Search Results — 2000 specimen records retrieved (1661 records with coordinates)
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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/consortium/).
 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
  CAS-BOT-BC100331  Blepharizonia plumosa R. E. Preston 1998-10-13 1189 Alameda Corral Hollow, ca. 0.3 mi ESE of Tesla (site). (Midway 7.5' quad). 304 Comment
  CAS-BOT-BC288867  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-3 1168 Alameda Fremont, SW corner of intersection Cushing Parkway and Fremont Blvd 2 Comment
  JEPS106435 Image available Castilleja Robert E. Preston 2003-5-22 2142 Alameda ca 2.8 mi SE Sunol; Maguire Peaks 292 Comment
  JEPS95213  Centromadia pungens subsp. pungens R. E. Preston 1998-10-9 1183 Alameda North Livermore, 0.3 mi W of intersection of Hartford Ave. and Lorraine St. 155 Comment
  JEPS95214  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-9 1181 Alameda North Livermore, 0.3 mi W of intersection of Hartford Ave. and Lorraine St. 155 Comment
  JEPS95216  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-6 1175 Alameda Between Pleasanton and Livermore, in field on E side of Camino Tassajara, 0.5-0.8 mi N of Interstate 580. 109 Comment
  JEPS95223  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-4 1170 Alameda Fremont, in vacant lot on SW corner of Auto Mall Parkway and Technology Drive 6 Comment
  JEPS99038  Atriplex minuscula Robert E. Preston 1992-7-15 618 Alameda Livermore, in field on E side of Vasco Rd, 1.2 mi N of I-580. 161 Comment
Read comments Sep 3 2012
  UCD130143  Centromadia parryi subsp. congdonii Robert E. Preston 1998-10-6 1176 Alameda Between Pleasanton and Livermore, in field between Fallon Road and Croak Road. 108 Comment
  UCD130144  Centromadia parryi subsp. congdonii Robert E. Preston 1998-10-6 1177 Alameda north Livermore, in fields along Hartford Ave, east of North Livermore Road. 158 Comment
  UCD139444  Calochortus argillosus Robert E. Preston 1998-6-30 1157 Alameda Corral Hollow, 0.5 mi NW of Tesla (site). 457 Comment
  UCD148235  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-3-22 2896 Alameda Mission Hills, 0.4 mi SW of Trailhead at Ohlone College. 279 Comment
  UCD163055  Plagiobothrys acanthocarpus Robert E. Preston 2014-4-11 2952 Alameda 1 mi NNE of Patterson Pass summit. 331 Comment
  UCD163056  Hesperevax sparsiflora Robert E. Preston 2014-4-15 2953 Alameda 1.7 mi ENE of Patterson Pass summit. 379 Comment
  UCD163097  Androsace elongata subsp. acuta Robert E. Preston 2014-4-15 2954 Alameda 1.6 mi ENE of Patterson Pass summit. 391 Comment
  UCD163352  Eriogonum viridescens Robert E. Preston 2013-12-2 2943 Alameda 1.1 mi NE of Patterson Pass summit. 237 Comment
  UCD163356  Claytonia exigua Robert E. Preston 2014-4-11 2951 Alameda 1.1 mi ENE of Patterson Pass summit. 437 Comment
  UCD163358  Plagiobothrys acanthocarpus Robert E. Preston 2014-4-15 2957 Alameda 0.9 mi NNE of Patterson Pass summit. 313 Comment
  UCD163371  Berula erecta Robert E. Preston 2014-10-8 2993 Alameda 1.5 mi NE of Patterson Pass summit. 245 Comment
  UCD163373  Eriogonum nudum Robert E. Preston 2014-10-8 2994 Alameda 1.1 mi ENE of Patterson Pass summit. 420 Comment
  UCD163430  Berula erecta Robert E. Preston 2014-10-8 2993 Alameda 1.5 mi NE of Patterson Pass summit. 245 Comment
  UCD51118  Arctostaphylos glauca Robert E. Preston 1998-4-21 1098 Alameda Corral Hollow, Tesla (site). 304 Comment
  UCD77252  Calochortus argillosus Robert E. Preston 1998-6-30 1157 Alameda Corral Hollow, 0.5 mi NW of Tesla (site). 457 Comment
  UCD77300  Acanthomintha lanceolata Robert E. Preston 1998-4-20 1096 Alameda Corral Hollow, 1 mi S of Tesla (site). 533 Comment
  UCD77423  Blepharizonia plumosa Robert E. Preston 1998-10-13 1188 Alameda Corral Hollow, ca. 0.5 mi SSE of Tesla (site) 502 Comment
  UCD77511  Centromadia parryi subsp. congdonii Robert E. Preston 1997-10-14 1054 Alameda Camp Parks. 100 Comment
  UCD77667  Eriogonum nudum Robert E. Preston 1998-10-13 1187 Alameda Corral Hollow, ca. 0.7 mi SSE of Tesla (site) 548 Comment
  UCD77682  California macrophylla Robert E. Preston 2002-4-12 1783 Alameda Lawrence Livermore National Laboratory, Site 300 419 Comment
  UCD77722  Eschscholzia rhombipetala Robert E. Preston 1997-5-6 1028 Alameda Lawrence Livermore National Laboratory, Site 300 259 Comment
  UCD77731  Fritillaria agrestis Robert E. Preston 1998-3-27 1089 Alameda Corral Hollow, 0.5 mi NW of Tesla (site) 457 Comment
  UCD77750  Helianthella castanea Robert E. Preston 2003-5-23 2145 Alameda Alameda Creek Watershed, ca. 2 mi SE of San Antonio Reservoir, at N end of Wauhab Ridge 377 Comment
  UCD77761  Hesperevax caulescens Robert E. Preston 2002-3-29 1780 Alameda Lawrence Livermore National Laboratory, Site 300. 435 Comment
  UCD77994  Senecio aphanactis Robert E. Preston 1998-4-21 1097 Alameda Corral Hollow, 0.5 mi NW of Tesla (site). 457 Comment
  UCD78026  Streptanthus glandulosus subsp. glandulosus Robert E. Preston 2003-5-27 2148 Alameda Alameda Creek Watershed, ca. 0.3 mi N of Alameda Creek, ca. 0.8 mi N of its confluence with Calaveras Creek, E of Cerro Este Trail 364 Comment
  UCD78027  Streptanthus glandulosus subsp. glandulosus Robert E. Preston 2003-5-22 2144 Alameda Alameda Creek Watershed, on N side of Leyden Creek, between Calaveras Rd and Geary Rd 184 Comment
  UCD78030  Streptanthus glandulosus subsp. glandulosus Robert E. Preston 2003-5-22 2143 Alameda East side of Calaveras Reservoir, ca. 0.5 mi S of the dam 278 Comment
  UCD78104  Dittrichia graveolens Robert E. Preston 1997-10-10 1052 Alameda Camp Parks 100 Comment
  UCD78135  Rhamnus alaternus Robert E. Preston 2008-2-27 2584 Alameda Union City, in remnant channel of Alameda Creek, between Osprey Dr and Alameda Flood Control Channel 12 Comment
  UCD78136  Fumaria officinalis Robert E. Preston 2009-2-27 2585 Alameda Union City, in remnant channel of Alameda Creek, between Osprey Dr and Alameda Flood Control Channel 12 Comment
  UCD78166  Rapistrum rugosum Robert E. Preston 2008-4-22 2618 Alameda Livermore, 0.25 mi E of Vasco Rd, between Northfront Rd and I-580 164 Comment
  UCD78208  Centromadia fitchii R. E. Preston 2006-9-13 2408 Alameda Altamont Pass, on E side of Dyer Rd, 0.8 mi N of jct with Altamont Pass Rd. 230 Comment
  UCD97475  Atriplex joaquinana Robert E. Preston 1992-7-14 617 Alameda Livermore; in field on east side of Vasco Road, 1.2 miles north of I-580. 161 Comment
  UCD97476  Atriplex joaquinana Robert E. Preston 1993-7-16 625 Alameda Pleasanton, between Interstate 580 and Arroyo Las Positas. 106 Comment
  CAS-BOT-BC328150  Senecio aphanactis Robert E. Preston 1998-4-21 1097 Alameda Corral Hollow 0.5 mile northwest of Tesla (site) 457 Comment
  JEPS95215  Centromadia R. E. Preston 1998-10-9 1182 Alameda North Livermore, 0.3 mi W of intersection of Hartford Ave. and Lorraine St. 155 Comment
  UCD101558  Eriogonum wrightii var. subscaposum Robert E. Preston 1996-9-27 1009 Alameda W side of Tesla Road, 0.65 mile west of summit. 327 Comment
  UCD129615  Blepharizonia plumosa Robert E. Preston 1996-9-27 1010 Alameda S side of Tesla Road, 0.2 miles northwest of summit. 320 Comment
  UCD129616  Blepharizonia plumosa Robert E. Preston 1996-9-27 1011 Alameda west of Midway Road, 0.1 to 0.5 miles south of Patterson Pass Road. 112 Comment
  UCD131232  Dittrichia graveolens Robert E. Preston 1996-11-29 1014 Alameda along Niles Canyon Road, around 0.4 mile east of Palomares Road. Comment
  UCD133239  Holocarpha virgata Robert E. Preston 1993-8-27 630 Alameda Livermore, in open pasture west of Laughlin Road, around 0.5 mile north of Interstate 80. 167 Comment
  UCD114369  Boechera lyallii Robert E. Preston 1987-8-24 572 Alpine N side of Carson Pass. 2651 Comment
  UCD114575  Caulanthus major Robert E. Preston 1987-8-25 573 Alpine N side of Highway 89, 0.9 mile W of Monitor Pass. 2487 Comment
  UCD116307  Streptanthus tortuosus Robert E. Preston 1984-6-30 472 Alpine 4 km east of Caples Lake, south side of Carson Pass on Highway 88. 2630 Comment
  UCD163431  Festuca viridula Robert E. Preston 2015-7-29 3012 Alpine Open coniferous forest on the east side of Twin Lake. 2492 Comment
  UCD163433  Luzula subcongesta Robert E. Preston 2015-7-29 3014 Alpine Open coniferous forest on the east side of Twin Lake. 2492 Comment
  UCD163435  Poa bolanderi Robert E. Preston 2015-7-29 3016 Alpine Open coniferous forest on the east side of Twin Lake. 2492 Comment
  UCD163436  Carex specifica Robert E. Preston 2015-7-29 3017 Alpine Open coniferous forest on the east side of Twin Lake. 2492 Comment
  UCD163437  Carex preslii Robert E. Preston 2015-7-29 3018 Alpine Open coniferous forest on the east side of Twin Lake. 2492 Comment
  UCD163440  Carex nervina Robert E. Preston 2015-7-29 3021 Alpine Open coniferous forest on the north side of Twin Lake. 2490 Comment
  UCD163442  Trisetum projectum Robert E. Preston 2015-7-29 3022 Alpine Open coniferous forest on the north side of Twin Lake. 2490 Comment
  UCD163444  Elymus glaucus Robert E. Preston 2015-7-29 3023 Alpine Open coniferous forest on the north side of Twin Lake. 2490 Comment
  UCD163446  Cinna latifolia Robert E. Preston 2015-7-29 3024 Alpine Open coniferous forest on the north side of Twin Lake. 2490 Comment
  UCD163449  Agrostis variabilis Robert E. Preston 2015-7-29 3027 Alpine Open coniferous on the west side of Twin Lake. 2480 Comment
  UCD163452  Hieracium triste Robert E. Preston 2015-7-29 3028 Alpine Open Coniferous forest on the west side of Twin Lake. 2480 Comment
  UCD163453  Calamagrostis canadensis Robert E. Preston 2015-7-29 3029 Alpine Open coniferous forest on the south side of Twin Lake. 2489 Comment
  UCD163455  Achnatherum nelsonii subsp. dorei Robert E. Preston 2015-7-29 3030 Alpine Open coniferous forest on the south side of Twin Lake. 2489 Comment
  UCD163456  Trisetum wolfii Robert E. Preston 2015-7-29 3031 Alpine Open coniferous forest on the south side of Twin Lake. 2489 Comment
  UCD114449  Boechera platysperma Robert E. Preston 1984-8-29 504 Alpine along the ridgetop on the s side of Red Lake Peak. 3048 Comment
  UCD114472  Boechera retrofracta Robert E. Preston 1986-6-26 543 Alpine ca. 1/2 mi nw of Carson Pass. 2712 Comment
  UCD114491  Boechera suffrutescens Robert E. Preston 1986-8-26 555 Alpine NE of Caples Lake. 2499 Comment
  UCD148238  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-3-24 2899 Amador Ca. 5.5 mi W of Ione, along Hwy 104. 93 Comment
  UCD77132  Brodiaea nana Robert E. Preston 2003-5-9 2125 Amador Ca. 1.1 mi N of Indian Hill, along Ione Rd, N of its jct with Hwy 104. 70 Comment
  UCD77135  Brodiaea nana Robert E. Preston 2003-5-9 2127 Amador Ca. 1.75 mi NW of Ione, along Irish Hill Rd, 0.15 mi N of Hwy 104. 74 Comment
  UCD77456  Cardamine hirsuta Robert E. Preston 2006-2-23 2371 Amador 0.3 mi N of Buena Vista 103 Comment
  UCD78051  Trifolium grayi Robert E. Preston 2003-5-9 2126 Amador Ca. 1.1 miles N of Indian Hill, along Ione Road, N of its jct with Highway 104. 70 Comment
  CAS-BOT-BC87030  Streptanthus drepanoides R. E. Preston 1982-4-22 254 Butte Ca. 0.6 mile ESE of Kunkle Reservoir, on west Branch Feather River arm of Lake Oroville, ca. 4.5 mile SE of Paradise. 280 Comment
  CAS-BOT-BC87031  Streptanthus drepanoides R. E. Preston 1982-6-2 293 Butte Ca. 0.6 mile ESE of Kunkle Reservoir, on west Branch Feather River arm of Lake Oroville, ca. 4.5 mile SE of Paradise. 280 Comment
  CHSC33100  Rorippa palustris var. occidentalis R. E. Preston 1981-4-20 53 Butte On bank of irrigation ditch, e side of Aguas Frias Rd., ca. 100 m s of Butte Cr., ca. 22.5 km s of Chico. 29 Comment
  CHSC33167  Euphorbia lathyris R. E. Preston 1981-5-6 65 Butte At 728 W. First Ave., Chico. Comment
  CHSC33168  Brassica nigra R. E. Preston 1981-5-27 71 Butte Roadside, on n side of Sacramento Ave., ca. 0.5 km w of Meridian Rd., ca. 8 km w of Chico. 40 Comment
  CHSC33169  Cardamine pachystigma var. dissectifolia R. E. Preston 1981-2-28 46 Butte 100 m w of Little Butte Cr., ca. 2.4 km n of Magalia. 717 Comment
  CHSC33170  Lepidium strictum R. E. Preston 1981-5-3 64 Butte At curbside, in front of St. John the Baptist Church, Chestnut St. between 4th and 5th Sts., Chico. Comment
  CHSC33177  Streptanthus polygaloides R. E. Preston; L. E. Preston 1981-5-25 70 Butte Ca. 320 m n of the jct of the Skyway and Coutelenc Rd., Magalia. 700 Comment
  CHSC33181  Brassica rapa R. E. Preston 1981-1-20 34 Butte On n bank of Western Canal, ca. 30 m e of Aguas Frias Rd., ca. 18.5 km s of Chico. Comment
  CHSC33182  Sinapis arvensis R. E. Preston 1981-1-20 32 Butte Along irrigation ditch on w side of Chico-Butte City Hwy, ca. 2.3 km s of Ord Ferry Rd., ca. 14 km ssw of Chico. Comment
  CHSC33184  Hirschfeldia incana R. E. Preston 1981-5-27 72 Butte On n shoulder of Sacramento Ave., ca. 0.5 km w of Meridian Rd., ca. 8 km w of Chico. 40 Comment
  CHSC33185  Hirschfeldia incana R. E. Preston 1981-6-1 74 Butte Roadside; at the jct of Hwy 32 and Humboldt Rd., ca. 8 km e of Chico. 293 Comment
  CHSC33187  Streptanthus tortuosus R. E. Preston 1981-6-2 79 Butte Ca. 400 m w of Butte/Plumas county line, on s side of Hwy 70, ca. 41 km nne of Oroville. 488 Comment
  CHSC33188  Turritis glabra R. E. Preston 1981-6-2 82 Butte On e shoulder of Hwy 70, ca. 400 m e of Cresta power house, ca. 37 km nne of Oroville. 464 Comment
  CHSC33214  Malvella leprosa R. E. Preston 1981-6-19 96 Butte In and along road, atop levee; ca. 0.8 km s of Headquarters, Grey Lodge State Wildlife Area, ca. 14.5 km ssw of Gridley. 20 Comment
  CHSC33215  Heliotropium curassavicum R. E. Preston 1981-6-19 98 Butte Gray Lodge State Wildlife Area, ca. 14.5 km ssw of Gridley. At side of road near edge of water, on levee, ca. 100 m w of Headquarters. 20 Comment
  CHSC33224  Sisymbrium orientale R. E. Preston 1981-6-2 81 Butte At roadside. On s side of Hwy 70 across from power company rest area, ca. 38 km nne of Oroville. 488 Comment
  CHSC33225  Streptanthus longisiliquus R. E. Preston 1981-6-11 83 Butte On Carpenter Ridge, ca. 3.2 km sw of Butte Meadows. 1340 Comment
  CHSC33227  Cardamine breweri R. E. Preston 1981-6-17 90 Butte Side channel of Butte Creek; ca. 3.2 km ne of Butte Meadows, near Cherry Hill. 1415 Comment
  CHSC33228  Boechera rectissima R. E. Preston 1981-6-17 92 Butte Ca. 30 m e of Humboldt Rd, ca. 0.8 km w of Humboldt Peak and 3.5 km ne of Jonesville. 1967 Comment
  CHSC33402  Populus tremuloides R. E. Preston 1981-7-9 21 Butte Ca. 75 m of West Branch of Feather River, ca. 0.5 km s of Snag Lake, ca. 4.8 km sse of Jonesville. 1708 Comment
  CHSC33403  Pyrola dentata R. E. Preston 1981-7-8 24 Butte Ca. 0.8 km e of Humboldt Peak, ca. 5.5 km nne of Jonesville. 1952 Comment
  CHSC33404  Eriophyllum lanatum var. grandiflorum R. E. Preston 1981-7-8 25 Butte Scott's John Creek, at Butte-Plumas County border, ca. 5.5 km ne of Jonesville. 1930 Comment
  CHSC33405  Streptanthus longisiliquus R. E. Preston 1981-7-8 100 Butte On Carpenter Ridge, ca. 3.2 km sw of Butte Meadows. 1340 Comment
  CHSC33406  Boechera platysperma R. E. Preston 1981-7-8 101 Butte 10 m w of Scotts John Creek, ca. 1.0 km e of Humboldt Peak. 1928 Comment
  CHSC33407  Boechera platysperma R. E. Preston 1981-7-8 103 Butte Ca. 15 m e of Humboldt Rd, ca. 4.2 km nne of Jonesville. 1970 Comment
  CHSC33467  Descurainia incana R. E. Preston 1981-7-14 109 Butte Ca. 7.5 km ese of Jonesville. In meadow. 1950 Comment
  CHSC33468  Boechera platysperma R. E. Preston 1981-7-14 110 Butte Ridgetop. Ca. 4.8 km e of Jonesville. 2050 Comment
  CHSC33516  Cynoglossum occidentale R. Preston; R. Banchero, R. A. Schlising 1981-7-14 4151 Butte N part of county, W of Humbug Summit. 1828 Comment
  CHSC33633  Boechera platysperma R. E. Preston; R. A. Schlising, R. Banchero, D. Burk 1981-7-21 112 Butte N ridge of Snow Mtn, ca. 7.2 km se of Jonesville. 2050 Comment
  CHSC33634  Anemone occidentalis R. E. Preston; R. A. Schlising, R. Banchero, D. Burk 1981-7-21 113 Butte Snow Mtn, ca. 7.2 km se of Jonesville. 2050 Comment
  CHSC33635  Sidalcea glaucescens R. E. Preston 1981-7-8 116 Butte 10 m w of Scotts John Creek, e of Humbolt Peak, ca. 6 km ne of Jonesville. 1930 Comment
  CHSC33663  Sambucus racemosa var. microbotrys R. Preston; D. Burk, R. Banchero, R. Schlising 1981-7-21 4163 Butte NE part of county, on N side of Snow Mountain ridge. 2042 Comment
  CHSC33666  Goodyera oblongifolia R. E. Preston 1981-7-28 114 Butte Ca. 5.0 km se of Butte Meadows. 1590 Comment
  CHSC33825  Plantago major var. scopulorum R. E. Preston 1981-8-5 121 Butte Wet gravel bar, n bank of Chico Creek; ca. 1 3/4 mi nne of the boundary of Upper Bidwell Park at Road's end, Chico. 228 Comment
  CHSC33850  Limnanthes douglasii subsp. rosea R. E. Preston 1979-4-19 14 Butte Northernmost Butte County. Ditches along Cana-Pine Creek Road nw of Singer Creek. 56 Comment
  CHSC34446  Marah fabacea var. agrestis R. E. Preston 1979-4-19 15 Butte 75 yds nw of Singer Creek, northernmost Butte County. 56 Comment
  CHSC34448  Delphinium nudicaule R. E. Preston 1982-2-4 163 Butte On cliff faces, s rim of Butte Creek Canyon above Honey Run Covered Bridge, ca. 7.5 mi e of Chico. 304 Comment
  CHSC34521  Cardamine californica var. californica R. E. Preston 1981-2-6 37 Butte At base of cliff on s side of Butte Creek canyon, at Covered Bridge, ca. 12 km e of Chico. 275 Comment
  CHSC34522  Cardamine pachystigma var. dissectifolia R. E. Preston 1981-2-28 45 Butte Ca. 50 m e of Coutelenc Rd, ca. 320 m n of its jct with the Skyway, Magalia. 700 Comment
  CHSC34523  Cardamine pachystigma var. dissectifolia R. E. Preston 1981-3-27 49 Butte Ca. 50 m e of Coutelenc Rd, 320 m n of its jct with the Skyway, Magalia. 700 Comment
  CHSC34524  Cardamine pachystigma R. E. Preston 1981-4-11 52 Butte Roadcut, on s side of Forbestown Reservoir, ca. 400 m e of diversion dam, ca. 5.8 km ne of Forbestown. 580 Comment
  CHSC34526  Lepidium nitidum R. E. Preston 1982-2-4 159 Butte Top of cliffs, s rim of Butte Creek Canyon above Honeyrun Covered Bridge, ca. 7.5 mi e of Chico. 289 Comment
  CHSC34528  Cynoglossum grande R. E. Preston 1982-2-11 164 Butte W facing slope of Clements Ridge, ca. 3.5 mi s of Paradise. 304 Comment
  CHSC34529  Lepidium nitidum R. E. Preston 1982-2-18 165 Butte Between Hwy and pasture. W side of Hwy 99 between Hamilton-Nord-Cana Hwy and Broyles Rd; ca. 11 mi nw of downtown Chico. 57 Comment
  CHSC34531  Micranthes integrifolia R. E. Preston 1982-2-18 168 Butte Bank on s side of Anderson Fork of Rock Creek. Ca. 7.5 mi nne of downtown Chico. 182 Comment
  CHSC34532  Lepidium nitidum R. E. Preston 1982-2-18 170 Butte Slope above s bank of Anderson Fork of Rock Creek. Ca. 7.5 mi nne of downtown Chico. 182 Comment
  CHSC34534  Capsella bursa-pastoris R. E. Preston 1982-2-18 172 Butte At base of cliffs, n side of Anderson Fork of Rock Creek. Ca. 7.5 mi nne of downtown Chico. 213 Comment
  CHSC34535  Thysanocarpus curvipes R. E. Preston 1982-2-18 174 Butte Bank at base of cliffs, n side of Anderson Fork of Rock Creek. Ca. 7.5 mi nne of downtown Chico. 213 Comment
  CHSC34537  Draba verna var. aestivalis R. E. Preston 1982-2-21 177 Butte N facing slope of small side branch of Hamlin Canyon. Ca. 10 mi ese of downtown Chico. 243 Comment
  CHSC34563  Boechera suffrutescens R. E. Preston 1981-7-8 102 Butte On n slope of Humboldt Peak. Butte/Plumas Co. boundary. 1545 Comment
  CHSC34565  Raphanus raphanistrum R. E. Preston; L. E. Preston 1982-1-1 157 Butte In almond orchard, e side of River Rd. ca. 1 mi s of Sacramento Ave.; Chico Landing site, ca. 5 mi w of Chico. Comment
  CHSC34594  Brassica nigra R. E. Preston 1981-10-23 151 Butte Between almond orchard and Sacramento Ave., ca. 0.5 km w of Meridian Rd, ca. 8 km w of Chico. 40 Comment
  CHSC34595  Brassica nigra R. E. Preston 1981-10-23 151 Butte Between almond orchard and Sacramento Ave., ca. 0.5 km w of Meridian Rd, ca. 8 km w of Chico. 40 Comment
  CHSC35005  Thysanocarpus curvipes var. elegans R. E. Preston 1979-4-22 19 Butte On bank of small creek, on North Table Mountain. N of Cherokee Rd, 5 mi n of Oroville. 365 Comment
  CHSC35006  Draba verna var. aestivalis R. E. Preston 1982-2-25 178 Butte 20 ft s of Humboldt Rd, ca. 1/4 mi e of its jct with Bruce Rd; ca. 3 mi e of downtown Chico. 87 Comment
  CHSC35007  Cardamine oligosperma R. E. Preston 1982-2-25 179 Butte 20 ft s of Humboldt Rd, ca. 1/4 mi e of its jct with Bruce Rd; ca. 3 mi e of downtown Chico. 87 Comment
  CHSC35008  Thysanocarpus curvipes var. elegans R. E. Preston 1982-2-25 180 Butte Ravine of Chico Creek at former diversion dam, Upper Bidwell Park; ca. 5.5 mi ene of downtown Chico. 91 Comment
  CHSC35009  Brassica rapa R. E. Preston 1982-3-2 181 Butte Old County Dump site, ne corner of jct of Humboldt Rd and Bruce Rd; ca. 3 mi e of downtown Chico. 86 Comment
  CHSC35010  Draba verna var. verna R. E. Preston 1982-3-4 183 Butte N. Table Mtn., 20 ft e of Cherokee Rd. 402 Comment
  CHSC35011  Athysanus pusillus R. E. Preston 1982-3-4 184 Butte N. Table Mtn., 20 ft e of Cherokee Rd. 402 Comment
  CHSC35012  Lepidium strictum R. E. Preston 1982-3-6 185 Butte Ca. 100 yds n of Horseshoe Lake, Upper Bidwell Park, Chico. 106 Comment
