 Orange 1.0km NE Dana Hills High School; Dana Point 75 Comment
  SD188133  Plantago lanceolata Laurie Roberts, Lane McClelland 2006-5-29 20 San Diego Descanso. NW base of Guatay peak, along Old Highway 80, just NE of its intersection with SR- 79. 1098 Comment
  UCSC008957  Plantago lanceolata Madison Roberts 2015-2-9 MR 1 Santa Cruz Santa Cruz, UCSC Campus, grassland in front of Faculty Housing Comment
  UCSB53374  Plantago major Roberts, Dar 1983-7-23 Inyo Fish Slough: a desert wetland system 4.5 mi. north of Bishop; at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis 1341 Comment
  UCSB52420  Plantago major Roberts, Fred; Marsh, K. 1982-10-18 Orange Laguna Beach; east flank of Temple Hill, along east margin of Top of the World School 295 Comment
  RSA688865  Plantago virginica Fred M. Roberts, D. E. Bramlet 2003-4-10 5654 Orange Rancho Mission Viejo: Donna O'Neill Land conservancy, ridges west of Christianitos Cyn., 1.41km SW Gato Gate and 1.19km W Christianitos Rd. Along south-running ridge on old dirt road. 184 Comment
  RSA747622  Platystemon californicus Fred M. Roberts 2008-4-16 6910 Orange Dana Point: Dana Point Headlands, CNLM Preserve, 0.8 km W Marine Institute, Dana Point Harbor. 45 Comment
  SD263779  Pluchea odorata var. odorata Jim Roberts 2014-11-24 74 San Diego City of San Diego; Ruffin Canyon Open Space; about 105 yards ESE of intersection Gramercy Street and Pasternack Place; west of Taft Middle School in wet ground 98 Comment
  CAS-BOT-BC254544  Poa douglasii Robert Robertson 1954-5-1 128 San Mateo At back of beach N of San Gregorio Creek 6 Comment
  SEINET7843700  Poa leptocoma J. Robertson, Y. Robertson 1979-7-18 s.n. Mono North Fork, Sweetwater Cr. Crek bank at trail crossing 2804 Comment
  IRVC22697  Poa scabrella Fred M. Roberts 1985-5-9 1762 Orange Santa Ana Mountains: Upper McVicker Canyon, 1.8km NE Los Pinos Peak. Peninsular Ranges 1113 Comment
  IRVC24561  Poa secunda Fred M. Roberts 1986-4-11 2782 Orange San Juan Canyon, Hwy 74, 1.2km SSW Lower San Juan Picnic Ground, Santa Ana Mountains 378 Comment
  IRVC25406  Poa secunda Fred M. Roberts 1987-4-3 3330 Orange San Joaquin Hills; Irvine; central Shady Canyon, 2.9km NE Signal Hill. Central coastal 107 Comment
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Feb 17 2017
  RSA542546  Poa secunda Fred M. Roberts 1988-2-18 3804 Orange Lomas de Santiago: Ridge west of Irvine Lake, 1.0 km NW Santiago Dam spillway 244 Comment
  RSA542549  Poa secunda Fred M. Roberts 1988-2-9 3777 Orange Lomas de Santiago: Loma Ridge, 1.3 km N Bee Survey Mark., UTM 3733600m N, 434800m E 381 Comment
  UCSB36167  Poa secunda subsp. juncifolia Roberts, Dar 1980-5-22 Kern 3 miles E on Calif. 155 from junct. with Bakersfield-Glennville Rd. 850 Comment
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Nov 14 2014
  RSA704935  Poa secunda subsp. secunda Fred M. Roberts, David E. Bramlet 2004-4-21 6033 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Shady Canyon, tributary to Cristianitos Cyn., 0.55 km NW Sycamore Gate, 0.58 km W of Cristianitos Road. 134 Comment
  RSA749472  Poa secunda subsp. secunda Fred M. Roberts, Linda Farley 2008-3-28 6827 Orange Santa Ana Mtns.: Upper Weir Cyn., Irvine Ranch Conservancy, 3.3 km ENE Robbers Peak on ridge north of canyon. 427 Comment
  UCR209369  Poa secunda subsp. secunda Fred M. Roberts, Linda Farley 2008-3-28 6827 Orange Santa Ana Mountains, Upper Weir Canyon, Irvine Ranch Conservancy, 3.3 km east-northeast of Robbers Peak on ridge north of canyon 427 Comment
  RSA716658  Polycarpon tetraphyllum Fred M. Roberts 2005-5-13 6187 Orange San Juan Capistrano; Ortega Ranch Business Center site, between Rancho Viejo Rd. and I-5 freeway adjacent to Horno Creek; 0.6km NE Mission San Juan Capistrano. 54 Comment
  UCSB50635  Polygala californica Roberts, Fred 1982-7-9 Orange SANTA ANA MTNS.: Upper Hot Springs Canyon, 0.1km SW Falcon Group Camp: 2.0km SE Los Pinos Peak 327 Comment
  RSA743378  Polygonum aviculare Fred M. Roberts 2008-4-9 6858 Orange Dana Point: Dana Point Headlands, CNLM Preserve near Outlook 2, 0.7 km W Marine Institute (Dana Point Harbor). 52 Comment
  UCSB48371  Polygonum aviculare Roberts, Fred 1982-5-22 Orange DANA POINT: jct. of Stone Hill and Selva Rds 1.0km ESE Dana Hills High School; 1.7km SW Marco Forster Junior High School 12 Comment
  RSA666101  Polygonum aviculare subsp. aviculare Fred M. Roberts, Michelle Lee 2001-6-4 5485 Orange Rancho Mission Viejo: Chiquita Ridge, 0.3km WNW Median Rancho Survey Marker. PCR Vernal Pool 4. (Canada Gobernadora. 226 Comment
  RSA717156  Polygonum lapathifolium Fred M. Roberts, Chris M. Barnhill 2005-9-27 6274 Orange San Juan Capistrano: San Juan Creek wash, east of La Novia Road bridge, 1.4 km E Mission San Juan Capistrano. 27 Comment
  RSA731907  Polygonum lapathifolium Fred M. Roberts, Sandy Leatherman 2007-11-27 6672 Orange Yorba Linda: Santa Ana Canyon, Santa Ana River wash, S of E La Palma Road near Via Lomas de Yorba Linda, about 0.6 km W Gypsum Cyn. bridge. 113 Comment
  RSA731931  Polygonum lapathifolium Fred M. Roberts, Sandy Leatherman 2007-11-27 6679 Orange Yorba Linda: drainage channel on east side of Amberdale Dr. c.a. 0.3km S Fairmont Blvd. 118 Comment
  RSA731946  Polygonum lapathifolium Fred M. Roberts, Sandy Leatherman 2007-11-27 6689 Orange Yorba Linda: drainage channel on east side of Amberdale Dr. c.a. 0.3km S Fairmont Blvd. 118 Comment
  RSA542468  Polygonum lapathifolium Fred M. Roberts, Gordon A. Marsh 1987-8-31 3588 Orange Santa Ana River: adjacent to Santa Ana, 0.6km S Edinger bridge. 14 Comment
  CAS-BOT-BC109243  Polygonum paronychia Robert Robertson 1954-5-1 120 San Mateo Pebble Beach. 4 Comment
  IRVC20354  Polypodium californicum Fred M. Roberts 1983-3-10 880 Orange Dana Point headlands: south of old cove road on cliff at west margin of Dana Point Harbor; 0.8km s of Richard Henry Dana School. Southern Coastal 50 Comment
  IRVC22502  Polypodium californicum Fred M. Roberts 1985-5-1 1692 Orange Aliso Canyon, 2.1km NNE Aliso Peak, Aliso Viejo 67 Comment
  RSA699746  Polypodium californicum Fred M. Roberts, D. E. Bramlet 2003-5-15 5873 Orange Rancho Mission Viejo; Donna O Neill Land Conservancy Cristianitos Cyn, 1.41 km SSW Gato Gate and 0.35 km NNW of SDG&E substation. 122 Comment
  RSA747625  Polypodium californicum Fred M. Roberts 2008-4-16 6907 Orange Dana Point: Dana Point Headlands, CNLM Preserve, 0.8km W Marine Institute, Dana Point Harbor. 45 Comment
  SBBG54791  Polypodium californicum D. Roberts 1981-3-25 Santa Barbara ca. 0.5 km E of East pine forest; 1.1 km SE of Chinese Harbor Comment
  UCR128553  Polypodium californicum Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5815 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.5 mi. WSW of peak 2242, south of peak 1517 396 Comment
  UCR209348  Polypodium californicum Fred M. Roberts 2008-4-14 6890 Orange Santa Ana Mountains, Upper Weir Canyon, east fork, 3.4 km eat of Robbers Peak, Irvine Ranch Conservancy 433 Comment
  UCSB47608  Polypodium californicum Roberts, Fred 1980-5-3 Orange Santa Ana Mtns., San Juan Cayon near mouth of Viejo Canyo, below Rte. 74, 2.5km by road ENE San Juan Guard Station, 0.5km WSW Bm 1100 288 Comment
  IRVC21306  Polypodium californicum Fred M. Roberts 1984-1-29 1160 Orange Laguna Niguel: Niguel Hill, 1.1km ENE of Aliso Peak, 2.0km SW of Alicia Fire Station. Southern Coastal 260 Comment
  UCSB36137  Polypodium californicum Roberts, Dar 1980-2-2 Santa Barbara 4.2 mi from 101 junction on Refugion Rd, Santa Ynez Mtns. 200 Comment
  UCSB38444  Polypodium californicum Roberts, Dar 1981-3-25 Santa Barbara About 0.5km east of East Pine Forest; 1.1km southeast of Chinese Harbor,Santa Cruz Island 366 Comment
  POM906  Polypodium hesperium G. Ross Robertson 1906-08 s.n. San Bernardino ''Dobbs Camp'' on Vivian Creek, on trail to Greyback Mt.. San Bernardino Mountains 2225 Comment
  IRVC23141  Polypogon interruptus Fred M. Roberts 1985-7-10 2006 Orange Capistrano Beach: San Juan Creek, 0.5km from the ocean, 0.2km N of Pacific Coast Highway. southern coastal 2 Comment
  IRVC22900  Polypogon monspeliensis Fred M. Roberts 1985-6-12 1903 Orange Laguna Niguel: Alicia Pkwy, 2.1km by road SW La Paz Rd., 1.0km W Sulphur Creek Reservoir. Southern Coastal 67 Comment
  IRVC25048  Polypogon monspeliensis Fred M. Roberts 1986-8-21 3062 Orange Mission Viejo: English Canyon along English Creek just below Trabuco Road crossing, about 2.4km E El Toro Fire Station. southern coastal 166 Comment
  RSA0058185  Polypogon monspeliensis Fred M. Roberts 2014-4-21 7871 Orange South Coast: San Joaquin Hills: Upper Laguna Lake 1 (upper Laguna Lake), north basin. 113 Comment
  RSA708227  Polypogon monspeliensis Fred M. Roberts, Robert L. Allen, Chris Barnhill, Carol A. Roberts 2005-4-10 6166 Orange Costa Mesa: Fairview Park, west of north end of Canyon Drive, c.a. 0.2km WNW Marison Special Education Center (Canyon Sch. on topos). 24 Comment
  UCSB36120  Polypogon monspeliensis Roberts, Dar 1980-5-4 Orange North end of Camino Capistrano Rd., 2nd telephone pole from the end (near the sewage treatment plant) 30 Comment
  RSA747709  Polypogon viridis Fred M. Roberts 2008-5-16 6987 Orange Dana Point: Dana Point Hradland, CNLM Preserve, north of Marguerita Drive, 0.5 km WNW Marine Institute, Dana Point Harbor. 75 Comment
  UCSB36134  Polypogon viridis Roberts, Dar 1980-5-31 Ventura 1/2 mile E. Ozena Campground 1220 Comment
  IRVC25447  Polystichum imbricans subsp. curtum Fred M. Roberts, K. G. Marsh 1987-5-14 3439 Orange Santa Ana Mtns: Upper Trabuco Canyon, Trabuco Canyon Trail, 1.3km NE Los Pinos Peak. Peninsular Ranges 1231 Comment
  RSA542522  Polystichum imbricans subsp. curtum Fred M. Roberts, R. E. Riefner 1988-7-19 4121 Orange Santa Ana Mtns: Modjeska Peak, W slope, along old abandoned road, 0.2 km W summit. 1592 Comment
  RSA679095  Polystichum imbricans subsp. curtum Fred M. Roberts 2003-6-25 5950 Orange Santiago peak, north slopes along ridge east of Main Divide truck trail, 0.6km NNW summit. 1605 Comment
  UCSB47640  Polystichum imbricans subsp. curtum Roberts, Fred 1980-5-3 Santa Barbara Main divide Truck Trail, on E side of road, 0.4km W Trabuco Peak, Santa Ana Mtns. 408 Comment
  CAS-BOT-BC72488  Polystichum scopulinum Mrs. Geo. Robertson 1906-7-1 s.n. San Bernardino Snow Canyon Comment
  POM812  Polystichum scopulinum G. Ross Robertson 1906-08 s.n. San Bernardino San Bernardino Mountains: Fern Canyon branch Mill Creek in South Mountain, 2286 Comment
  UCR215294  Populus fremontii subsp. fremontii Fred M. Roberts 2008-5-20 6991 Orange Lomas de Santiago, Santiago Creek wash north of Hangman Tree Road near confluence of Pancho Canyon, 1.6 km NW of Bolero Lookout. Irvine Ranch Conservancy. 349 Comment
  UCSB48128  Populus fremontii subsp. fremontii Roberts, Fred 1981-4-12 Orange Santa Ana Mountains: San Juan Canyon, Hwy 74, 1.3km by road E San Juan Guard Station; 0.9km SE Juan Rancho Survey Mark 89 Comment
  RSA650675  Populus fremontii var. fremontii Jeni L. Roberts 1991-5-5 18 San Bernardino Within Victorville City Limits. 2.5 miles N/W of I-15 on National Trails Highway. Comment
  RSA588882  Porophyllum gracile Fred M. Roberts, D. Bontrager 1990-6-5 4673 Orange Rancho Mission Viejo: Uper Gabino Canyon, near Orange County line, 3.9 kilometers E Point Ranch Survey Marker. 280 Comment
  CAS-BOT-BC141935  Potentilla anserina subsp. pacifica Robert Robertson 1954-4-17 85 San Mateo By stream near coast north of Moss Beach (Montara) 4 Comment
  SEINET6637675  Potentilla gracilis var. fastigiata J. Robertson, Y. Robertson 1979-7-18 s.n. Mono Sweetwater Mountains, north fork Sweetwater Creek 2804 Comment
  RSA0127595  Primula clevelandii var. clevelandii Fred M. Roberts 2016-3-17 8025 Orange San Joaquin Hills: City of Irvine, Ridge between Coyote Canyon and Bommer Canyon along Turtle Ridge Trail, 0.6 km NNE Signal Peak and 1.1 km SW Cattle Camp. 314 Comment
  RSA542402  Prunus ilicifolia Fred M. Roberts Jr., Carol A. Williams 1988-3-8 3826 Orange San Juan Canyon, Hwy 74, 1.2 km SSW Lower San Juan Picnic Ground. 378 Comment
  UCD113501  Prunus ilicifolia Warren Roberts 1973-9-20 s.n. Santa Barbara Santa Cruz Island. 0.4 mile west of summit of Picacho del Diablo. Comment
  UCR128381  Prunus ilicifolia Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5735 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  SD235012  Prunus ilicifolia subsp. ilicifolia Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5735 San Diego Peninsular Range, San Ysidro Mountains: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed )Otay Mountain 7.5' Q) 167 Comment
  UCSB38446  Prunus ilicifolia subsp. lyonii Roberts, Dar; Kiehn, David 1981-3-25 Santa Barbara Los Pinos del Sur. Santa Cruz Island. 274 Comment
  UCSB53667  Psathyrotes annua Roberts, Dar 1984-4-28 Mono Fish Slough; a desert wetland system 4.5 mi. north of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis; 2.7 miles S of Rocked-in-Spring on E side of slough at BLM Spring 1341 Comment
  SD192367  Pseudognaphalium beneolens Fred Roberts, Carol A. Roberts 2006-10-15 6446 San Diego Miramar Marine Corps Air Station: Rose Cyn., south of Miramar Way between Schilt Rd. and Obregon Ave. 135 Comment
  RSA684306  Pseudognaphalium biolettii Fred M. Roberts 2003-3-13 5589 Orange Donna O'Neill Land Conservancy: Ridge west of Christianitos Canyon, 1,320m NW Sycamore Gate and 880m W Cristianitos Rd. 179 Comment
  RSA747633  Pseudognaphalium biolettii Fred M. Roberts 2008-5-16 6980 Orange Dana Point: Dana Point Headlands, CNLM Preserve, along north slopes above Dana Strand Beach, 0.8km WNW Marine Institute, Dana Point Harbor. 45 Comment
  RSA0126623  Pseudognaphalium californicum Fred M. Roberts 2012-4-24 7506 Orange San Joaquin Hills: Buck Gully, W of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km W Signal Peak. 179 Comment
  UCR239639  Pseudognaphalium californicum Fred M. Roberts 2012-4-24 7506 Orange San Joaquin Hills, Buck Gully, west of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km west of Signal Peak 179 Comment
  RSA0089199  Pseudognaphalium luteoalbum Fred M. Roberts 2014-4-21 7856 Orange South Coast: San Joaquin Hills: Upper Laguna Lake 1 (upper Laguna Lake), north basin. 113 Comment
  SEINET5710238  Pseudognaphalium luteoalbum Warren Roberts 1963-1 s.n. Monterey Roberts Valley Ranch, 4 miles north of Carmel Valley.; Carmel Valley 625 Comment
  UCSB48012  Pseudognaphalium microcephalum Roberts, Jr., Fred 1980-9-14 Orange Santa Ana Mtns.; San Juan Canyon, 0.6 km. SW Lower San Juan Picnic Ground; 1.9 km. WNW Sitton Peak 410 Comment
  CAS-BOT-BC361472  Pseudognaphalium stramineum Robert Robertson 1954-5-8 131 Monterey E. of Carmel Cove, Point Lobos 15 Comment
  UCR215313  Pseudognaphalium stramineum Fred M. Roberts 2008-3-27 6804 Orange South Coast, Dana Point; Dana Point Headlands, Center for Natural Lands Mgmt. Preserve, 0.8 km west Marine Institute, Dana Point Harbor 75 Comment
  IRVC20774  Pseudotsuga macrocarpa Fred M. Roberts 1980-5-3 63 Orange Main Divide Truck Trail, 0.4km W Trabuco Peak. Santa Ana Mountains 1341 Comment
  RSA716772  Pseudotsuga macrocarpa Fred M. Roberts, Michelle Balk, Robert Allen, Megan Enright 2004-7-18 6256 Orange Santa Ana Mtns.: Upper Trabuco Cyn. along Trabuco Cyn. Trail, 1.3km NE Los Pinos Pk. and c.a. 0.25km by trail from Main Divide Truck Trail. 1245 Comment
  UCSB47639  Pseudotsuga macrocarpa Roberts, Fred 1980-5-3 Orange Main Divide Truck Trail, on east side of road, 0.4 km. W Trabuco peak, Santa Ana Mtns. 1341 Comment
  UCR114955  Psilocarphus brevissimus var. brevissimus Fred M. Roberts 1992-4-25 4867 Riverside San Jacinto Valley, Upper Salt Creek Watershed adjacent to Hemet, NW corner of California Avenue and Stowe Road, 3.3km ENE Winchester 455 Comment
  RSA795555  Psilocarphus tenellus D. Roberts, W. R. Ferren, F. Roberts 1983-4-16 LP- 367 Santa Barbara Roadside margins 425 m west of junction of service roads at southeast corner of mesa, west side of park. La Purisima Mission State Historic Park, 2 km NE of Lompoc City Limit. Comment
  RSA588710  Psilocarphus tenellus Fred M. Roberts 1990-5-22 4640 Orange Santa Ana Mountains; Upper Hot Springs canyon, just west of Falcon Group Camp, 1.9km ESE Los Pinos Peak. 994 Comment
  RSA649967  Psorothamnus arborescens var. arborescens Jeni L. Roberts 1991-5-5 27 San Bernardino Within Victorville City Limits. 2.5 miles N/W of I-15 on National Trails Highway. Comment
  RSA588892  Pteridium aquilinum var. pubescens Fred M. Roberts 1990-6-4 4662 Orange Santa Ana Mts. Hall Canyon, 1.8 km NNW Mustand Spring at east edge of flying B Ranch. 421 Comment
  RSA678493  Pterostegia drymarioides Fred M. Roberts, Robert L. Allen, Carol Roberts 2003-5-11 5850 Orange Dana Point Headlands: 0.8km SSW Richard Henry Dana School north of Marguerita Drive. 76 Comment
  RSA737547  Pterostegia drymarioides Fred M. Roberts 2008-3-12 6714 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, c.a. 0.8 km W Marine Institute (Dana Point Harbor). 50 Comment
  SD233345  Pterostegia drymarioides Fred M. Roberts 2008-3-12 6714 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, ca. 0.8 km W Marine Institute (Dana Point Harbor). 49 Comment
  SD233909  Pterostegia drymarioides Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5728 San Diego Peninsular Range, San Ysidro Mountains: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed (Otay Mtn. 7.5' Q) 167 Comment
  RSA542463  Pterostegia drymarioides Fred M. Roberts 1987-3-27 3279 Orange Canada De Los Alisos: above Canada Rd., 4.5 km NNE El Toro Fire Station. 226 Comment
  UCSB40762  Pterostegia drymarioides Roberts, Dar; Fletcher, Martin 1981-3-23 Santa Barbara 1 km. north of Field Station, Santa Cruz Island. 213 Comment
  UCSB40766  Pterostegia drymarioides Roberts, Fred 1981-3-24 Santa Barbara Frazer Point, Santa Cruz Island 7 Comment
  IRVC25158  Pulicaria paludosa Fred M. Roberts 1986-9-3 3127 Orange adjacent to Anaheim, between Yorba Linda Regional Park and Imperial Hwy, Santa Ana River 88 Comment
  RSA679099  Pulicaria paludosa Fred M. Roberts 2003-7-24 5964 ` Orange San Juan Capistrono: San Juan Creek, c.a. 0.1 km NE La Novia Bridge. Along creek on cobbly sand of wash in open southern willow scrub and mulefat scrub. 27 Comment
  RSA718967  Pulicaria paludosa Fred M. Roberts, Robert L. Allen 2006-10-8 6413 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 0.3km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  RSA0041475  Pulicaria paludosa Fred M. Roberts, Robert L. Allen 1985-8-19 2163 Orange Mission Viejo: English Creek near confluence of Aliso Creek, 1.1km E E1 Toro Fire Station. 138 Comment
  UC1597259  Quercus Fred M. Roberts Jr. and Carol A. Roberts 1989-4-7 4264 Orange 0.4 km w West Moulton Peak; Aliso-Wood Canyon Regional Park, Upper Wood Canyon 104 Comment
  UCSB52413  Quercus X acutidens Roberts, Fred 1981-11-15 Orange Santa Ana Mtns.: San Juan Canyon, Hwy 74, across road from entrance to Lower San Juan Picnic Ground 436 Comment
  RSA716101  Quercus X kinseliae Fred M. Roberts, Dar Roberts, Marianne Wampler, Carol Roberts 1994-10-2 4922 Santa Barbara Santa Barbara: Rattlesnake Cyn., along Las Canaos Road at Skofield Park. 258 Comment
  UCD46921  Quercus X macdonaldii Warren Roberts; Dick Hildreth and Karl Raven 1973-9-19 SCI73 20 Los Angeles Santa Cruz Island. Comment
  IRVC20824  Quercus agrifolia var. agrifolia Fred M. Roberts 1982-7-25 784 Orange South Laguna; Niguel Hill, canyon on S flank; 0.9km ESE Aliso Peak; 1.1km NNW Bench Mark 133 Southern Coastal 195 Comment
  IRVC22517  Quercus agrifolia var. agrifolia Fred M. Roberts 1985-4-30 1677 Orange Laguna Beach: Temple Hill; at margin of "Dripping Springs Canyon"; 0.4km NNE Top of the World School. Southern Coastal 255 Comment
  RSA702202  Quercus agrifolia var. agrifolia Fred M. Roberts, David E. Bramlet 2003-6-20 5923 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, tributary to Christianitos Cyn, along Back Road, 1.48 km WNW Sycamore Gate. 189 Comment
  RSA725472  Quercus agrifolia var. agrifolia Fred M. Roberts, Megan Lulow 2007-7-30 6546 Orange Fremont Canyon, 1.3 km NE Irvine Lake spillway, North Irvine Ranch Policy Area. 253 Comment
  SD233976  Quercus agrifolia var. agrifolia Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5730 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed. Canyon bottom along stream course. 167 Comment
  UCSB48077  Quercus agrifolia var. agrifolia Roberts, Fred 1981-4-11 Orange Santa Ana Mtns., San Juan Canyon, Hwy 74, 2.7km ENE San Juan Guard Station 96 Comment
  SD187977  Quercus agrifolia var. oxyadenia Laurie Roberts, Lane McClelland 2006-5-2 2 San Diego Descanso. Just N of I-8, ca. 1 1/3 mi E of its intersection with SR-79. 1098 Comment
  IRVC23334  Quercus berberidifolia Fred M. Roberts 1981-11-15 452 Orange San Juan Canyon; N-side of Hwy 74; 0.3km SW Lower San Juan Picnic Ground Santa Ana Mountains 423 Comment
  IRVC23335  Quercus berberidifolia Fred M. Roberts 1983-3-16 913 Orange Laguna Beach: Sycamore Hills, near El Toro Road, 1.2km NNE jct. El Toro and Laguna Canyon Roads; 5.4km ESE Signal Peak. Southern coastal 112 Comment
  IRVC24544  Quercus berberidifolia Fred M. Roberts, R. L. Allen 1985-8-19 2129 Orange Mission Viejo: lateral to Engilish Canyon along Vista de Lago Drive; 3.4km ENE El Toro Fire Station. Southern Coastal 218 Comment
  IRVC24545  Quercus berberidifolia Fred M. Roberts, R. L. Allen 1985-8-19 2138 Orange Mission Viejo: lateral to Engilish Canyon along Vista de Lago Drive; 3.4km ENE El Toro Fire Station. Southern Coastal 218 Comment
  IRVC24546  Quercus berberidifolia Fred M. Roberts, R. L. Allen 1985-8-19 2130 Orange Mission Viejo: lateral to Engilish Canyon along Vista de Lago Drive; 3.4km ENE El Toro Fire Station. Southern Coastal 218 Comment
  IRVC24551  Quercus berberidifolia Fred M. Roberts 1983-10-9 1141 Orange Laguna Beach: Temple Hill S of Upper Rancho Laguna Canyon near Del Mar Street. Southern Coastal 200 Comment
  RSA0013859  Quercus berberidifolia Fred M. Roberts 2012-5-10 7561 Orange San Joaquin Hills: Buck Gully, S Fork, north slope Pelican Hill, 0.6 km N summit Pelican Hill, north of Pelican Hill Drive. 183 Comment
  RSA590959  Quercus berberidifolia Fred M. Roberts, Karlin G. Marsh 1991-4-10 4765 Orange Laguna Beach: South Laguna, Temple Hill, ridge between upper Hobo Canyon and Aliso Gorge, 1.7 km NW Niguel Hill summit. 213 Comment
  UCR246514  Quercus berberidifolia Fred M. Roberts 2013-5-30 7779 Orange Lomas de Santiago, Santiago Creek Wash, at Santiago Canyon Road bridge, south side, 0.3 km west of the junction of Silverado and Santiago Canyon Roads 299 Comment
  UCR247908  Quercus berberidifolia Fred M. Roberts 2013-6-7 7783 Riverside Peninsular Ranges, SANTA ANA MTNS.: Tributary to Upper San Juan Canyon along Chiquito Basin Trail, 1.3 km NNW Upper San Juan Campground. 524 Comment
  IRVC28043  Quercus cedrosensis Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5744 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  SD140564  Quercus cedrosensis Fred Roberts, D. Kreager, Gail Kobetich 1996-8-15 4972 San Diego San Ysidro Mtns; southwestern flank in unnamed canyon along U.S.-Mexican border, 0.7 km east-northeast Border Monument 251, 4.2 km south-southwest Otay Mtn;. 334 Comment
  UCR128848  Quercus cedrosensis Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5744 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  IRVC22666  Quercus chrysolepis Fred M. Roberts 1985-5-9 1727 Orange Santa Ana Mountains: Upper McVicker Canyon, 1.8km NE Los Pinos Peak. Peninsular Ranges 1113 Comment
  JEPS37375  Quercus chrysolepis Rev. George Robertson 1903-11-26 62 San Bernardino Lytle Creek 1066 Comment
  UCD105628  Quercus chrysolepis Warren Roberts; Dick Hildreth, Karl Raven 1973-9-20 SCI73 28 Santa Barbara collected on north side of Picacho del Diablo, 100 ft from summit. Santa Cruz Island. Comment
  UCD45412  Quercus chrysolepis Warren Roberts; Dick Hildreth and Karl Raven 1973-9-20 SCI73 26 Santa Barbara 1 Tree. 100 ft. down from Quercus chrysolepis (SCI73-25B). Santa Cruz Island. Comment
  UCD45537  Quercus chrysolepis Warren Roberts; Dick Hildreth and Karl Raven 1973-9-20 SCI73 24 B Santa Barbara Collected on NW slope of Picacho del Diablo on volcanic rock. Santa Cruz Island. Comment
  IRVC22515  Quercus dumosa Fred M. Roberts, Karlin G. Marsh 1983-5-26 1094 Orange Dana Point Headlands: 0.5km W Dana Point Harbor; 0.8km SSW Richard Henry Dana School Southern Coastal 82 Comment
  IRVC24553  Quercus dumosa Fred M. Roberts, Gordon A. Marsh, Karlin G. Marsh 1988-4-26 3952 Orange San Joaquin Hills: Pelican Hill; E slope above Los Trancos Canyon; 0.4km ESE Pelican Hill survey mark; N-facing slope of sandstone ridge. Southern Coastal 200 Comment
  RSA743500  Quercus dumosa Fred M. Roberts 2008-9-10 7097 Orange Dana Point: Dana Point Headlands, CNLM Preserve, north of Marguerita Drive, 0.5 km WNW Marine Institute, Dana Point Harbor. 75 Comment
  SD135236  Quercus dumosa Fred M. Roberts 1992-12-27 4853 San Diego Carlsbad, Green Valley, Arroyo la Costa, along El Camino Real, ca. 2 km SSE of east end of Batiquitos Lagoon, on west-facing slope; 29 Comment