  CHSC35013  Draba verna var. verna R. E. Preston 1982-3-6 186 Butte Dirt road, ridge on s side of canyon of Sycamore Creek; ca. 300 yds n of boundary of Upper Bidwell Park n of Horseshoe Lake, Chico. 182 Comment
  CHSC35015  Draba verna var. aestivalis R. E. Preston 1982-3-20 192 Butte Along trail to Bear Ranch Creek falls, at Hwy 70, ca. 22 mi nne of Oroville. 463 Comment
  CHSC35016  Draba verna var. verna R. E. Preston 1982-3-20 193 Butte Roadside, Hwy 70 at Bear Ranch Creek; ca. 22 mi nne of Oroville. 457 Comment
  CHSC35018  Draba verna var. verna R. E. Preston 1982-3-20 195 Butte Ca. 50 ft n of Humboldt Rd, ca. 3.3 mi e of downtown Chico. 106 Comment
  CHSC35020  Thysanocarpus curvipes R. E. Preston 1982-3-25 199 Butte W side of Hwy 70 at jct with Yankee Hill Rd, ca. 13 mi n of Oroville. 518 Comment
  CHSC35021  Boechera arcuata R. E. Preston 1982-3-25 201 Butte Ca. 1.5 mi e of Pulga, n side of Feather River canyon. 670 Comment
  CHSC35022  Thysanocarpus curvipes R. E. Preston 1982-3-25 202 Butte Along dirt road on n side of Feather River canyon, ca. 1/2 mi e of Pulga. 487 Comment
  CHSC35023  Lepidium strictum R. E. Preston 1982-3-27 204 Butte At roadside; W. First Ave between Warner and Cedar Sts, Chico. Comment
  CHSC35025  Capsella bursa-pastoris R. E. Preston 1982-3-27 206 Butte Along dirt road; Campbell Hills, n of Thermalito Afterbay, Oroville. In saddle. 121 Comment
  CHSC35026  Lepidium strictum R. E. Preston 1982-3-27 210 Butte Center of dirt road; s border of State Shooting Area, ca. 2 mi s of Oroville Municipal Airport. 45 Comment
  CHSC35027  Thysanocarpus radians R. E. Preston 1982-3-27 211 Butte S boundary of State Park Shooting Area, ca. 2 mi s of Oroville Municipal Airport. 45 Comment
  CHSC35083  Hackelia micrantha Preston; Burk, Banchero, R. A. Schlising 1981-7-21 4162 Butte NE Butte County, on E slopes of Snow Mt. 2042 Comment
  CHSC35103  Allophyllum integrifolium R. Preston; R. Banchero, R. Schlising 1981-7-14 4146 Butte N part of county, ca 0.3 mi SW of Humbug Summit. 1981 Comment
  CHSC35116  Rorippa nasturtium-aquaticum R. E. Preston 1981-8-31 144 Butte In spring; ca. 15 m s of park road, ca. 150 m w of Salmon Hole parking lot, Upper Bidwell Park, Chico. 125 Comment
  CHSC35627  Blennosperma nanum R. E. Preston 1982-2-18 166 Butte Field on S side of Keefer Lane, ca. 1 mi W of Cohasset Hwy; ca. 6 mi N of downtown Chico. 97 Comment
  CHSC35628  Pseudobahia heermannii R. E. Preston 1982-2-21 176 Butte N side of Hamlin Canyon. Ca. 10 mi ese of downtown Chico. 274 Comment
  CHSC35629  Lasthenia platycarpha R. E. Preston 1982-3-22 196 B Butte Ca. 50 ft e of Hwy 149, ca. 3/4 mi e of Hwy 99, ca. 10.5 mi nw of Oroville. 60 Comment
  CHSC35630  Poa secunda subsp. secunda R. E. Preston 1982-3-24 197 Butte Ca. 50 ft n of the Skyway, 1/4 mi e of Hwy 99, Chico. At edges of vernal pools. Area advertised for commercial development. 67 Comment
  CHSC35631  Layia fremontii R. E. Preston 1982-3-27 212 Butte SE corner of int Larkin Rd and Oro Dam Blvd, Oroville. 51 Comment
  CHSC35632  Briza minor R. E. Preston 1982-3-27 213 Butte SE corner of Larkin Rd and Oro Dam Blve int, Oroville. 51 Comment
  CHSC35633  Lepidium dictyotum R. E. Preston 1982-4-4 216 Butte Dirt road on dike, Gray Lodge State Wildlife Area, ca. 0.3 mi w of Headquarters. 20 Comment
  CHSC35641  Lepidium strictum R. E. Preston 1982-4-7 225 Butte At edge of almond orchard; nw corner jct of Dayton-Durham Rd and Roble Rd, Durham. 48 Comment
  CHSC35642  Capsella bursa-pastoris R. E. Preston 1982-4-7 226 Butte At edge of almond orchard; nw corner jct Dayton-Durham Rd and Roble Rd, Durham. 48 Comment
  CHSC35643  Rorippa palustris var. occidentalis R. E. Preston 1982-4-7 227 Butte On n bank of Western Canal; at its jct with Aguas Frias Rd, ca. 12 mi s of Chico. 32 Comment
  CHSC35644  Pseudognaphalium luteoalbum R. E. Preston 1982-4-7 228 Butte On n bank of Western Canal, at jct with Aguas Frias Rd, ca. 12 mi s of Chico. 32 Comment
  CHSC35646  Rorippa palustris var. occidentalis R. E. Preston 1982-4-7 230 Butte On bank of irrigation ditch; along Main Ditch B, ca. 1 1/4 mi e of Richvale. 32 Comment
  CHSC35648  Rorippa palustris var. occidentalis R. E. Preston 1982-4-7 232 Butte At bottom of irrigation ditch, on s side of Biggs-Princeton Hwy, 2.4 mi w of Biggs. 24 Comment
  CHSC35649  Alopecurus carolinianus R. E. Preston 1982-4-7 233 Butte On banks of irrigation ditch which crosses Biggs-Princeton Hwy ca. 2.4 mi w of Biggs. 24 Comment
  CHSC35650  Boechera breweri R. E. Preston 1982-4-7 235 Butte Cape Horn, ca. 4 mi sw of Paradise. On cliff. 335 Comment
  CHSC35651  Boechera breweri subsp. shastaensis R. E. Preston 1982-4-7 235 B Butte Cape Horn, ca. 4 mi sw of Paradise. On cliff. 335 Comment
  CHSC35652  Platystemon californicus R. E. Preston 1982-4-7 236 Butte Ca. 10 ft above high water mark, w branch Feather River arm of Lake Oroville, ca. 1 mi. n of Nelson Bar launch ramp, ca 4 mi sw of Paradise. 304 Comment
  CHSC35653  Lasthenia californica R. E. Preston 1982-4-7 237 Butte W side of Lake Oroville, ca. 1/2 mi ne of Lime Saddle Powerhouse, ca. 4.5 mi se of Paradise. 304 Comment
  CHSC35656  Lunaria annua R. E. Preston 1982-4-20 243 Butte N bank of Chico Creek, ca. 100 yds w of Warner St bridge, Chico. Comment
  CHSC35657  Lolium multiflorum R. E. Preston 1982-4-22 245 Butte On n bank of Western Canal, at jct with the Midway, 0.8 mi s of Nelson. 35 Comment
  CHSC35661  Bromus hordeaceus R. E. Preston 1982-4-22 249 Butte On n bank of Western Canal, at jct with the Midway, 0.8 mi s of Nelson. 35 Comment
  CHSC35662  Nassella pulchra R. E. Preston 1982-4-22 250 Butte In saddle of ridge ca. 0.3 mi ne of Lime Saddle Powerhouse, ca. 4.5 mi se of Paradise. 353 Comment
  CHSC35664  Melica californica R. E. Preston 1982-4-22 252 Butte Ca. 1/2 mi ne of Lime Saddle Powerhouse, ca. 4.5 mi sw of Paradise. 289 Comment
  CHSC35665  Hedypnois cretica R. E. Preston 1982-4-22 253 Butte Ca. 1/2 mi ne of Line Saddle Powerhouse, ca. 4.5 mi se of Paradise. 304 Comment
  CHSC35667  Lamarckia aurea R. E. Preston 1982-4-22 257 Butte Slope at lakeside; Lake Oroville, ca. 0.9 mi ne of Lime Saddle Powerhouse, ca. 4.5 mi se of Paradise. 280 Comment
  CHSC35668  Chaenactis glabriuscula var. heterocarpha R. E. Preston 1982-4-22 259 Butte 100 ft n of Lake Oroville, ca. 0.9 mi ne of Lime Saddle Powerhouse, ca. 4.5 mi se of Paradise. 289 Comment
  CHSC35669  Packera eurycephala var. lewisrosei R. E. Preston 1982-4-22 260 Butte Lakeside; Lake Oroville, ca. 1/2 mi ne of Lime Saddle Powerhouse, ca. 4.5 mi se of Paradise. 286 Comment
  CHSC35670  Madia elegans subsp. vernalis R. E. Preston 1982-4-22 262 Butte Ca. 0.3 mi e of Lime Saddle Powerhouse, ca. 4.5 mi se of Paradise. (In dirt road). 335 Comment
  CHSC35671  Bromus madritensis subsp. madritensis R. E. Preston 1982-4-25 264 Butte Slope at lakeside; Lake Oroville, ca. 1/2 mi ne of Lime Saddle Powerhouse, ca. 4.5 mi se of Paradise. 280 Comment
  CHSC35672  Ancistrocarphus filagineus R. E. Preston; R. A. Schlising 1982-4-25 265 Butte Lake Oroville, ca. 1/2 mi NE of Lime Saddle Powerhouse, ca. 4.5 mi SE of Paradise. 280 Comment
  CHSC35675  Lasthenia glaberrima R. E. Preston 1982-5-9 279 Butte At edge of pasture on e side of Cohasset Rd, ca. 0.4 mi n of Eaton Rd. 57 Comment
  CHSC35676  Lunaria annua R. E. Preston 1982-5-12 280 Butte Bidwell Park, ca. 10 m s of S. Park Drive, ca. 0.4 km e of Hwy 99, Chico. Comment
  CHSC35744  Streptanthus polygaloides R. E. Preston 1982-4-22 258 Butte Lake Oroville, ca. 0.9 mi ne of Lime Saddle Powerhouse, ca. 4.5 mi se of Paradise. 286 Comment
  CHSC35745  Thysanocarpus curvipes var. elegans R. E. Preston 1982-4-25 266 Butte Along cliff face; sw face of Cape Horn, Lake Oroville, ca. 4.5 mi se of Paradise. 426 Comment
  CHSC35746  Thysanocarpus radians R. E. Preston 1982-4-29 268 Butte N jct of Cherokee Rd and Oregon Gulch Rd, ca. 6.5 mi n of Oroville. 419 Comment
  CHSC35747  Thysanocarpus curvipes var. elegans R. E. Preston 1982-4-29 269 Butte At side of Hwy 70, ca. 0.2 mi s of Butte/Plumas Co. line. 487 Comment
  CHSC35748  Bromus tectorum R. E. Preston 1982-5-18 283 Butte Roadside. Forbestown Diversion Dam. 548 Comment
  CHSC35749  Streptanthus polygaloides R. E. Preston 1982-5-18 285 Butte Ca. 0.5 mi sw of Forbestown Dam. 640 Comment
  CHSC35751  Athysanus pusillus R. E. Preston 1982-5-26 290 Butte At e margin of meadow; at Cherry Hill, ca. 2 mi w of Jonesville. 1414 Comment
  CHSC35752  Centaurea melitensis R. E. Preston 1982-6-2 292 Butte Ca. 0.7 mi ne of Lime Saddle Powerhouse, ca. 4.5 mi se of Paradise. 365 Comment
  CHSC35754  Bromus laevipes R. E. Preston 1982-6-2 295 Butte At side of Nelson Bar Rd, at jct with dirt rd to Lime Saddle Powerhouse; ca. 4.5 mi se of Paradise. 292 Comment
  CHSC35755  Polygala cornuta R. E. Preston 1982-6-6 296 Butte Ridgetop, 1 mi e of Magalia. 762 Comment
  CHSC35757  Sisymbrium orientale R. E. Preston 1982-6-9 299 Butte On w side of The Esplanade at bridge over Chico Creek, Chico. 59 Comment
  CHSC35758  Turritis glabra R. E. Preston 1982-6-15 300 Butte At e margin of meadow; Cherry Hill, ca. 2 mi w of Jonesville. 1414 Comment
  CHSC35759  Boechera rectissima R. E. Preston 1982-6-15 301 Butte At e margin of meadow; Cherry Hill, ca. 2 mi w of Jonesville. 1414 Comment
  CHSC35760  Sisymbrium altissimum R. E. Preston 1982-6-18 302 Butte In meadow; site of Merrimac, ca. 22 mi ne of Oroville. 1173 Comment
  CHSC35761  Cardamine breweri R. E. Preston 1982-6-18 303 Butte At stream margin; site of Merrimac, ca. 22 mi ne of Oroville. 1173 Comment
  CHSC35762  Turritis glabra R. E. Preston 1982-6-18 304 Butte In meadow; site of Merrimac, ca. 22 mi ne of Oroville. 1173 Comment
  CHSC35763  Erysimum capitatum var. capitatum R. E. Preston 1982-6-18 306 Butte On roadcut on e side of Oro-Quincy Hwy; ca. 1.2 mi n of rd to Fourmile Ridge, ca. 3 mi ne of Brush Creek. 1036 Comment
  CHSC35998  Streptanthus longisiliquus R. E. Preston 1982-6-23 314 Butte On banks of roadcut and at sides of road, ca. 2 mi sse of Stirling City. 944 Comment
  CHSC35999  Cardamine nuttallii var. covilleana R. E. Preston 1982-7-1 322 Butte Margins of meadow; ca. 4 mi e of Jonesville. 1950 Comment
  CHSC36079  Eremogone cliftonii R. E. Preston; R. Banchero, R. A. Schlising 1982-6-23 4300 Butte N of Concow area and n of Flea Mt. in central part of county; at roadside. 1112 Comment
Read comments Jul 8 2014
  CHSC36678  Boechera platysperma R. E. Preston 1982-7-21 349 Butte Ca. 1 mi se of Philbrook Reservoir. 1972 Comment
  CHSC36679  Boechera arcuata R. E. Preston 1982-4-29 274 Butte At edge of trail to Bear Ranch Creek falls, s side of Hwy 70, ca. 100 yds sw of PG and E rest stop. 487 Comment
  CHSC36680  Barbarea orthoceras R. E. Preston 1982-6-25 317 Butte On the bank of Kanaka Cr; in n meadow at site of Powellton, ca. 3 mi nw of Stirling City. 1097 Comment
  CHSC36683  Barbarea orthoceras R. E. Preston 1982-7-21 347 Butte At roadside; ca. 1/4 mi se of Philbrook Reservoir. 1706 Comment
  CHSC36684  Rorippa curvisiliqua var. orientalis R. E. Preston; R. A. Schlising 1982-6-23 309 Butte On bank of small stream; ca. 1/2 mi sw of Rag Dump. 1182 Comment
  CHSC36685  Rorippa curvisiliqua var. orientalis R. E. Preston 1982-7-21 347 A Butte At roadside; ca. 1/4 mi se of Philbrook Reservoir. 1706 Comment
  CHSC36686  Rorippa curvisiliqua var. orientalis R. E. Preston; L. E. Preston 1982-7-20 344 Butte Bed of stream; in meadow, ca. 1 mi s of Humbug Summit, ca. 4 1/2 miles ese of Jonesville. 1950 Comment
  CHSC36687  Rorippa curvisiliqua var. orientalis R. E. Preston 1982-5-19 289 Butte In meadow; 1/4 mi n of Fall River Campground. 1021 Comment
  CHSC36688  Rorippa curvisiliqua var. orientalis R. E. Preston 1982-7-16 342 Butte Near small stream; ca. 1/2 mi sw of Crane Valley. 1554 Comment
  CHSC36689  Sisymbrium officinale R. E. Preston 1982-6-25 315 Butte Meadow; s meadow at site of Powellton. 1107 Comment
  CHSC36690  Streptanthus tortuosus R. E. Preston 1981-6-22 99 Butte Ca. 7 mi ne of the town of Feather Falls. 1280 Comment
  CHSC36691  Streptanthus tortuosus R. E. Preston 1982-5-18 284 Butte On s side of Forbestown reservoir, ca. 4 mi ne of Forbestown. 579 Comment
  CHSC36692  Streptanthus tortuosus R. E. Preston 1982-5-18 284 Butte On s side of Forbestown reservoir, ca. 4 mi ne of Forbestown. 579 Comment
  CHSC36693  Streptanthus tortuosus var. suffrutescens R. E. Preston 1982-4-25 267 Butte Cape Horn, w fork of Lake Oroville, ca. 4.5 mi se of Paradise. 426 Comment
  CHSC36694  Streptanthus tortuosus R. E. Preston 1982-5-18 286 Butte Roadcut, on w side of Oro-Quincy Hwy, ca. 0.4 mi n of Canyon Cr bridge over Lake Oroville, ca. 7 mi ne of Oroville. 304 Comment
  CHSC36696  Streptanthus tortuosus R. E. Preston 1981-6-16 88 Butte Ca. 10.5 mi ne of Paradise. 1127 Comment
  CHSC36698  Streptanthus tortuosus R. E. Preston 1982-6-18 305 Butte Ca. 1 mi n of the site of Merrimac, ca. 23 mi ne of Oroville. 1371 Comment
  CHSC38021  Boechera breweri R. E. Preston 1981-6-13 87 Butte S side of canyon, middle fork of Feather River at Milsap Bar, ca. 20.5 mi NE of Oroville. 609 Comment
  CHSC38022  Brassica nigra R. E. Preston 1982-4-4 218 Butte On bank of levee; on s side of Rutherford Rd, ca. 0.7 mi w of Pennington Rd, Gray Lodge State Wildlife Area. 21 Comment
  CHSC38023  Streptanthus drepanoides R. E. Preston 1982-4-7 234 Butte Ca. 0.6 mi ese of Kunkle Reservoir, on W. Branch Feather River arm of Lake Oroville, ca. 4.5 mi se of Paradise. 280 Comment
  CHSC38024  Rorippa curvisiliqua var. curvisiliqua R. E. Preston 1982-4-22 244 Butte S bank of Western Canal, 0.8 mi S of Nelson. 35 Comment
  CHSC38026  Streptanthus drepanoides R. E. Preston 1982-6-2 293 Butte Ca. 0.6 mi ese of Kunkle Reservoir, on W. Branch Feather River arm of Lake Oroville, ca. 4.5 mi se of Paradise. 280 Comment
  CHSC38028  Triteleia montana R. E. Preston 1982-7-21 348 Butte Ca. 0.6 mi SE of Philbrook Reservoir. 1853 Comment
  CHSC38031  Raphanus raphanistrum R. E. Preston 1982-11-5 362 Butte At roadside, n side of Cana Hwy, 100 yds e of Cana-Pine Creek Rd, Cana. 50 Comment
  CHSC38032  Sinapis arvensis R. E. Preston 1982-11-5 363 Butte At roadside, n side of Cana Hwy, 100 yds e of Cana-Pine Creek Rd, Cana. 50 Comment
  CHSC38034  Capsella bursa-pastoris R. E. Preston 1982-11-13 365 Butte At edge of almond orchard, s side of Nelson Rd at jct with Adobe Rd, ca. 3 1/4 mi ne of Nelson. 46 Comment
  CHSC38035  Raphanus raphanistrum R. E. Preston 1982-11-13 366 Butte Along sides of Chico-Butte City Hwy, ca. 13 1/2 mi ssw of Chico. 30 Comment
  CHSC38037  Hirschfeldia incana R. E. Preston 1982-11-13 367 Butte At roadside, Nelson Rd, ca. 100 yds w of Butte Creek, ca. 4 mi w of Nelson. 30 Comment
  CHSC38038  Brassica rapa R. E. Preston 1982-12-4 368 Butte In a field; n side of River Rd at bend at Bremner Ranch, ca. 7 mi sw of Chico. 33 Comment
  CHSC38039  Capsella bursa-pastoris R. E. Preston 1982-12-4 369 Butte In a field; n side of River Rd at bend at Bremner Ranch, ca. 7 mi sw of Chico. 33 Comment
  CHSC38040  Hirschfeldia incana R. E. Preston 1982-12-4 370 Butte At roadside; n side of Ord Ferry Rd at jct with Seven Mile Lane, ca. 7.8 mi ssw of Chico. 36 Comment
  CHSC38043  Capsella bursa-pastoris R. E. Preston 1983-1-9 373 Butte At roadside; w side of the Midway, 200 yds. n of Butte Creek, ca. 3 mi sse of Durham. 39 Comment
  CHSC38044  Sinapis arvensis R. E. Preston 1983-1-9 374 Butte At roadside; on w side of Nelson Rd, 100 ft e of RR crossing, Nelson. 36 Comment
  CHSC38045  Capsella bursa-pastoris R. E. Preston 1983-1-9 375 Butte In a field, w side of Aguas-Frias Rd, ca. 200 yds s of Butte Creek; ca. 13.5 mi s of Chico. 28 Comment
  CHSC38046  Brassica rapa R. E. Preston 1983-1-9 376 Butte In ditch on w side of Aguas Frias Rd, 1.2 mi n of Ritchvale Rd, ca. 6 mi w of Richvale. 27 Comment
  CHSC38047  Sinapis arvensis R. E. Preston 1983-1-9 377 Butte At roadside; jct Aguas Frias Rd and Richvale Rd, ca. 6 mi w of Richvale. 26 Comment
  CHSC38048  Raphanus raphanistrum R. E. Preston 1983-1-9 378 Butte On levee of irrigation ditch, w side of Aguas Frias Rd ca. 0.9 mi n of Richvale Rd, ca. 6 mi w of Richvale. 27 Comment
  CHSC38049  Lobularia maritima R. E. Preston 1983-1-14 378 A Butte Collected from the planter on First St, on S side of Kendall Hall, campus of C.S.U., Chico. Comment
  CHSC38051  Lepidium nitidum R. E. Preston 1983-2-16 381 Butte In field on NW corner of The Skyway and Notre Dame Blvd, Chico. 68 Comment
  CHSC38052  Raphanus sativus R. E. Preston 1983-2-16 382 Butte At the SW corner of the intersection of Notre Dame Blvd and Forest Ave, Chico. 68 Comment
  CHSC38054  Streptanthus tortuosus R. E. Preston 1983-5-26 384 Butte Roadside, Hwy 70 ca. 1 3/4 mi SW of Pulga. 548 Comment
  CHSC38055  Hirschfeldia incana R. E. Preston 1983-5-26 385 Butte At roadside; at PG and E rest stop near Arch Rock Tunnel, ca. 4 mi NE of Pulga. 475 Comment
  CHSC38057  Lepidium strictum R. E. Preston 1983-5-26 386 Butte At roadside; at PG and E rest stop near Arch Rock Tunnel, ca. 4 mi NE of Pulga. 475 Comment
  CHSC38058  Descurainia sophia R. E. Preston 1983-6-1 389 Butte Found at roadside, 0.5 mi S of Hegan Lane on Dayton-Durham Rd. Comment
  CHSC38059  Brassica oleracea var. gemmifera R. E. Preston 1982-3-25 198 Butte In a garden in Chico. Comment
  CHSC38060  Brassica oleracea var. gemmifera R. E. Preston 1982-3-25 198 Butte In a garden in Chico. Comment
  CHSC38061  Brassica oleracea var. gemmifera R. E. Preston 1982-3-25 198 Butte In a garden in Chico. Comment
  CHSC38062  Hypericum anagalloides R. E. Preston 1982-6-23 308 Butte In meadow at edge of stream, Deadwood Creek at Dixie Valley Road. 999 Comment
  CHSC38063  Rumex acetosella R. E. Preston 1982-6-23 308 B Butte In meadow at edge of stream; Deadwood Creek at Dixie Valley Road. 999 Comment
  CHSC38065  Bromus orcuttianus R. E. Preston 1982-6-23 310 Butte Bank on side of road just N of Fall Creek, SW of Rag Dump. 1158 Comment
  CHSC38066  Panicum acuminatum R. E. Preston; R. A. Schlising 1982-6-23 311 Butte Bank on side of road just N of Fall Creek, SW of Rag Dump. 1158 Comment
  CHSC38067  Eriophyllum lanatum var. croceum R. E. Preston 1982-6-23 312 Butte Ca. 1/4 mi N of Fall Creek, SW of Rag Dump. 1158 Comment
  CHSC38071  Carex aurea R. E. Preston 1982-6-25 319 Butte Ca. 1.2 mi S of Inskip. 1420 Comment
  CHSC38072  Lewisia nevadensis R. E. Preston 1982-7-1 324 Butte At margin of meadow; ca. 1 mi S of Humbug Summit. 1950 Comment
  CHSC38078  Trifolium productum R. E. Preston 1982-7-20 343 Butte In small meadow, ca. 1 mi S of Humbug Summit. 1950 Comment
  CHSC38079  Melica fugax R. E. Preston 1982-7-21 350 Butte Ca. 1 mi SE of Philbrook Reservoir. 1828 Comment
  CHSC38080  Trifolium productum R. E. Preston 1982-7-21 351 Butte Ca. 1 mi SE of Philbrook Reservoir. 1828 Comment
  CHSC52775  Ranunculus aquatilis var. hispidulus R. Preston; R. Banchero, J. Fuller, R. A. Schlising 1981-7-21 4159 Butte NE part of county, N of Snow Mountain ridge. In small lake. 1950 Comment
  CHSC52820  Kumlienia hystricula R. E. Preston 1982-3-27 208 Butte N bank of McCabe Cr; ca. 1.7 mi s of Enterprise bridge over Lake Oroville, ca. 11 mi e of Oroville. 451 Comment
  CHSC59850  Poa secunda subsp. secunda R. E. Preston 1982-3-6 187 Butte At boundary of Upper Bidwell Park, n of Horseshoe Lake, Chico. 188 Comment
  CHSC80707  Calochortus nudus R. E. Preston 1982-7-1 323 Butte Meadow; ca. 1 mi S of Humbug Summit. 1950 Comment
  HSC87164  Clarkia arcuata Robert E. Preston 1979-4-22 17 Butte N side of Cherokee Rd., 5 mi. N of Oroville 366 Comment
  JEPS110493  Brodiaea sierrae Robert E. Preston 2004-6-19 2261 Butte 1.3 mi W of Hurleton, along Forbestown Rd 434 Comment
  JEPS114050  Hesperevax acaulis var. acaulis Robert E. Preston 2007-4-4 2421 Butte 5.2 moi NNE of Oroville, on North Table Mountain Comment
  NY990638  Brodiaea sierrae R. Preston 2004-6-19 2261 Butte 1.3 mi. W of Hurleton, along Forbestown Rd. 434 Comment
  UCD105288  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2007-3-23 2418 Butte Ca. 3.7 mi NW of Oroville on NW side of PG and E substation. 45 Comment
  UCD105290  Dichelostemma capitatum Robert E. Preston 2007-3-23 2417 Butte Ca. 3.7 mi NW of Oroville, on N side of PG and E substation. 48 Comment
  UCD114285  Barbarea orthoceras Robert E. Preston 1985-4-4 512 Butte ca. 1.8 km e of Pulga, at confluence of Dogwood Cr and N Fork Feather R. Montane Forest. 433 Comment
  UCD114352  Boechera breweri subsp. shastaensis Robert E. Preston 1986-4-29 540 Butte ca. 6.5 km n of Oroville, on North Table Mtn. 366 Comment
  UCD114430  Boechera rectissima R. E. Preston 1981-7-8 104 Butte ca. 15 m e of Humboldt Rd, ca. 4.2 km nne of Jonesville. 1970 Comment
  UCD114501  Cardamine californica R. E. Preston 1982-3-20 188 Butte at sides of Highway 70, 1.4 miles NE of Jarbo Gap, 17 miles NNE of Oroville. 670 Comment
  UCD115254  Lepidium dictyotum R. E. Preston 1982-4-4 216 Butte Gray Lodge State Wildlife Area, ca. 0.3 mi w of Headquarters. 20 Comment
  UCD115989  Streptanthus diversifolius Robert E. Preston 1986-4-29 539 Butte 8 km north of Oroville, on North Table Mountain. 396 Comment