  SD135238  Quercus dumosa Fred Roberts 1992-10-20 4849 San Diego Carlsbad; east of Evan's Point, 0.6 km east-northeast Agua Survey Marker (on Evan's Point) 54 Comment
  SD135239  Quercus dumosa Fred M. Roberts 1992-10-20 4848 San Diego Carlsbad, south of & along Palomar Oaks Road, 3 km ESE of junction Palomar Airport Road & I-5, on north-facing slope; 52 Comment
  UCR129347  Quercus dumosa Fred M. Roberts, Karen Kirtland 1989-2-22 4183 Orange San Joaquin Hills, Pelican Hill, 0.4 km ESE of summit 189 Comment
  UCR182837  Quercus dumosa Fred M. Roberts 2007-4-6 6509 San Diego Southern Coast, Carlsbad, La Costa Greens Ecological Reserve, east side of El Camino Real c. 2 km south of Palomar Airport Rd. 79 Comment
  UCR241915  Quercus dumosa Fred M. Roberts 2012-5-10 7560 Orange Peninsular Ranges; Coastal Foothills, San Joaquin Hills, south fork of Buck Gully, north slope Pelican Hill, 0.6 km N summit Pelican Hill, north of Pelican Hill Drive 183 Comment
  UCSB52411  Quercus dumosa Roberts, Fred 1982-7-8 Orange LAGUNA NIGUEL: canyon near Pacific Island Dr., 1.4km ESE Aliso Peak: 1.1km NE Bench Mark 133 207 Comment
  UCSB52929  Quercus dumosa Roberts, Fred; Marsh, K. 1983-5-26 Orange Dana Point Headlands; north of Dana Strand Rd., 0.5 km. W Dana Point Harbor; 0.8 km. SSW Richard Henry Dana School 82 Comment
  JEPS37338  Quercus durata Rev. George Robertson 1903-11-26 67 San Bernardino Lytle Creek Old Baldy Mt. Comment
  SD196517  Quercus engelmannii Fred Roberts, Debra Kinsinger 2007-6-14 6526 San Diego Guatay, just east of Farley Flat, 150 m N of Old Hwy 80, 2.3 km ENE Guatay Pk. 1235 Comment
  SD233854  Quercus engelmannii Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5753 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed. 167 Comment
  UCR220086  Quercus engelmannii Fred M. Roberts 2010-5-17 7348 Los Angeles San Gabriel Mountains foothills, Monrovia, southeast corner of Hillcrest Blvd and north Ivy Ave 234 Comment
  UCSB52410  Quercus engelmannii Roberts, Fred 1982-7-8 Orange Laguna Niguel; canyon near Pacific Island Dr., 1.4 km. ESE Aliso Peak: 1.1 km. NE Bench Mark 133 207 Comment
  RSA0119675  Quercus parvula var. tamalpaisensis Fred M. Roberts 2016-1-10 7985 Marin Mount Tamalpais: North slope, International Trail, 0.13 km east of Ridgecrest Blvd and 0.5 km NNE summit of West Peak. 683 Comment
  RSA0119686  Quercus parvula var. tamalpaisensis Fred M. Roberts 2016-1-10 7983 Marin Mount Tamalpais: Panoramic Hwy., just west of Rattlesnake Creek and about 1.0 km NNE by air from Pan Toll Ranger Station. 396 Comment
  RSA679225  Quercus wislizeni var. frutescens Fred M. Roberts 2003-6-25 5946 Orange Santiago peak, north slopes along ridge east of Main Divide truck trail, 0.6km NNW summit. 1605 Comment
  RSA725579  Quercus wislizeni var. frutescens Fred M. Roberts, Robert L. Allen, Trish Smith 2007-6-15 6535 Orange Along dirt road on ridge between Fremont and Black Star Cyns., 5.2km ENE Irvine Lake Spillway and 1.7km W Hidden Ranch. 739 Comment
  CAS-BOT-BC379080  Ranunculus aquatilis var. diffusus Robert Robertson 1954-5-17 161 Santa Clara at SW end of Lake Lagunita, Stanford University 37 Comment
  RSA542414  Ranunculus californicus Fred M. Roberts 1987-4-3 3347 Orange Irvine: San Joaquin Hills, Central Shadey Canyon, 2.8 kilometers NE Signal Peak. 109 Comment
  UCSB36141  Ranunculus californicus Roberts, Dar 1980-3-7 San Luis Obispo 1.5 miles N.W. campus Cal Poly S.L.O., in Polly Canyon 140 Comment
  UCSB39664  Ranunculus californicus Roberts, Fred; Forbes, Holly 1982-2-13 Santa Barbara 0.5 miles west of road along ridge on north side, Point Sal State Beach. 335 Comment
  RSA542415  Ranunculus hebecarpus Fred M. Roberts, Karlin G. Marsh 1987-5-14 3447 Orange Upper Trabuco Canyon, Trabuco Canyon Trail, 2 km NNW Los Pinos Peak 856 Comment
  HSC18111  Ranunculus repens var. repens S. J. Roberts 1965-4-8 9 Humboldt 2 mi. E of Mad River Park Comment
  RSA703880  Raphanus sativus Fred M. Roberts, D. E. Bramlet 2004-4-21 6043 Orange Rancho Mission Viejo: Donna O Neill Land Conservancy. Along Back Road in upper Shady Canyon, 1.74km NW Sycamore Gate, 1.23km W of Cristianitos Road. 180 Comment
  SD164512 Image available Rapistrum rugosum Fred M. Roberts 2003-5-14 5866 San Diego San Marcos: lot east of Pacific Road and north of San Marcos Blvd., San Marcos. Adjacent to vernal pool-like depression in non-native forb/annual grassland. 157 Comment
  UCR241912  Rhamnus ilicifolia Fred M. Roberts 2012-5-10 7562 Orange Peninsular Ranges; Coastal Foothills, San Joaquin Hills, south fork of Buck Gully, north slope Pelican Hill, 0.6 km N summit Pelican Hill, north of Pelican Hill Drive 183 Comment
  RSA743467  Rhaphiolepis indica Fred M. Roberts, Carol A. Roberts 2008-9-28 7116 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 65 Comment
  RSA0073655  Rhus integrifolia Fred M. Roberts 2010-3-12 7184 Orange Southeast Coast: Dana Point Headlands: Harbor Point Park, South of Green Lantern and west of Dana Point Harbor, c.a. 150 meters SE Interpretive Center. 50 Comment
  SD192168  Rhus integrifolia Fred Roberts 2006-7-6 6352 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  SD192169  Rhus integrifolia Fred Roberts, Carol A. Roberts 2006-10-15 6450 San Diego Miramar Marine Corps Air Station: Rose Cyn., along west side of Schilt Rd. between Miramar Way and the Flightline. 135 Comment
  SJSU10863  Rhus integrifolia F. D. Robertson 1956-3-13 Santa Clara above Penitencia Creek, Alum Rock Park, E San Jose foothills Comment
  UCR267191  Rhus integrifolia Fred M. Roberts 2010-3-12 7184 Orange Southeast Coast, DANA POINT HEADLANDS: Harbor Point Park, South of Green Lantern and west of Dana Point Harbor, c. 150 meters SE Interpretive Center 50 Comment
  RSA0041474  Rhus integrifolia Fred M. Roberts, R. L. Allen 1985-8-19 2143 Orange Mission Viejo: ridge, 3.5km ENE E1 Toro Fire Station. 279 Comment
  RSA731004  Rhus ovata Fred M. Roberts, B. Allen, D. Olsen 2007-1-19 6506 Orange Beek s Place along Main Divide Rd., 4.1 km NW Pleasant Peak. Abandoned homestead with persistant conifer plantings, some species spreading into surrounding chaparral. 852 Comment
  UCSB47593  Rhus ovata Roberts, Fred 1980-4-5 Orange Highway 74, San Juan Canyon, 0.4 km. SW Lower San Juan Picnic Ground, Santa Ana Mountains 390 Comment
  RSA542519  Rhus trilobata var. quinata Fred M. Roberts, G. A. Marsh 1986-8-27 3108 Orange Santa Ana Mountains: Santiago Peak, Main Divide Truck Trail, 0.1km WNW Summit. 1620 Comment
  IRVC28475  Rhynchelytrum repens Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5809 San Diego Otay Mtn; head of cyn 2 miles NW of Otay Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 470 Comment
  RSA679096  Ribes amarum Fred M. Roberts 2003-6-25 5951 Orange Santa Ana Mountains: Mojeska Peak in Upper Cold Springs Cyn., north of Main divide Truck Trail, 0.4 km ESE summit. 1471 Comment
Read comments
Jan 3 2007
  UCSB36136  Ribes amarum Roberts, Dar 1980-2-2 Santa Barbara 3.2 miles on Refugio Rd from 101 junc; Santa Ynez Mts 45 Comment
  UCSB34463  Ribes amarum Roberts, Fred 1980-2-2 Santa Barbara On west side of Refugio Rd; 3.5km north of Highway 101; Sant Ynez Mtns 45 Comment
  UCSB48367  Ribes indecorum Roberts, Fred 1982-4-18 Orange SANTA ANA MTNS; Hot Springs Canyon; 0.8km SW Falcon Group Camp 306 Comment
  RSA0029942  Ribes malvaceum var. malvaceum Fred M. Roberts, Sandy Leatherman 2013-2-13 7722 Orange Santa Ana Mountains: Ridge south of central Santiago Canyon, near Joplin Trail, 3.7 km SE Modjeska (town). 800 Comment
  UCR246519  Ribes malvaceum var. malvaceum Fred M. Roberts, Sandra L. Leatherman 2013-2-13 7722 Orange Santa Ana Mountains, ridge south of central Santiago Canyon, near Joplin Trail, 3.7 km southeast of the town of Modjeska 800 Comment
  UCSB36162  Ribes malvaceum var. malvaceum Roberts, Dar 1980-2-2 Santa Barbara 3.5 miles on Refugio Rd; from 101 junc; Santa Ynez Mts 170 Comment
  UCSB47637  Ribes malvaceum var. viridifolium Roberts, Fred 1980-5-3 Orange Main Divide Truck Trail; 0.2km west of Trabuco Peak; Santa Ana Mtns 1347 Comment
  UCSB52466  Ribes malvaceum var. viridifolium Roberts, Fred; Steele, K. 1982-12-26 Orange South Laguna: Niguel Hill; near end of Sea Island Dr; 1.9km SE Aliso Peak; 1.2km E Bench Mark 133 210 Comment
  UCR209336  Ribes roezlii Fred M. Roberts, Robt. L. Allen 2008-6-23 7055 Riverside Santa Ana Mountains, Santiago Peak, north slope, Main Divide Truck Trail, 0.4 km north-northeast of summit 1639 Comment
  RSA749353  Ricinus communis Fred M. Roberts 2008-4-15 6902 Orange Lomas de Santiago: Loma Ridge, Lower Hicks Cyn., east ridge, Conservation Trail, 1.6 km ESE Rattlesnake Reservoir dam and 2.7 km WSW Bee Peak, Irvine Ranch Conservancy. 172 Comment
  IRVC25524  Robinia pseudoacacia Fred M. Roberts 1987-11-17 3755 Orange Serrano Creek, near Trabuco Road west of Canada Road, 2.5km NNE El Toro Fire Station, Lake Forest 146 Comment
  RSA0014061  Romneya coulteri Fred M. Roberts 2008-5-30 7018 Orange Lomas de Santiago: Santiago Creek wash, south of Irvine Mesa, 1.5 km SE Silverado Sch., Irvine Ranch Conservancy. 326 Comment
  RSA0050276  Romneya coulteri Fred M. Roberts 2013-6-12 7799 Orange Peninsular Ranges SANTA ANA MTNS.: Lower Silverado Canyon along Silverado Creek on north side of Silverado Canyon Road,, 0.9 km ENE Silverado School and 1.7 km up stream Black Star Road crossing. 332 Comment
  RSA548867  Romneya coulteri Fred M. Roberts, Carol A. Roberts 1988-6-2 4028 Orange Santa Ana Mountains: Silverado Canyon. Maple Springs Truck trail. 4.3 km above gate, 1.0 km WSW Bald Peak. 817 Comment
  UCR247896  Romneya coulteri Fred M. Roberts 2013-6-12 7799 Orange Peninsular Ranges, SANTA ANA MTNS.: Lower Silverado Canyon along Silverado Creek on north side of Silverado Canyon Road, 0.9 km ENE Silverado School and 1.7 km up stream Black Star Road crossing. 332 Comment
  IRVC27988  Romneya trichocalyx Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5719 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  RSA0014062  Romneya trichocalyx Fred M. Roberts 2008-5-30 7017 Orange Lomas de Santiago: Santiago Creek wash, south of Irvine Mesa, 1.5 km SE Silverado Sch., Irvine Ranch Conservancy. 326 Comment
  SD233898  Romneya trichocalyx Fred M. Roberts, A. Pigniolo, K. Muri 2003-5-3 5719 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River 167 Comment
  UCR128414  Romneya trichocalyx Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5719 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  UCSB53309  Rorippa palustris Roberts, Dar 1983-7-23 Inyo Fish Slough: 4.5 mi. north of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis; 1 mi. N of jct. of Fish Slough Rd. and Jean Blanc Rd. at barrier separating slough from Owens River Canal 1341 Comment
  RSA727336  Rorippa palustris subsp. occidentalis Fred M. Roberts, Sandra Leatherman 2007-9-19 6587 Riverside Santa Ana Canyon: Santa Ana River, across from Green River Golf Course, 0.15 km W Green River Road Bridge. 128 Comment
  UCR188895  Rorippa palustris subsp. occidentalis Fred M. Roberts, S. Leatherman 2007-9-19 6587 Riverside Santa Ana Canyon, Santa Ana River, across from Green River Golf Course, 0.15 km W of Green River Road bridge 128 Comment
  RSA550606  Rosa californica Fred M. Roberts 1989-4-26 4324 Orange Lower Blind Canyon near mouth, 9.2 km SW Sierra Peak, 1.0 km N Irvine Lake spillway. 207 Comment
  RSA795548  Rostraria cristata D. Roberts 1983-5-5 LP- 407 Santa Barbara 65 m SSW of staff residences. La Purisima Mission State Historic Park: 2 km northeast of Lompoc City Limit. Comment
  SEINET5735590 Image available Rubus parviflorus Ed Roberts 1964-1 36 Mendocino Along Indian Creek, ca. 0.25 mi. S of Philo.; Philo Comment
  UCSB34449  Rubus ursinus Roberts, Fred 1980-2-2 Santa Barbara East side of Refugio Road, 3.5 km north of Highway 101, Santa Ynez Mtns. 45 Comment
  UCSB52860  Rubus ursinus Roberts, Fred; Marsh, K. 1984-4-21 Orange Santa Ana Mtns.: Lost Women Canyon, 2.3km WSW Bald Peak; 2.3km SE Bedford Peak 222 Comment
  CAS-BOT-BC421998  Rumex acetosella Robert Robertson 1954-5-8 135 Monterey E. of Carmel Cove, Point Lobos. 15 Comment
  UCR114965  Rumex crispus Fred M. Roberts 1992-4-25 4866 Riverside San Jacinto Valley, Upper Salt Creek Watershed adjacent to Hemet, NW corner of California Avenue and Stowe Road, 3.3km ENE Winchester 455 Comment
  UCR258356  Rumex crispus Fred M. Roberts 2014-4-21 7858 Orange South Coast, SAN JOAQUIN HILLS: Upper Laguna Canyon, Laguna Lake 1 (Upper Laguna Lake), north basin, c. 5.1 km ENE summit Signal Hill. Laguna Coast Wilderness Park 113 Comment
  UCSB34472  Rumex crispus Roberts, Fred 1980-6-7 Santa Barbara Lot at comer of Stork and Hollister Roads, Goleta. 12 Comment
  RSA730995  Rumex maritimus Fred M. Roberts 2006-11-15 6469 Orange Santa Ana Cyn., Santa Ana River, north bank, 1.1 km ENE Imperial Hwy crossing. 85 Comment
  UCR211729  Rumex pulcher Fred M. Roberts, D. E. Bramlet 2005-5-5 6181 Riverside Perris Basin, San Jacinto Valley, along MWD canal just north of Devonshire Road and west of Warren Road 458 Comment
  RSA610241  Rumex salicifolius Fred M. Roberts, Tony Bomkamp 1997-3-13 4984 Orange Rancho Mission Viejo: Christianitos Canyon near confluence of Gabino Canyon, 5.1km NE Clemente Survey Mark. 85 Comment
  IRVC24801  Rupertia physodes Fred M. Roberts, G. A. Marsh 1986-5-16 2909 Orange Ridge above San Juan Canyon, Sitton Peak Truck Trail, 4.0km W Sitton Peak, Santa Ana Mountains 670 Comment
  RSA0047137  Rytidosperma caespitosum Fred M. Roberts 2005-3-29 6136 San Diego San Diego: near Fairbanks Ranch, ridge south of Lusardi Creek, c.a. 0.2km north San Dieguito Rd. and 1.3km NE Fairbanks Lake. 83 Comment
  SD163606 Image available Rytidosperma caespitosum Fred M. Roberts 2005-3-29 6136 San Diego San Diego: near Fairbanks Ranch, ridge south of Lusardi Creek, ca. 0.2km north of San Dieguito Rd. and 1.3km NE Fairbanks Lake, UTM Z11S 04 84 468mE, 36 51 734mN. 82 Comment
  RSA649969  Salazaria mexicana Jeni L. Roberts 1991-5-5 17 San Bernardino Within Apple Valley city Limits. (3 mile)? NE of I15 on Highway 18, .5 mile east of the Mojave River. Comment
  UCSB48045  Salicornia pacifica Roberts, Jr., Fred 1981-6-26 Orange Anaheim Bay; Calif. Rte. 1 at southern margin of Naval Weapons Station, 1.7 km. SE McGaugh School; 1.1 km. W Hog Island Comment
  RSA0042767  Salix exigua Fred M. Roberts 2012-7-18 7675 Orange SAN JOAQUIN HILLS: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus of Poppy Street and 2.1 km WNW summit of Pelican Hill. 37 Comment
  RSA489712  Salix exigua Dar A. Roberts, H. C. Forbes 1984-4-28 FS- 263 Inyo 2.5 miles N on Fish Slough Rd from jct with Jean Blanc Rd. Yellow Willow Dam. (and Mono Co.) Fish Slough: a desert wetland system 4.5 miles N of Bishop at the northern end of Owens Valley; study site includes 14 sq. miles along a 7 mile drainage axis. 1274 Comment
  RSA539365  Salix exigua Fred M. Roberts Jr., Karlin G. Marsh 1989-3-14 4201 Orange San Juan Canyon, Lower San Juan Picnic Ground. 329 Comment
  RSA542353  Salix exigua Fred M. Roberts Jr., Gordon Marsh 1987-8-31 3602 Orange Santa Ana River: adjacent to Santa Ana, 0.5 km NE 17th St. bridge. 27 Comment
  RSA542512  Salix exigua Fred M. Roberts Jr. 1987-4-21 3389 Orange Aliso Viejo: Aliso Creek, along bike trail near confluence of Aliso Creek, 3.3 km ENE Moulton Peak 67 Comment
  RSA679089  Salix exigua Fred M. Roberts 2003-7-24 5970 Orange San Juan Capistrono: San Juan Creek, c.a. 0.1 km NE La Novia Bridge. Along creek on cobbly sand of wash in open southern willow scrub and mulefat scrub. 27 Comment
  RSA703731  Salix exigua Fred M. Roberts, David E. Bramlet 2004-7-30 6091 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn. along Cristianitos Ck., 1.1 km SSW Gato Gate and 0.32km W Cristianitos Road. 73 Comment
  RSA587881  Salix gooddingii Fred M. Roberts 1990-5-8 4618 Orange Chino Hills: Soquel Canyon, c.a. 1.2 km NNW Gilman Peak. Comment
  UCR258627  Salix gooddingii Fred M. Roberts 2014-4-21 7855 Orange South Coast, SAN JOAQUIN HILLS: Laguna Lake 1 (Upper Laguna Lake), south basin 113 Comment
  RSA0126624  Salix lasiolepis Fred M. Roberts 2012-4-24 7507 Orange San Joaquin Hills: Buck Gully, W of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km W Signal Peak. 179 Comment
  RSA542509  Salix lasiolepis Fred M. Roberts Jr., W. R. Ferren 1987-4-8 3357 Orange Newport Beach: Upper Newport Back Bay, west side, North Star Beach, 0.8 km N Coney Island. 0 Comment
  RSA725509  Salix lasiolepis var. lasiolepis Fred M. Roberts 2007-9-11 6565 Orange Aliso Viejo: tributary to Aliso Creek on west side of Moulton Pkwy., 0.2 km N Aliso Viejo Pkwy., adj. to Kinder Care Learning Center. 83 Comment
  SEINET4174109  Salsola paulsenii J. Robertson 1974-6-25 s.n. Mono 2 mi. east of Benton California on dum road 1792 Comment
  IRVC23287  Salsola tragus Fred M. Roberts 1985-7-18 2055 Orange Temple Hill, Goff Ridge, 0.9km NE Goff Island off Nye Place Laguna Beach 168 Comment
  IRVC28458  Salvia apiana Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5757 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  RSA542479  Salvia apiana Fred M. Roberts 1988-5-13 3972 Orange Lomas de Santiago: Loma Ridge, Upper Limestone Canyon near spring, 2.3 km NW Bolero Lookout. 439 Comment
  RSA542480  Salvia apiana Fred M. Roberts, G. A. Marsh, K. G. Marsh 1988-4-26 3941 Orange San Joaquin Hills: Pelican Hill, 0.5km SE summit. 165 Comment
  RSA584710  Salvia apiana Fred M. Roberts 1989-6-7 4378 Orange Santa Ana Mountains: Upper Gypsum Canyon along ridge between Gypsum and Blind Canyon, c. 6.3 km WSW Sierra Peak. 411 Comment
  SD247197  Salvia apiana Jim Roberts 2013-4-29 7 San Diego City of San Diego; Tecolote Canyon Natural Park; vicinity of 230 yards SE of junction September Street and Burgener Blvd. 57 Comment
  UCSB47996  Salvia apiana Roberts, Fred 1980-6-29 Orange Santa Ana Mtns; Viejo Canyon; 0.4 km N Calif. Rte 74; 2.2 km ENE San Juan Guard Station 341 Comment
  SBBG71171  Salvia carnosa G. Robertson 1900-8-18 Unknown Mt Pancake Mansa River, San Pedro Martir 1584 Comment
  RSA752032  Salvia columbariae Fred M. Roberts, Eliza Maher 2008-3-26 6795 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 65 Comment
  RSA649970  Salvia dorrii subsp. dorrii Jeni L. Roberts 1991-5-3 14 San Bernardino Within Apple Valley city Limits. (3 mile)? NE of I15 on Highway 18, .5 mile east of the Mojave River. Comment
  RSA0014073  Salvia leucophylla Fred M. Roberts 2008-5-28 7012 Orange Lomas de Santiago: Loma Ridge, Haul Road Cyn. (tributary to lower Limestone Cyn.) along Haul Rd. c.a. 0.8 km by road S Santiago Cyn. Rd., 2.6 km N Bee Peak and 3.4 km WNW Silverado Sch. 290 Comment
  RSA550594  Salvia leucophylla Fred M. Roberts 1989-4-26 4320 Orange Santa Ana Mtns.: Lower Blind Canyon near mouth, 9.2km SW Sierra Peak, 1.0km N Irvine Lake spillway. 213 Comment
  UCSB47598  Salvia sonomensis Roberts, Fred 1982-5-1 Santa Barbara Miranda Pines Road; 4.0km SW Miranda Pine Mtn; 1.4km ESE Johnson Suprise Springs 1207 Comment
  RSA587877  Sambucus mexicana Fred M. Roberts 1990-5-8 4624 Orange Chino Hills: Soquel Canyon, ca. 1.4km Nof Gilman Peak. 335 Comment
  RSA747631  Sambucus nigra Fred M. Roberts 2008-5-8 6944 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 65 Comment
  RSA788901  Sambucus nigra Fred M. Roberts 2008-6-12 7039 Orange Lomas de Santiago: Loma Ridge, Shoestring Canyon, Shoestring Road near jct. with Santiago Cyn. Rd. 251 Comment
  UCR233745  Sambucus nigra Fred M. Roberts 2008-6-12 7039 Orange Santa Ana Mtns. Foothills, Lomas de Santiago; Loma Ridge, Shoestring Canyon, Shoestring Road near jct. with Santiago Cyn. Rd. 251 Comment
  RSA0073648  Sambucus nigra subsp. caerulea Fred M. Roberts 2012-4-24 7519 Orange San Joaquin Hills: Buck Gully, tributary canyon below San Joaquin Hills Road and 2.0 km W Signal Peak. 167 Comment
  UC61522  Samolus parviflorus Geo. Robertson 1903-11-9 116 San Bernardino San Bernardino Mountains, Arrowhead Arrowhead; San Bernardino Mountains, Arrowhead 914 Comment
  RSA542458  Samolus parviflorus Fred M. Roberts 1987-8-6 3581 Orange San Joaquin Hills: Los Tracos Canyon, 0.9km ESE Pelican Hill. 78 Comment
  IRVC29096  Sanicula arguta Fred M. Roberts 1989-3-17 4211 Orange Aliso Canyon, 3.3km SSE Moulton Pk. Aliso-Wood Canyon Regional Park 30 Comment
  RSA0127339  Sanicula arguta Fred M. Roberts 2016-3-17 8021 Orange San Joaquin Hills: City of Irvine, Ridge between Coyote Canyon and Bommer Canyon along Turtle Ridge Trail, 0.6 km NNE Signal Peak and 1.1 km SW Cattle Camp. 314 Comment
  RSA588796  Sanicula arguta Fred M. Roberts, Dave Bontrager 1990-4-18 4564 Orange Rancho Mission Viejo: ridge between Christianitos and Gabino Canyons (Riverside Cement Lease Holding), 5.5 km SE Playa Survey Marker. 152 Comment
  RSA749317  Sanicula bipinnatifida Fred M. Roberts, Linda Farley 2008-3-28 6819 Orange Santa Ana Mtns.: Upper Weir Cyn., east fork along ridge just west of SR241, 3.4 km E Robber s Peak, Irvine Land Conservancy. 437 Comment
  RSA0012752  Sanicula crassicaulis Fred M. Roberts 2012-5-10 7577 Orange San Joaquin Hills: Buck Gully, south tributary, north slope Pelican Hill, just north of Pelican Hills Drive, 0.7 km N Pelican Hill summit. 154 Comment
  UCSB48365  Sanicula crassicaulis Roberts, Fred 1982-4-18 Orange Santa Ana Mtns.; Upper Hot Springs Cyn., 0.1 km. SW Falcon Group Camp; 0.2 km. SE Los Pinos Peak 1075 Comment
  UCSB49714  Sanicula crassicaulis Roberts, D. 1983-4-16 Santa Barbara Along northeast edge of upper reservoir; la Purisima Mision State Historic Park; 2 km. NE of Lompoc City Limit Comment
  IRVC22550  Sanicula crassicaulis var. crassicaulis Fred M. Roberts 1985-5-1 1706 Orange Aliso Canyon, 2.1km NNE Aliso Peak, Aliso Viejo 67 Comment
  UCSB53307  Sarcobatus vermiculatus Roberts, Dar 1983-7-23 Inyo Red Willow Dam, 2 miles N of jet of Fish Slough Rd and Jean Blanc Rd; Fish Slough: 4.5 mi. north of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi drainage axis 1274 Comment
  RSA725514  Schinus molle Fred M. Roberts, Robert L. Allen 2007-9-28 6616 Orange Lomas de Santiago: above lower Santiago Cyn. wash along Santiago Cyn. Rd. just south of Irvine Mesa, 3.3 km N Bolero Lookout. 332 Comment
  UCR239224  Schinus terebinthifolius Fred M. Roberts 2012-4-24 7508 Orange San Joaquin Hills, Buck Gully, west of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km west of Signal Peak 179 Comment
  UCSB36182  Schismus arabicus Roberts, Dar 1980-5-25 Inyo 51 km. N. junction 14 on U.S. 395 1220 Comment
  IRVC20382  Schismus barbatus Fred M. Roberts 1983-3-16 910 Orange Laguna Beach: Sycamore Hills, central ridge, 1.1km NNE jct. El Toro and Laguna Canyon Rds.; 5.4km [ESE] Signal Peak. Southern Coastal 156 Comment
  IRVC21787  Schismus barbatus Fred M. Roberts 1985-2-25 1458 Orange Irvine: Irvine Ranch, east of MacArthur Blvd., 1.4km W UCI campus; 1.5km SE Bay View School. Southern Coastal 30 Comment
  IRVC21985  Schismus barbatus Fred M. Roberts, Gordon Marsh 1985-3-12 1530 Orange mesa west of Ave. Pico and north of El Camino Real, 3.2km SSE Coyote Bluff; 0.6km E Bench Mark 16 (sect. 32), San Clemente 37 Comment
  SBBG55100  Schismus barbatus F. M. Roberts, W. Ferren 1982-3-22 457 Santa Barbara 0.3 km W of UC Field Station just N of Central Valley Rd 80 Comment
  RSA0027435  Schoenoplectus americanus Fred M. Roberts 2012-7-18 7673 Orange San Joaquin Hills: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus, of Poppy Street and 2.1 km WNW summit of Pelican Hill. 37 Comment
  RSA731915  Schoenoplectus americanus Fred M. Roberts, Sandy Leatherman 2007-11-27 6664 Orange Anaheim: Santa Ana River, Santa Ana Canyon, just west of Horseshoe Bend on S side of E La Palma Ave., about 0.3km E Weir Cyn. Rd. bridge. 100 Comment
  UCSB52891  Schoenoplectus americanus Roberts, Fred 1984-10-18 Orange Santa Ana Mtns.: San Juan Canyon, 2.5 km. ENE San Juan Guard Station; 4.0 km. WNW Sitton Peak 310 Comment
  RSA0027438  Schoenoplectus californicus Fred M. Roberts 2012-7-18 7672 Orange San Joaquin Hills: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus, of Poppy Street and 2.1 km WNW summit of Pelican Hill. 37 Comment
  RSA731914  Schoenoplectus californicus Fred M. Roberts, Sandy Leatherman 2007-11-27 6665 Orange Anaheim: Santa Ana River, Santa Ana Canyon, just west of Horseshoe Bend on S side of E La Palma Ave., about 0.3km E Weir Cyn. Rd. bridge. 100 Comment
  UCR258354  Schoenoplectus californicus Fred M. Roberts 2014-4-21 7873 Orange South Coast, SAN JOAQUIN HILLS: Laguna Lake 1 (Upper Laguna Lake), south basin 113 Comment
  RSA703733  Scirpus microcarpus Fred M. Roberts, David E. Bramlet 2004-11-5 6131 Orange Rancho Mission Viejo: Donna O Neill Land Conservancy, Gato Cyn., tributary to Cristianitos Cyn., 0.23km W Gato Gate. 102 Comment
  RSA716730  Scirpus microcarpus Fred M. Roberts, David E. Bramlet 2004-11-5 6131 Orange Rancho Mission Viejo: Donna O Neill Land Conservancy, Gato Cyn., tributary to Cristianitos Cyn., 0.23km W Gato Gate. 102 Comment
  UCSB48201  Scirpus microcarpus Roberts, Fred 1981-6-26 Orange Santa Ana Mtns.; San Juan Canyon; 0.1 km. N Lower San Juan Picnic Ground 390 Comment