  UCD116032  Streptanthus longisiliquus Robert E. Preston 2001-7-9 1673 Butte N side of The Skyway, ca. 0.15 m w of Dogtown Rd, T23N R3E nw 1/4 of ne 1/4 Section 36 713 Comment
  UCD116109  Streptanthus polygaloides R. E. Preston 1982-6-2 291 Butte 0.7 mile northeast of Lime Saddle Powerhouse, 4.5 miles southeast of Paradise. 304 Comment
  UCD116277  Streptanthus tortuosus R. E. Preston 1982-4-25 267 Butte Cape Horn, w fork of Lake Oroville, 4.5 miles SE of Paradise. 426 Comment
  UCD116282  Streptanthus tortuosus Robert E. Preston 1984-4-21 433 Butte 8 km north of Oroville, North Table Mountain. 396 Comment
  UCD116303  Streptanthus tortuosus Robert E. Preston 1984-6-19 463 Butte 1.6 km north of Merrimac site, west side of Oro-Quincy Highway. 1372 Comment
  UCD116315  Streptanthus tortuosus R. E. Preston 1996-5-22 937 Butte along Highway 70, 0.5 mile west of bridge at turnoff to Pulga. 512 Comment
  UCD116316  Streptanthus tortuosus R. E. Preston 1996-5-22 938 Butte along Highway 70, 0.1 mile west of access to Cresta Powerhouse. 457 Comment
  UCD139106  Brodiaea californica Robert E. Preston 2003-5-11 2132 a Butte ca. 5.25 mile east of Durham, along Pentz Road, 0.65 mile east of Hwy 99. 74 Comment
  UCD140139  Carex athrostachya Robert E. Preston 1982-7-16 340 Butte Crane Valley. 1584 Comment
  UCD140478  Carex lemmonii Robert E. Preston 1982-7-16 335 Butte Crane Valley. 1584 Comment
  UCD140978  Carex vesicaria Robert E. Preston 1982-7-16 334 Butte Crane Valley. 1584 Comment
  UCD141681  Juncus oxymeris Robert E. Preston 1982-7-16 337 Butte Crane Valley. Comment
  UCD147859  Brodiaea nana Robert E. Preston 2005-5-9 2340 a Butte Chico, SW of jct Humboldt Rd and Bruce Rd. 80 Comment
  UCD147860  Brodiaea minor Robert E. Preston 2005-5-9 2340 b Butte Chico, SW of jct Humboldt Rd and Bruce Rd. 81 Comment
  UCD147861  Brodiaea coronaria Robert E. Preston 2005-6-13 2352 Butte 3 mi ESE of Richvale, in field along W side of Hwy 99. 34 Comment
  UCD147862  Brodiaea coronaria Robert E. Preston 2005-6-13 2354 Butte Ca. 4 mi NW of Oroville, in field along N side of Cottonwood Rd. 55 Comment
  UCD148232  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-3-16 2893 Butte 7.9 mi NNE of Oroville, along E side of Clark Rd, 0.9 mi N of its jct with Hwy 70. 84 Comment
  UCD163429  Eriogonum umbellatum var. ahartii Robert E. Preston 2015-7-17 3011 Butte Along Concow Rd, 1.8 mi NE of Concow Reservoir. 866 Comment
  UCD48552  Navarretia nigelliformis Robert E. Preston 2004-5-25 2246 Butte Ca. 5 mi N of Oroville, at E side of substation. 53 Comment
Read comments Feb 28 2007
  UCD59428  Navarretia heterandra Robert E. Preston 2005-6-13 2353 Butte Ca. 4 mi. NW of Oroville, in field along N side of Cottonwood Rd. 54 Comment
Read comments May 14 2010
  UCD77126  Brodiaea coronaria Robert E. Preston 2003-5-11 2130 Butte Ca. 2.25 mi W of Pentz, along Pentz Rd, ca. 0.5 mi E of Clark Rd. 97 Comment
Read comments Jun 17 2014
  UCD77136  Brodiaea nana Robert E. Preston 2003-5-11 2128 Butte 3 mi ESE of Richvale, along Hwy 99, 0.9 mi S of its jct with Hwy 162 35 Comment
  UCD77155  Brodiaea minor Robert E. Preston 2002-6-7 1812 Butte Paradise, along Honey Run Rd, ca. 0.6 mi s of its jct with The Skyway. 433 Comment
  UCD77176  Brodiaea minor Robert E. Preston 2002-6-28 1893 Butte Forbestown. 832 Comment
  UCD77184  Brodiaea coronaria Robert E. Preston 2004-4-21 2216 Butte Ca. 4.3 mi NW of Oroville. 56 Comment
Read comments Jun 17 2014
  UCD77195  Brodiaea nana Robert E. Preston 2004-4-21 2217 Butte Ca. 4.3 mi NW of Oroville. 56 Comment
  UCD77203  Brodiaea coronaria Robert E. Preston 2003-5-18 2140 Butte Ca. 2.25 mi N of Cana, along Cana-Pine Creek Rd, ca. 0.4 mi N of Pine Creek 51 Comment
  UCD77277  Plantago coronopus Robert E. Preston 2005-3-24 2326 Butte Palermo Substation, ca. 1.3 mi NE of Palermo 121 Comment
  UCD77560  Clarkia purpurea subsp. purpurea Robert E. Preston 2004-4-21 2214 Butte Ca. 4.3 miles NW of Oroville. 51 Comment
  UCD77626  Epilobium cleistogamum Robert E. Preston 2004-5-25 2247 Butte Ca. 5 mile N of Oroville, at E side of substation. 53 Comment
  UCD77762  Hesperevax caulescens Robert E. Preston 2004-4-21 2215 Butte Ca. 4.3 mi NW of Oroville 53 Comment
  UCD77884  Navarretia heterandra Robert E. Preston 2005-6-13 2353 Butte Ca. 4 mi NW of Oroville, in field along N side of Cottonwood Rd 54 Comment
  UCD77900  Parentucellia viscosa Robert E. Preston 2003-5-11 2131 Butte ca. 2.25 mi W of Pentz, along Pentz Rd, ca. 0.5 mi E of Clark Rd. 97 Comment
  UCD77982  Rupertia hallii Robert E. Preston 2003-7-17 2161 Butte Ca. 1 mi SW of Butte Meadows, along both sides of The Skyway 1447 Comment
  UCD78062  Trifolium jokerstii Robert E. Preston 2005-3-24 2327 Butte Ca. 3.5 miles NW of Oroville, in field along E side of Table Mountain substation 53 Comment
  UCD78199  Brodiaea sierrae R. E. Preston 2002-6-7 1811 Butte Magalia, along The Skyway, 0.1 mi n of jct with Coutelenc Rd 704 Comment
  UCD78201  Brodiaea sierrae R. E. Preston 2002-6-28 1892 Butte Forbestown. 832 Comment
  UCD80865  Crucianella angustifolia Robert E. Preston 2007-6-7 2557 Butte North Table Mountain, along Cherokee Rd, 0.65 mi N of Oregon Gulch Rd. 417 Comment
  UCD80871  Ranunculus arvensis Robert E. Preston 2007-5-3 2473 Butte Chico, Upper Bidwell Park, N of park road, W of power lines. 91 Comment
  UCD85131  Glyceria elata Robert E. Preston 1982-7-16 333 Butte ca. 1/2 mi. SW of Crane Valley. At margin of stream. 1554 Comment
  UCD85409  Hordeum brachyantherum subsp. brachyantherum Robert E. Preston 1982-7-21 345 Butte Ca. 1.1 miles W of Philbrook Res. Upper Montane Forest. 1676 Comment
  UCD92088  Poa tenerrima Robert E. Preston 2002-3-21 1778 Butte Chico, NE of intersection of Skyway and Bruce Rd. 70 Comment
  SEINET11991659  Barbarea orthoceras R. E. Preston 1981-1 84 Butte N side of Butte Creek, ca 3.2 km NE of Butte Meadows, near Cherry Hill 1415 Comment
  SEINET12326961  Orthocarpus purpurascens R. E. Preston 1979-1 20 Butte 5.8 mi N of Oroville 366 Comment
  SEINET12326963  Orthocarpus attenuatus R. E. Preston 1979-1 18 Butte N of Cherokee Rd, 5 mi N of Oroville 366 Comment
  UCD114124  Boechera arcuata Robert E. Preston 1985-4-4 509 Butte Bear Ranch Creek, south of Hwy 70, along trail between hwy and falls. 463 Comment
  UCD114126  Boechera arcuata Robert E. Preston 1985-4-4 511 Butte ca. 0.5 mi SW of Mayaro. 585 Comment
  UCD114301  Boechera arcuata Robert E. Preston 1985-4-4 510 Butte ca. 0.5 mi SW of Mayaro. 585 Comment
  UCD114350  Boechera breweri subsp. shastaensis R. E. Preston 1982-4-7 235 B Butte S facing cliffs of Cape Horn; ca. 4.5 mi SE of Paradise. 335 Comment
  UCD114531  Cardamine Robert E. Preston 1983-2-7 380 Butte above the SW bank of McCabe's Creek, at its junction with Lumpkin Road, 10 miles E of Oroville. 371 Comment
  UCD115291  Rorippa curvisiliqua var. orientalis R. E. Preston 1996-4-30 932 Butte 4.5 miles north of Hamilton City, on gravel bar on east side of the Sacramento River. 44 Comment
  UCD115309  Rorippa curvisiliqua R. E. Preston 1996-4-30 931 Butte 4.5 miles north of Hamilton City, on gravel bar on the east side of the Sacramento River. 44 Comment
  UCD115668  Thysanocarpus curvipes Robert E. Preston 1988-4-15 589 Butte 6 miles N of Oroville, Table Mountain, near the head of the S fork of Coal Canyon. 373 Comment
  UCD120768  Plagiobothrys austiniae Robert E. Preston 1990-3-11 594 Butte Chico, N end of Cactus Ave. 76 Comment
  UCD140104  Carex angustata Robert E. Preston 1982-7-16 338 Butte Crane Valley, on streambank. 1584 Comment
  UCD140697  Carex nudata Robert E. Preston 1990-4-19 595 Butte on banks of Butte Creek, at site of proposed Forks of Butte diversion dam, west of DeSabla. 676 Comment
  UCD140771  Carex praegracilis R. E. Preston 1982-4-4 215 Butte Gray Lodge wildlife management area. 18 Comment
  JEPS114032  Isolepis cernua Robert E. Preston 2007-5-31 2544 Calaveras 2.8 mi S of Copperopolis, along Sawmill Creek. Comment
  JEPS114046  Eryngium vaseyi var. vallicola Robert E. Preston 2007-4-15 2432 Calaveras 0.6 mi SE of Milton, along Rock Creek Road Comment
  JEPS117733  Dichelostemma lacuna-vernalis Robert E. Preston 2008-3-15 2589 Calaveras 1.3 mi S of Burson, along Burson Rd. 126 Comment
  JEPS117736  Eryngium vaseyi var. vallicola Robert E. Preston 2008-6-4 2639 Calaveras Ca. 2,25 mi SW of Copperopolis. 248 Comment
  UCD105293  Dichelostemma capitatum Robert E. Preston 2007-4-15 2429 Calaveras 5 mi NW of Copperopolis, along Salt Springs Valley Rd. 0.15 mi S of jct with Rock Creek Rd. 341 Comment
  UCD105302  Brodiaea nana Robert E. Preston 2007-4-15 2427 Calaveras 1.4 mi N of Milton, along Milton Rd. 105 Comment
  UCD105533  Dichelostemma capitatum Robert E. Preston 2010-4-17 2763 Calaveras 1.4 mi NNE of Burson, along Chile Camp Rd, 0.7 mi E of Burson Rd. 105 Comment
  UCD127495  Eryngium vaseyi var. vallicola Robert E. Preston 2005-5-15 2244 Calaveras ca. 1 mile south-southeast of Milton, along Rock Creek Road. 86 Comment
  UCD163106  Dichelostemma capitatum subsp. lacuna-vernalis Robert E. Preston 2014-3-22 2947 Calaveras 2.4 mi SE of Wallace, along Ospital Rd, at int with Southworth Rd. 79 Comment
  UCD77181  Brodiaea nana Robert E. Preston 2004-4-17 2211 Calaveras 1.5 mi NW of Burson, along Comanche Parkway. 116 Comment
  UCD77188  Brodiaea coronaria Robert E. Preston 2004-4-17 2212 Calaveras 2 mi W of Jenny Lind, at jct Milton Rd and Gregory Rd. 60 Comment
Read comments Jun 17 2014
  UCD77192  Brodiaea elegans subsp. elegans Robert E. Preston 2004-5-15 2243 Calaveras Ca. 1 mi SSE of Milton, along Rock Creek Rd. 86 Comment
  UCD78138  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2008-3-15 2588 Calaveras 0.75 mi SE of Wallace, on S side of Hwy 12 75 Comment
  UCD78189  Plagiobothrys distantiflorus Robert E. Preston 2008-6-3 2636 b Calaveras Ca. 2.75 mi S of Copperopolis, along Sawmill Creek. 190 Comment
  UCD78190  Ptelea crenulata Robert E. Preston 2008-6-3 2637 Calaveras Ca. 2.75 miles S of Copperopolis, along Sawmill Creek. 190 Comment
  UCD78191  Eryngium vaseyi var. vallicola Robert E. Preston 2008-6-4 2638 Calaveras Ca. 1.8 mi SW of Copperopolis, along tributary to Littlejohns Creek 251 Comment
  UCD80858  Thysanocarpus curvipes Robert E. Preston 2007-4-15 2430 Calaveras 5 miles NW of Copperopolis, along Salt Springs Valley Rd., 0.15 miles S of jct with Rock Creek Road. 341 Comment
  UCD80859  Ranunculus hebecarpus Robert E. Preston 2007-4-15 2431 Calaveras 5 mi NW of Copperopolis, along Salt Springs Valley Rd., 0.15 mi S of jct with Rock Creek Rd. 341 Comment
  UCD80860  Oxalis micrantha Robert E. Preston 2007-4-8 2425 Calaveras 1.4 mi N of Milton, along Milton Rd. 105 Comment
  UCD80862  Trifolium obtusiflorum Robert E. Preston 2007-5-31 2544 a Calaveras 2.2 mi S of Copperopolis, along Sawmill Creek. 222 Comment
  UCD80863  Eryngium pinnatisectum Robert E. Preston 2007-5-31 2545 Calaveras 2.6 mi S of Copperopolis, along Sawmill Creek. 211 Comment
  UCD80864  Parapholis incurva Robert E. Preston 2007-5-31 2544 b Calaveras 2.2 mi S of Copperopolis, along Sawmill Creek. 222 Comment
  UCD116286  Streptanthus tortuosus Robert E. Preston 1984-5-5 441 Calaveras at top of cliffs north of O'Byrne's Ferry. 305 Comment
  UCD77696  Eryngium pinnatisectum Robert E. Preston 2001-6-8 1539 Calaveras 2 mi n of Copperopolis, along Rock Creek Rd. 335 Comment
  CHSC96039  Dittrichia graveolens Robert E. Preston 2006-10-27 2411 Colusa Colusa County. 2.3 miles N of Maxwell, at on-ramp from Hwy 99 to I-5. 25 Comment
  UCD118848  Leptosiphon latisectus Robert E. Preston 1995-3-26 724 Colusa mi west of Stonyford, 0.25 mile north of North Fork campground. Comment
  UCD77237  Amsinckia lunaris Robert E. Preston 2005-4-10 2330 Colusa Ca. 0.9 mi ESE of Wilbur Springs, along Bear Valley Road. 373 Comment
  UCD77502  Centromadia parryi subsp. rudis Robert E. Preston 1999-9-24 1242 Colusa Antelope Valley, at head of Salt Canyon. 219 Comment
  UCD118988  Leptosiphon parviflorus Robert E. Preston 1995-6-2 869 Colusa Walker Ridge. 1005 Comment
  UCD120840  Plagiobothrys humistratus Robert E. Preston 1995-6-2 868 Colusa Bear Valley Road. Comment
  UCD77929  Polanisia dodecandra subsp. trachysperma Robert E. Preston 1999-9-24 1244 Colusa Along Highway 162, 2 miles W of Tehama Colusa Canal. 91 Comment
  CAS-BOT-BC288874  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-6 1178 Contra Costa Along flood plain of Alamo Creek, along Dougherty Rd, N of the Alameda/Contra Costa County line 143 Comment
  JEPS95222  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-6 1173 Contra Costa E side of Camino Tassajara, ca. 1 mi S of Highland Road 170 Comment
  UC1777686  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-25 1198 Contra Costa junction of Sycamore Valley Rd and Camino Tassajara Danville 129 Comment
  UCD129618  Blepharizonia plumosa Robert E. Preston 2001-10-7 1777 Contra Costa Black Diamond Mines Regional Park, on w side of Stewartsville Trail, 0.75 mi s of Parking lot at Frederickson Lane trailhead. 152 Comment
  UCD130133  Centromadia parryi subsp. congdonii Robert E. Preston 1998-10-25 1198 Contra Costa Danville, at junction of Sycamore Valley Road and Camino Tassajara. 129 Comment
  UCD130136  Centromadia parryi subsp. congdonii Robert E. Preston 1998-10-6 1179 Contra Costa San Ramon, in pasture on west side of San Ramon Valley Road, 0.2 mile north of Pine Valley Road. 129 Comment
  UCD130137  Centromadia parryi subsp. congdonii Robert E. Preston 1998-10-6 1172 Contra Costa on west side of Camino Tassajara, 0.5 to 0.9 miles south of Highland Road. 176 Comment
  UCD148252  Atriplex coronata Robert E. Preston 2013-6-21 2914 Contra Costa 3.5 mi SW of Byron. 62 Comment
  UCD148254  Astragalus asymmetricus Robert E. Preston 2013-6-21 2916 Contra Costa 3.9 mi SW of Byron. 140 Comment
  UCD77403  Atriplex depressa Robert E. Preston 2000-8-6 1431 Contra Costa Ca. 2.1 mi ssw of Byron Hot Springs, in field along s side of Armstrong Rd, T1S R3E se 1/4 Section 28 30 Comment
  UCD77424  Blepharizonia plumosa Robert E. Preston 2001-10-7 1777 Contra Costa Black Diamond Mines Regional Park, on w side of Stewartsville Trail, 0.75 mi s of Parking lot at Frederickson Lane trailhead. 152 Comment
Read comments Mar 14 2018
  UCD77859  Microseris douglasii Robert E. Preston 1997-3-8 1018 Contra Costa Black Diamond Mines Regional Park, along Stewartsville Trail. 91 Comment
  UCD77933  Polygonum argyrocoleon Robert E. Preston 2002-6-26 1890 Contra Costa Ca. 0.75 mi S of Werner, W of Werner Dredger Cut, in field 0 Comment
  UCD77977  Rubus pensilvanicus Robert E. Preston 2002-6-26 1891 Contra Costa Ca. 0.25 mi SW of Orwood, along Orwood Rd, near Old River 0 Comment
  UCD78167  Atriplex joaquinana Robert E. Preston 2008-4-24 2619 Contra Costa 4.8 mi SSE of Byron, ca. 300 ft E of Vasco Rd 12 Comment
  JEPS99040  Atriplex coronata Robert E. Preston & Eva Buxton 1994-8-4 618 Contra Costa 0.9 mi NW Marsh Creek Reservoir. 76 Comment
  SEINET9292764  Atriplex cordulata Robert Preston, Muth, David 1993-9-7 634 Contra Costa Briones Valley, ca. 1 mile W of Marsh Creek Reservoir, in overflow channel of stock pond; in unsurveyed section. USGS Antioch South 7.5' quad. With Lotium multiflorum, Hordeum marinum ssp. gussoneanum. Comment
  UCD100135  Eriogonum gracile Robert E. Preston 1996-9-27 1013 Contra Costa NW-facing hillside, 0.5 mile south of Contra Loma Reservoir. 106 Comment
  UCD126330  Cuscuta salina Robert E. Preston; Eva Buxton 1994-8-4 677 Contra Costa east end of Briones Valley, west of Marsh Creek Reservoir. 60 Comment
  UCD133200  Holocarpha macradenia Robert E. Preston 1993-6-29 624 Contra Costa Pinole, ca. 1,000 feet east of Interstate 80, between Interstate 80 and Crespi Junior High School. 94 Comment
  UCD77402  Atriplex coronata Robert E. Preston 2000-8-6 1430 Contra Costa Ca. 2 mi sw of Byron, in field along w side of Byron Hot Springs Rd, n of Armstrong Rd, T1S R3E se 1/4 Section 15 12 Comment
  UCD77460  Carex rossii Robert E. Preston 1999-3-21 1204 Contra Costa Black Diamond Mines Regional Preserve, at top of rock outcrops along the w side of the Black Diamond Mines trail, just s of its jct with Manhattan Canyon trail cutoff. 365 Comment
  UCD77574  Croton californicus Robert E. Preston 1999-10-19 1249 Contra Costa Along W side of Bethel Island Rd, about 0.3-0.9 mi N of Cypress Rd, 5.4 mi E of Oakley. 6 Comment
  UCD77691  Eryngium spinosepalum Robert E. Preston 2000-8-6 1432 Contra Costa 2 mi se of Byron Hot Springs, on w side of Byron Hot Springs Rd. 12 Comment
  UCD97337  Atriplex cordulata Robert E. Preston; David Muth 1993-9-3 633 Contra Costa 1500 feet north of Marsh Creek Road, 2.75 miles west of its junction with Vasco Road. 91 Comment
  UCD97358  Atriplex coronata Robert E. Preston; David Muth 1993-9-7 634 Contra Costa Briones Valley, 1 mile west of Marsh Creek Reservoir. 62 Comment
  UCD97412  Atriplex fruticulosa Robert E. Preston; Eva Buxton 1994-8-4 674 Contra Costa east end of Briones Valley, west of Marsh Creek Reservoir. 60 Comment
  UCD97555  Atriplex minuscula Robert E. Preston 1996-7-30 988 Contra Costa on both sides of Greenville Road, 1/2 mile south of I-580. Comment
Read comments Sep 3 2012
  UCD97866  Atriplex Robert E. Preston; Eva Buxton 1994-8-4 676 Contra Costa east end of Briones Valley, west of Marsh Creek Reservoir. 60 Comment
  UCD115886  Lepidium virginicum subsp. menziesii Robert E. Preston 1983-8-27 410 El Dorado South Lake Tahoe, 1703 Keller Dr., at side of house. 2098 Comment
  UCD163115  Frasera albicaulis var. nitida Robert E. Preston 2014-6-11 2972 El Dorado 3.5 mi NE of Georgetown, on E slope of Little Bald Mtn. 909 Comment
  UCD163117  Chlorogalum pomeridianum var. pomeridianum Robert E. Preston 2014-6-11 2971 El Dorado 3.5 mi NE of Georgetown, on E slope of Little Bald Mtn. 903 Comment
  UCD163118  Streptanthus polygaloides Robert E. Preston 2014-6-11 2973 El Dorado 3.5 mi NE of Georgetown, on E slope of little Bald Mtn. 909 Comment
  UCD163119  Allium sanbornii var. sanbornii Robert E. Preston 2014-6-11 2970 El Dorado 3.5 mi NE of Georgetown, on E slope of Little Bald Mtn. 903 Comment
  UCD163363  Calystegia vanzuukiae Robert E. Preston 2014-6-21 2976 El Dorado El Dorado: Ca. 1.6 mi NE of Georgetown, along E side of Fox Run Rd. 823 Comment
  UCD163376  Navarretia intertexta subsp. intertexta Robert E. Preston 2015-5-29 2998 El Dorado 2.25 mi SSE of Georgetown, along Bear Creek Rd. 710 Comment
  UCD163378  Brodiaea minor Robert E. Preston 2015-5-29 2999 El Dorado 2.25 mi SSE of Georgetown, along Bear Creek Rd. 710 Comment
  UCD77157  Brodiaea minor Robert E. Preston 2002-5-24 1806 El Dorado Cool, along SR 193, 0.15 mi e of Hwy 49. 465 Comment
  UCD77210  Brodiaea elegans subsp. elegans Robert E. Preston 2004-5-22 2245 El Dorado Cool, at jct Hwy 49 and SR 193. 464 Comment
  UCD77493  Centaurea sulphurea Robert E. Preston 2002-5-24 1805 El Dorado Along Hwy 49, between Coloma and Pilot Hill 243 Comment
  UCD77992  Scutellaria galericulata Robert E. Preston 1999-8-19 1233 El Dorado At center of Tallac Marsh, T13N R17E SW 1/4 S26 1898 Comment
  JEPS110487  Symphyotrichum frondosum Robert E. Preston 1998-11-4 1200 El Dorado Pope Marsh; On island at N end of marsh. 1898 Comment
  UCD114448  Boechera platysperma Robert E. Preston 1983-8-27 411 El Dorado South Lake Tahoe, 1703 Keller Dr, near side of house. 2098 Comment
  UCD77298  Kyhosia bolanderi Robert E. Preston 1999-8-19 1231 El Dorado Along the western edge of Tallac Marsh. 1898 Comment
  UCD77998  Senecio hydrophilus Robert E. Preston 1999-8-19 1232 El Dorado Along the western edge of Tallac Marsh. 1898 Comment
  UCD78076  Utricularia macrorhiza Robert E. Preston 1999-8-19 1234 El Dorado Tallac Marsh. 1898 Comment
  JEPS106436  Atriplex coronata var. vallicola Robert E. Preston 2001-4-27 1526 Fresno Big Blue Hills, ca. 0.1 mi S of Arroyo Hondo. USGS Lillis Ranch 7.5' quad. 243 Comment
  JEPS106437  Atriplex coronata var. vallicola Robert E. Preston 2001-4-24 1516 Fresno Big Blue Hills, S of Arroyo Honda, ca. 0.8 mi N of Cantua Creek. 237 Comment
  JEPS106438  Atriplex coronata var. vallicola Robert E. Preston 2001-4-26 1518 Fresno Monocine Ridge, 06 mi S of Panoche Creek. 198 Comment
  JEPS106439  Atriplex coronata var. vallicola Robert E. Preston 2002-5-7 1791 Fresno Ciervo Hills, ca. 2.5 ssw of Manning Ave exit on I-5. 309 Comment
  JEPS106440  Atriplex coronata var. vallicola Robert E. Preston 2002-5-7 1796 Fresno Ciervo Hills, Monocline Ridge. 304 Comment
  JEPS106444  Eriogonum vestitum Robert E. Preston 2003-3-28 1945 Fresno Ciervo Hills, E slope of Monocine Ridge. 314 Comment
Read comments Nov 17 2019
  JEPS117732  Plagiobothrys acanthocarpus Robert E. Preston 2008-3-27 2596 Fresno 1 mi SSE of Friant 136 Comment
  SEINET10940795  Chamaesyce ocellata R. E. Preston 2009-8-6 Preston 2710 Fresno Madera Ranch, ca. 10 mi WSW of Madera. 58 Comment
  UCD105207  Atriplex argentea var. expansa Robert E. Preston 2010-10-7 2817 Fresno 4.5 mi SE of Mendota, at Alkali Sink Ecological Reserve. 49 Comment
  UCD105216  Cryptantha corollata Robert E. Preston 2010-4-16 2756 Fresno Ca. 12.5 mi N of Coalinga, in Pine Canyon. 605 Comment
  UCD105219  Cryptantha sparsiflora Robert E. Preston 2010-4-16 2755 Fresno Ca. 12 mi N of Coalinga, in Pine Canyon. 601 Comment