  UCSB47591  Scrophularia californica Roberts, Fred 1980-4-5 Orange Highway 74, San Juan Canyon, 0.4km sw Lower San Juan Picnic Ground, Santa Ana Mountains, 390 Comment
  RSA0012747  Scrophularia californica subsp. floribunda Fred M. Roberts 2012-5-10 7572 Orange San Joaquin Hills: Buck Gully, south tributary, north slope Pelican Hill, just north of Pelican Hills Drive, 0.7 km N Pelican Hill summit. 154 Comment
  RSA701800  Scrophularia californica subsp. floribunda Fred M. Roberts, David E. Bramlet 2003-6-6 5889 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.7km SW int. Cristianitos and TRW Rds. and 0.23km W of SDGandE substation. 94 Comment
  UCR209339  Scrophularia californica subsp. floribunda Fred M. Roberts 2008-4-22 6919 Orange Lomas de Santiago, Loma Ridge, Lower Hicks Canyon, along Haul Road near asphalt plant, 2.2 km east-northeast of Rattlesnake Reservoir Dam and 2.2 km west-northwest of Bee Peak, Irvine Ranch Conservancy 188 Comment
  RSA0026266  Scutellaria bolanderi subsp. austromontana Fred M. Roberts 2013-6-7 7782 Riverside Peninsular Ranges: Santa Ana Mtns.: Tributary to Upper San Juan Canyon near Chiquito Basin Trail, 1.7 kilometers NNW Upper San Juan Campground. 536 Comment
  UCR211727  Secale cereale Fred M. Roberts 2005-5-19 6204 Riverside Perris Basin, San Jacinto Valley, city of San Jacinto, east of Sanderson Road and south of the Ramona Expressway, 2.6 km south-southwest of Gilman Hot Springs 446 Comment
  RSA0078514  Sedum album Fred M. Roberts, M. J. Roberts 1985-8-8 2110 San Diego Cuyamaca Mountains: Pine Hills, Pine Hills Dr., 3.7 Km. south junction Highway 79. 1160 Comment
  SD234722  Selaginella bigelovii Fred M. Roberts, Andy Pinolo, Kam Muri 2003-5-3 5713 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of ridge east of lower Butteweg Canyon along the border trail, Tijuana River watershed. 305 Comment
  UCSB52471  Selaginella bigelovii Roberts, Fred 1983-1-7 Orange Laguna Beach: west flank of Temple Hill, Park Canyon, 1.7km NE Thurston High School; 1.7km SE Bench Mark 104. 230 Comment
  RSA594877  Selaginella bigelovii Fred M. Roberts, Rick Riefner 1992-2-15 4832 Orange Lomas De Santiago: Foothill Ranch north of El Toro Road, c. 4.7 kilometers SSE Bolero Lookout. 295 Comment
  UCSB43427  Selaginella bigelovii Roberts, Fred 1982-3-24 Santa Barbara 1.9 km SW of Devil's Peak on road to Lagonitas Secas from the top of Centinella Grade. Santa Cruz Island. 445 Comment
  IRVC28463  Selaginella cinerascens Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5752 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  SD164593  Selaginella cinerascens Fred M. Roberts 2001-5-24 5476 San Diego Lusardi Creek MSCP parcel: Mesas N of Lusardi Creek, 1.2 m N Low South Survey Marker. Mesas along abandoned dirt road on rocky clay soil in coastal sage scrub bordering chamis chaparral 92 Comment
  SD233633  Selaginella cinerascens Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5794 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242. 470 Comment
  SD242347  Selaginella cinerascens Fred Roberts 2009-9-29 7163 San Diego San Diego: Upper Deer Canyon drainage just west of Abling Ave. 110 meters north of the SR56 centerline and 190 meters east of the Carmel Mtn. Rd./SR56 bridge. UTM Z11 04 56 466mE 36 46 297mN, Del Mar USGS 7.5min Quad. 124 Comment
  UCR128424  Selaginella cinerascens Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5794 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 470 Comment
  RSA539420  Senecio aphanactis Fred M. Roberts 1989-3-7 4200 Orange Lomas de Santiago: Loma Ridge, tributary to Hicks Canyon, 2.1km W Bee Survey Mark, UTM 37 32 300mN, 4 33 150mE, alt. 183 meters. 183 Comment
  RSA588799  Senecio californicus Fred M. Roberts, D. Bontrager 1990-4-18 4561 Orange Rancho Mission Viejo: ridge between Christianitos and Gabino Canyons (Riverside Cement Lease Holdong), 5.5 km SE Playa Survey Marker. 152 Comment
  RSA737542  Senecio californicus Fred M. Roberts 2008-3-12 6719 Orange Dana Point: Dana Point Headlands CNLM Preserve, western side, c.a. 0.8 km W Marine Institute (Dana Point Harbor). 50 Comment
  UCSB52922  Senecio californicus Roberts, Fred 1983-3-10 Orange Dana Point Headlands: south of Dana Strand Rd., 0.8km W Dana Point Harbor; 1.0km SW Richard Henry Dana School 66 Comment
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Dec 12 2018
  SEINET12725686 Image available Senecio serra J. H. Robertson, Y. Robertson 1979-7-18 s.n. Mono North Fork Sweetwater Creek, site 95.; 38.435218 -119.373505. 2804 Comment
  RSA0127340  Senecio vulgaris Fred M. Roberts 2016-3-17 8022 Orange San Joaquin Hills: City of Irvine, Ridge between Coyote Canyon and Bommer Canyon along Turtle Ridge Trail, 0.6 km NNE Signal Peak and 1.1 km SW Cattle Camp. 314 Comment
  RSA747607  Senecio vulgaris Fred M. Roberts 2000-5-4 5314 Orange Lomas de Santiago: Loma Ridge, Hicks Cyn., west of SR 241, 1.9 km E Rattlesnake Reservoir dam and 2.1 km WSW Bee Peak. 210 Comment
  UCR220085  Senna Fred M. Roberts, Ian Cain, Chezzy W. Brungraber 2010-5-3 7294 Los Angeles Los Angeles Basin, Montebello Hills, oil field above Sycamore Canyon and North Montebello Blvd, 0.6 km southeast of Paramount Blvd Bridge over Pomona Fwy 138 Comment
  RSA0069225  Senna marilandica Fred M. Roberts, Sandra Leatherman 2008-9-3 7080 Orange Yorba Linda: Santa Ana River Canyon, Santa Ana River, 0.6 km W Gypsum Cyn. bridge, south of La Palma Ave. 113 Comment
  UCR266664  Senna marilandica Fred M. Roberts, Sandra L. Leatherman 2008-9-3 7080 Orange YORBA LINDA: Santa Ana River Canyon, Santa Ana River, 0.6 km W Gypsum Cyn. bridge, south of La Palma Ave 113 Comment
  IRVC24099  Senna multiglandulosa Fred M. Roberts, R. L. Allen 1985-9-3 2201 Orange Lower San Juan Canyon, Hwy 74, c.a. 14.4km NE San Juan Capistrano by road, Casper's Regional Park 184 Comment
  IRVC25222  Sesuvium verrucosum Fred M. Roberts 1986-11-4 3213 Orange Anaheim Bay, north of Hog Island, Seal Beach Naval Weapons Station 0 Comment
  UCSB52902  Sesuvium verrucosum Roberts, Fred 1983-9-29 Orange Irvine; San Joaquin Freshwater Marsh, 1.6 km. NNW UCI campus center 2 Comment
  RSA719406  Setaria adhaerens Fred M. Roberts, Robert L. Allen 2006-10-8 6429 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 0.3km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  RSA731924  Setaria adhaerens Fred M. Roberts, Sandy Leatherman 2007-11-27 6686 Orange Yorba Linda: drainage channel on east side of Amberdale Dr. ca. 0.3 km S Fairmont Blvd. 118 Comment
  IRVC21695  Setaria lutescens Fred M. Roberts 1984-8-6 1366 Orange UC Irvine, along Adobe Circle Road, 0.9km ENE campus center; 2.3km W French Hill, Irvine 30 Comment
  RSA0027437  Setaria parviflora Fred M. Roberts 2012-7-18 7676 Orange San Joaquin Hills: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus of Poppy Street and 2.1 km WNW summit of Pelican Hill. 37 Comment
  UCR236679  Setaria parviflora Fred M. Roberts, Sandra L. Leatherman 2008-9-17 7101 Orange Peninsular Ranges, Santa Ana River Canyon: Yorba Linda Regional Park adjacent to Santa Ana River, South of La Palma Ave. and 1.7 km ENE Imperial Hwy. bridge over river 87 Comment
  RSA542393  Sidalcea malviflora Fred M. Roberts, K. Keane 1988-5-25 3982 Orange Ranch Mission Viejo: Lower Canada Chiquita, 2.5 kilometers SSE Medium Rancho Survey Mark. 82 Comment
  UCSB47611  Sidalcea malviflora Roberts, Fred 1980-5-3 Orange 0.1km NE Falcon Group Camp, Santa Ana Mtns. 1012 Comment
  IRVC28099  Silene antirrhina Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5782 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  RSA752036  Silene antirrhina Fred M. Roberts 2008-3-27 6813 Orange Dana Point: Dana Point Headlands, CNLM Preserve near Outlook 1, 0.5km W Marine Institute (Dana Point Harbor). 45 Comment
  RSA680931  Silene gallica Fred M. Roberts, Andy Pinolo, Kam Muri 2003-5-3 5698 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side near crest of ridge east of lower Butteweg Canyon along the border trail, Tijuana River watershed. 305 Comment
  UCR128512  Silene gallica Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5698 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed 305 Comment
  CAS-BOT-BC393585  Silene gallica Robert Robertson 1954-5-8 132 Monterey E of Carmel Cove, Point Lobos 15 Comment
  IRVC28333  Silene gallica Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5698 San Diego Otay Mountain, south side near crest of ridge east of lower "Butteweg Canyon" along the border trail, Tijuana River watershed Peninsular Range, San Ysidro Mountains 305 Comment
  UCSB47971  Silene gallica Roberts, Fred 1980-2-17 Orange Dana Bluffs; along Scenic Drive Rd.; NW and above Dana Point Harbor, Dana Point 58 Comment
  RSA0013912  Silene laciniata Fred M. Roberts 2012-5-10 7584 Orange San Joaquin Hills: Buck Gully, south fork, north slope of Pelican Hill, along Pelican Hills Dr., 0.3 km N summit Pelican Hill. 189 Comment
  SBBG71646  Silene laciniata G. Robertson -Aug-1903 Unknown San Pedro Martir Comment
  CAS-BOT-BC389125  Silene laciniata subsp. californica Sue Roberts 1954-5-20 113 Mendocino 6 miles east of Hopland on road from Lakeport to Hopland 914 Comment
  IRVC20496  Silene laciniata subsp. major Fred M. Roberts 1983-5-4 1026 Orange Temple Hill, Upper Rancho Laguna Canyon, 1.7km SSW Top of the World Sch.; 1.4km ENE Cactus Point, Laguna Beach 200 Comment
  RSA581444  Silene laciniata subsp. major Fred M. Roberts 1989-5-12 4363 Orange Santa Ana Mountains: Santiago Canyon, Flemming Regional Park, just E of Modjeska at end of paved road, ca. 3.2 kilometers WSW Laurel Springs. 455 Comment
  RSA699745  Silene laciniata subsp. major Fred M. Roberts, David E. Bramlet 2003-5-15 5874 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 1.41km SSW Gato Gate and 0.35km NNW of SDG&E substation. 122 Comment
  UCR209365  Silene laciniata subsp. major Fred M. Roberts, Linda Farley 2008-3-28 6831 Orange Santa Ana Mountains, Upper Weir Canyon, Irvine Ranch Conservancy, 3.3 km east-northeast of Robbers Peak on ridge north of canyon 427 Comment
  RSA708224  Silene lemmonii Fred M. Roberts, Robert L. Allen, Chris Barnhill, Nancy Hatfield 2005-5-30 6217 Orange Main Divide Road, ridge between Silverado and Bixby Canyons, coastal slope, 0.46km (air) S Bald Peak. 1203 Comment
  UCR128374  Silene multinervia Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5760 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' c. 0.4 mi. north of the Mexican border, Tijuana River watershed 183 Comment
  RSA588654  Silene multinervia Fred M. Roberts, Carol A. Roberts 1990-5-23 4654 Orange West Fork, Upper Long canyon, near Main Divide Truck Trail, 4.4km SE Los Pinos Peak. 768 Comment
  RSA599645  Silene multinervia Fred M. Roberts, Carol A. Roberts, Kirsten Winter 1995-5-6 4940 Orange Ridge between Hot Springs Canyon and Viejo Canyon, San Juan Trail, 3.4 km WNW Lower San Picnic ground. 549 Comment
  CAS-BOT-BC364856  Silybum marianum Robert Robertson 1954-4-14 76 San Mateo N.W. of Palo Alto Yacht Club 3 Comment
  RSA749361  Sisymbrium irio Fred M. Roberts 2008-4-15 6900 Orange Lomas de Santiago: Loma Ridge, Lower Hicks Cyn., east ridge, Conservation Trail, 1.6 km ESE Rattlesnake Reservoir dam and 2.7 km WSW Bee Peak, Irvine Ranch Conservancy. 172 Comment
  UCR128415  Sisymbrium orientale Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5732 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side in lower 'Butteweg Canyon' just above border trail, Tijuana River watershed 183 Comment
  RSA747707  Sisyrinchium bellum Fred M. Roberts 2008-5-16 6985 Orange Dana Point: Dana Point Hradland, CNLM Preserve, north of Marguerita Drive, 0.5 km WNW Marine Institute, Dana Point Harbor. 75 Comment
  IRVC24222  Sitanion jubatum Fred M. Roberts, Karlin G. Marsh, Gordon Marsh 1985-10-1 2279 Orange Silverado Canyon, Silverado Canyon Road, 1.0km by road E junction Santiago Canyon Road. Santa Ana Mountains 320 Comment
  RSA542351  Solanum americanum Fred M. Roberts Jr. 1988-7-27 4124 San Diego Santiago Peak, Main Divide Truck Trail at Orange-Riverside County line, 0.5 km north summit 1659 Comment
  RSA752039  Solanum americanum Fred M. Roberts 2008-3-27 6809 Orange Dana Point: Dana Point Headlands, CNLM Preserve near NE Gate, 0.5km W Marine Institute (Dana Point Harbor). 75 Comment
  RSA743382  Solanum douglasii Fred M. Roberts 2008-5-27 7001 Orange Dana Point: Dana Point Headlands, CNLM Preserve near NE Gate, 0.5km W Marine Institute (Dana Point Harbor). 75 Comment
  UCR224154  Solanum douglasii Fred M. Roberts 2008-5-27 7001 Orange South Coast, Dana Point Headlands, CNLM Preserve, along north slopes above Dana Strand Beach, 0.8 km west norhwest of Marine Institute, Dana Point Harbor 75 Comment
  UCSB48090  Solanum douglasii Roberts, Fred 1981-5-2 Orange Mission Viejo: Camino Capistrano, 1.7km N Crown Valley Parkway 49 Comment
  RSA599592  Solanum rostratum Fred M. Roberts Jr., Nigel Hancock 1995-5-25 4947 Orange Costa Mesa; Fairview Park, Just west of end of Canyon Drive, 0.1 km W Canyon School. 24 Comment
  RSA550607  Solanum umbelliferum Fred M. Roberts Jr., Carol A. Roberts 1989-4-20 4307 Orange upper Lion Canyon along San Juan Trail just south of Blue Jay Campground, 2.5 km. SE Los Pinos Peak 980 Comment
  RSA587879  Solanum umbelliferum Fred M. Roberts 1990-5-8 4622 Orange Chino Hills: Soquel Canyon, c.a. 1.4 km N Gilman Peak. 335 Comment
  SD164412  Solanum xanti Fred M. Roberts 2001-4-9 5400 San Diego Jamul Mtns.: Southwest slopes, northeast of Upper Otay Lake, 5.4 km southeast summit Mother Miguel Mtn. Otay Lakes MSCP parcel. Knoll along ridge on mostly gentle southwest-facing slope in rocky, open coastal sage scrub and annual grassland 309 Comment
  SD235054  Solanum xanti Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5738 San Diego Peninsular Range, San Ysidro Mtns.: Otay Mountain, south side in lower Butteweg Canyon just above border trail, Tijuana River watershed. 167 Comment
  RSA0127412  Sonchus asper Fred M. Roberts 2016-3-17 8007 Orange San Joaquin Hills: City of Irvine, Bommer Canyon, east fork, 0.3 km ESE Cattle Camp near East Fork Trail. 152 Comment
  RSA730994  Sonchus oleraceus Fred M. Roberts 2006-11-15 6468 Orange Santa Ana Cyn., Santa Ana River, north bank, 1.1 km ENE Imperial Hwy crossing. 85 Comment
  SD192394  Sonchus oleraceus Fred Roberts 2006-7-6 6358 San Diego Oceanside: San Luis Rey River Valley, adjacent to SR76 at SE corner of SR76 and Loretta St., about 0.9km E Interstate 5. 7 Comment
  RSA719412  Sorghum bicolor Fred M. Roberts, Robert L. Allen 2006-10-8 6433 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 0.3km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  IRVC23156  Sorghum halepense Fred M. Roberts 1985-7-11 2016 Orange San Joaquin Hills: Laguna Canyon, Laguna Canyon Road near Laguna Lakes, 5.0km ENE Signal Peak. southern coastal 112 Comment
  IRVC24181  Sorghum halepense Fred M. Roberts 1985-9-17 2258 Orange Irvine; lot between Walnut Avenue, Harvard Avenue and Peter's Creek Channel. southern coastal 20 Comment
  UCSB36169  Sorghum halepense Roberts, Dar 1980-5-29 Santa Barbara 50 yds S. of bridge on Hollister, closest to Hollister, Fairview intersection along Vegas-San Pedro creek 4 Comment
  RSA548855  Spartina foliosa Fred M. Roberts 1986-10-31 3185 Orange Seal Beach Naval Weapons Station: Anaheim Bay, vicinity of Hog Island., UTM 3732900m N, 400900m E 0 Comment
  SD183914  Spartina foliosa Fred Roberts 2000-9-25 5348 San Diego San Diego Bay: Chula Vista, F. & G. Marsh along Marina Parkway just N of G Street Comment
  IRVC21281  Spartium junceum Fred M. Roberts 1984-3-15 1259 Orange Niguel Hill, at end of Sea Island Dr., 1.9km SE Aliso Peak, South Laguna 210 Comment
  RSA0013956  Spergularia macrotheca var. macrotheca Fred M. Roberts 2008-5-7 6943 Orange Lomas de Santiago: Loma Ridge, Limestone Ridge between Dripping Spr. and Limestone Cyn., 3.5 km NW Bolero Lookout and 1.7 km E Bee Peak. Irvine Ranch Conservancy. 481 Comment
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Feb 27 2019
  UCR220089  Spergularia macrotheca var. macrotheca Fred M. Roberts 2008-5-7 6943 Orange Lomas de Santiago, Limestone Ridge between Dripping Spring and Limestone Canyon, 3.5 km NW of Bolero Lookout and 1.7 km east of Bee Peak. Irvine Ranch Conservancy 481 Comment
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Feb 27 2019
  RSA0097841  Spergularia macrotheca var. macrotheca Fred M. Roberts, Julie Vanderwier 1997-4-29 5019 Orange Bolsa Chica Salt Marsh (US Fish & Wildlife Service cell 17); west of old oil field, 1.7 km SSE of Chica Survey Mark. 0 Comment
  UCR162955  Spergularia marina Fred M. Roberts, D. E. Bramlet 2005-4-1 6151 Riverside Upper Salt Creek, W of Hemet, parcel between Devonshire and Florida, c. 0.2km N of Florida and 0.2km W San Diego Aquaduct; c. 2km NW Ryn Field 457 Comment
  SEINET11931098  Spergularia rubra Roberts 1973-1 Brec. 1398 Santa Barbara on upper margin of Prisoner's Harbor Beach on N side of Santa Cruz Island Comment
  UCSB52392  Spergularia salina Roberts, Fred; Ferren, Wayne 1982-7-21 Orange Newport Beach; Upper Newport Back Bay, Back Bay Dr., 3.5 km. N San Joaquin Hills Rd.; 3.0 km. W UC Irvine campus 2 Comment
  UCSB52915  Spergularia salina Roberts, Fred; Marsh, K. 1983-5-13 Orange Dana Point Headlands; north of Dana Strand Road, 0.4 km. W Dana Point Harbor; 0.7 km. SSW Richard Henry Dana School 80 Comment
  RSA0098711  Spergularia villosa Fred M. Roberts, Laura Cohen 2000-3-24 5266 Orange Rancho Mission Viejo Land Conservancy: Tributary to Christanitos Cyn., Flagpole Meadow, upper Shady Canyon Trail, about 1.6 km NW Sycamore Gate. 170 Comment
  UCSB53028  Sphaeralcea ambigua Roberts, Dar 1983-7-23 Mono 1 mile S of Rocked-in-Spring on east side of slough; 4.5 mi. north of Bishop at the northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis 1341 Comment
  SD242354  Sporobolus airoides Fred Roberts 2011-9-9 7472 San Diego San Marcos: Universal Boot parcel, along north side of San Marcos Blvd. about 150 meters W jct. South Los Posas Rd. San Marcos USGS 7.5min Quad. 160 Comment
  UCSB53346  Sporobolus airoides Roberts, Dar 1983-7-22 Mono Fish Slough; 50 m. north of pupfish refuge west of second dirt rd. paralleling the fence, NW end of slough Comment
  UCSB53347  Sporobolus airoides Roberts, Dar 1983-7-22 Mono Fish Slough; west of second dirt rd. paralleling the fence; SE of Pister's Pond (pupfish refuge) at NW end of slough Comment
  UCR236674  Sporobolus indicus Fred M. Roberts, Sandra L. Leatherman 2008-9-17 7106 Orange Peninsular Ranges, Santa Ana River Canyon: Yorba Linda Regional Park adjacent to Santa Ana River, South of La Palma Ave. and 1.7 km ENE Imperial Hwy. bridge over river 87 Comment
  UCD93166  Sporobolus indicus Roswell D. Roberts 1974-3-15 s.n. Tuolumne Tuolumne County. Comment
  SBBG55091  Stachys bullata D. Roberts, J. Leech 1982-3-23 Santa Barbara 0.4 km W of Los Pinos del Sur at ravine fork 225 Comment
  UCSB43412  Stachys bullata Roberts, Dar; Leech, John 1982-3-23 Santa Barbara 0.4 km west of Los Pinos del Sur at ravine fork; Santa Cruz Island 225 Comment
  UCSB36135  Stachys bullata Roberts, Dar 1980-2-2 Santa Barbara 11 miles on Refugio Rd; from 101 junct; Santa Ynez Mts 545 Comment
  UCSB47601  Stachys bullata Roberts, Fred 1982-4-29 Ventura Serrano Road; 0.7 km SE Triunfo Pass; 0.3 km NE Triunfo Lookout; Santa Monica Mtns 722 Comment
  RSA0012748  Stachys rigida subsp. quercetorum Fred M. Roberts 2012-5-10 7573 Orange San Joaquin Hills: Buck Gully, south tributary, north slope Pelican Hill, just north of Pelican Hills Drive, 0.7 km N Pelican Hill summit. 154 Comment
  RSA542483  Stachys rigida subsp. quercetorum Fred M. Roberts, R. E. Riefner 1988-7-19 4115 Orange Santa Ana Mountains; Maple Springs Truck Trail, Upper Silverado Canyon, 1.9km N Modjeska Peak. 1128 Comment
  RSA717155  Stachys rigida subsp. rigida Fred M. Roberts, Chris M. Barnhill 2005-9-27 6284 Orange San Juan Capistrano: San Juan Creek wash, east of La Novia Road bridge, 1.4 km E Mission San Juan Capistrano. 27 Comment
  UCSB47600  Staphylea bolanderi Roberts, Fred 1981-5-14 Mariposa Above Merced River along Calif. 140, 5.5km N Briceburg, Sierra Nevada 656 Comment
  RSA542590  Stebbinsoseris heterocarpa Fred M. Roberts, Karlin G. Marsh 1988-4-25 3934 Orange San Joaquin Hills: East flank Pelican Hill, 0.9 kilometer SE summit. 120 Comment
  RSA743497  Stellaria media Fred M. Roberts 2008-3-19 6780 Orange Dana Point: Dana Point Headlands, CNLM Preserve, 0.8km W Marine Institute, Dana Point Harbor. 45 Comment
  RSA548856  Stenotaphrum secundatum Fred M. Roberts, Wayne Ferren 1987-4-8 3364 Orange Upper Newport Beach Back Bay, west side, North Star Beach, 0.8 km N Coney Island., UTM 3720900m N, 417450m E 0 Comment
  SEINET13170464 Image available Stenotus acaulis J. H. Robertson, Y. Robertson 1979-6-20 s.n. Mono 6.1 mi from HW 182 along road. Toiyabe NF, 4.5 mi from boundary. 2469 Comment
  UC61524  Stephanomeria cichoriacea Geo. Robertson 111 San Bernardino Forest Home San Bernardino Mts. 1524 Comment
  IRVC23252  Stephanomeria diegensis Fred M. Roberts 1982-7-30 787 Orange Niguel Hill, 0.9km ENE Aliso Peak, Laguna Niguel 260 Comment
  RSA0044742  Stephanomeria diegensis Fred M. Roberts, Art Davenport 2003-9-11 6010 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy. Cristianitos Cyn., 0.79 km N Sycamore Gate 0.23 km w of Crisianitos Road. 126 Comment
  RSA703680  Stephanomeria diegensis Fred M. Roberts, David E. Bramlet 2004-11-5 6128 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, west slopes of Cristianitos Cyn., 0.79 km N Sycamore Gate and 0.18 km W Cristianitos Road. 146 Comment
  UCR177707  Stephanomeria diegensis Fred M. Roberts, D. E. Bramlet 2004-11-5 6128 Orange Rancho Mission Viejo; Donna O'Neill Land Conservancy, west slopes of Cristianitos Canyon, 0.79 km N Sycamore Gate and 0.18 km W Cristianitos Road 146 Comment
  RSA719419  Stephanomeria exigua subsp. exigua Fred M. Roberts, Lee Ann Caranza 2006-10-25 6459 Orange Dana Point Headlands south of Margarite Drive, 0.6km W Marine Institute and 1km SW Cook Sch. 58 Comment
  RSA743387  Stephanomeria exigua subsp. exigua Fred M. Roberts 2008-7-10 7065 Orange Dana Point: Dana Point Headlands, CNLM Preserve, near Strands Road Gate, 0.8km WNW Marine Institute, Dana Point Harbor. 65 Comment
  UCSB36148  Stephanomeria pauciflora Roberts, D. 1980-6-1 Inyo West of Trona-Wildrose Rd. 14.5 km. N of Trona 655 Comment
  IRVC28329  Stipa diegoensis Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5703 San Diego Otay Mountain, south side near crest of ridge east of lower "Butteweg Canyon" along the border trail, Tijuana River watershed Peninsular Range, San Ysidro Mountains 305 Comment
  SD164569  Stipa diegoensis Fred M. Roberts 2001-5-15 5465 San Diego Jamul Mtns.: southwest slopes, east of Upper Otay Lake, 5.3 km southeast summit Mother Migual Mtn. Otay Lakes North MSCP parcel. Near hilltop on gentle south-facing slope on rocky clay loam soil and about boulders in coastal sage scrub. 352 Comment
  UCR128530  Stipa diegoensis Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5784 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 427 Comment
  SD143279  Stipa lepida Fred M. Roberts 1997-4-11 4994 San Diego Carlsbad:Upper Encinitas Creek watershed east of Rancho Santa Fe Road,Fieldstone southeast,ca. 5.7 km southwest Double Peak Frequent on gentle east-facing slope in open mosaic of coastal sage scrub & native grassland that had burned in October 1996. 88 Comment
  UCR239632  Stipa lepida Fred M. Roberts 2012-4-24 7511 Orange San Joaquin Hills, Buck Gully, west of intersection of Ridge Park Road and Newport Coast Drive, 1.5 km west of Signal Peak 179 Comment
  SEINET8080206  Stipa nevadensis J. H. Robertson, Y. M. Robertson 1979-6-20 s.n. Mono Toiyabe NF, 2.9 miles from boundary, 4.5 miles along Masonic Hills Road from Hwy 182, 0.1 mile SE of Red Mine dump below road. 2414 Comment
  UCR128865  Stipa pulchra Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5811 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 470 Comment
  UCR223959  Stipa pulchra Fred M. Roberts 2008-4-9 6863 Orange South Coast, Dana Point, Dana Point Headlands, CNLM Preserve, near Outlook 2, 0.7 km west of Marine Institute, Dana Point Harbor 52 Comment
  UCR209387  Streptanthus bernardinus Fred M. Roberts, Brenda McMillan 2004-5-25 6051 San Bernardino San Bernardino Mountains, Fern Cnyon, east of Cedar Glen, 0.9 km east of Hook Road and 0.5 km south of Coulter Road 1779 Comment
  IRVC28490  Stylocline gnaphalioides Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5791 San Diego Otay Mtn; head of cyn 2 miles NW of Otay Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 470 Comment
  RSA684307  Stylocline gnaphaloides Fred M. Roberts 2003-3-13 5588 Orange Donna O'Neill Land Conservancy: Ridge west of Christianitos Canyon, 1,320m NW Sycamore Gate and 880m W Cristianitos Rd. 179 Comment