  UCD105281  Madia radiata Robert E. Preston 2010-4-1 2735 Fresno Tumey Hills, 5.0 mi SW of Panoche Rd exit on I-5. 286 Comment
  UCD105284  Madia radiata Robert E. Preston 2010-4-13 2748 Fresno Interior South Coast Ranges, in hills south of Cantua Creek, 4.5 miles W of where the creek crosses Derrick Ave. 328 Comment
  UCD105516  Eriogonum vestitum Robert E. Preston 2010-4-13 2745 Fresno Interior South Coast Ranges, in hills south of Cantua Creek, 4.4 miles W of where the creek crosses Derrick Ave. 321 Comment
  UCD105536  Chaenactis glabriuscula var. heterocarpha Robert E. Preston 2010-4-16 2759 Fresno Ca. 12.5 mi N of Coalinga, in Pine Canyon. 624 Comment
  UCD105537  Acmispon maritimus Robert E. Preston 2010-4-16 2757 Fresno Ca. 12.5 mi N of Coalinga, in Pine Canyon. 624 Comment
  UCD105538  Acmispon wrangelianus Robert E. Preston 2010-4-16 2760 Fresno Ca. 12.5 mi N of Coalinga, in Pine Canyon. 621 Comment
  UCD105545  Layia glandulosa Robert E. Preston 2010-4-16 2762 Fresno Ca. 9.3 mi N of Coalinga, in Diaz Canyon, along San Joaquin Rocks Lookout Rd, 0.75 mi N Los Gatos Creek Rd. 433 Comment
  UCD120422  Phacelia distans Robert E. Preston 2003-3-31 2083 a Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 1 mi S of Arroyo Hondo. 277 Comment
  UCD47507  Quercus wislizeni Robert E. Preston 1999-3-11 1203 Fresno Parkfield Grade, 4.3 mi S of jct with Hwy 198; T22S R14E SW 1/4 S4. (Curry Mountain 7.5' quad.). 594 Comment
  UCD77214  Phacelia vallis-mortae Robert E. Preston 2003-4-1 2084 a Fresno Big Blue Hills, ca. 0.2 mi S of Cantua Creek. 248 Comment
  UCD77215  Phacelia fremontii Robert E. Preston 2003-3-28 2078 Fresno Ciervo Hills, E slope of Monocline Ridge 314 Comment
  UCD77217  Phacelia ciliata Robert E. Preston 2001-4-23 1507 Fresno Big Blue Hills, ca. 0.5 mi n of Domengine Creek. 243 Comment
  UCD77219  Phacelia douglasii Robert E. Preston 2003-3-6 1999 Fresno Ciervo Hills, E slope of Monocline Ridge. 286 Comment
  UCD77220  Phacelia distans Robert E. Preston 2003-3-27 2064 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.35 mi N of Arroyo Hondo. 240 Comment
  UCD77223  Phacelia tanacetifolia Robert E. Preston 2001-4-23 1509 Fresno Big Blue Hills, ca. 0.6 mi s of Salt Creek. 207 Comment
  UCD77224  Mentzelia affinis Robert E. Preston 2003-3-6 1996 Fresno Ciervo Hills, E slope of Monocline Ridge 246 Comment
  UCD77235  Amsinckia intermedia Robert E. Preston 2003-4-2 2087 Fresno Ciervo Hills, ca. 0.8 mi E of Tumey Gulch. 269 Comment
  UCD77240  Amsinckia vernicosa Robert E. Preston 2001-4-27 1522 Fresno Big Blue Hills, ca. 1 mi s of Arroyo Hondo. 304 Comment
  UCD77241  Amsinckia tessellata Robert E. Preston 2003-3-6 2002 b Fresno Ciervo Hills, E slope of Monocline Ridge. 284 Comment
  UCD77243  Amsinckia tessellata Robert E. Preston 2003-3-6 1991 Fresno Ciervo Hills, E slope of Monocline Ridge 265 Comment
  UCD77256  Calochortus clavatus var. pallidus Robert E. Preston 2001-4-27 1525 Fresno Big Blue Hills, ca. 0.4 mi s of Arroyo Hondo. 304 Comment
  UCD77275  Plantago ovata Robert E. Preston 2003-3-7 2008 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.7 mi S of Arroyo Ciervo. 316 Comment
  UCD77280  Plantago ovata Robert E. Preston 2001-4-24 1511 b Fresno Big Blue Hills, between Arroyo Hondo and Cantua Creek. 329 Comment
  UCD77299  Abronia pogonantha Robert E. Preston 2003-3-28 2076 Fresno Ciervo Hills, E slope of Monocline Ridge 314 Comment
Read comments Apr 5 2016
  UCD77313  Allium crispum Robert E. Preston 2003-3-27 2061 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.6 mi N of Arroyo Ciervo 299 Comment
  UCD77341  Apiastrum angustifolium Robert E. Preston 2001-4-24 1515 Fresno Big Blue Hills, ca. 2.8 mi s of Arroyo Hondo, ca. 2 mi n of Cantua Creek 243 Comment
  UCD77384  Atriplex coronata var. vallicola Robert E. Preston 2001-4-26 1519 Fresno Monocline Ridge, ca. 1.6 mi s of Panoche Creek 259 Comment
  UCD77392  Atriplex coronata var. coronata Robert E. Preston 2002-5-7 1795 Fresno Ciervo Hills, Monocline Ridge, ca. 2.2 mi ssw of I-5 at Hudson Ave overcrossing 304 Comment
  UCD77397  Atriplex coronata var. vallicola Robert E. Preston 2001-4-24 1511 Fresno Big Blue Hills, ca. 1.6 mi s of Arroyo Hondo 329 Comment
  UCD77404  Atriplex coronata var. vallicola Robert E. Preston 2002-5-8 1798 Fresno Ciervo Hills, ca. 2 mi w of I-5, ca. 1.2 mi n of Arroyo Hondo,T16N R13E sw 1/4 Section 9 310 Comment
  UCD77440  Camissonia campestris Robert E. Preston 2003-3-27 2065 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.35 mile N of Arroyo Hondo 240 Comment
  UCD77443  Eulobus californicus Robert E. Preston 2003-3-28 2081 Fresno Ciervo Hills, E slope of Monocline Ridge. 314 Comment
  UCD77444  Camissonia campestris Robert E. Preston 2003-4-1 2084 Fresno Big Blue Hills, ca. 0.2 mile S of Cantua Creek 248 Comment
  UCD77515  Chaenactis fremontii Robert E. Preston 2003-3-31 2083 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 1 mi S of Arroyo Hondo 277 Comment
  UCD77556  Clarkia tembloriensis subsp. tembloriensis Robert E. Preston 2003-3-28 2070 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 1.7 miles N of Arroyo Ciervo 307 Comment
  UCD77576  Cryptantha nevadensis Robert E. Preston 2001-4-24 1512 Fresno Big Blue Hills, between Arroyo Hondo and Cantua Creek 292 Comment
  UCD77580  Cryptantha flaccida Robert E. Preston 2001-4-23 1508 Fresno Big Blue Hills, ca. 1 mi n of Martinez Creek 213 Comment
  UCD77595  Delphinium gypsophilum Robert E. Preston 2001-4-24 1520 Fresno Big Blue Hills, ca. 1.6 mi s of Arroyo Hondo 304 Comment
  UCD77596  Delphinium recurvatum Robert E. Preston 2001-4-22 1503 Fresno Ca. 10 mi n of Coalinga, ca. 0.1 mi w of Derrick Ave., along drainage 219 Comment
  UCD77599  Delphinium gypsophilum Robert E. Preston 2001-4-22 1506 Fresno Ca. 11 mi n of Coalinga 252 Comment
  UCD77610  Eastwoodia elegans Robert E. Preston 2001-4-24 1513 Fresno Big Blue Hills, between Arroyo Hondo and Cantua Creek 280 Comment
  UCD77611  Eastwoodia elegans Robert E. Preston 2002-5-8 1800 Fresno Ciervo Hills, ca. 2 mi w of I-5, ca. 1.7 mi n of Arroyo Hondo 352 Comment
  UCD77635  Eremalche parryi Robert E. Preston 2003-3-7 2003 Fresno Ciervo Hills, E slope of Monocline Ridge. 300 Comment
  UCD77651  Eriogonum gracillimum Robert E. Preston 2003-4-22 2111 Fresno Tumey Hills, ca. 1.2 N of Tumey Gulch 262 Comment
  UCD77652  Eriogonum gossypinum Robert E. Preston 2001-4-24 1514 Fresno Big Blue Hills, ca. 2.8 mi s of Arroyo Hondo, ca. 2 mi n of Cantua Creek 243 Comment
  UCD77653  Eriogonum ordii Robert E. Preston 2003-4-3 2088 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 3.5 mi N of Arroyo Ciervo 283 Comment
  UCD77654  Eriogonum viridescens Robert E. Preston 2003-3-28 2075 Fresno Ciervo Hills, E slope of Monocline Ridge 314 Comment
  UCD77659  Eriogonum gossypinum Robert E. Preston 2003-3-27 2056 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.6 mi S of Arroyo Ciervo 326 Comment
  UCD77664  Eriogonum vestitum Robert E. Preston 2002-4-12 1785 Fresno Tumey Hills, 2.8 miles sw of jct Panoche Rd and I-5 324 Comment
  UCD77670  Eriogonum vestitum Robert E. Preston 2002-5-6 1789 Fresno Panoche Hills, ca. 2.4 mi se of Little Panoche Reservoir, T13S R11E nw 1/4 Section 34 268 Comment
Read comments Apr 18 2016
  UCD77671  Eriogonum gossypinum Robert E. Preston 2002-5-8 1801 Fresno Ciervo Hills, ca. 2 mi w of I-5, ca. 0.2 mi n of Arroyo Ciervo 321 Comment
  UCD77672  Eriogonum viridescens Robert E. Preston 2001-4-27 1523 Fresno Big Blue Hills, ca. 1 mi s of Arroyo Hondo 280 Comment
  UCD77676  Eriogonum angulosum Robert E. Preston 2003-3-27 2062 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.1 mi N of Arroyo Hondo 243 Comment
  UCD77677  Eriogonum vestitum Robert E. Preston 2003-3-28 2071 Fresno Ciervo Hills, E slope of Monocline Ridge 346 Comment
Read comments Apr 14 2016
  UCD77718  Eschscholzia lemmonii Robert E. Preston 2001-4-23 1510 Fresno Big Blue Hills, ca. 0.6 mi s of Salt Creek 207 Comment
  UCD77721  Eschscholzia lemmonii Robert E. Preston 2003-3-7 2007 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.7 mi S of Arroyo Ciervo 316 Comment
  UCD77724  Logfia gallica Robert E. Preston 2003-3-31 2082 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 1.3 mi S of Arroyo Hondo 310 Comment
  UCD77726  Logfia filaginoides Robert E. Preston 2003-3-27 2066 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.35 mi N of Arroyo Hondo 240 Comment
  UCD77741  Gilia tricolor subsp. diffusa Robert E. Preston 2003-4-3 2092 Fresno Big Blue Hills, ca. 0.6 mi N of Domengine Creek 277 Comment
  UCD77776  Hollisteria lanata Robert E. Preston 2003-3-27 2060 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.15 mi N of Arroyo Ciervo 324 Comment
  UCD77780  Hordeum depressum Robert E. Preston 2003-3-27 2063 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.1 mi N of Arroyo Hondo. 243 Comment
  UCD77789  Rostraria cristata Robert E. Preston 2003-3-27 2067 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 1 mi S of Arroyo Ciervo 326 Comment
  UCD77793  Lastarriaea coriacea Robert E. Preston 2003-3-27 2068 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.4 mi N of Arroyo Hondo 222 Comment
  UCD77806  Lepidium dictyotum Robert E. Preston 2003-3-7 2005 Fresno Ciervo Hills, E slope of Monocline Ridge 278 Comment
  UCD77832  Loeseliastrum schottii Robert E. Preston 2003-4-3 2090 Fresno Ciervo Hills, Monocline Ridge. 411 Comment
  UCD77839  Lupinus nanus Robert E. Preston 2003-4-3 2093 Fresno Big Blue Hills, ca. 0.6 mi S of Martinez Creek. 225 Comment
  UCD77841  Lupinus microcarpus var. microcarpus Robert E. Preston 2003-3-28 2077 Fresno Ciervo Hills, E slope of Monocline Ridge. 314 Comment
  UCD77860  Microseris douglasii subsp. douglasii Robert E. Preston 2003-3-27 2059 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.15 mi S of Arroyo Ciervo 323 Comment
  UCD77863  Microseris elegans Robert E. Preston 2001-4-22 1502 Fresno Ca. 9.4 mi nne of Coalinga, ca. 1 mi e of Skunk Hollow 211 Comment
  UCD77865  Microseris campestris Robert E. Preston 2003-3-7 2004 Fresno Ciervo Hills, E slope of Monocline Ridge 278 Comment
  UCD77873  Monolepis nuttalliana Robert E. Preston 2003-3-6 2001 Fresno Ciervo Hills, E slope of Monocline Ridge 274 Comment
  UCD77875  Monolopia lanceolata Robert E. Preston 2003-3-6 1994 Fresno Ciervo Hills, E slope of Monocline Ridge 263 Comment
  UCD77877  Mucronea perfoliata Robert E. Preston 2003-4-3 2091 Fresno Ciervo Hills, Monocline Ridge 390 Comment
  UCD77886  Oenothera deltoides subsp. cognata Robert E. Preston 2003-3-6 2000 Fresno Ciervo Hills, E slope of Monocline Ridge. 286 Comment
  UCD77986  Salvia columbariae Robert E. Preston 2003-3-28 2079 Fresno ciervo Hills, E slope of Monocline Ridge. 314 Comment
  UCD77987  Salvia carduacea Robert E. Preston 2003-3-7 2006 Fresno Ciervo Hills, E slope of Monocline Ridge 309 Comment
  UCD78045  Trifolium microcephalum Robert E. Preston 2003-4-2 2086 Fresno Tumey Hills, ca. 0.6 mi N of Tumey Gulch 252 Comment
  UCD78052  Trifolium willdenovii Robert E. Preston 2003-3-6 1997 Fresno Ciervo Hills, E slope of Monocline Ridge 240 Comment
  UCD78134  Caulanthus lasiophyllus Robert E. Preston 2003-3-6 1993 Fresno Ciervo Hills, E slope of Monocline Ridge 256 Comment
  UCD78139  Stylocline gnaphaloides Robert E. Preston 2008-3-24 2590 Fresno 1.6 mi SSW of Panoche Rd exit on I-5, along N bank of Panoche Creek 154 Comment
  UCD78140  Bromus arizonicus Robert E. Preston 2008-3-24 2591 Fresno 1.6 mi SSW of Panoche Rd exit on I-5, along N bank of Panoche Creek 154 Comment
  UCD78145  Plagiobothrys distantiflorus Robert E. Preston 2008-3-27 2597 Fresno 1 mi SSE of Friant. 137 Comment
  UCD78158  Psilocarphus tenellus var. tenellus Robert E. Preston 2008-4-17 2610 Fresno Piedra, Tivy Mtn Preserve 254 Comment
  UCD78160  Convolvulus simulans Robert E. Preston; Brad Schafer 2008-4-17 2612 Fresno Piedra, Tivy Mtn Preserve 255 Comment
  UCD78161  Oxalis micrantha Robert E. Preston 2008-4-17 2613 Fresno Piedra 167 Comment
  UCD78162  Brodiaea appendiculata Robert E. Preston 2008-4-17 2614 Fresno 5.3 mi NE of Clovis, 0.5 mi N of Tollhouse Rd (Hwy 168). 135 Comment
  UCD78163  Cryptantha clevelandii Robert E. Preston 2008-4-18 2615 Fresno Tumey Hills, 5.64 mi SW of jct Panoche Rd and I-5 255 Comment
  UCD78165  Lepidium jaredii Robert E. Preston 2008-4-18 2617 Fresno Tumey Hills, 5.07 mi SW of jct Panoche Rd and I-5. 281 Comment
  UCD78177  Eryngium castrense Robert E. Preston 2008-5-8 2629 Fresno 4 mi SE of Squaw Valley, on N side of Ennis Rd 341 Comment
  UCD84720  Euphorbia ocellata subsp. arenicola Robert E. Preston 2009-8-6 2706 Fresno Alkali Sink Ecological Reserve, ca. 4.6 mi ESE of Mendota. 49 Comment
  UCD84721  Trichostema ovatum Robert E. Preston 2009-8-6 2707 Fresno Alkali Sink Ecological Reserve, ca. 4.6 mi ESE of Mendota. 49 Comment
  UCD84722  Atriplex minuscula Robert E. Preston 2009-8-6 2708 Fresno Alkali Sink Ecological Reserve, ca. 4.6 mi ESE of Mendota. 49 Comment
  UCD84723  Atriplex cordulata Robert E. Preston 2009-8-6 2709 Fresno Alkali Sink Ecological Reserve, ca. 4.6 mi ESE of Mendota. 49 Comment
  UCD84724  Euphorbia ocellata Robert E. Preston 2009-8-6 2710 Fresno Madera Ranch, ca. 10 mi WSW of Madera. 57 Comment
  UCD93950  Vulpia microstachys var. confusa Robert E. Preston 2003-3-7 2009 Fresno Ciervo Hills, E slope of Monocline Ridge, ca. 0.3 mi N of Arroyo Hondo. Comment
  UCD96070  Platystemon californicus Robert E. Preston 2003-3-6 1995 Fresno Ciervo Hills, E slope of Monocline Ridge. Comment
  UCR148770  Quercus wislizeni Robert E. Preston 1999-3-11 1203 Fresno Parkfield grade, 4.3 mi south of junction with Hwy 198 595 Comment
  UCR224888  Euphorbia ocellata Robert E. Preston 2009-8-6 2706 Fresno Alkali Sink Ecological Reserve, c. 4.6 mi east southeast of Mendota 49 Comment
  CHSC35635  Thysanocarpus laciniatus R. E. Preston 1982-4-6 219 Glenn Ca. 200 ft s of Salt Creek, ca. 4 mi w of Newville. 335 Comment
  CHSC35636  Streptanthus glandulosus R. E. Preston 1982-4-6 220 Glenn Ca. 1/4 mi s of Salt Creek, ca. 4 mi w of Newville. 396 Comment
  CHSC96040  Dittrichia graveolens Robert E. Preston 2006-10-27 2412 Glenn Glenn County. 3.5 miles S of Winters, along I-5. 34 Comment
  UCD115628  Thysanocarpus laciniatus Robert E. Preston 1982-4-6 219 Glenn 200 ft S of Salt Creek, ca. 4 miles W of Newville. 335 Comment
  UCD77497  Centromadia parryi subsp. parryi Robert E. Preston 1999-9-24 1243 Glenn Along Road 303, from 3.1 to 3.4 mi N of Indian Valley School in Stonyford. 350 Comment
  UCD97402  Atriplex depressa Robert E. Preston; Graham Preston 1994-8-20 681 Glenn Sacramento National Wildlife Refuge, 1 mile NE of headquarters. Comment
  UCD97414  Atriplex fruticulosa Robert E. Preston 1994-8-13 680 Glenn Sacramento National Wildlife Refuge, 2 miles SE of headquarters. Comment
  HSC10066  Glyceria elata T. O. Preston 1963-5-12 50 Humboldt Essex pond Comment
  HSC10687  Poa confinis T. O. Preston 1963-5-6 22 Humboldt Sand dunes. Comment
  HSC10701  Poa douglasii T. O. Preston 1963-5-6 42 Humboldt Sand dunes Comment
  HSC9738  Elymus mollis subsp. mollis T. O. Preston 1963-5-6 21 Humboldt Sand dunes. Comment
  UCD84700  Streptanthus tortuosus Robert E. Preston 2009-5-27 2681 Humboldt 5.9 mi S of Weitchpec, along Hwy 96. 188 Comment
  HSC36314  Potamogeton natans L. Preston 1973-5-19 Humboldt 2 mi. W Arcata Comment
  UCD56345  Aristida californica Robert E. Preston 1997-11-13 1074 Imperial Imperial Dunes. 91 Comment
  UCD61083  Dasyochloa pulchella Robert E. Preston 1997-12-11 1080 Imperial 2.9 mi. SSE of Palo Verde Peak. Comment
  UCD77415  Atriplex elegans var. fasciculata Robert E. Preston 2006-5-4 2379 Imperial Ca. 2.9 mi E of Tarantula Wash, ca. 300 ft S of Hwy 78 -7 Comment
  UCD77425  Boerhavia wrightii Robert E. Preston 1997-11-13 1069 Imperial Mesquite Mine 243 Comment
  UCD77518  Euphorbia setiloba Robert E. Preston 1997-11-12 1067 Imperial Mesquite Mine 242 Comment
  UCD77522  Euphorbia pediculifera Robert E. Preston 1997-12-11 1078 Imperial 2.9 mi sse of Palo Verde Peak, along unnamed wash 121 Comment
  UCD77588  Dalea mollis Robert E. Preston 1997-12-11 1077 Imperial Mesquite Mine 243 Comment
  UCD77589  Dalea mollissima Robert E. Preston 1997-11-13 1071 Imperial Mesquite Mine. 213 Comment
  UCD77604  Ditaxis serrata Robert E. Preston 1997-11-13 1070 Imperial Mesquite Mine. 231 Comment
  UCD77787  Kallstroemia californica Robert E. Preston 1997-11-13 1073 Imperial Imperial Dunes. 91 Comment
  UCD77790  Krameria erecta Robert E. Preston 1997-12-11 1076 Imperial Mesquite Mine. 243 Comment
  UCD77868  Mirabilis laevis var. villosa Robert E. Preston 1997-11-12 1068 Imperial Mesquite Mine. 243 Comment
  UCD78038  Tiquilia canescens var. pulchella Robert E. Preston 1997-11-13 1072 Imperial Imperial Co.; Mesquite Mine, NW 1/4 Section 6 251 Comment
  CAS-BOT-BC170081  Atriplex vallicola Robert E. Preston 1998-6-13 1126 Kern Ca. 2.9 mi NW of McKittrick, on hillside 100 ft S of Reward Rd 381 Comment
  JEPS113987  Cryptantha sparsiflora Robert E. Preston 2007-5-24 2541 Kern 4.8 mi E of glennvile, along Hwy 155. Comment
  JEPS113988  Eryngium spinosepalum Robert E. Preston 2007-5-17 2532 Kern Ca. 2.75 mi NW of Woody, in roadside swale. Comment
Read comments Jun 14 2016
  JEPS113990  Packera breweri Robert E. Preston 2007-5-17 2529 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, on Geghus Ridge. Comment
  JEPS113991  Sidalcea sparsifolia Robert E. Preston 2007-5-16 2528 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, on Geghus Ridge. Comment
  JEPS113992  Vicia americana Robert E. Preston 2007-5-16 2527 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, on Geghus Ridge. Comment
  JEPS113993  Scrophularia californica subsp. floribunda Robert E. Preston 2007-5-16 2526 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS113995  Yabea microcarpa Robert E. Preston 2007-5-16 2523 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS113997  Ranunculus cymbalaria var. saximontanus Robert E. Preston 2007-5-15 2519 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS113998  Meconella linearis Robert E. Preston 2007-5-15 2518 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114000  Distichlis spicata Robert E. Preston 2007-5-15 2516 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114019  Eriogonum saxatile Robert E. Preston 2007-5-15 2512 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114021  Nemophila parviflora var. quercifolia Robert E. Preston 2007-5-14 2501 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114022  Clarkia heterandra Robert E. Preston 2007-5-15 2502 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114023  Delphinium gracilentum Robert E. Preston 2007-5-15 2503 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114024  Lithophragma bolanderi Robert E. Preston 2007-5-15 2504 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114025  Collinsia childii Robert E. Preston 2007-5-15 2505 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114026  Mimulus palmeri Robert E. Preston 2007-5-15 2507 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114027  Arctostaphylos parryana Robert E. Preston 2007-5-15 2508 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114029  Monardella linoides subsp. oblonga Robert E. Preston 2007-7-2 2566 Kern Tehachapi Mtns, 4 mi E of Lebec. Comment
  JEPS114030  Pseudognaphalium californicum Robert E. Preston 2007-7-2 2564 Kern Tehachapi Mtns, 2.0 mi E of Grapevine Peak. Comment
  JEPS114033  Cryptantha muricata Robert E. Preston 2007-5-16 2525 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114034  Cryptantha sparsiflora Robert E. Preston 2007-5-17 2530 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, on Geghus Ridge. Comment
  JEPS114036  Rumex violascens Robert E. Preston 2007-7-2 2563 Kern Tehachapi Mtns, 2.0 mi E of Grapevine Peak. Comment
  JEPS114039  Camissonia campestris Robert E. Preston 2007-4-23 2442 a Kern Tehachapi Mtns, 1.8 mi NE of Lebec, in Rising Canyon Comment
  JEPS114040  Githopsis specularioides Robert E. Preston 2007-5-16 2520 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114041  Triteleia ixioides subsp. scabra Robert E. Preston 2007-5-14 2499 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114045  Cryptantha microstachys Robert E. Preston 2007-5-15 2511 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114048  Lomatium dissectum var. multifidum Robert E. Preston 2007-4-25 2467 Kern Tehachapi Mtns, 3.6 mi ENE of Lebec. Comment
  JEPS114049  Lotus strigosus Robert E. Preston 2007-5-14 2500 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114051  Lomatium dissectum var. multifidum Robert E. Preston 2007-4-25 2467 Kern Tehachapi Mtns, 3.6 mi ENE of Lebec. Comment
  JEPS114052  Lomatium californicum Robert E. Preston 2007-5-14 2498 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114053  Lomatium californicum Robert E. Preston 2007-5-14 2498 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS114058  Melica imperfecta Robert E. Preston 2007-4-24 2453 Kern Tehachapi Mtns, 2.75 mi ENE of Lebec. Comment
  JEPS114060  Bowlesia incana Robert E. Preston 2007-4-24 2455 Kern Tehachapi Mtns, 2.75 mi ENE of Lebec. Comment