  SD233772  Stylocline gnaphaloides Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5791 San Diego Peninsular Ranges, San Ysidro Mountains:Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca 0.4 mi. WSW of peak 2242 (Otay Mountain 7.5' Q). 470 Comment
  UCR203982  Stylocline gnaphaloides Fred M. Roberts 2008-3-12 6720 Orange South Coast, Dana Point Headlands Center for Natural Lands Mgmt. Preserve, west side, c. 0.8 km west of Marine Institute, Dana Point Harbor 50 Comment
  UCR223962  Stylocline gnaphaloides Fred M. Roberts 2008-4-9 6856 Orange South Coast, Dana Point, Dana Point Headlands, CNLM Preserve, near Outlook 2, 0.7 km west of Marine Institute, Dana Point Harbor 52 Comment
  RSA725580  Styrax redivivus Fred M. Roberts, Robert L. Allen, Trish Smith 2007-6-15 6534 Orange Along dirt road on ridge between Fremont and Black Star Cyns., 5.2km ENE Irvine Lake Spillway and 1.7km W Hidden Ranch. 739 Comment
  IRVC25415  Suaeda taxifolia Fred M. Roberts, Wayne Ferren 1987-4-8 3356 Orange Upper Newport Back Bay, west side, North Star Beach, 0.8km N Coney Island, Newport Beach 0 Comment
  UCSB48081  Suaeda taxifolia Roberts, Fred 1981-11-15 Orange Newport Beach: Upper Newport Back Bay; Bayside Dr.; 0.2 km. N central parking area 2 Comment
  UCSB48369  Suaeda taxifolia Roberts, Dar; Roberts, Fred 1982-4-19 Orange Newport Beach: Corona del Mar, Bayside Dr.; 3.0 km. SSW Corona del Mar High School; E of Balboa Island 3 Comment
  RSA0063398  Symphoricarpos mollis Fred M. Roberts 1990-5-8 4620 Orange Chino Hills: Soquel Canyon, c. 1.2 km NNW of Gilman Peak. 240 Comment
  RSA752319  Symphoricarpos mollis Fred M. Roberts 2008-5-20 7132 Orange Lomas de Santiago: Loma Ridge, Upper Limestone Cyn., 0.8 km NW Bolero Spr. and 3.1 km WNW Bolero Lookout. Irvine Ranch Conservancy. 467 Comment
  RSA704427  Tamarix ramosissima Fred M. Roberts, David E. Bramlet 2004-7-30 6084 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy. Cristianitos Cyn along Cristianitos Crk, 1.1 km SSW Gato Gate and 0.32 km W Cristianitos Road. 73 Comment
  RSA731912  Tamarix ramosissima Fred M. Roberts, Sandra Leatherman 2007-11-27 6667 Orange Anaheim: Santa Ana River, Santa Ana Canyon, just west of Horseshoe Bend on S side of E La Palma Ave., about 0.3km E Weir Cyn. Rd. bridge. 100 Comment
  UCSB52462  Tanacetum parthenium Roberts, Jr., Fred 1982-7-4 Orange Chino Hills; Carbon Canyon, Carbon Canyon Rd., 0.6 km. by road SW county line; 2.3 km. NNW Gilman Peak 250 Comment
  UCSB47871  Taraxacum officinale Roberts, Dar 1983-2-20 Santa Barbara La Purisima Mission State Historic Park. 2 km NE of Lompoc City Limit; on west side of visitor's bldg. Comment
  RSA749430  Tauschia arguta Fred M. Roberts 2008-4-14 6894 Orange Santa Ana Mtns.: Upper Weir Cyn., east fork, 3.4 km E Robbers Peak, Irvine Ranch Conservancy. 433 Comment
  UCSB47643  Tauschia arguta Roberts, Fred 1980-5-3 Orange On fire break east of Main Drive Truck Trail, 1.2 km. west of Trabuco Pk., Santa Ana Mtns. 1387 Comment
  RSA539396  Tauschia parishii Fred M. Roberts 1988-6-10 4096 Orange Santa Ana Mountains: Modjeska Peak, 0.9km SW summit. 1542 Comment
  RSA679087  Tauschia parishii Fred M. Roberts 2003-6-25 5940 Orange Santiago peak, north slopes along ridge east of Main Divide truck trail, 0.6km NNW summit. 1605 Comment
  RSA539421  Tetradymia comosa Fred M. Roberts, Doug Willick 1988-9-16 4134 Orange Peralta Hills: Oak Canyon Nature Center, Upper Walnut Canyon, 1.1 km N Robbers Peak 177 Comment
  SEINET3149704  Tetradymia comosa G. Robertson 1903-11-9 115 San Bernardino 'Forest Home', Mill Creek, San Bernardino Mts. 1829 Comment
  CAS-BOT-BC438269  Tetragonia tetragonoides Robert Robertson 1954-4-14 74 San Mateo N.W. of Palo Alto Yacht Club. 3 Comment
  RSA542416  Thalictrum fendleri Fred M. Roberts, Karlin G. Marsh 1987-5-14 3441 Orange Santa Ana Moutains: Upper Trabuco Canyon, Trabuco Canyon Trail , 1.3 km NE Los Pinos Peak 1231 Comment
  IRVC28040  Thalictrum fendleri var. polycarpum Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5747 San Diego Otay Mtn; S side in lower "Butteweg Canyon" just above border trail, Tijuana River watershed. Peninsular Ranges, San Ysidro Mountains 168 Comment
  SBBG68846  Thermopsis macrophylla Robertson 1932-4-28 Santa Barbara Camp Drake Comment
  UCSB50697  Thinopyrum intermedium Roberts, Fred 1982-7-20 Orange Santa Ana Mtns., Main Divide Extension 1.0km NE by road from Falcon Group camp. 1000 Comment
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Aug 30 2018
  CHSC14008  Thysanocarpus curvipes J. A. Roberts 1973-4-12 11 Yuba 3 mi e of road. At U.C. Sierra Foothills Range Field Station. 609 Comment
  RSA749429  Thysanocarpus curvipes Fred M. Roberts 2008-4-14 6893 Orange Santa Ana Mtns.: Upper Weir Cyn., east fork, 3.4 km E Robbers Peak, Irvine Ranch Conservancy. 433 Comment
  UCSB48237  Thysanocarpus curvipes Roberts, Jr., Fred 1981-5-3 Orange Santa Ana Mtns.: San Juan Canyon, Hwy 74, rdsd 111, 2.7 km. ENE San Juan Guard Station 321 Comment
  SD264147  Thysanocarpus curvipes subsp. curvipes Jim Roberts, T. Chester, A. Ballway, M. Crouse, J. Dillane, M. Kennedy, M. Peters 2015-3-12 96 San Diego Fallbrook; Gird Valley Preserve; NW of borrow pit; just W of golf course; 0.33 miles NW of junction Gird Road and Casablanca Way. 141 Comment
  SD164511  Thysanocarpus laciniatus var. laciniatus Fred M. Roberts 2001-4-9 5402 San Diego Jamul Mtns.: SW slopes, NE of Upper Otay Lake, 5.4 km SE summit Mother Miguel Mtn. Otay Lakes North MSCP parcel. Knoll along ridge on mostly gentle SW-facing slope in rocky, open coastal sage scrub and annual grassland 309 Comment
  JEPS54955  Tonella tenella Harry K. Roberts 1968-4-6 Sonoma 1.5 air mi nne Rio Nido (1 mi ne of Sonoma Mercury Mine, n side of Mt Jackson, on road to lookout); Mt. Jackson 320 Comment
  RSA523395  Tonella tenella Harry K. Roberts 1968-4-6 s.n. Sonoma North side of Mt Jackson, 1.5 airline miles NNE of Rio Nido, on road to lookout, ca 1 mile NE of Sonoma Mercury Mine. 320 Comment
  RSA679217  Torilis arvensis Fred M. Roberts 2003-6-17 5916 Orange Just NE of Falcon roup Camp, 2.1km ESWE Los Pinos Peak just west of main road. 1009 Comment
  RSA716779  Torilis arvensis Fred M. Roberts, Michelle Balk, Robert Allen, Chris Barnhill 2004-6-19 6059 Orange Santa Ana Mtns: Holy Jim Cyn.: Holy Jim Trail, 3.5km SE summit of Santiago Peak. 610 Comment
  UCR247903  Torilis arvensis Fred M. Roberts 2013-6-12 7791 Orange Peninsular Ranges, SANTA ANA MTNS.: Lower Silverado Canyon along Silverado Creek on north side of Silverado Canyon Road, 0.6 km ENE Silverado School and 1.4 km up stream Black Star Road crossing. 320 Comment
  RSA0014988  Torilis nodosa Fred M. Roberts 2008-5-20 6988 Orange Lomas de Santiago: Loma Ridge, Upper Limestone Canyon, 0.8 km NW Bolero Spring and 3.1 km WNW Bolero Lookout. Irvine Ranch Conservancy. 467 Comment
  UCR215295  Torilis nodosa Fred M. Roberts 2008-5-20 6988 Orange Lomas de Santiago, Loma Ridge, upper Limestone Canyon, 0.8 km NW of Bolero Spring and 3.1 km WNW of Bolero Lookout. Irvine Ranch Conservancy 467 Comment
  IRVC21678  Toxicodendron diversilobum Fred M. Roberts 1975-4-1 75 -30 Orange San Juan Canyon, 2.4km ENE San Juan Guard Station, Santa Ana Mountains 290 Comment
  SD263796  Tragopogon dubius Jim Roberts, Jeffrey Field 2014-5-18 64 San Diego Cuyamaca Rancho State Park; near intersection Japacha Fire Road and Highway 79; west side of State Route 79 opposite West Mesa Parking area. 1305 Comment
  RSA542344  Tribulus terrestris Fred M. Roberts, Gordon Marsh 1987-8-31 3598 Orange Santa Ana River: adjacent to Santa Ana, 0.5 km NE 17th St. bridge 27 Comment
  UCSB47603  Trichostema lanatum Roberts, Fred 1982-4-29 Ventura Cotharin Road; 1.6km NE Clark Peak; Santa Monica Mountains 377 Comment
  UCSB52399  Trichostema lanceolatum Roberts, Fred 1982-9-5 Orange Santa Ana Mtns; Chiquito Basin; San Juan Trail; 3.0 km S Los Pinos Peak; 2.2 km SW Blue Jay Campground 905 Comment
  JEPS25828  Trichostema laxum Harry K. Roberts 1961-6-20 Sonoma N and E of Occidental (Harrison Grade summit) Comment
  SD58366  Trichostema laxum Harry K. Roberts 1961-6-20 Sonoma Roadside and open areas at summit of Harrison Grade, north and east of Occidental. Comment
  RSA749431  Trifolium ciliolatum Fred M. Roberts 2008-4-14 6895 Orange Santa Ana Mtns.: Upper Weir Cyn., east fork, 3.4 km E Robbers Peak, Irvine Ranch Conservancy. 433 Comment
  IRVC21995  Trifolium depauperatum var. truncatum Fred M. Roberts, G. A. Marsh 1985-3-12 1518 Orange San Clemente: bluffs above El Camino Real, about 1.1km by road NW Ave. Pico; 0.2km E Bench Mark 16 (sect. 32). southern coastal 30 Comment
  RSA688871  Trifolium hirtum Fred M. Roberts 2003-5-1 5667 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Cristianitos Cyn., 0.49km S Gato Gate and just west of Cristianitos Rd. (San Clemente) 84 Comment
  RSA749522  Trifolium microcephalum Fred M. Roberts 2008-4-8 6847 Orange Lomas de Santiago: Loma Ridge, Upper Dripping Springs Cyn., 1.0 km NE Bee Peak, Irvine Ranch Conservancy. 458 Comment
  UCR209354  Trifolium microcephalum Fred M. Roberts 2008-4-8 6847 Orange Lomas de Santiago, Loma Ridge, Upper Dripping Springs Cnyn, 1.0 km northeast of Bee Peak, Irvine Ranch Conservancy 458 Comment
  RSA599589  Trifolium microcephalum Fred M. Roberts, Trish Smith, Grey Nichols 1995-4-27 4937 Orange Irvine: San Joaquin Hills, Moro canyon, Upper West Fork, ca. 1.8km SE Signal Peak. 274 Comment
  SD143251  Trifolium willdenovii Fred M. Roberts 1997-4-11 5002 San Diego Upper Encinitas Creek watershed east of Rancho Santa Fe Road. 88 Comment
  IRVC22685  Trifolium willdenowii Fred M. Roberts 1985-5-9 1754 Orange Santa Ana Mountains: Upper McVicker Canyon, 1.8km NE Los Pinos Peak. Peninsular Ranges 1113 Comment
  IRVC24837  Trifolium willdenowii Fred M. Roberts, G. A. Marsh 1986-5-16 2878 Orange ridge above San Juan Canyon, Sitton Pk. Truck Trail, 3.2km WSW Sitton Peak, Santa Ana Mountains 657 Comment
  SD143266  Triodanis biflora Fred M. Roberts 1997-4-11 4997 San Diego Carlsbad, upper Encinitas Creek, watershed east of Rancho Santa Fe Road, Fieldstone Southeast ca. 5.7 km southwest Double Peak 88 Comment
  CAS-BOT-BC524332  Triteleia ixioides subsp. ixioides Robert Robertson 1954-5-8 137 Monterey On slope east of Carmel Cove, Point Lobos 15 Comment
  UCSB49459  Triticum aestivum Roberts, Dar 1983-5-1 Santa Barbara La Purisima Mission State Historic Park; Purisima Canyon Comment
  RSA678526  Turricula parryi Fred M. Roberts, D. E. Bramlet 2002-6-6 5522 Orange Santa Ana Mts: Main Divide Truck Trail, above McVicker Cyn., 1.5 km ENE Los Pinos Pk. 1247 Comment
  RSA731761  Typha domingensis Fred M. Roberts, Sandy Leatherman 2007-11-9 6643 Orange San Juan Canyon along San Juan Creek. 0.2 km E communiy of San Juan Hot Springs. 222 Comment
  UCSB52944  Typha domingensis Roberts, Fred 1984-8-6 Orange UC Irvine, along Adobe Circle Road, 0.9km ENE campus center: 2,3km W French Hill 30 Comment
  RSA719407  Typha latifolia Fred M. Roberts, Robert L. Allen 2006-10-8 6428 Orange San Juan Capistrano: San Juan Creek Flood Control Channel, c.a. 0.2 to 0.3km N Stonehill Dr. bridge and 1.1km SSE Marco Forster Jr. High Sch. 4 Comment
  UC1548585  Typha latifolia D. A. Roberts 1983-7-23 FS 125 Inyo 2.7 mi s BLM Spring on e side of Fish Slough (4.5 mi n of Bishop, Fish Slough, northern end of Owens Valley); Fish Slough, n end of Owens Valley 1274 Comment
  UCSB52945  Typha latifolia Roberts, Fred 1984-8-6 Orange UC Irvine, along Adobe Circle Road, 0.9km ENE campus center; 2.3km W French Hill 30 Comment
  RSA0127407  Ulmus parvifolia Fred M. Roberts 2016-5-20 8059 Orange City of Irvine: San Joaquin Hills, Turtle Rock Community along Ridge Route Road, 1.0 km SE summit of French Hill and just NE intersection with Hillsborough Drive. 122 Comment
  SFV12300  Umbellularia californica W. Roberts 1963-4-10 18 Monterey East side of Jamesburg Road, 0.1 miles south of Cachagua Road. 427 Comment
  UCSB34447  Umbellularia californica Roberts, Fred 1980-2-2 Santa Barbara On E side of Refugio Road; 17.7 km N of Highway 101; Santa Ynez Mtns 545 Comment
  UCR258626  Urtica dioica Fred M. Roberts 2014-7-25 7892 Orange South Coast, SAN JOAQUIN HILLS: Upper Laguna Canyon, Laguna Lake 1 (Upper Laguna Lake), north basin, c.a. 5.1 kn ENE summit Signal Hill. Laguna Coast Wilderness Park 113 Comment
  RSA704932  Urtica urens Fred M. Roberts, David E. Bramlet 2004-4-21 6039 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy, Flagpole Meadow in upper Shady Canyon, 1.63 km NW Sycamore Gate, 1.18 km W of Cristianitos Road. 168 Comment
  RSA749360  Urtica urens Fred M. Roberts 2008-4-15 6899 Orange Lomas de Santiago: Loma Ridge, Lower Hicks Cyn., east ridge, Conservation Trail, 1.6 km ESE Rattlesnake Reservoir dam and 2.7 km WSW Bee Peak, Irvine Ranch Conservancy. 172 Comment
  UCSB47982  Urtica urens Roberts, Fred 1980-2-17 Orange Corner of Calle Arroyo and Calle Siega near San Juan Creek south of Highway 74, San Juan Capistrano 39 Comment
  UCD118096  Vaccinium ovatum Warren Roberts 1973-9-20 SCI 73 5 Santa Barbara Santa Cruz Island. Comment
  UCSB56678  Venegasia carpesioides Roberts, Jr., Fred 1984-1-29 Orange Laguna Niguel: Niguel Hill, 2.5km SE Aliso Peak; 1.7km ESE Bench Mark 133; along Pacific Island Road 133 Comment
  UCR209399  Veratrum californicum Fred M. Roberts, Scott E. Eliason 2007-8-23 6562 San Bernardino San Bernardino Mountains, ridge south of Big Bear Lake, Upper Metcalf Creek near Mill Creek Road, 0.6 km east of Boulder Group Camp and 1.1 km northwest of Merriman Meadows 2252 Comment
  RSA0042532  Verbascum virgatum Fred M. Roberts 2013-5-30 7777 Orange Lomas de Santiago: Santiago Creek wash, at Santiago Canyon Road bridge (south side), 0.3km W jct. Silverado and Santiago Canyon Roads. 299 Comment
  RSA542376  Verbascum virgatum Fred M. Roberts 1988-5-25 4581 Orange Rancho Mission Veijo: Lower Canada Chiquita, 2.0 kilometers SSE Medium Rancho Survey Marker. 91 Comment
  RSA0028030  Verbena bracteata Fred M. Roberts, Laura Cohen 2012-10-31 7711 Orange San Joaquin Hills: Laguna Lake 1 (Upper Laguna Lake), north end. Laguna Coast Wilderness Park, ca. 5.1 kilometers ENE Signal Hill. 113 Comment
  RSA599633  Verbena bracteata Fred M. Roberts Jr., Nigel Hancock 1995-5-25 4948 Orange Costa Mesa: Fairview Park, just west of end of Canyon Drive, 0.1 km W Canyon School. 24 Comment
  UCSB52440  Verbena gooddingii Roberts, Fred 1982-5-15 San Bernardino Mid Hills: Upper Macedonia Canyon, along Wild Horse Cyn. Rd., 4.3km SSW Mid Hills Campground 1607 Comment
  UCR247913  Verbena lasiostachys var. scabrida Fred M. Roberts 2012-7-18 7680 Orange SAN JOAQUIN HILLS: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus of Poppy Street and 2.1 km WNW summit of Pelican Hill 37 Comment
  RSA542347  Verbena tenuisecta Fred M. Roberts Jr. 1988-2-6 3775 Orange Newport beach: Balboa Island, Diamond Ave. south of Park Avenue 2 Comment
  RSA0008497  Verbesina dissita Fred M. Roberts, Leo Song 2002-8-1 5527 Orange San Joaquin Hills; Laguna Beach, South flank Temple Hill adjacent to 739 Nyes Place; 0.9km ENE Sugarloaf Pt. 164 Comment
  RSA716090  Verbesina dissita Fred M. Roberts 2006-7-27 6395 Orange San Joaquin Hills: Laguna Beach, Temple Hill, 731 Nyes Place, 1.0km NNE Golf Island. 174 Comment
  RSA717045  Verbesina encelioides subsp. exauriculata Fred M. Roberts, Michelle L. Balk 2005-10-1 6288 Orange Brea: northbound SR 57 at Lambert offramp, 0.5km S Lambert Road above railroad overpass. 126 Comment
  RSA731930  Veronica anagallis-aquatica Fred M. Roberts, Sandra Leatherman 2007-11-27 6680 Orange Yorba Linda: drainage channel on east side of Amberdale Dr. c.a. 0.3km S Fairmont Blvd. 118 Comment
  RSA708229  Veronica peregrina subsp. xalapensis Fred M. Roberts, Robert L. Allen, Chris Barnhill, Carol A. Roberts 2005-4-10 6161 Orange Costa Mesa: Fairview Park, west of north end of Canyon Drive, c.a. 0.2km WNW Marison Special Education Center (Canyon Sch. on topos). 24 Comment
  UCR162887  Veronica peregrina subsp. xalapensis Fred M. Roberts, D. E. Bramlet 2005-4-1 6145 Riverside Upper Salt Creek, W of Hemet, parcel between Devonshire and Florida, c. 0.2km N of Florida and 0.2km W San Diego Aquaduct; c. 2km NW Ryn Field 457 Comment
  RSA599586  Veronica peregrina subsp. xalapensis Fred M. Roberts 1995-4-21 4934 Orange Irvine: North of Quail Hill near jct of University and I-5 Hwy, 1.8 km NE of French Hill. 40 Comment
  RSA666091  Veronica peregrina var. xalapensis Fred M. Roberts, Michelle Lee, Kristen Szabo 2001-4-13 5431 Orange Rancho Mission Viejo: Chiquita Ridge, 0.3km WNW Median Rancho Survey Marker. PCR Vernal Pool 4. 226 Comment
  UCSB47579  Vicia americana Roberts, Fred 1980-4-3 Orange San Juan Canyon, Hwy. 74, bank across from entrance to Lower San Juan Picnic Ground, Santa Ana Mountains 410 Comment
  IRVC24911  Vicia americana var. americana Fred M. Roberts, G. A. Marsh 1986-6-6 2985 Orange Black Star Canyon, Black Star Canyon Rd., 2.7km by road below summit; 3.6km S Sierra Peak, Santa Ana Mountains 646 Comment
  UC1595728  Vicia americana var. americana Fred M. Roberts Jr. and Carol A. Roberts 1989-4-7 4263 Orange ca 0.4 km w Moulton Peak; Aliso-Wood Canyons Regional Park, Upper Wood Canyon 104 Comment
  RSA0011250  Vicia americana var. americana Fred M. Roberts, Carol A. Roberts 1989-4-7 4263 Orange Aliso-Wood Canyon Regional Park: Upper Wood Canyon, ca. 0.4 km W Moulton Peak. 104 Comment
  UCSB36140  Vicia benghalensis Roberts, Dar 1980-3-7 San Luis Obispo 1.5 miles NW Campus Cal Poly S.L.O., in Polly canyon 135 Comment
  SD197784  Vicia ludoviciana Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5781 San Diego Peninsular Range: San Ysidro Mtns.: Otay Mountain, head of canyon. Comment
  UCR128545  Vicia ludoviciana var. ludoviciana Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5781 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 427 Comment
  IRVC28062  Viguiera laciniata Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5768 San Diego Otay Mtn; head fo canyon ca. 2 miles NW of Otay Mtn Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 427 Comment
  RSA0014063  Viguiera laciniata Fred M. Roberts 2008-5-30 7016 Orange Lomas de Santiago: Santiago Creek wash, south of Irvine Mesa, 1.3 km SSE Silverado Sch., Irvine Ranch Conservancy. 328 Comment
  UCR128412  Viguiera laciniata Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5768 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 427 Comment
  UCR128514  Viguiera laciniata Fred M. Roberts, Andy Pigniolo, Kam Muri 2003-5-3 5702 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, south side near crest of ridge east of lower 'Butteweg Canyon' along the border trail, Tijuana River watershed 305 Comment
  UCR239643  Vinca major Fred M. Roberts 2012-5-9 7556 Orange Santa Ana Mountains, Lake Forest, along Serrano Creek hiking trail, 1.0 m south-southwest of intersection of Commercentre and Dimension Drives 171 Comment
  UCSB47978  Vinca major Roberts, Fred 1980-2-17 Orange Besdie road ditch wish Baccharis glutinosa. Along Camino Capistrano road 1.0 km south of Avery Parkway 48 Comment
  SEINET215137 Image available Viola douglasii E. Roberts 1964-3-24 5 Lake Ca. 5 miles north of Lakeport along State Highway 29 Comment
  RSA0014072  Viola pedunculata Fred M. Roberts 2008-5-28 7013 Orange Lomas de Santiago: Loma Ridge, central Limestone Cyn., 2.6 km ENE Bee Peak and 0.7 km SW Silverado Sch., Irvine Ranch Conservancy. 322 Comment
  RSA610235  Viola pedunculata Fred M. Roberts Jr. 1997-2-7 4977 Orange Rancho Misssion Viejo: Calif. Rte. 74 circa 6.8 km EInterstate 5 ( San Juan Capistrano) opposite the mouth of Canada Gobernadora, 1.2 km NE Viejo Survey Mark 88 Comment
  RSA542346  Viola pedunculata Fred M. Roberts Jr. 1987-4-3 3352 Orange Irvine: San Joaquin Hills, Shady Canyon, 2.5 km ENE Signal Peak 133 Comment
  RSA0121736  Vitis girdiana Fred M. Roberts, Michelle Balk, Robert Allen, Chris Barnhill 2004-6-19 6058 Orange Santa Ana Mtns: Holy Jim Cyn.: Holy Jim Trail, 3.5km SE summit of Santiago Peak. 610 Comment
  RSA584703  Vulpia microstachys var. pauciflora Fred M. Roberts, Carol A. Roberts 1989-5-11 4351 Orange Upper Gypsum Canyon, along ridge road, 5.6km SW Sierra Peak 472 Comment
  RSA775580  Vulpia microstachys var. pauciflora D. Roberts 1983-4-16 LP 390 Santa Barbara NE of the upper reservoir. La Purisima Mission State Historic Park, 2 km NE of Lompoc City Limit Comment
  RSA548873  Vulpia myuros var. hirsuta Fred M. Roberts 1989-3-22 4217 Orange Aliso-Wood Regional Park: Lower Wood Canyon, 3.6km SSE Moulton Peak. 38 Comment
  UCSB43425  Vulpia myuros var. hirsuta F. M. Roberts, Jr. 1982-3-22 458 Santa Barbara collected 0.3 km W along the Central Valley, in Santa Cruz Island UCSB Field Station - UCSB Field Station 80 Comment
  RSA773499  Vulpia octoflora Fred M. Roberts 1999-5-14 5219 Orange Peninsular Ranges; Santa Ana Mts.: Lomas de Santiago, Loma Ridge; Upper Limestone Canyon on slopes above Bolero Spring, 2.4 km NNW Bolero Lookout 451 Comment
  SD135156  Vulpia octoflora var. octoflora Fred M. Roberts 1993-4-24 4861 San Diego Carlsbad: Arroyo la Costa, just north of Mission Estancia Road, 5.2 km southwest [of] Lake San Marcos Dam Occasional on gentle, west-facing slope in disturbed sandy opening in chamise chaparral 73 Comment
  SD143278  Vulpia octoflora var. octoflora Fred M. Roberts 1997-4-11 5006 San Diego Carlbad:Upper Encinitas Creek watershed east of Rancho Santa Fe Road,Fieldstone Southeast,ca. 5.7km southwest Double Peak Occasional on gentle east-facing slope in open mosaic of coastal sage scrub and native grassland that had burned in October 1996. 88 Comment
  RSA725524  Washingtonia filifera Fred M. Roberts, Robert L. Allen 2007-9-28 6600 Orange Foothill Trabuco area: Upper Aliso Creek at SE corner of El Toro Road and Valle Vista Way, c.a. 1.8 km NE Upper Oso Reservoir. 308 Comment
  IRVC23171  Woodsia oregana Fred M. Roberts, Dar A. Roberts, C. Wilson 1982-5-16 629 San Bernardino Keystone Canyon; 0.4km ENE Keystone Spring and 1.3km N sagamore Mine Mojave Desert, New York Mountains 1856 Comment
  UCSB42760  Woodwardia fimbriata Roberts, Dar 1982-3-24 Santa Barbara Lady's Harbor drainage; 1.3km N by NW of Devil's Peak, Santa Cruz Island. Comment
  UCSB42761  Woodwardia fimbriata Roberts, Dar 1982-3-24 Santa Barbara Lady's Harbor drainage; 1.3km N by NW of Devil's Peak, Santa Cruz Island. Comment
  RSA703093  Xanthium strumarium Fred M. Roberts, Art Davenport 2003-9-11 6003 Orange Rancho Mission Viejo: Donna O'Neill Land Conservancy. Cristianitos Cyn., 0.79 km N Sycamore Gate 0.23 km w of Crisianitos Road. 126 Comment
  RSA708732  Xanthium strumarium Fred M. Roberts, Robert L. Allen, Chris M. Barnhill 2004-8-21 6116 Orange Santa Ana Mountains; Casper Wilderness Park, San Juan Cyn., Old San Juan Hot Springs, ca. 0.4 km SW San Juan Ranger Station, N of SR 74. 214 Comment
  UC1548582  Xanthium strumarium D. A. Roberts 1983-7-23 FS 93 Mono ne end Fish Slough (n end of Owen Valley); , Rocked-in-Spring Comment
  UCSB52428  Xanthium strumarium Roberts, Jr., Fred 1982-9-15 Orange Dana Point; hills, 1.0 km. N Dana Hills High School; 1.9 km. NE Bench Mark 150 90 Comment
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Dec 12 2018
  UCR128416  Xylococcus bicolor Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5799 San Diego Peninsular Range, San Ysidro Mountains, Otay Mountain, head of canyon c. 2 mi. airline NW of Otay Mt. peak, c. 0.4 mi. WSW of peak 2242 470 Comment
  RSA649011  Xylorhiza tortifolia Jeni L. Roberts, Christine Koller 1991-4-29 7 San Bernardino Within Victorville City Limits. On National Trails Highway, 2.5 miles north of I 15. (100') ? east of the highway, 20' fromt he bank of the Mojave River. Comment
  IRVC28488  Yucca whipplei Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5793 San Diego Otay Mtn; head of cyn 2 miles NW of Otay Peak, ca. 0.4 mile WSW of peak 2242. Peninsular Ranges, San Ysidro Mountains 470 Comment
  RSA691030  Yucca whipplei var. whipplei Fred M. Roberts, Mike White, D. Flietner 2003-5-4 5793 San Diego San Ysidro Mtns.: Otay Mountain, head of canyon ca. 2 mi. airline NW of Otay Mt. peak, ca. 0.4 mi. WSW of peak 2242. 470 Comment
  RSA362300  Zannichellia palustris Fred M. Roberts, E. Fisher 1985-6-17 s.n. Orange O neill Regional Park, Arroyo Trabuco, Well, 1.7km NNE jct Arroyo Trabuco and Tijeras Canyon. 180 Comment
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Feb 22 2019
  RSA539343  Zannichellia palustris Fred M. Roberts 1987-8-6 3584 Orange Irvine: El Modena Irvine Channel at Myford crossing 1.5km E Irvine Siding. 18 Comment
  UCSB47999  Zeltnera venusta Roberts, Fred 1980-6-29 Orange Santa Ana Mtns; Viejo Canyon; 0.4km N Calif Rte 74; 2.2km ENE San Juan Guard Station 103 Comment
  RSA542515  Zigadenus fremontii Fred M. Roberts 1987-4-13 3365 Orange Laguna Beach: Goff Ridge, south of Nyes Place Road, 0.9 kilometers NNE Goff Island. 169 Comment
  RSA594893  Zigadenus fremontii Fred M. Roberts, Sandy Leatherman, Brian Leatherman 1994-4-24 4906 Orange Santa Ana Mountains: San Juan Canyon, south side of CA route 74, 1.2 kilometers SW Lower San Juan Picnic Ground. 390 Comment



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