  JEPS114062  Trifolium gracilentum var. gracilentum Robert E. Preston 2007-4-24 2446 Kern Tehachapi Mtns, 3 mi ENE of Lebec. Comment
  JEPS114063  Stellaria nitens Robert E. Preston 2007-4-24 2449 Kern Tehachapi Mtns, 3.3 mi ENE of Lebec. Comment
  JEPS114064  Ranunculus canus var. ludovicianus Robert E. Preston 2007-4-24 2448 Kern Tehachapi Mtns, 3.25 mi ENE of Lebec. Comment
  JEPS114066  Trifolium albopurpureum Robert E. Preston 2007-4-24 2445 Kern Tehachapi Mtns, 3 mi ENE of Lebec. Comment
  JEPS114068  Caulanthus coulteri var. coulteri Robert E. Preston 2007-4-23 2443 Kern Tehachapi Mtns, 1.8 mi NE of Lebec, in Rising Canyon Comment
  JEPS114069  Mentzelia veatchiana Robert E. Preston 2007-4-23 2442 Kern Tehachapi Mtns, 1.8 mi NE of Lebec, in Rising Canyon Comment
  JEPS114070  Camissonia strigulosa Robert E. Preston 2007-4-23 2441 Kern Tehachapi Mtns, 1.8 mi NE of Lebec, in Rising Canyon. Comment
  JEPS114071  Gilia brecciarum subsp. brecciarum Robert E. Preston 2007-4-23 2439 Kern Tehachapi Mtns, 1.8 mi NE of Lebec, in Rising Canyon. Comment
  JEPS114072  Linanthus parviflorus Robert E. Preston 2007-4-23 2438 Kern Tehachapi Mountains, 1.8 mi NE of Lebec, in Rising Canyon Comment
  JEPS114073  Draba verna Robert E. Preston 2007-4-23 2437 Kern Tehachapi Mountains, 1.8 mi NE of Lebec, in Rising Canyon Comment
  JEPS114075  Tauschia hartwegii Robert E. Preston 2007-4-24 2451 Kern Tehachapi Mtns, 3.3 mi ENE of Lebec. Comment
  JEPS114077  Koeleria macrantha Robert E. Preston 2007-4-24 2452 Kern Tehachapi Mtns, 2.75 mi ENE of Lebec. Comment
  JEPS114078  Agoseris heterophylla Robert E. Preston 2007-4-24 2457 Kern Tehachapi Mtns, 2.75 mi ENE of Lebec. Comment
  JEPS114080  Filago californica Robert E. Preston 2007-4-24 2458 Kern Tehachapi Mtns, 2.8 mi ENE of Lebec. Comment
  JEPS114081  Trifolium ciliolatum Robert E. Preston 2007-4-24 2459 Kern Tehachapi Mtns, 3.1 mi ENE of Lebec. Comment
  JEPS114084  Gilia brecciarum subsp. neglecta Robert E. Preston 2007-4-27 2469 Kern Tehachapi Mtns, 0.7 mi E of Lebec. Comment
  JEPS114085  Pellaea mucronata Robert E. Preston 2007-4-25 2465 Kern Tehachapi Mtns, 3.5 mi ENE of Lebec. Comment
  JEPS114086  Cardamine californica var. brevistyla Robert E. Preston 2007-4-25 2466 Kern Tehachapi Mtns, 3.4 mi ENE of Lebec. Comment
  JEPS114087  Micropus californicus Robert E. Preston 2007-4-25 2463 Kern Tehachapi Mtns, 3.9 mi ENE of Lebec. Comment
  JEPS114088  Stylocline gnaphaloides Robert E. Preston 2007-4-25 2464 Kern Tehachapi Mtns, 3.9 mi ENE of Lebec. Comment
  JEPS114089  Saxifraga californica Robert E. Preston 2007-4-25 2461 Kern Tehachapi Mtns, 4 mi ENE of Lebec. Comment
  JEPS114090  Melica californica Robert E. Preston 2007-5-14 2497 Kern Tehachapi Mtns, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. Comment
  JEPS121884 Image available Eriogonum callistum Robert E. Preston 2006-5-26 2400 Kern Tehachapi Mountains, 4.3 mi E of Lebec Comment
  NY990639  Eriogonum callistum R. Preston 2006-5-26 2400 Kern Tehachapi Mountains, 4.3 mi. E of Lebec 1412 Comment
Read comments Jul 24 2014
  SEINET10680447  Eriogonum callistum R. E. Preston 2007-7-2 Preston 2565 Kern Tehachapi Mtns, 4 mi E of Lebec. 1470 Comment
  SEINET11265495  Atriplex minuscula Robert E. Preston 2009-7-10 2705 Kern 9 miles W of Shafter, ca. 0.4 miles S of Lerdo Hwy.; 0 79 Comment
  UCD105226  Claytonia parviflora Robert E. Preston 2010-3-31 2730 Kern E slope of Temblor Ranges, 0.9 mi NW of Temblor Ranch. 501 Comment
  UCD105233  Rostraria cristata Robert E. Preston 2010-3-31 2727 Kern Temblor Valley, E of Cymric Oil Fields. 267 Comment
  UCD105244  Hesperocnide tenella Robert E. Preston 2010-3-31 2729 Kern E slope of Temblor Ranges, 0.9 mi NW of Temblor Ranch. 501 Comment
  UCD105510  Stylocline gnaphaloides Robert E. Preston 2010-4-22 2765 Kern Elk Hills, 7.2 mi S of Buttonwillow. 314 Comment
  UCD105512  Plagiobothrys acanthocarpus Robert E. Preston 2010-4-23 2774 Kern Temblor Range, 6.6 mi ENE of Simmler. 1094 Comment
  UCD105535  California macrophylla Robert E. Preston 2010-4-23 2773 Kern Temblor Range, 6.8 mi ENE of Simmler. 1068 Comment
  UCD105570  Navarretia mitracarpa Robert E. Preston 2010-5-19 2790 Kern Temblor Range, 6.3 mi ENE of Simmler. 1176 Comment
  UCD146983  Cryptantha nevadensis var. rigida Robert E. Preston 2010-3-31 2728 Kern E slope of Temblor Ranges, 0.9 mi NW of Temblor Ranch. 501 Comment
  UCD54252  Quercus X morehus Robert E. Preston 2005-5-20 2346 Kern Tehachapi Mountains, Bear Trap Canyon. 1118 Comment
  UCD77409  Atriplex coronata var. vallicola Robert E. Preston 1998-6-13 1125 Kern ca. 1 mi S of McKittrick, 300 ft E of Hwy 33, on E-facing slope 396 Comment
  UCD77414  Atriplex subtilis Robert E. Preston 1999-10-12 1248 Kern Ca. 0.5 mi NE of Interstate 5, at the Buttonwillow truck stop. T29S R24E NW 1/4 of SW 1/4 Sec 15 88 Comment
  UCD77506  Centromadia pungens Robert E. Preston 1999-7-8 1223 Kern 2.9 mi W of McKittrick, along Reward Rd. 373 Comment
  UCD77508  Centromadia pungens Robert E. Preston 1999-5-6 1211 Kern 1.6 mi E of Buttonwillow, in field on N side of Hwy 58. 87 Comment
  UCD77581  Cryptantha oxygona Robert E. Preston 2005-5-18 2345 Kern Ca. 1 mi NE of Lebec 1400 Comment
  UCD77597  Delphinium gypsophilum Robert E. Preston 1999-5-6 1212 Kern E slope of Temblor Range, ca. 3 mi N of McKittrick Summit, along Hwy 58, T30S R20E NE 1/4 Section 12 792 Comment
  UCD77666  Eriogonum nudum var. indictum Robert E. Preston 1999-8-30 1238 Kern Ca. 1 mi SW of McKittrick, along Hwy 58, T30S R22E NW 1/4 S29 396 Comment
  UCD77717  Eschscholzia lemmonii Robert E. Preston 1998-4-11 1094 Kern 3 mi SW of Maricopa 426 Comment
  UCD77755  Deinandra pallida Robert E. Preston 1998-4-11 1093 Kern 5 mi SW of Maricopa 685 Comment
  UCD78143  Bromus berteroanus Robert E. Preston 2008-3-26 2594 Kern Ca. 3 mi W of Buttonwillow, at jct Hwy 58 and Lokern Rd 84 Comment
  UCD78144  Eremalche exilis Robert E. Preston 2008-3-26 2595 Kern 2.3 mi N of McKittrick, where power lines cross Hwy 33. 233 Comment
  UCD78152  Microseris sylvatica Robert E. Preston 2008-4-9 2604 a Kern Ca. 6.5 mi SW of Woody, on ridge ca. 0.15 mi S of Five Dog Creek 352 Comment
  UCD78154  Navarretia nigelliformis subsp. nigelliformis Robert E. Preston 2008-4-9 2605 Kern 3.3 mi W of Granite Station, ca. 0.25 mi S of Granite Rd, ca. 300 ft E of power lines 420 Comment
  UCD78155  Delphinium recurvatum Robert E. Preston 2008-4-10 2606 Kern 4.5 mi SW of Granite Station, 2.75 mi S of Granite Road, 300 ft E of power lines. 301 Comment
  UCD78156  Caulanthus coulteri Robert E. Preston 2008-4-10 2608 Kern 2.2 miles SE of Mt Poso. 317 Comment
  UCD78241  Atriplex cordulata var. erecticaulis Robert E. Preston 2008-7-22 2643 Kern 9 mi W of Shafter, ca. 0.4 mi S of the Lerdo Hwy. 79 Comment
Read comments Aug 12 2016
  UCD80878  Mimulus constrictus Robert E. Preston 2007-5-15 2510 Kern Tehachapi Mountains, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. 1295 Comment
  UCD80880  Delphinium gracilentum Robert E. Preston 2007-5-15 2503 Kern Tehachapi Mountains, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. 1191 Comment
  UCD80881  Nemophila pulchella var. fremontii Robert E. Preston 2007-5-15 2501 Kern Tehachapi Mountains, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. 1176 Comment
  UCD80882  Melica californica Robert E. Preston 2007-5-14 2497 Kern Tehachapi Mountains, ca. 9.3 mi ENE of Lebec, in Bear Trap Canyon. 1202 Comment
  UCD84692  Plantago ovata var. fastigiata Robert E. Preston 2009-3-25 s.n. Kern SW San Joaquin Valley, ca. 12 mi W of Buttonwillow. 179 Comment
  UCD84719  Atriplex minuscula Robert E. Preston 2009-7-10 2705 Kern Ca. 9 mi W of Shafter, ca. 0.4 mi S of Lerdo Hwy. 79 Comment
  JEPS110480  Nama stenocarpa Robert E. Preston 1999-3-26 1205 Kings Ca. 1 mi W f Guernsey, SW of intersection Kansas Ave and 11th Ave. 60 Comment
  UCD105517  Atriplex coronata var. vallicola Robert E. Preston 2010-4-15 2754 Kings Ca. 15 mi S of Kettleman City, ca. 0.3 mi E of I-5. 67 Comment
  UCD105530  Eriogonum temblorense Robert E. Preston 2010-4-14 2750 Kings Reef Ridge, in Big Tar Canyon, ca. 4.8 mi SSW of Avenal. 409 Comment
  UCD146984  Cryptantha nevadensis var. rigida Robert E. Preston 2010-4-14 2751 Kings Reef Ridge, in Big Tar Canyon, ca. 4.9 mi SSW of Avenal. 425 Comment
  UCD166849  Euphorbia serpillifolia subsp. serpillifolia Robert E. Preston 2016-8-3 3069 Kings 5.2 mi WNW of Goshen, in field S of Cross Creek. 80 Comment
  UCD166851  Mollugo verticillata Robert E. Preston 2016-8-3 3067 Kings 4.5 mi NW of Goshen, along channel of Cross Creek. 79 Comment
  UCD166852  Cucurbita palmata Robert E. Preston 2016-8-3 3066 Kings 4.5 mi NW of Goshen, 1.8 mi W of Hwy 99, adjacent to S bank of Cross Creek. 81 Comment
  UCD77393  Atriplex serenana Robert E. Preston 2002-9-12 1948 Kings 12 mi W of Tulare, at jct Kansas Ave and 6th Ave 70 Comment
  UCD78141  Cryptantha simulans Robert E. Preston 2008-3-24 2592 Kings Kettleman Hills, 5 mi E of Avenal 288 Comment
  UCD78142  Cryptantha flaccida Robert E. Preston 2008-3-24 2593 Kings Kettleman Hills, 5 mi E of Avenal 288 Comment
  UCD110472  Hesperolinon adenophyllum Robert E. Preston 1995-6-6 870 Lake ca. 1.5 mi nw of Lucerne, along Bartlett Springs Rd., ca. 0.9 mi from Hwy 20. 518 Comment
  UCD116034  Streptanthus morrisonii Robert E. Preston 1986-9-15 548 Lake White Point, on Livermore Road, 2 miles east of its junction with Highway 29. 731 Comment
  UCD132638  Harmonia hallii Robert E. Preston 1995-6-7 871 Lake along Bartlett Springs Rd., at north end of Indian Valley Reservoir. Comment
  UCD147008  Juncus hemiendytus var. hemiendytus Robert E. Preston 2011-5-2 2853 Lake Manning Flat. 562 Comment
  UCD147009  Pectocarya pusilla Robert E. Preston 2011-5-3 2854 Lake SE edge of Manning Flat. 571 Comment
  UCD147010  Stellaria nitens Robert E. Preston 2011-5-3 2855 Lake SE edge of Manning Flat. 571 Comment
  UCD147011  Dichelostemma capitatum Robert E. Preston 2011-5-3 2856 Lake SE edge of Manning Flat. 568 Comment
  UCD147012  Dichelostemma capitatum Robert E. Preston 2011-5-4 2857 Lake Shaul Valley, in field N of SR 29. 544 Comment
  UCD147013  Limnanthes floccosa subsp. floccosa Robert E. Preston; Brad Schafer 2011-5-4 2858 Lake SW edge of Shaul Valley, 0.3 mi W of jct SR 29 and SR 175. 542 Comment
  UCD147014  Collinsia sparsiflora var. collina Robert E. Preston 2011-5-4 2859 Lake S end of Shaul Valley, along S side of SR 29, 300 ft W of its jct with SR 175. 554 Comment
  UCD148247  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-4-6 2908 Lake 4.5 mi WNW of Middletown, along side of Hwy 175. 494 Comment
  UCD148248  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-4-6 2909 Lake Kelseyville, in vacant lot at SW corner of Main St and Douglas Rd. 430 Comment
  UCD166861  Navarretia intertexta subsp. intertexta Robert E. Preston 2016-6-10 3054 Lake 0.3 mi N of Seigler Springs, along Seigler Springs Rd. 709 Comment
  UCD166862  Streptanthus vimineus Robert E. Preston 2016-6-10 3053 Lake 0.3 mi S of Howard Springs, along Big Canyon Rd. 632 Comment
  UCD166863  Streptanthus hesperidis Robert E. Preston 2016-6-10 3052 Lake 2.2 mi N of Middleton, along Big Canyon Rd. 330 Comment
  UCD166871  Streptanthus glandulosus subsp. glandulosus Robert E. Preston 2016-3-26 3045 Lake 2.3 mi W of Lakeport, along SR 175. 432 Comment
  UCD77669  Eriogonum dasyanthemum Robert E. Preston 2002-6-17 1819 Lake Floodplain of Stanton Creek, at n end of Indian Valley Reservoir. 451 Comment
  UCD80867  Pogogyne floribunda Robert E. Preston 2007-7-8 2570 Lassen Big Valley Mtns, 0.4 mi NE of Big Valley Summit, along Hwy 299. 1396 Comment
  UCD77121  Calystegia peirsonii Robert E. Preston 1998-6-19 1151 Los Angeles CA. 1.3 mi N of Sleepy Valley. 780 Comment
  UCD77447  Camissoniopsis intermedia Robert E. Preston 1998-6-19 1149 Los Angeles Mint Canyon, ca. 0.5 mile N of Sierra Hwy 804 Comment
  UCD77465  Carex alma Robert E. Preston 1998-6-19 1152 Los Angeles Rowher Canyon, ca. 1.3 mi N of Sleepy Valley 792 Comment
  UCD100742  Claytonia perfoliata Robert E. Preston 1995-3-12 710 Los Angeles Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  JEPS110490  Amsinckia eastwoodiae Robert E. Preston 2005-3-4 2311 Madera 8.3 mi SW of Madera. 61 Comment
  JEPS110492  Amsinckia eastwoodiae Robert E. Preston 2005-4-15 2334 Madera 8.8 mi SW of Madera. 61 Comment
  JEPS110498  Amaranthus palmeri Robert E. Preston 2004-8-26 2279 Madera 1.8 mi W of Madera, at jct Rd 23 and Ave 14 1/2. 74 Comment
  JEPS114057  Lessingia nemaclada Robert E. Preston 2007-9-14 2576 Madera Ca. 11.6 mi WSW of Madera. Comment
  JEPS98239  Dittrichia graveolens Robert E. Preston 1997-12-4 1075 Madera between Chowchilla Blvd and Hwy 99 Chowchilla 75 Comment
  JEPS98248  Lepidium nitidum var. oreganum R. E. Preston 2000-4-7 1323 Madera 10 mi sw of Madera; Madera Ranch 56 Comment
  JEPS98249  Lepidium nitidum var. oreganum R. E. Preston 2000-4-7 1326 Madera 10 mi sw of Madera; Madera Ranch 54 Comment
  JEPS98250  Lepidium dictyotum R. E. Preston 2000-4-7 1324 Madera 10 mi sw of Madera; Madera Ranch 56 Comment
  JEPS98253  Atriplex cordulata R. E. Preston 2000-6-5 1369 Madera 8 mi sw of Madera; Madera Ranch 57 Comment
  JEPS98254  Atriplex persistens R. E. Preston 2000-4-7 1385 Madera 9.5 mi SW Madera; Madera Ranch 55 Comment
  JEPS98256  Eryngium R. E. Preston 2000-6-5 1370 Madera 9 mi sw of Madera; Madera Ranch 56 Comment
  UCD147857  Streptanthus tortuosus var. foliosus Robert E. Preston 2013-9-17 2924 Madera 2.9 mi NE of North Fork, elev. 4,730 ft. 1442 Comment
  UCD148255  Viola macloskeyi Robert E. Preston 2013-7-16 2917 Madera Corral Meadow, ca. 3.6 mi S of Shuteye Peak. 1911 Comment
  UCD148257  Spiranthes porrifolia Robert E. Preston 2013-7-16 2919 Madera Corral Meadow, ca. 3.6 mi S of Shuteye Peak. 1911 Comment
  UCD148258  Galium trifidum subsp. columbianum Robert E. Preston 2013-7-16 2920 Madera Corral Meadow, ca. 3.6 mi S of Shuteye Peak. 1911 Comment
  UCD148259  Platanthera sparsiflora Robert E. Preston 2013-7-16 2921 Madera Corral Meadow, ca. 3.6 mi S of Shuteye Peak. 1911 Comment
  UCD148260  Gentianopsis simplex Robert E. Preston 2013-7-16 2922 Madera Corral Meadow, ca. 3.6 mi S of Shuteye Peak. 1911 Comment
  UCD148261  Carex echinata subsp. echinata Robert E. Preston 2013-7-16 2923 Madera Corral Meadow, ca. 3.6 mi S of Shuteye Peak. 1911 Comment
  UCD148262  Deschampsia elongata Robert E. Preston 2013-7-17 2925 Madera Brown's Meadow, 1 mi SW of Shuteye Peak. 2083 Comment
  UCD148263  Calochortus minimus Robert E. Preston 2013-7-17 2926 Madera Brown's Meadow, 1 mi SW of Shuteye Peak. 2083 Comment
  UCD148265  Sidalcea reptans Robert E. Preston 2013-7-17 2928 Madera Brown's Meadow, 1 mi SW of Shuteye Peak. 2083 Comment
  UCD148266  Scirpus diffusus Robert E. Preston 2013-7-17 2929 Madera Brown's Meadow, 1 mi SW of Shuteye Peak. 2083 Comment
  UCD148267  Danthonia unispicata Robert E. Preston 2013-7-17 2930 Madera Brown's Meadow, 1 mi SW of Shuteye Peak. 2083 Comment
  UCD148270  Epilobium Robert E. Preston 2013-7-17 2933 Madera Lower Brown's Meadow, ca. 1 mi SW of Shuteye Peak. 2052 Comment
  UCD148271  Veronica scutellata Robert E. Preston 2013-7-17 2934 Madera Lower Brown's Meadow, ca. 1 mi SW of Shuteye Peak. 2052 Comment
  UCD163457  Vaccinium shastense subsp. nevadense Robert E. Preston 2015-9-2 3032 Madera North end of Lower Brown's Meadow, 1.4 mi SW of Shuteye Peak. 2053 Comment
  UCD60776  Echinochloa colona Robert E. Preston 2004-8-26 2281 Madera 6 mi SE of Chowchilla, along Rd 22. 86 Comment
  UCD65696  Eriochloa acuminata Robert E. Preston 2004-8-26 2280 Madera 1.8 mi W of Madera, at jct Rd 23 and Ave 14 1/2. 74 Comment
  UCD77211  Crassula tillaea Robert E. Preston 2005-3-3 2307 Madera 8.3 mi SW of Madera 60 Comment
  UCD77212  Crassula connata Robert E. Preston 2005-4-15 2333 Madera 11.4 mi SW of Madera 56 Comment
  UCD77236  Amsinckia eastwoodiae Robert E. Preston 2005-3-4 2311 Madera 8.3 miles SW of Madera. 61 Comment
  UCD77239  Amsinckia eastwoodiae Robert E. Preston 2005-3-10 2320 Madera 9 miles SW of Madera. 60 Comment
  UCD77245  Amsinckia eastwoodiae Robert E. Preston 2005-4-15 2334 Madera 8.8. mi SW of Madera 61 Comment
  UCD77249  Leptosiphon liniflorus Robert E. Preston 2005-4-14 2331 Madera 11.3 mi SW of Madera 56 Comment
  UCD77283  Plagiobothrys humistratus Robert E. Preston 2005-3-11 2325 Madera 9 mi SW of Madera. 53 Comment
  UCD77284  Plagiobothrys leptocladus Robert E. Preston 2005-4-15 2332 a Madera 9.4 mi SW of Madera. 54 Comment
  UCD77287  Plagiobothrys acanthocarpus Robert E. Preston 2005-3-9 2318 Madera 8.3 mi SW of Madera. 61 Comment
  UCD77291  Plagiobothrys tenellus Robert E. Preston 2005-3-4 2314 Madera 9.6 mi SW of Madera. 59 Comment
  UCD77326  Amaranthus retroflexus Robert E. Preston 2004-8-26 2283 Madera 6 mi SE of Chowchilla, along Rd 22 86 Comment
  UCD77327  Amaranthus blitoides Robert E. Preston 2004-8-26 2282 Madera 6 mi SE of Chowchilla, along Rd 22 86 Comment
  UCD77328  Amaranthus palmeri Robert E. Preston 2004-8-26 2279 Madera 1.8 mi W of Madera, at jct Rd 23 and Ave 14 1/2 74 Comment
  UCD77484  Castilleja brevistyla Robert E. Preston 2005-3-4 2312 Madera 8.3 mi SW of Madera. 61 Comment
  UCD77779  Hordeum depressum Robert E. Preston 2005-3-4 2313 Madera 8.3 mi SW of Madera. 61 Comment
  UCD77797  Lasthenia minor Robert E. Preston 2005-3-10 2324 Madera 9 mi SW of Madera 60 Comment
  UCD77921  Plectritis macrocera Robert E. Preston 2005-3-10 2323 Madera 9 mi SW of Madera 60 Comment
  UCD77923  Poa secunda Robert E. Preston 2005-3-3 2309 Madera 8.3 miles SW of Madera 61 Comment
  UCD77963  Psilocarphus chilensis Robert E. Preston 2005-4-6 2329 Madera 9.4 mi SW of Madera 54 Comment
  UCD77966  Puccinellia simplex Robert E. Preston 2005-3-10 2321 Madera 9 mi SW of Madera 60 Comment
  UCD78011  Spergularia marina Robert E. Preston 2005-4-14 2332 Madera 11 mi SW of Madera 56 Comment
  UCD78044  Trifolium depauperatum var. truncatum Robert E. Preston 2005-3-9 2319 Madera 8 miles SW of Madera. 63 Comment
  UCD78054  Trifolium depauperatum var. depauperatum Robert E. Preston 2005-3-3 2308 Madera 8.3 miles SW of Madera 61 Comment
  UCD78073  Tropidocarpum gracile Robert E. Preston 2005-3-10 2322 Madera 9 miles SW of Madera. 60 Comment
  UCD84695  Trifolium tomentosum Robert E. Preston 2009-4-16 2656 Madera Ca. 5.3 mi SW of Friant, ca. 0.8 mi NNE of the jct Hwy 41 and Ave 12. 118 Comment
  UCD84697  Plagiobothrys undulatus Robert E. Preston 2009-4-16 2657 Madera Ca. 5.3 mi SW of Friant., ca. 0.8 mi NNE of the jct Hwy 41 and Ave 12. 118 Comment
  UCD84725  Verbena bracteata Robert E. Preston 2009-8-6 2714 Madera Madera Ranch, ca. 10 mi WSW of Madera. 60 Comment
  UCD96534  Myosurus minimus Robert E. Preston 2005-3-3 2310 Madera 8.3 mi SW of Madera. 61 Comment
  UCD77370  Atriplex persistens Robert E. Preston 2000-9-22 1443 Madera Madera Ranch, ca. 6.5 mi sw of Madera, T12N R16E nw 1/4 Section 11 60 Comment
  UCD77373  Atriplex argentea var. expansa Robert E. Preston 2000-9-22 1445 Madera Madera Ranch, ca. 6.5 mi sw of Madera, T12N R16E Section 11 62 Comment
  UCD77377  Atriplex cordulata Robert E. Preston 2000-6-5 1365 Madera Madera Ranch, 8 mi sw of Madera, T12N R16E nw 1/4 Section 15 59 Comment
  UCD77399  Atriplex persistens Robert E. Preston 2000-6-6 1371 Madera Madera Ranch, ca. 10 mi sw of Madera, T12N R16E ne 1/4 Section 20 55 Comment
  UCD77400  Atriplex subtilis Robert E. Preston 2000-6-6 1373 Madera Madera Ranch, ca. 10 mi sw of Madera, T12N R16E Section 29 55 Comment
  UCD77401  Atriplex cordulata Robert E. Preston 2000-6-6 1375 Madera Madera Ranch, ca. 10 mi sw of Madera, T12N R16E Section 29 55 Comment
  UCD77411  Atriplex minuscula Robert E. Preston 2000-4-25 1334 Madera Madera Ranch, ca. 7 mi sw of Madera, T12N R16E nw 1/4 Section 15 59 Comment
  UCD77439  Camissonia contorta Robert E. Preston 2000-4-5 1316 Madera Madera Ranch, ca. 10 miles SW of Madera. 54 Comment
  UCD77442  Camissonia campestris Robert E. Preston 2000-4-5 1315 Madera Madera Ranch, ca. 10 miles SW of Madera. 54 Comment
  UCD77487  Castilleja exserta Robert E. Preston 2000-4-6 1318 Madera Madera Ranch, ca. 7 mi sw of Madera. 59 Comment
  UCD77543  Chorizanthe uniaristata Robert E. Preston 2000-6-5 1368 Madera Madera Ranch, 8 mi sw of Madera, T12N R16E ne 1/4 Section 16. 57 Comment
  UCD77554  Clarkia purpurea subsp. purpurea Robert E. Preston 2000-4-25 1335 Madera Madera Ranch, ca. 7 miles SW of Madera. 59 Comment
  UCD77562  Collinsia bartsiifolia Robert E. Preston 2000-4-5 1314 Madera Madera Ranch, ca. 10 miles southwest of Madera. 56 Comment
  UCD77593  Delphinium hansenii subsp. ewanianum Robert E. Preston 2000-4-25 1333 Madera Madera Ranch, ca. 7 mi sw of Madera, T12N R16E nw 1/4 Section 15 59 Comment
  UCD77621  Atriplex covillei Robert E. Preston 2000-6-6 1374 Madera Madera Ranch, ca. 10 mi sw of Madera, T12N R16E Section 29 55 Comment
  UCD77712  Eryngium spinosepalum Robert E. Preston 2000-6-26 1383 Madera 15 mi e of Madera, along Hwy 41, 0.1 mi n of Four Corners. 140 Comment
  UCD77713  Eryngium spinosepalum Robert E. Preston 2000-6-26 1384 Madera 15 mi e of Madera, 1 mi n of Four Corners, along Road 209, 0.3 to 1.3 mi n of its jct with Hwy 41, 152 Comment
  UCD77811  Lepidium acutidens Robert E. Preston 2000-4-7 1328 Madera Madera Ranch, ca. 10 mi sw of Madera. 54 Comment
  UCD77816  Lepidium nitidum Robert E. Preston 2000-4-7 1326 a Madera Madera Ranch, ca. 10 mi sw of Madera. 54 Comment
  UCD77817  Lepidium nitidum Robert E. Preston 2000-4-7 1322 Madera Madera Ranch, ca. 10 mi sw of Madera, T12N R16E se 1/4 Section 28 56 Comment
  UCD77818  Lepidium nitidum Robert E. Preston 2000-3-22 1306 Madera Madera Ranch, ca. 10 mi SW of Madera. 53 Comment
  UCD77857  Microseris douglasii Robert E. Preston 2000-3-23 1310 Madera Madera Ranch, ca. 8 mi SW of Madera. 57 Comment
  UCD78091  Wislizenia refracta subsp. californica Robert E. Preston 2000-9-22 1442 Madera Madera Ranch, ca. 6.5 miles SW of Madera. 62 Comment
  UCD96311  Myosurus minimus Robert E. Preston 2000-4-3 1313 Madera Madera Ranch, ca. 10 mi sw of Madera. 56 Comment
  CHSC35655  Arabis blepharophylla R. E. Preston 1982-4-17 241 Marin At roadside. Along State Hwy 1, ca. 1 mi s of Tomales. 30 Comment
  UCD166880  Dichelostemma capitatum Robert E. Preston 2016-2-27 3036 Marin Novato, Mt. Burdell Open Space, ca. 0.25 mi N of the intersection of San Marin Drive and San Mateo Way. 48 Comment
  UCD58844  Schedonorus pratensis Robert E. Preston 1982-4-17 240 H Marin Along Sir Francis Drake Hwy., ca. 1/4 mi. E of its jct. with Hwy. 1 at Olema. 36 Comment
  UCD77505  Centromadia pungens Robert E. Preston 2002-8-1 1941 Marin Novato, on W side of Pacheco Pond, along levee 0 Comment
  UCD77715  Erysimum franciscanum Robert E. Preston 2000-4-14 1331 Marin Marin Peninsula, ca. 0.4 mi s of entrance to Waldo Tunnel, on roadcut along w side of Highway 1/101, 37.8382? N, 122.4865? W 121 Comment
  UCD78007  Sonchus tenerrimus Robert E. Preston 2002-8-1 1942 Marin Novato, in field on N side of Bel Marin Keys Blvd, at entrance to Bel Marin Keys 0 Comment
  UCD78110  Dittrichia graveolens Robert E. Preston 2002-8-1 1943 Marin Novato, former Hamilton Army Air Field, along Todd Rd 7 Comment
  UCR179377  Dittrichia graveolens Robert E. Preston 2002-8-1 1943 Marin Novato, former Hamilton Army Air Field, along Todd Road 8 Comment
  UCD140175  Carex barbarae Robert E. Preston 1982-4-17 240 D Marin around 1/2 mile north of Jewell on Sir Francis Drake Highway. 30 Comment
  UCD142108  Luzula comosa Robert E. Preston 1982-4-17 240 A Marin around 0.1 mile north of Jewell, on Sir Francis Drake Highway. 30 Comment
  UCD78183  Streptanthus tortuosus Robert E. Preston 2008-5-22 2635 Mariposa 5 mi S of Mariposa, ca. 1.25 mi W of summit of Lookout Mtn 498 Comment
  UCD78184  Streptanthus tortuosus Robert E. Preston 2008-5-22 2635 Mariposa 5 mi S of Mariposa, ca. 1.25 mi W of summit of Lookout Mtn 498 Comment
  UCD78185  Streptanthus tortuosus Robert E. Preston 2008-5-22 2635 Mariposa 5 mi S of Mariposa, ca. 1.25 mi W of summit of Lookout Mtn 498 Comment
  UCD78187  Streptanthus tortuosus Robert E. Preston 2008-5-22 2635 Mariposa 5 mi S of Mariposa, ca. 1.25 mi W of summit of Lookout Mtn 498 Comment
  UCD116283  Streptanthus tortuosus Robert E. Preston 1984-5-5 440 Mariposa 8.8 km SE of Coulterville, E side of Highway 49. 548 Comment
  UCD116309  Streptanthus tortuosus Robert E. Preston 1984-7-16 488 Mariposa Yosemite National Park, Oak Flat Road, 2.2 km west of its junction with Tioga Pass Road. 1650 Comment
  UCD78023  Streptanthus tortuosus Robert E. Preston 2001-7-18 1674 Mariposa Ca. 4.5 mi sw of Wawona, 1 mile w of Battalion Pass, along Chowchilla Mtn Rd, T5S R21E sw 1/4 Section 7 1493 Comment
  UC1606994  Layia septentrionalis Robert E. Preston 1995-5-5 864 Mendocino 4.8 mi se Hopland (on w-facing road cut); USGS Hopland 7.5' quad 350 Comment
  UCD105541  Vicia hirsuta Robert E. Preston 2010-4-26 2777 Mendocino 5.5 mi SE of Boonville, along Hwy 128. 246 Comment
  UCD105542  Lathyrus cicera Robert E. Preston 2010-4-26 2776 Mendocino 5.5 mi SE of Boonville, along Hwy 128. 246 Comment
  UCD105544  Hesperevax sparsiflora var. sparsiflora Robert E. Preston 2010-4-26 2778 Mendocino 5.5 mi SE of Boonville, along Hwy 128. 246 Comment
  UCD133951  Layia septentrionalis Robert E. Preston 1995-5-5 864 Mendocino ca. 4.8 miles southeast of Hopland, on west-facing road cut. 350 Comment
  UCD146988  Triphysaria pusilla Robert E. Preston 2011-4-11 2831 Mendocino Little Lake Valley, 0.4 mi E of Willits Fairgrounds. 409 Comment
  UCD146989  Soliva sessilis Robert E. Preston 2011-4-11 2832 Mendocino Little Lake Valley, 0.4 mi E of Willits Fairgrounds. 409 Comment
  UCD146990  Lamium purpureum Robert E. Preston 2011-4-12 2833 Mendocino Little Lake Valley, 0.55 mi NE of Hearst-Willets Rd crossing of Outlet Creek. 408 Comment
  UCD146993  Glyceria declinata Robert E. Preston 2011-4-13 2836 Mendocino Little Lake Valley, 0.5 mi N of Willits High School, in field E of Hwy 101. 405 Comment
  UCD146994  Ranunculus alismifolius Robert E. Preston 2011-4-14 2837 Mendocino Little Lake Valley, 0.6 mi N of Willits High School. 409 Comment
  UCD146995  Allium triquetrum Robert E. Preston 2011-4-18 2838 Mendocino Little Lake Valley, 0.85 mi N of Willits High School. 405 Comment
  UCD146996  Ranunculus occidentalis Robert E. Preston 2011-4-19 2839 Mendocino Little Lake Valley, 0.55 mi NNE of Willits Sewage Treatment Plant. 406 Comment
  UCD146997  Cardamine hirsuta Robert E. Preston 2011-4-19 2840 Mendocino Little Lake Valley, 0.7 mi NNE of Willits Sewage Treatment Plant. 406 Comment
  UCD146998  Montia fontana Robert E. Preston 2011-4-19 2842 Mendocino Little Lake Valley, 08 mi N of Willits Sewage Treatment Plant. 406 Comment
  UCD146999  Narcissus pseudonarcissus Robert E. Preston 2011-4-19 2843 Mendocino Little Lake Valley, 0.57 mi NNE of Willits Sewage Treatment Plant. 406 Comment
  UCD147001  Carex unilateralis Robert E. Preston 2011-4-20 2846 Mendocino Little Lake Valley, 1.4 mi N of Willits Sewage Treatment Plant. 403 Comment
  UCD147002  Montia linearis Robert E. Preston 2011-4-20 2847 Mendocino Little Lake Valley, 1.4 mi NNE of Willits Sewage Treatment Plant. 403 Comment
  UCD147003  Eryngium armatum Robert E. Preston 2011-4-20 2848 Mendocino Little Lake Valley, 1.4 mi NNE of Willits Sewage Treatment Plant. 403 Comment
  UCD147016  Trifolium striatum Robert E. Preston 2011-5-11 2861 Mendocino Little Lake Valley, 2.1 mi NNE of Willits. 406 Comment
  UCD163113  Cryptantha dissita Robert E. Preston 2010-6-17 2814 Mendocino 2 mi W of Hopland. 169 Comment
  UCD166872  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2016-3-26 3044 Mendocino 0.8 mi W of Hopland, along Feliz Creek Rd. 174 Comment
  UCD78070  Triteleia laxa Robert E. Preston 2004-7-14 2272 Mendocino Cabrillo Lighthouse State Park. 13 Comment
  UCD84727  Senecio jacobaea Robert E. Preston 2009-8-10 2716 Mendocino SW end of Little Lake Valley, ca. 2.6 mi ESE of Willits, in intermittent tributary of Davis Creek. 427 Comment
  UCD84729  Eryngium aristulatum Robert E. Preston 2009-8-12 2718 Mendocino Little Lake Valley, ca. 1 mi NE of Willits. 409 Comment
  UCD134222  Tolpis barbata Robert E. Preston 1995-5-5 866 Mendocino 7 miles southeast of Hopland. Comment
  CAS-BOT-BC323061  Trichocoronis wrightii Robert E. Preston 1997-5-21 1031 Merced Merced National Wildlife Refuge, s of Mariposa Bypass 30 Comment
  JEPS106442  Juncus ambiguus Robert E. Preston 2003-3-26 2041 Merced Ca. 10 mi SW of Los Banos, along Salt Creek. 152 Comment
  JEPS106443  Erodium macrophyllum Robert E. Preston 2003-3-25 2041 Merced Ca. 11 mi SSW of Los Banos, in hills ca. 0.5 mi W of Ortigalita Creek. 228 Comment
  JEPS106446  Castilleja Robert E. Preston 2003-4-16 2110 Merced Atwater, along eastern edge of former Castle AFB, in USP-Atwater vernal pool preserve. 54 Comment
  UCD104898  Clarkia purpurea subsp. purpurea Robert E. Preston 1998-5-29 1154 Merced Castle Air Force Base, in fields E of bunkers along E side of runways. 56 Comment
  UCD105267  Scutellaria tuberosa Robert E. Preston 2010-4-7 2742 Merced Diablo Range, 1.6 mi NE of Pacheco Pass. 213 Comment
  UCD105270  Plagiobothrys trachycarpus Robert E. Preston 2010-4-8 2744 Merced Diablo Range, 0.6 mi NE of Pacheco Pass. 437 Comment
  UCD105275  Pentachaeta exilis subsp. exilis Robert E. Preston 2010-4-7 2741 Merced Diablo Range, 2 mi NE of Pacheco Pass. 213 Comment
  UCD105523  Eryngium spinosepalum Robert E. Preston 2010-4-7 2740 Merced Diablo Range, 2.4 mi NE of Pacheco Pass, along western shoreline of San Luis Reservoir. 166 Comment
  UCD147047  Centromadia parryi subsp. rudis Robert E. Preston 2012-8-26 2890 Merced 11 mi SW of Merced, NW of the jct of Sandy Mush Rd and Dan McNamara Rd. 30 Comment
  UCD166865  Dichelostemma capitatum Robert E. Preston 2016-4-2 3050 Merced 4.6 mi N of Merced, along La Paloma Rd, 0.25 mi E of its intersection with Snelling Rd. 72 Comment
  UCD77118  Marah fabacea Robert E. Preston 2003-3-24 2039 Merced Ca. 11 mi SSW of Los Banos, in hills ca. 1 mi W of Ortigalita Creek 265 Comment
  UCD77120  Thysanocarpus curvipes var. curvipes Robert E. Preston 2003-4-10 2107 Merced Ca. 9.2 miles WSW of Los Banos, 3.1 miles N of Los Banos Creek. 185 Comment
  UCD77122  Brodiaea appendiculata Robert E. Preston 2003-4-7 2098 Merced NE of Merced, ca. 2.6 mi ENE of Yosemite Lake. 103 Comment
  UCD77123  Brodiaea terrestris subsp. terrestris Robert E. Preston 2003-4-9 2104 Merced Ca. 2.1 mi NW of Little Panoche Reservoir, on divide between Salt Canyon and Wildcat Canyon 295 Comment
  UCD77213  Crassula connata Robert E. Preston 2003-3-24 2016 Merced Ca. 12 mi SSW of Los Banos, ca. 0.05 mi W of Ortigalita Creek. 236 Comment
  UCD77230  Claytonia perfoliata Robert E. Preston 2003-3-25 2034 Merced ca. 11 mi SSW of Los Banos, in hills ca. 1 mi W of Ortigalita Creek. 227 Comment
  UCD77242  Amsinckia tessellata var. tessellata Robert E. Preston 2003-3-24 2038 Merced Ca. 11 mi SSW of Los Banos, in hills ca. 1 mi W of Ortigalita Creek. 265 Comment
  UCD77244  Amsinckia lycopsoides Robert E. Preston 2003-3-5 1979 Merced 11.4 mi SSW of Los Banos, 1 mi W of Ortigalita Creek. 262 Comment
  UCD77265  Dichelostemma capitatum Robert E. Preston 2003-3-5 1974 Merced 10.4 mi SSW of Los Banos. 190 Comment
  UCD77269  Juncus ambiguus Robert E. Preston 2003-3-25 2047 Merced Ca. 11 mi SSW of Los Banos, along Arburua Rd, ca. 2 mi W of Ortigalita Creek 205 Comment
  UCD77278  Plantago erecta Robert E. Preston 2003-3-5 1976 Merced 11 mi SSW of Los Banos, 1.9 mi W of Ortigalita Creek. 205 Comment
  UCD77279  Plantago elongata Robert E. Preston 2003-3-5 1982 Merced 11.2 mi SSW of Los Banos, 0.1 mi E of Ortigalita Creek 192 Comment
  UCD77292  Plagiobothrys acanthocarpus Robert E. Preston 2003-3-5 1981 Merced 11.2 mi SSW of Los Banos, 0.1 mi E of Ortigalita Creek. 192 Comment
  UCD77312  Allium crispum Robert E. Preston 2003-3-26 2048 Merced Ca. 10 mi SW of Los Banos, along Salt Creek 152 Comment
  UCD77314  Allium serra Robert E. Preston 2003-3-25 2043 Merced Ca. 12.5 mi SSW of Los Banos, in hills ca. 0.6 mi E of Ortigalita Creek 309 Comment
  UCD77365  Astragalus gambelianus Robert E. Preston 2003-4-9 2105 Merced 9.6 mi WSW of Los Banos, ca. 0.2 mi W of Jasper Sears Rd. 160 Comment
  UCD77366  Astragalus didymocarpus Robert E. Preston 2003-3-24 2012 Merced Ca. 12 mi SSW of Los Banos, ca. 0.1 mi W of Ortigalita Creek. 202 Comment
  UCD77367  Athysanus pusillus Robert E. Preston 2003-3-24 2022 Merced Ca. 12 mi SSW of Los Banos, ca. 0.3 mi W of Ortigalita Creek. 243 Comment
  UCD77369  Atriplex fruticulosa Robert E. Preston 2003-3-25 2040 Merced Ca. 11 mi SSW of Los Banos, in hills ca. 0.9 mi W of Ortigalita Creek 283 Comment
  UCD77381  Atriplex persistens Robert E. Preston 1997-6-18 1039 Merced nw of the corner of Dan McNamara Rd and Green House Rd 28 Comment
  UCD77437  Eremothera boothii subsp. decorticans Robert E. Preston 2003-3-25 2031 Merced Ca. 11 miles SSW of Los Banos, in hills ca. 1 mile W of Ortigalita Creek 276 Comment
  UCD77451  Capsella bursa-pastoris Robert E. Preston 2003-3-5 1985 Merced 12.2 mi SSW of Los Banos, 0.6 mi E of Ortigalita Creek. 249 Comment
  UCD77482  Castilleja campestris subsp. succulenta Robert E. Preston 1997-4-19 1027 Merced Castle Air Force Base. 53 Comment
  UCD77485  Castilleja exserta Robert E. Preston 2003-3-24 2014 Merced Ca. 12 mi SSW of Los Banos, ca. 0.2 mi W of Ortigalita Creek. 218 Comment
  UCD77490  Castilleja attenuata Robert E. Preston 2003-3-26 2054 Merced Ca. 10 mi SW of Los Banos, along Salt Creek 152 Comment
  UCD77553  Clarkia purpurea subsp. purpurea Robert E. Preston 1998-5-29 1154 Merced Castle Air Force Base, in fields E of bunkers along E side of runways. 56 Comment
  UCD77557  Clarkia affinis Robert E. Preston 2003-4-9 2103 Merced 5 miles NNE of Ortigalita Peak, 1.5 mies E of Ortigalita Creek 330 Comment
  UCD77563  Collinsia sparsiflora var. collina Robert E. Preston 2003-3-6 1987 Merced 12 miles south-southwest of Los Banos, west of Ortigalita Creek. 208 Comment
  UCD77569  Cotula australis Robert E. Preston 2003-2-25 1970 Merced Santa Nella. 45 Comment
  UCD77592  Delphinium recurvatum Robert E. Preston 2003-3-26 2053 Merced Ca. 10 mi SW of Los Banos, along Salt Creek. 152 Comment
  UCD77636  Eremalche parryi Robert E. Preston 2003-3-24 2021 Merced Ca. 12 mi SSW of Los Banos, ca. 0.3 mi W of Ortigalita Creek. 238 Comment
  UCD77678  Eriogonum gracillimum Robert E. Preston 2003-3-24 2027 a Merced 11.6 mi SW of Los Banos, ca. 0.5 mi W of Ortigalita Creek. 264 Comment
  UCD77716  Erysimum capitatum Robert E. Preston 2003-3-25 2036 Merced Ca. 11 mi SSW of Los Banos, in hills ca. 1 mi W of Ortigalita Creek 265 Comment
  UCD77740  Gilia tricolor Robert E. Preston 2003-3-5 1975 Merced 9.5 mi SSW of Los Banos, 0.3 mi W of Ortigalita Creek 175 Comment
  UCD77742  Gilia austrooccidentalis Robert E. Preston 2003-3-24 2019 Merced Ca. 12 mi SSW of Los Banos, ca. 0.05 mi W of Ortigalita Creek. 236 Comment
  UCD77749  Hedypnois cretica Robert E. Preston 2003-4-8 2099 Merced NE of Merced, ca. 2.8 mi ENE of Yosemite Lake. 121 Comment
  UCD77759  Herniaria hirsuta var. cinerea Robert E. Preston 2003-3-25 2032 Merced Ca. 11 mi SSW of Los Banos, in hills ca. 1 mi W of Ortigalita Creek 276 Comment
  UCD77760  Hesperevax caulescens Robert E. Preston 2003-4-7 2095 Merced NE of Merced, ca. 3.4 mi ENE of Yosemite Lake. 73 Comment
  UCD77783  Hornungia procumbens Robert E. Preston 2003-2-24 1969 Merced Ca. 2.6 mi S of Los Banos Reservoir, along Salt Creek. 154 Comment
  UCD77795  Lastarriaea coriacea Robert E. Preston 2003-4-10 2106 Merced Ca. 9.2 mi WSW of Los Banos, 2.5 mi N of Los Banos Creek 178 Comment
  UCD77804  Lepidium acutidens Robert E. Preston 2003-3-5 1984 Merced 12.2 mi SSW of Los Banos, 0.6 mi E of Ortigalita Creek. 249 Comment
  UCD77812  Lepidium nitidum Robert E. Preston 2003-3-5 1971 Merced 9.9 mi SSW of Los Banos, ca. 0.75 mi W of Ortigalita Creek. 164 Comment
  UCD77814  Lepidium nitidum Robert E. Preston 2003-2-24 1967 Merced Ca. 2.6 mi S of Los Banos Reservoir, along Salt Creek 154 Comment
  UCD77830  Lithophragma parviflorum Robert E. Preston 2003-3-26 2055 Merced Ca. 9.5 mi SW of Los Banos, ca. 0.5 mi S of Los Banos Reservoir. 225 Comment
  UCD77842  Lupinus succulentus Robert E. Preston 2003-3-5 1973 Merced 10.4 mi SSW of Los Banos. 190 Comment
  UCD77850  Malacothrix coulteri Robert E. Preston 2003-3-5 1978 Merced 11.4 mi SSW of Los Banos, 1 mi W of Ortigalita Creek. 259 Comment
  UCD77851  Matricaria discoidea Robert E. Preston 2003-3-25 2045 Merced 9 mi SSW of Los Banos, at jct Arburua Rd and Langdon Rd 173 Comment
  UCD77866  Microseris campestris Robert E. Preston 2003-4-8 2100 Merced NE of Merced, ca. 3.5 mi ENE of Yosemite Lake. 114 Comment
  UCD77867  Microsteris gracilis Robert E. Preston 2003-3-24 2024 Merced Ca. 12 miles SSW of Los Banos, ca. 0.3 mile W of Ortigalita Creek. 243 Comment
  UCD77879  Muilla maritima Robert E. Preston 2003-2-24 1966 Merced Ca. 1.8 mi S of Los Banos Reservoir. 182 Comment
  UCD77892  Orobanche uniflora Robert E. Preston 2003-4-7 2097 Merced NE of Merced, ca. 3.8 mi ENE of Yosemite Lake. 99 Comment
  UCD77920  Plectritis ciliosa Robert E. Preston 2003-3-6 1988 Merced 12 mi SSW of Los Banos, W of Ortigalita Creek. 208 Comment
  UCD77965  Pterostegia drymarioides Robert E. Preston 2003-3-24 2017 Merced Ca. 12 mi SSW of Los Banos, ca. 0.05 mi W of Ortigalita Creek. 236 Comment
  UCD77968  Puccinellia simplex Robert E. Preston 2003-3-26 2052 Merced Ca. 10 mi SW of Los Banos, along Salt Creek 152 Comment
  UCD77984  Salix laevigata Robert E. Preston 2003-3-6 1986 Merced 12 mi SSW of Los Banos, along Ortigalita Creek. 202 Comment
  UCD77996  Senecio aphanactis Robert E. Preston 2003-3-24 2015 Merced 12 mi SSW of Los Banos, ca. 0.05 mi W of Ortigalita Creek. 236 Comment
  UCD78012  Spergularia marina Robert E. Preston 2003-3-24 2042 Merced Ca. 11 mi SSW of Los Banos, in hills ca. 0.5 mi W of Ortigalita Creek 186 Comment
  UCD78013  Spergularia marina Robert E. Preston 2003-3-24 2011 Merced Ca. 12 mi SSW of Los Banos, ca. 0.1 mi W of Ortigalita Creek. 202 Comment
  UCD78017  Stellaria pallida Robert E. Preston 2003-3-24 2018 a Merced Ca. 12 mi SSW of Los Banos, ca. 0.05 mi W of Ortigalita Creek. 236 Comment
  UCD78019  Stellaria nitens Robert E. Preston 2003-3-24 2023 Merced Ca. 12 mi SSW of Los Banos, ca. 0.3 mi W of Ortigalita Creek. 243 Comment
  UCD78040  Trichocoronis wrightii Robert E. Preston 1997-5-21 1031 Merced Merced National Wildlife Refuge, s of Mariposa Bypass 30 Comment
  UCD78055  Trifolium depauperatum var. depauperatum Robert E. Preston 2003-3-26 2049 Merced Ca. 10 miles SW of Los Banos, along Salt Creek. 152 Comment
  UCD78061  Trifolium willdenovii Robert E. Preston 2003-3-5 1980 Merced 11.4 mi SSW of Los Banos, 1 mi W of Ortigalita Creek. 262 Comment
  UCD78063  Trifolium depauperatum var. truncatum Robert E. Preston 2003-3-5 1977 Merced 11 miles SSW of Los Banos, 1.9 miles W of Ortigalita Creek. 205 Comment
  UCD78069  Triteleia laxa Robert E. Preston 2003-3-24 2028 Merced Ca. 12 mi SSW of Los Banos, ca. 0.6 mi W of Ortigalita Creek. 209 Comment
  UCD78074  Uropappus lindleyi Robert E. Preston 2003-3-24 2020 Merced Merced: Ca. 12 mi SSW of Los Banos, ca. 0.05 mi W of Ortigalita Creek. 236 Comment
  UCD78133  Caulanthus lasiophyllus Robert E. Preston 2003-3-25 2030 Merced Ca. 11 miles SSW of Los Banos, in hills ca. 1 mile W of Ortigalita Creek 283 Comment
  UCD84693  Navarretia leucocephala subsp. leucocephala Robert E. Preston 2009-4-13 2654 Merced 5.1 mi NE of Planada, in field on S side of Hwy 140. 92 Comment
  UCD84699  Tiquilia hispidissima Robert E. Preston 2009-4-28 2666 b Merced Ca. 8.6 mi SSW of Overton, along Hwy 167, ca, 1.3 mi S of Hwy 12. 446 Comment
  UCD84730  Centromadia parryi subsp. rudis Robert E. Preston 2009-9-30 2719 Merced San Joaquin River floodplain, ca. 1 mi NW of confluence with Mariposa Slough. 24 Comment
  UCD93857  Vulpia microstachys var. ciliata Robert E. Preston 2003-3-24 2026 Merced 12 miles SSW of Los Banos, 0.3 mile W of Ortigalita Creek. 243 Comment
  UCD94579  Vulpia microstachys var. pauciflora Robert E. Preston 2003-3-26 2050 Merced 10 miles SW of Los Banos, along Salt Creek. 152 Comment
  UCD97070  Amaranthus arenicola Robert E. Preston 2004-8-26 2285 Merced 0.7 mi S of Planada, along Plainsburg Rd. 68 Comment
  UCD97072  Amaranthus arenicola Robert E. Preston 2004-8-26 2285 Merced 0.7 mi S of Planada, along Plainsburg Rd. 68 Comment
  UCD77238  Amsinckia eastwoodiae Robert E. Preston 2000-3-16 1304 Merced Ca. 5 miles NE of Chowchilla, along Santa Fe Blvd, 0.7 mile N of Chowchilla River. 88 Comment
  UCD77692  Eryngium castrense Robert E. Preston 2000-6-26 1382 Merced Atwater, US Penitentiary-Atwater vernal pool mitigation site, T6N R13E sw 1/4 Section 28 53 Comment
  UCD77705  Eryngium spinosepalum Robert E. Preston 2000-6-27 1386 Merced 5 mi ne of Chowchilla, along Santa Fe Drive, 0.5 mi n of Madera/Merced County line. 88 Comment
  UCD77706  Eryngium spinosepalum Robert E. Preston 2001-7-18 1675 Merced 6 mi ne of Planada, ca. 0.7 mi w of the Merced/Mariposa County line, along Hwy 140. 99 Comment
  UCD96020  Papaver heterophyllum Robert E. Preston 2003-3-25 2037 Merced 11 miles SSW of Los Banos, in hills 1 mile west of Ortigalita Creek. Comment
  CHSC81395  Polygonum polygaloides subsp. esotericum R. E. Preston 2000-7-18 1400 Modoc Ca. 12 mi nw of Canby, n side of Hwy 139, 1.7 mi e of Forest Service Rd 33N11. 1490 Comment
  CHSC81396  Polygonum polygaloides subsp. esotericum R. E. Preston 2000-7-18 1407 Modoc Ca. 13 mi nw of Canby, along n side of Hwy 139, ca. 300 ft e of Forest Service Rd 44N11. 1481 Comment
  CHSC81397  Polygonum polygaloides subsp. confertiflorum R. E. Preston 2000-7-17 1391 Modoc Ca. 11 mi nw of Canby, on n side of Hwy 139, 2.7 mi e of Forest Service Rd 44N11. 1490 Comment
  JEPS98241  Polygonum polygaloides subsp. confertiflorum R. E. Preston 2000-7-18 1412 Modoc 14 mi NW of Canby (on N side of Hwy 139; ca 0.9 mi e of FSR 44N11) 1466 Comment
  JEPS98242  Polygonum polygaloides subsp. confertiflorum R. E. Preston 2000-7-18 1403 Modoc 12 mi NW of Canby (along Hwy 139) 1490 Comment
Read comments Sep 13 2017
  JEPS98244  Polygonum polygaloides subsp. esotericum R. E. Preston 2000-7-18 1416 Modoc Hog Lake 1499 Comment
  JEPS98245  Polygonum polygaloides subsp. confertiflorum R. E. Preston 2000-7-17 1393 Modoc 9.5 mi NW of Canby (N side of Hwy 139, 3.2 mi e of FSR 44N11; 300 ft E of seasonal lake outfall) 1487 Comment
  JEPS98247  Polygonum polygaloides subsp. esotericum R. E. Preston 2000-7-19 1420 Modoc 8 mi NW of Canby (on N side of Hwy 139; ca 0.9 mi w of FSR 46N10) 1508 Comment
  UCD123042  Castilleja pilosa R. E. Preston 2000-6-2 1362 Modoc Modoc Plateau, along Hwy 139, ca. 2.5 mi e of Forest Service Road 44N11. 1493 Comment
  UCD77254  Calochortus longebarbatus Robert E. Preston 2000-7-18 1396 Modoc Ca. 11 mi nw of Canby, along Hwy 139, 2.65 mi e of Forest Service Rd 44N11. 1490 Comment
  UCD77260  Mimulus pygmaeus Robert E. Preston 2000-5-31 1353 Modoc Modoc Plateau, along Hwy 139, ca. 1 mi w of Forest Service Road 44N11. 1463 Comment
  UCD77337  Antennaria flagellaris Robert E. Preston 2000-6-1 1358 Modoc Modoc Plateau, along Hwy 139, ca. 2 mi e of Forest Service Road 44N11. 1487 Comment
  UCD77623  Epilobium pallidum Robert E. Preston 2000-7-18 1399 Modoc Ca. 12 miles NW of Canby, along Highway 139, 1.6 miles E of Forest Service Road 44N11. 1490 Comment
  UCD77673  Eriogonum nudum var. pubiflorum Robert E. Preston 2000-7-17 1395 Modoc Ca. 11 mi nw of Canby, along Hwy 139, T42N R8E Section 3 1490 Comment
  UCD77711  Eryngium alismifolium Robert E. Preston 2000-7-18 1415 Modoc Hog Lake. 1499 Comment
  UCD77745  Gratiola heterosepala Robert E. Preston 2000-7-18 1418 Modoc Ca. 11 mi nw of Canby, 1,000 ft n of Hwy 139, T42N R8E se 1/4 of ne 1/4 Section 3 1487 Comment
  UCD77747  Hackelia cusickii Robert E. Preston 2000-6-2 1361 Modoc Modoc Plateau, along Hwy 139, ca. 2.5 mi e of Forest Service Road 44N11. 1493 Comment
  UCD77935  Polygonum polygaloides subsp. esotericum Robert E. Preston 2000-7-18 1414 Modoc Ca. 15 mi nw of Canby, along Hwy 139, 0.1 mi e of Forest Service Rd 43N03. 1447 Comment
  UCD77936  Polygonum polygaloides subsp. confertiflorum Robert E. Preston 2000-7-19 1422 Modoc Ca. 9 mi nw of Canby, on n side of Hwy 139, 2.0 mi w of Forest Service Rd 46N10. 1488 Comment
  UCD77940  Polygonum polygaloides subsp. esotericum Robert E. Preston 2000-7-18 1419 Modoc Ca. 8 mi nw of Canby, on n side of Hwy 139, 0.75 mi w of Forest Service Rd 46N10. 1511 Comment
  UCD77941  Polygonum polygaloides subsp. esotericum Robert E. Preston 2000-7-17 1394 Modoc Ca. 9.5 mi nw of Canby, on s side of Hwy 139. 1487 Comment
  UCD77942  Polygonum polygaloides subsp. esotericum Robert E. Preston 2000-7-18 1397 Modoc Ca. 12 mi nw of Canby, along Hwy 139, 1.6 mi e of Forest Service Rd 44N11. 1490 Comment
  UCD77944  Polygonum polygaloides subsp. esotericum Robert E. Preston 2000-7-18 1417 Modoc Ca. 11 mi nw of Canby, 1,000 ft n of Hwy 139. 1487 Comment
  UCD77952  Polygonum polygaloides subsp. confertiflorum Robert E. Preston 2000-6-1 1357 Modoc Modoc Plateau, along Hwy 139, ca. 2 mi e of Forest Service Road, 44N11. 1487 Comment
  UCD77954  Polygonum polygaloides subsp. confertiflorum Robert E. Preston 2000-7-18 1398 Modoc Ca. 12 mi nw of Canby, along Hwy 139, 1.6 mi e of Forest Service Rd 44N11. 1490 Comment
  UCD78042  Trichostema oblongum Robert E. Preston 2000-7-18 1402 Modoc 12 mi nw of Canby, n of Hwy 139, 1.7 mi e of Forest Service Rd 44N11, 1490 Comment
  UCD78075  Utricularia macrorhiza R. E. Preston 2000-7-18 1401 Modoc Ca. 12 mi nw of Canby, n of Hwy 139, 1.7 mi e of Forest Service Rd 44N11. 1490 Comment
  UCD88279  Orcuttia tenuis R. Preston 2000-7-17 1392 Modoc ca. 9.5 miles NW of Canby, on N side of Highway 139, 3.2 miles E of Forest Service Road 44N11. 300 feet E of outfall of large seasonal lake. 1487 Comment
  UCD106913  Epilobium R. E. Preston 2000-5-31 1354 Modoc Modoc Plateau, along Highway 139, ca. 1/2 mile W of Forest Service Road 44N11. Comment
  UCD77305  Agoseris monticola Robert E. Preston 2000-6-2 1363 Modoc Modoc Plateau, along Hwy 139, ca. 2.5 mi e of Forest Service Road 44N11, T42N R8E Section 3 1493 Comment
  UCD77320  Alyssum simplex Robert E. Preston 2000-6-1 1356 Modoc Modoc Plateau, along Hwy 139, ca. 2 mi e of Forest Service Road 44N11, T42N R8E nw 1/4 Section 3 1493 Comment
  UCD77694  Eryngium articulatum Robert E. Preston 2000-7-18 1410 Modoc Ca. 14 mi nw of Canby, on n side of Hwy 139, 0.4 mi w of Forest Service Rd 44N11, T43N R8E ne 1/4 of se 1/4 Section 31 1467 Comment
  UCD77937  Polygonum polygaloides subsp. confertiflorum Robert E. Preston 2000-7-18 1411 Modoc Ca. 14 mi nw of Canby, on n side of Hwy 139, 0.5 mi w of Forest Service Rd 44N11. 1467 Comment
  UCD77950  Polygonum polygaloides subsp. kelloggii Robert E. Preston 2000-6-1 1359 Modoc Modoc Plateau, along Hwy 139, ca. 3 mi e of Forest Service Road 44N11. 1490 Comment
  UCD77953  Polygonum polygaloides subsp. confertiflorum Robert E. Preston 2000-7-18 1413 Modoc Ca. 15 mi nw of Canby, on n side of Hwy 139, 1.25 mi w of Forest Service Rd 44N11. 1467 Comment
  UCD114417  Boechera pendulocarpa Robert E. Preston 1984-7-20 490 Mono on the summit of a small peak on n side of Tioga Lake. 3023 Comment
  UCD116310  Streptanthus tortuosus Robert E. Preston 1984-7-19 489 Mono west of Tioga Lake. 2690 Comment
  CAS-BOT-BC272776  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-15 1194 Monterey Ca. 2.6 mi SE of Chualar, in field on W side of Old Stage Rd, 0.5 mi S of Iverson Rd. 45 Comment
  CAS-BOT-BC272777  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-16 1197 Monterey Laguna Seca Recreation Area 118 Comment
  CAS-BOT-BC272778  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-15 1190 Monterey In field along W side of Natividad Rd, at intersection with Old Stage Rd. 57 Comment
  JEPS95218  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-15 1195 Monterey ca. 6.4 mi E of Salinas, in field along E side of Old Stage Road 36 Comment
  JEPS95219  Centromadia parryi subsp. congdonii R. E. Preston 1998-10-16 1196 Monterey Between Salinas and Monterey, along Hwy 68, ca. 0.5 mi W of Corral de Tierra Rd. 100 Comment
  JEPS95224  Arctostaphylos tomentosa Robert E. Preston 1997-7-29 1046 Monterey Fort Ord, ca. 100 ft N of South Boundary Road, ca. 0.13 mi N of York School 115 Comment
  UCD105205  Centromadia parryi subsp. congdonii Robert E. Preston 2010-7-29 2816 Monterey Moss Landing, at power plant, in former tank farm area. 6 Comment
  UCD130140  Centromadia parryi subsp. congdonii Robert E. Preston 1998-10-15 1191 Monterey 0.5 mile south of the intersection of Old Stage Road and Old Natividad Road. 36 Comment
  UCD130141  Centromadia parryi subsp. congdonii Robert E. Preston 1998-10-15 1192 Monterey Salinas, along Work St., north of its intersection with E. Blanco Road. 12 Comment
  UCD130142  Centromadia parryi subsp. congdonii Robert E. Preston 1998-10-15 1193 Monterey Chualar. 30 Comment
  UCD147043  Pittosporum undulatum Robert E. Preston 2012-8-14 2886 Monterey Presidio of Monterey, Huckleberry Hill Preserve. 164 Comment
  UCD147044  Ilex aquifolium Robert E. Preston 2012-8-14 2887 Monterey Presidio of Monterey, Huckleberry Hill Preserve. 164 Comment
  UCD147045  Cotoneaster pannosus Robert E. Preston 2012-8-15 2888 Monterey Presidio of Monterey, on hill N of the Post Exchange. 160 Comment
  UCD147046  Crocosmia X crocosmiiflora Robert E. Preston 2012-8-15 2889 Monterey Presidio of Monterey, in drainage along Artillery St, at jct with Lighthouse Dr. 11 Comment
  UCD77452  Cardamine hirsuta Robert E. Preston 2003-2-19 1964 Monterey Moss Landing State Wildlife Area, N side of Elkhorn Slough, adjacent to Hwy 1 2 Comment
  UCD77782  Hornungia procumbens Robert E. Preston 2003-2-19 1962 Monterey Moss Landing State Wildlife Area, N side of Elkhorn Slough, adjacent to Hwy 1. 2 Comment
  UCD77798  Lasthenia glabrata subsp. glabrata Robert E. Preston 2003-2-19 1963 Monterey Moss Landing State Wildlife Area, N side of Elkhorn Slough, adjacent to Hwy 1. 2 Comment
  UCD77808  Lepidium oxycarpum Robert E. Preston 2003-2-19 1960 Monterey Moss Landing State Wildlife Area, N side of Elkhorn Slough, adjacent to Hwy 1 2 Comment
  UCD77833  Acmispon strigosus Robert E. Preston 1997-4-10 1025 Monterey Camp Roberts. 182 Comment
  UCD78197  Parietaria judaica Robert E. Preston 2008-9-23 2645 Monterey Presidio of Monterey, near jct Artillery St. and Corporal Ewing Road. 12 Comment
  UCD99849  Chorizanthe pungens Robert E. Preston 1994-3-30 637 Monterey Moss Landing, top of Cemetery Hill. 18 Comment
  UCD104678  Astragalus clevelandii Robert E. Preston 1987-6-18 566 Napa 1.4 mile ne of Big Basin. 414 Comment
  UCD116013  Streptanthus glandulosus subsp. glandulosus Robert E. Preston 1988-4-10 578 Napa 0.4 mile SW of the confluence of Putah and Hunting Creeks. 268 Comment
  UCD116024  Streptanthus hesperidis Robert E. Preston 1987-5-9 556 Napa north side of Morgan Valley Road, 2.7 miles north of its junction with Pope Valley Road. [Correction from Rob Preston, 2014, north side of Knoxville-Berryessa Road, 2.7 miles north of its junction with Pope Valley Road.] 182 Comment
  UCD127712  Lomatium repostum Robert E. Preston 1987-6-13 559 Napa Snell Peak. 365 Comment
  UCD133720  Juniperus californica Robert E. Preston 1987-6-16 563 A Napa CA: Napa Co.: On and near the margins of a dry streambed, ca. 1.5 mi SE of Big Basin. 243 Comment
  UCD134745  Packera clevelandii Robert E. Preston 1987-6-18 565 Napa 1.4 mile northeast of Big Basin. 414 Comment
  UCD138528  Allium fimbriatum Robert E. Preston 1988-4-10 577 Napa 0.4 mile SW of the confluence of Putah and Hunting Creeks. 268 Comment
  UCD148243  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-4-6 2904 Napa Along Hwy 128, 0.4 mi W of its jct with Berryessa-Knoxville Rd. 213 Comment
  UCD148244  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-4-6 2905 Napa Calistoga, on N side of old landing strip, at east end. 104 Comment
  UCD148245  Deschampsia danthonioides Robert E. Preston 2013-4-6 2906 Napa Calistoga, on N side of old landing strip, at east end. 104 Comment
  UCD148246  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-4-6 2907 Napa Lake Hennessey, at the public fishing access on Conn Valley Rd. 99 Comment
  UCD48439  Navarretia jepsonii Robert E. Preston 1988-4-10 583 Napa Napa Co.; W-facing serpentine slope and serpentine flat, ca. 2100 ft ESE of the confluence of Putah and Hunting Creeks; (Jercicho Valley 7.5' quad). 274 Comment
  UCD77273  Plantago elongata Robert E. Preston 2005-3-10 2315 Napa Mouth of Long Canyon 312 Comment
  UCD77928  Pogogyne douglasii Robert E. Preston 2002-6-17 1821 Napa Pope Valley, along Pope Canyon Rd, 0.5 mi N of its jct with Pope Valley Cross Rd. 187 Comment
  UCD78056  Trifolium fragiferum Robert E. Preston 2005-8-17 2367 Napa Ca. 1 mile NW of Napa Junction. 14 Comment
  UCD78099  Triphysaria pusilla Robert E. Preston 2005-3-10 2316 Napa Mouth of Long Canyon 312 Comment
  UCD101529  Eriogonum vimineum Robert E. Preston 1987-6-20 568 Napa 3/4 mile N of Round Corral in Big Basin. 268 Comment
  UCD104516  Acmispon wrangelianus Robert E. Preston 1988-4-10 584 Napa 0.3 mi SE of the confluence of Putah and Hunting Creeks, on w-facing slope. 243 Comment
  UCD110495  Hesperolinon californicum Robert E. Preston 1987-6-21 571 Napa ca. 1 1/4 mi se of Devil's Head Peak. 274 Comment
  UCD110503  Hesperolinon clevelandii Robert E. Preston 1988-4-10 588 Napa ca. 0.9 mi ESE of confluence of Jericho and Hunting Creeks. 365 Comment
  UCD115954  Streptanthus breweri Robert E. Preston 1987-6-20 567 Napa 0.75 mile north of Round Corral in Big Basin. 268 Comment
  UCD116626  Sidalcea keckii Robert E. Preston 1988-4-10 582 Napa 0.3 mile SE of confluence of Putah and Hunting Creeks. 243 Comment
  UCD119813  Cryptantha hispidula Robert E. Preston 1988-4-10 574 Napa 0.4 mile southwest of the confluence of Putah Creek and Hunting Creek, on a southeast-facing serpentine slope. 268 Comment
  UCD126390  Nemacladus montanus Robert E. Preston 1987-6-20 569 Napa 3/4 mile north of Round Corral in Big Basin. 268 Comment
  UCD127626  Lomatium dasycarpum Robert E. Preston 1987-6-18 564 Napa around 1/2 mile east of Round Corral, Big Basin. 182 Comment
  UCD127876  Perideridia oregana Robert E. Preston 1987-6-16 563 B Napa ca. 1.5 miles southeast of of Big Chain. 182 Comment
  UCD130360  Chaenactis glabriuscula var. heterocarpha Robert E. Preston 1988-4-10 575 Napa 0.4 mile southwest of the confluence of Putah Creek and Hunting Creek, 268 Comment
  UCD134092  Lessingia nemaclada Robert E. Preston 1987-6-13 562 Napa ca. 1 mi sw of Big Basin. 292 Comment
  UCD138524  Allium falcifolium Robert E. Preston 1988-4-10 587 Napa ca. 0.6 mi ESE of Confluence of Putah and Hunting Creeks. 335 Comment
  UCD48408  Navarretia mellita Robert E. Preston 1987-6-13 560 Napa CA: Napa Co.; N slope of Snell Peak. T10N R5W se1/4 S7 (Aetna Springs 7.5' quad). 365 Comment
  UCD48629  Navarretia pubescens Robert E. Preston 1987-6-13 561 Napa CA: Napa Co.; common in dry grassy areas and along dirt road, ca. 1 mi ne of Snell Peak (Aetna Springs 7.5' quad). 335 Comment
  UCD114492  Boechera suffrutescens R. E. Preston 1996-7-14 941 Nevada ca. 0.5 mi w of Sage Hen Field Station. 1981 Comment
  UCD116313  Streptanthus tortuosus var. tortuosus Robert E. Preston 1988-5-21 591 Nevada along road to Washington, 1.5 miles north of Highway 20. 1219 Comment
  UCD163116  Streptanthus tortuosus subsp. truei Robert E. Preston 2014-6-6 2969 Nevada 3.2 mi N of North Columbia, canyon of the North Fork of the Yuba River, 1.2 mi W of Foote Crossing. 724 Comment
  UCD163126  Streptanthus tortuosus subsp. truei Robert E. Preston 2014-6-6 2969 Nevada 3.2 mi N of North Columbia, canyon of the North Fork of the Yuba River, 1.2 mi W of Foote Crossing. 724 Comment
  UCD163360  Epilobium Robert E. Preston 2014-6-3 2967 Nevada 0.15 mi W of Crystal Lake. 1838 Comment
  UCD163364  Lycopus uniflorus Robert E. Preston 2014-8-11 2985 Nevada 0.2 mi WSW of Crystal Lake, on margin of small unnamed lake. 1827 Comment
  UCD163365  Dulichium arundinaceum var. arundinaceum Robert E. Preston 2014-8-11 2986 Nevada 0.2 mi WSW of Crystal Lake, on margin of small unnamed lake. 1827 Comment
  UCD163366  Schoenoplectus subterminalis Robert E. Preston 2014-8-11 2987 Nevada 0.2 mi WSW of Crystal Lake, on margin of small unnamed lake. 1827 Comment
  UCD163368  Pyrola minor Robert E. Preston 2014-8-11 2988 Nevada West shore of Crystal Lake. 1792 Comment
  UCD163369  Brickellia greenei Robert E. Preston 2014-8-12 2989 Nevada 0.38 mi E of Crystal Lake. 1788 Comment
  UCD163370  Potamogeton epihydrus Robert E. Preston 2014-9-22 2991 Nevada Crystal Lake. 1792 Comment
  UCD77146  Brodiaea minor Robert E. Preston 2002-6-14 1816 Nevada Grass Valley, along McCourtney Rd, ca. 0.1 mi n of its jct with Ponderosa Way 680 Comment
  UCD78028  Streptanthus tortuosus var. tortuosus Robert E. Preston 1998-4-19 1095 Nevada Shingle Falls, on outcrops adjacent to upper falls 182 Comment
  UCD84704  Phacelia racemosa Robert E. Preston 2009-6-1 2686 b Nevada ca. 5.25 mi N of Emigrant Gap, ca. 0.6 mi NW of Camp 19. 1706 Comment
  UCD84705  Claytonia rubra Robert E. Preston 2009-6-1 2686 c Nevada ca. 5.25 mi N of Emigrant Gap, ca. 0.6 mi NW of Camp 19. 1706 Comment
  UCD84706  Epilobium foliosum Robert E. Preston 2009-6-1 2686 d Nevada Ca. 5.25 miles N of Emigrant Gap, ca. 0.6 mi NW of Camp 19. 1706 Comment
  UCD84707  Mimulus pulsiferae Robert E. Preston 2009-6-1 2686 e Nevada ca. 5.25 mi N of Emigrant Gap, ca. 0.6 mi NW of Camp 19. 1706 Comment
  UCD84708  Pseudostellaria sierrae Robert E. Preston 2009-6-1 2687 Nevada Ca. 5.25 mi N of Emigrant Gap, ca. 0.4 mi NW of Camp 19. 1623 Comment
  UCD120832  Plagiobothrys hispidulus Robert E. Preston 1996-7-14 963 Nevada W of meadow on W side of Hwy 89, adjacent to Sage Hen Creek. 1926 Comment
  UCD114321  Boechera divaricarpa Robert E. Preston 1984-6-13 460 Placer ca. 3.2 km W of Sunnyside. 2013 Comment
  UCD114471  Boechera retrofracta Robert E. Preston 1984-6-13 457 Placer ca. 4 km w of Sunnyside, along Churchevel Rd. 2100 Comment
  UCD116197  Turritis glabra Robert E. Preston 1984-6-13 456 Placer Ca. 4 km W of Sunnyside, along Churchevel Road. 2100 Comment
  UCD163053  Trifolium retusum Robert E. Preston 2014-4-22 2959 Placer 1.8 mi SE of Sheridan, on terraces adjacent to Yankee Slough, E of old Hwy 65. 30 Comment
  UCD163103  Eleocharis engelmannii var. engelmannii Robert E. Preston 2014-5-12 2962 Placer 2.1 mi SE of Sheridan, E of Old Hwy 65, S of Yankee Slough. 36 Comment
  UCD163359  Brodiaea coronaria Robert E. Preston 2014-5-12 2961 Placer 2.1 mi SE of Sheridan, E of Old Hwy 65, S of Yankee Slough. 34 Comment
  UCD163374  Brodiaea appendiculata Robert E. Preston 2015-4-6 2995 Placer 2.3 mi SW of Sheridan, at Yankee Slough Wetland Preserve. 40 Comment
  UCD163379  Trichostema lanceolatum Robert E. Preston 2015-5-29 3000 Placer 1.8 mi SE of Sheridan, 0.5 mi E of Old Hwy 65, 0.25 mi N of Yankee Slough. 33 Comment
  UCD163424  Epilobium campestre Robert E. Preston 2015-5-29 3001 Placer 1.8 mi SE of Sheridan, 0.5 mi E of Old Hwy 65, 0.25 mi N of Yankee Slough. 33 Comment
  UCD163425  Epilobium cleistogamum Robert E. Preston 2015-5-29 3002 Placer 1.8 mi SE of Sheridan, 0.5 mi E of Old Hwy 65, 0.25 mi N of Yankee Slough. 33 Comment
  UCD163426  Agrostis avenacea Robert E. Preston 2015-5-29 3003 Placer 1.8 mi SE of Sheridan, 0.5 mi E of Old Hwy 65, 0.25 mi N of Yankee Slough. 33 Comment
  UCD163427  Cynodon dactylon Robert E. Preston 2015-6-15 3004 Placer 1.7 mi SE of Sheridan, 0.4 mi E of Old Hwy 65, 0.1 mi N of Yankee Slough. 31 Comment
  UCD163428  Crypsis schoenoides Robert E. Preston 2015-6-15 3005 Placer 1.7 mi SE of Sheridan, 0.4 mi E of Old Hwy 65, 0.1 mi N of Yankee Slough. 31 Comment
  UCD166848  Euphorbia ocellata subsp. ocellata Robert E. Preston 2016-9-6 3070 Placer Yankee Slough Wetland Preserve, 2.4 mi SE of Sheridan. 37 Comment
  UCD166866  Dichelostemma capitatum Robert E. Preston 2016-3-31 3049 Placer Yankee Slough Preserve, 2.35 mi SSW of Sheridan. 34 Comment
  UCD55133  Downingia pusilla Robert E. Preston 2002-5-3 1788 Placer Ca. 3 mi. SSW of Lincoln; N of Orchard Creek. 35 Comment
  UCD77127  Brodiaea minor Robert E. Preston 2002-6-14 1817 Placer Auburn, along Dry Creek Rd, ca. 0.8 mi e of its jct with Hwy 49. 440 Comment
  UCD77141  Brodiaea coronaria Robert E. Preston 2004-4-25 2222 Placer Ca. 2.3 mi NW of Roseville, along Phillip Rd, ca. 1.25 mi W of its jct with Fiddyment Rd. 32 Comment
Read comments Jun 17 2014
  UCD77163  Brodiaea appendiculata Robert E. Preston 2004-4-25 2225 Placer Ca. 4 mi NE of Sheridan, along Camp Far West Rd 32 Comment
  UCD77164  Brodiaea coronaria Robert E. Preston 2003-5-25 2146 Placer Ca. 2.3 mi NW of Roseville, along Phillip Rd, 1.25 mi W of its jct with Fiddyment Rd 32 Comment
  UCD77174  Brodiaea coronaria Robert E. Preston 2004-4-25 2223 Placer Ca. 2.6 mi SE of Sheridan, along Nader Rd. 41 Comment
Read comments Jun 17 2014
  UCD77512  Anagallis minima Robert E. Preston 2002-4-26 1786 Placer Ca. 2.7 mi s of Lincoln, in field w of Industrial Ave 36 Comment
  UCD77559  Clarkia biloba subsp. brandegeeae Robert E. Preston 2004-6-12 2254 Placer Ca. 0.7 mile E of Colfax, along Iowa Hill Road. 342 Comment
  UCD78101  Dittrichia graveolens Robert E. Preston 2005-11-9 2368 Placer Between Roseville and Lincoln, at jct Sunset Blvd and Placer Corp Dr. 41 Comment
  UCD115876  Lepidium virginicum Robert E. Preston 1984-6-13 455 Placer On W side of Lake Tahoe, ca. 0.4 km N of Kaspian campground, along the margins of bike trail. 1902 Comment
  CHSC33836  Rorippa palustris var. hispida R. E. Preston 1981-8-2 117 Plumas On gravel bar, s bank of Middle Fork of Feather River. Minerva Bar, ca. 9.6 km s of Quincy. 1150 Comment
  CHSC35017  Cardamine pachystigma R. E. Preston 1982-3-20 194 Plumas W side of Hwy 70 at Pauls Cr; ca. 2 mi sw of Belden. 658 Comment
  CHSC36676  Boechera breweri R. E. Preston 1982-4-29 270 Plumas At roadside; ca. 0.3 mi s of Hwy 70 bridge at Rock Creek. 518 Comment
  CHSC38085  Streptanthus tortuosus var. suffrutescens R. E. Preston 1983-5-26 387 Plumas At roadside, Hwy 70 ca. 1/2 mi e of Caribou Rd. 731 Comment
  CHSC52773  Aquilegia formosa var. truncata R. E. Preston 1981-7-8 27 Plumas N slope of Humbolt Peak, ca. 5.5 km NE of Jonesville 2040 Comment
  UCD116279  Streptanthus tortuosus Robert E. Preston 1983-5-26 387 Plumas Highway 70, 0.8 km east of Caribou Road. 732 Comment
  UCD114120  Boechera Robert E. Preston 1982-4-29 271 Plumas Hwy 70, n side of Chips Cr. 656 Comment
  UCD114129  Boechera pauciflora Robert E. Preston 1985-4-4 513 Plumas Chips Creek, at confluence with North Fork Feather River, w side of Hwy 70. 670 Comment
  UCD114131  Boechera arcuata Robert E. Preston 1985-4-4 514 Plumas 0.8 mi E of Belden, N side of Hwy 70. Comment
  UCD114358  Boechera breweri R. E. Preston 1982-4-29 273 Plumas ca. 30 yds e of Chips Creek, between Forest and Riparian zone, ca. 100 yds n of Hwy 70. 655 Comment
  JEPS95221  Kallstroemia californica Robert E. Preston 1997-10-2 1051 Riverside Palo Verde Mesa, at NE base of Mule Mountains 35 Comment
  UCD77301  Achyronychia cooperi Robert E. Preston 1997-11-11 1063 Riverside east edge of Palo Verde Mesa 99 Comment
  UCD77309  Allionia incarnata Robert E. Preston 1997-11-11 1062 Riverside east edge of Palo Verde Mesa 99 Comment
  UCD77526  Euphorbia micromera Robert E. Preston 1997-11-11 1060 Riverside east edge of Palo Verde Mesa. 99 Comment
  UCD77786  Kallstroemia californica Robert E. Preston 1997-10-2 1051 Riverside Palo Verde Mesa, at ne base of Mule Mountains. 114 Comment
  UCD77964  Psorothamnus emoryi Robert E. Preston 1997-11-11 1064 Riverside east edge of Palo Verde Mesa 99 Comment
  UCR146287  Kallstroemia californica Robert E. Preston 1997-10-2 1051 Riverside Sonoran (Colorado) Desert, Palo Verde Mesa, at NE base of Mule Mountains 35 Comment
  JEPS110483  Limnanthes striata Robert E. Preston 2004-4-16 2210 Sacramento Kiefer Landfill, ca. 1.5 mi NE of Sloughhouse. 45 Comment
  JEPS110488  Juncus tenuis Robert E. Preston 2004-6-6 2250 a Sacramento Ca. 4.5 mi E of Florin, in field NE of the int. Florin Rd and Knox Rd. 22 Comment
  JEPS117734  Dichelostemma lacuna-vernalis Robert E. Preston 2008-3-12 2586 Sacramento on E side of Ione Rd, 2.3 mi S of jct with Hwy 16 85 Comment
  UCD101155  Rumex crispus Robert E. Preston 1995-4-25 861 Sacramento CA: Sacramento Co; ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD101468  Rumex pulcher Robert E. Preston 1995-4-25 859 Sacramento Sacramento Co; ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD101810  Crassula aquatica Robert E. Preston 1995-4-14 770 Sacramento Sheldon North Vernal Pool Preserve; Sheldon North development, about 1.5 miles east of Hwy 99, S of Calvine Road. 10 Comment
  UCD102943  Saxifraga Robert E. Preston 1996-3-17 903 Sacramento Sloughhouse Road Vernal Pool Preserve, 0.75 miles S of Hwy 16, 200 ft W of Sloughhouse Rd. 45 Comment
  UCD103075  Erodium botrys Robert E. Preston 1995-4-24 821 Sacramento Sacramento Co.; Sheldon North development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. 10 Comment
  UCD105206  Mollugo verticillata Robert E. Preston 2010-7-20 2815 Sacramento E of Rancho Cordova, W of Scott Rd, 2.5 mi S of its jct with White Rock Rd. 64 Comment
  UCD105271  Dichelostemma capitatum Robert E. Preston 2010-4-3 2737 Sacramento Along Scott Rd, 0.95 mi S of Deer Creek. 64 Comment
  UCD105526  Dichelostemma capitatum Robert E. Preston 2010-4-3 2736 Sacramento Along Scott Rd, 1.6 mi S of its jct with White Rock Rd. 94 Comment
  UCD105527  Dichelostemma capitatum Robert E. Preston 2010-4-3 2738 Sacramento Along Scott Rd, ca. 0.5 mi N of its jct with Latrobe Rd. 57 Comment
  UCD105563  Eleocharis pachycarpa Robert E. Preston 2010-5-21 2794 Sacramento E of Rancho Cordova, W of Scott Rd, 2.5 mi S of its jct with White Rock Rd. 64 Comment
  UCD105564  Trifolium glomeratum Robert E. Preston 2010-5-21 2793 Sacramento E of Rancho Cordova, W of Scott Road, 2.5 miles S of its jct with White Rock Road. 64 Comment
  UCD107906  Trifolium bifidum var. decipiens Robert E. Preston 1995-4-24 816 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development, ca. 1.5 miles E of Highway 99, S of Calvine Road. 10 Comment
  UCD108288  Trifolium ciliolatum Robert E. Preston 1995-4-24 813 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development, ca. 1.5 miles E of Highway 99, S of Calvine Road. 10 Comment
  UCD108331  Trifolium depauperatum Robert E. Preston 1995-4-14 754 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development, ca. 1.5 miles E of Highway 99, S of Calvine Road. 10 Comment
  UCD109168  Trifolium microdon Robert E. Preston 1995-4-24 814 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. 10 Comment
  UCD109415  Trifolium variegatum Robert E. Preston 1995-4-1 738 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 miles SW of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD109416  Trifolium variegatum Robert E. Preston 1995-4-14 758 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. 10 Comment
  UCD109417  Trifolium variegatum Robert E. Preston 1995-4-17 805 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi SW of interstate Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD120880  Plagiobothrys greenei Robert E. Preston 1994-4-18 649 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD120993  Plagiobothrys stipitatus Robert E. Preston 1994-4-18 641 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD121014  Plagiobothrys stipitatus var. micranthus Robert E. Preston 1995-4-14 759 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development, ca 1.5 mi e of Hwy 99, s of Calvine Rd. Comment
  UCD121053  Plagiobothrys undulatus Robert E. Preston 1994-4-18 640 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD122346  Castilleja campestris Robert E. Preston 1994-4-18 648 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD122956  Mimulus tricolor Robert E. Preston 1994-4-18 655 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD123728  Gratiola ebracteata Robert E. Preston 1994-4-18 654 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD125413  Pogogyne douglasii Robert E. Preston 1994-4-18 647 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD125429  Pogogyne zizyphoroides Robert E. Preston 1994-4-18 646 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD126393  Legenere limosa Robert E. Preston 1993-5-6 623 Sacramento in field around 0.25 mile north of Sheldon Road, around 0.75 miles east of its junction with Highway 99. 10 Comment
  UCD133709  Lasthenia fremontii Robert E. Preston 1994-4-18 656 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD133747  Lasthenia glaberrima Robert E. Preston 1994-4-18 657 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD135279  Psilocarphus brevissimus Robert E. Preston 1994-4-18 639 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD135296  Psilocarphus oregonus Robert E. Preston 1994-4-18 642 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD135843  Isoetes howellii Robert E. Preston 1995-4-1 746 Sacramento Vernal Pool Preserve, ca. 0.8 mi SW of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD138209  Triglochin scilloides Robert E. Preston 1994-4-18 653 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD139110  Brodiaea coronaria Robert E. Preston 2003-5-6 2118 Sacramento Rio Linda, along Elverta Ave., 0.9 mi W of Fry Creek. 15 Comment
  UCD139322  Triteleia hyacinthina Robert E. Preston 1994-4-18 645 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD139372  Triteleia laxa Robert E. Preston 1995-4-17 792 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi SW of interstate Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD139428  Dichelostemma capitatum subsp. capitatum Robert E. Preston 1995-4-14 757 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. 10 Comment
  UCD139658  Fritillaria agrestis Robert E. Preston 1996-3-17 902 Sacramento Sloughhouse Road Vernal Pool Preserve, 0.75 miles S of Hwy 16, 200 ft W of Sloughhouse Rd. 45 Comment
  UCD142847  Juncus uncialis Robert E. Preston 1995-4-24 829 Sacramento Sacramento Co.; Sheldon North development, ca. 1.5 mi east of Hwy 99, south of Calvine Rd. 10 Comment
  UCD147863  Brodiaea rosea subsp. vallicola Robert E. Preston 2007-5-7 2483 Sacramento S of Mather Field, along Eagles Nest Rd, 1 mi N of Hwy 16. 43 Comment
  UCD148229  Brodiaea rosea subsp. vallicola Robert E. Preston 2010-5-21 2796 Sacramento E of Rancho Cordova, W of Scott Rd, 2.5 mi S of its jct with White Rock Rd. 79 Comment
  UCD148237  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-3-24 2898 Sacramento E of Rancho Cordoba, along Scott Rd, 1.2 mi S of its jct with White Rock Rd. 93 Comment
  UCD163110  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2014-3-22 2949 Sacramento Along Hwy 16, at jct with lone-Michigan Bar Rd. 90 Comment
  UCD48521  Navarretia leucocephala Robert E. Preston 1994-4-22 662 Sacramento Sacramento Co.; Sloughhouse Road vernal pool preserve, ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. (U.S.G.S. Sloughhouse 7.5' quad). 54 Comment
  UCD49699  Eleocharis acicularis var. occidentalis Robert E. Preston 1995-4-25 860 Sacramento CA: Sacramento Co; ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD49789  Eleocharis macrostachya Robert E. Preston 1995-4-25 857 Sacramento CA: Sacramento Co.; ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD55085  Downingia bicornuta Robert E. Preston 1995-4-17 776 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi SW of interstate Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD55087  Downingia bicornuta Robert E. Preston 1994-4-18 658 Sacramento North of Elk Grove and E of Hwy. 99, just SW of the intersection of Elk Grove Florin Road and Calvine Road. Sheldon North Vernal Pool Preserve. 10 Comment
  UCD55115  Downingia ornatissima Robert E. Preston 1994-4-18 652 Sacramento North of Elk Grove and E of Hwy. 99, just SW of the intersection of Elk Grove Florin Road and Calvine Road. Sheldon North Vernal Pool Preserve. 10 Comment
  UCD55119  Downingia ornatissima Robert E. Preston 1995-4-17 777 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi SW of interstate Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD55767  Aira caryophyllea Robert E. Preston 1995-4-1 736 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 miles SW of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD55920  Alopecurus saccatus Robert E. Preston 1995-4-17 799 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi SW of interstate Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD55933  Alopecurus saccatus Robert E. Preston 1994-4-18 651 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD56205  Avena barbata Robert E. Preston 1995-4-25 837 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mi. SE of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD56311  Avena fatua Robert E. Preston 1995-4-25 839 Sacramento Ca. 0.8 mi. SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD56403  Avena fatua Robert E. Preston 1995-4-14 764 Sacramento Sheldon North development, ca. 1.5 mi. E of Hwy. 99, S of Calvine Rd. 10 Comment
  UCD57392  Briza minor Robert E. Preston 1995-4-1 737 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 miles SW of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD57394  Briza minor Robert E. Preston 1995-4-14 767 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development. Ca. 1.5 mi. E of Hwy. 99. S of Calvine Rd. 10 Comment
  UCD58302  Eleocharis acicularis Robert E. Preston 2006-4-22 2376 Sacramento Ca. 2 mi. NNW of Sloughhouse. On N side of Kiefer Blvd., 0.3 mi. NW of its jct. with Grant Line Rd. 51 Comment
  UCD58525  Bromus diandrus Robert E. Preston 1995-3-12 712 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD58586  Bromus diandrus Robert E. Preston 1995-4-14 766 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development. Ca. 1.5 mi. E of Hwy. 99, S of Calvine Rd. 10 Comment
  UCD58654  Bromus hordeaceus Robert E. Preston 1995-4-14 761 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development. Ca. 1.5 mi. E of Hwy. 99. S of Calvine Rd. 10 Comment
  UCD59967  Crypsis vaginiflora Robert E. Preston 1993-7-31 629 Sacramento 0.8 mile southwest of jct of Jackson Rd (Hwy 16) and Sloughhouse Rd. 54 Comment
  UCD62844  Deschampsia danthonioides Robert E. Preston 1994-4-18 650 Sacramento Sacramento Co. 10 Comment
  UCD66080  Lolium multiflorum Robert E. Preston 1995-4-25 836 Sacramento Ca. 0.8 mi. SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD66784  Glyceria declinata Robert E. Preston 1995-4-25 838 Sacramento Ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD77128  Brodiaea coronaria Robert E. Preston 2003-5-6 2119 Sacramento Rio Linda, along Elverta Ave., 0.9 mi W of Fry Creek. 15 Comment
Read comments Jun 17 2014
  UCD77129  Brodiaea nana Robert E. Preston 2003-5-9 2121 Sacramento Ca. 2.25 mi N of Sloughhouse, along Grant Line Rd, 0.8 mi NE of Kiefer Blv 60 Comment
  UCD77130  Brodiaea appendiculata Robert E. Preston 2003-5-9 2122 Sacramento Along Hwy 16, ca. 1.6 mi E of the Cosumnes River 56 Comment
  UCD77131  Brodiaea nana Robert E. Preston 2003-5-9 2123 Sacramento Along Ione Rd, ca. 2.4 mi S of its jct with Hwy 16. 74 Comment
  UCD77138  Brodiaea coronaria Robert E. Preston 2004-5-11 2241 a Sacramento Along Eagles Nest Rd, ca. 1 mi N of Hwy 16. 42 Comment
  UCD77142  Brodiaea coronaria Robert E. Preston 2003-5-9 2124 Sacramento Along Ione Rd, ca. 2.4 mi S of its jct with Hwy 16. 74 Comment
Read comments Jun 17 2014
  UCD77154  Brodiaea coronaria Robert E. Preston 2005-4-25 2338 Sacramento Kiefer Landfill Vernal Pool Preserve, ca. 1 mi NE of jct Grant Line Rd and Kiefer Blvd. 67 Comment
Read comments Jun 17 2014
  UCD77196  Brodiaea coronaria Robert E. Preston 2004-5-11 2241 Sacramento Along Ione Rd, 2.4 mi S of its jct with Hwy 16. 74 Comment
  UCD77198  Brodiaea minor Robert E. Preston 2004-5-11 2240 Sacramento Along Hwy 16, 1.6 mi E of the Cosumnes River. 56 Comment
  UCD77225  Medicago lupulina Robert E. Preston 2004-7-8 2269 Sacramento Florin, along Power Inn Rd, ca. 0.4 mi S of Elsie Lane 7 Comment
  UCD77274  Plantago virginica Robert E. Preston 2004-4-16 2208 Sacramento Kiefer Landfill, ca. 1.9 mi NNE of Sloughhouse 43 Comment
  UCD77323  Amaranthus palmeri Robert E. Preston 2004-9-9 2299 Sacramento Galt, at jct Simmerhorn Rd and Carillion Blvd 17 Comment
  UCD77324  Amaranthus hybridus Robert E. Preston 2004-9-3 2296 Sacramento Ca. 7.7 mi ENE of Galt, along Clay Station Rd 32 Comment
  UCD77524  Euphorbia nutans Robert E. Preston 2004-6-24 2263 Sacramento E of Florin, along Gerber Rd, 250 ft W of int with Bar DU Lane. 15 Comment
  UCD77558  Clarkia purpurea subsp. purpurea Robert E. Preston 2003-5-6 2117 Sacramento 1.2 miles N of Elverta, along Rio Lindo Blvd. 10 Comment
  UCD77871  Modiola caroliniana Robert E. Preston 2004-7-8 2268 Sacramento Florin, along Gerber Rd, between French Rd and Reese Rd 10 Comment
  UCD78000  Planodes virginica Robert E. Preston 1998-4-1 1090 Sacramento Elk Grove, ca. 0.2 mi N of Laguna Blvd where it crosses Elk Grove Creek 9 Comment
  UCD78014  Sporobolus indicus Robert E. Preston 2004-6-6 2250 Sacramento Ca. 4.5 miles E of Florin, in field NE of the int. Florin Rd and Know Rd 22 Comment
  UCD78082  Vicia benghalensis Robert E. Preston 2005-5-12 2342 Sacramento Sacramento, at jct Gerber Rd and Bradshaw Rd. 17 Comment
  UCD78100  Triphysaria versicolor subsp. faucibarbata Robert E. Preston 2006-4-22 2375 Sacramento Ca. 2 mi NNW of Sloughhouse, on N side of Kiefer Blvd, 0.3 mi NW of its jct with Grant Line Rd 51 Comment
  UCD78102  Dittrichia graveolens Robert E. Preston 2003-9-18 2178 Sacramento McClellan Air Park, along E side of Patrol Rd, N of Magpie Creek 16 Comment
  UCD78113  Dittrichia graveolens Robert E. Preston 2004-10-6 2303 Sacramento Fair Oaks, at CSUS Aquatic Center, jct Hazel Ave and Gold Country Blvd. 39 Comment
  UCD84690  Dichelostemma capitatum Robert E. Preston 2009-3-14 2653 Sacramento Fair Oaks, Phoenix Park. 82 Comment
  UCD85884  Hordeum marinum subsp. gussoneanum Robert E. Preston 1995-4-14 765 Sacramento Sheldon North development, ca. 1.5 mi. E of Hwy. 99, S of Calvine Rd. 10 Comment
  UCD85885  Hordeum marinum subsp. gussoneanum Robert E. Preston 1995-4-17 796 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi SW of interstate Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD86186  Taeniatherum caput-medusae Robert E. Preston 1995-4-1 733 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 miles SW of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD86442  Hordeum murinum subsp. leporinum Robert E. Preston 1995-4-17 795 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi SW of interstate Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD87659  Nassella pulchra Robert E. Preston 1995-4-17 809 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi SW of interstate Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD88929  Paspalum distichum Robert E. Preston 2004-6-6 2249 Sacramento ca. 4.5 miles east of Florin, NE of the intersection of Florin Road and Know Road. 22 Comment
  UCD89011  Phalaris lemmonii Robert E. Preston 1995-4-17 797 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi SW of interstate Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD90375  Poa annua Robert E. Preston 1995-3-12 700 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD90434  Poa secunda Robert E. Preston 1995-4-1 731 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 miles SW of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD94491  Vulpia myuros Robert E. Preston 1995-4-17 800 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi SW of interstate Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD95897  Ranunculus bonariensis var. trisepalus Robert E. Preston 1994-4-18 659 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD97499  Amaranthus palmeri Robert E. Preston 2004-9-9 2299 Sacramento Galt, at jct Simmerhorn Rd and Carillion Blvd 17 Comment
  UCR79727  Gratiola ebracteata Robert E. Preston 1993-4-28 621 Sacramento About 0.85 mi SW of junction of Sloughhouse Rd. and Jackson Rd. (Hwy 16) 55 Comment
  UCR79729  Legenere limosa Robert E. Preston 1993-5-6 623 Sacramento Florin 7.5' Q., c. 0.25 mi. north of Sheldon Road, c. 0.75 mi. east of junction with Hwy 99. 10 Comment
  UCR80891  Plagiobothrys trachycarpus Robert E. Preston 1993-4-22 619 Sacramento Proposed Sheldon North vernal pool preserve, c. 0.3 mi south of jct Calvine road with Southern Pacific Railroad Tracks 11 Comment
  SEINET12867767  Epilobium cleistogamum R. E. Preston 1994-5-25 667 Sacramento Sheldon North Vernal Pool Preserve. 11 Comment
  UCD100250  Calandrinia ciliata Robert E. Preston 1995-3-12 719 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. Comment
  UCD101753  Montia fontana Robert E. Preston 1995-2-16 692 Sacramento Folsom, 1.5 miles SE of junction of Blue Ravine Road and Green Valley Road. 152 Comment
  UCD101754  Montia fontana Robert E. Preston 1995-3-12 703 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD101818  Crassula solieri Robert E. Preston 1995-4-25 832 Sacramento 0.8 mile SW of intersection of Int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD101824  Crassula tillaea Robert E. Preston 1995-4-25 855 Sacramento 0.8 mile SW of Interstate Hwy 16 and Sloughhouse Road. 54 Comment
  UCD103048  Lythrum hyssopifolia Robert E. Preston 1994-5-25 669 Sacramento Sheldo North Vernal Pool Preserve. 10 Comment
  UCD103266  Erodium moschatum Robert E. Preston 1995-3-12 711 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD103373  Geranium dissectum Robert E. Preston 1995-4-25 853 Sacramento 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD104519  Acmispon wrangelianus Robert E. Preston 1995-4-24 817 Sacramento Sheldon North development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. 10 Comment
  UCD105262  Epilobium cleistogamum Robert E. Preston 1994-5-25 667 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD105350  Eschscholzia lobbii Robert E. Preston 1995-3-12 707 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD105611  Erodium botrys Robert E. Preston 1995-3-12 698 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD105943  Epilobium campestre Robert E. Preston 1994-5-25 668 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD107307  Lupinus bicolor Robert E. Preston 1995-4-1 750 Sacramento Sloughhouse Road Vernal Pool Preserve; ca. 0.8 mile sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD108287  Trifolium ciliolatum Robert E. Preston 1995-4-17 780 Sacramento 0.8 mile SW of Interstate Highway 16 and Sloughhouse Road. 54 Comment
  UCD108330  Trifolium depauperatum Robert E. Preston 1995-3-12 718 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD108396  Trifolium depauperatum var. truncatum Robert E. Preston 1995-4-25 843 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of Int. Highway 16 and Sloughhouse Road. 54 Comment
  UCD108865  Trifolium dubium Robert E. Preston 1995-4-1 735 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 miles SW of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD108867  Trifolium dubium Robert E. Preston 1995-4-24 815 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development, ca. 1.5 miles E of Highway 99, S of Calvine Road. 10 Comment
  UCD108951  Vicia sativa subsp. nigra Robert E. Preston 1995-4-24 820 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. 10 Comment
  UCD108955  Vicia sativa subsp. nigra Robert E. Preston 1995-4-25 833 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD109149  Vicia villosa subsp. varia Robert E. Preston 1995-4-14 756 Sacramento Sheldon North Vernal Pool Preserve. Sheldon North development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. 10 Comment
  UCD109150  Vicia villosa subsp. varia Robert E. Preston 1995-4-17 794 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD109636  Lupinus succulentus Robert E. Preston 1995-4-25 831 Sacramento 0.8 mile SW of intersection of Int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD109767  Trifolium hirtum Robert E. Preston 1995-4-25 844 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of Int. Highway 16 and Sloughhouse Road. 54 Comment
  UCD109869  Trifolium willdenovii Robert E. Preston 1995-4-1 751 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD109870  Trifolium willdenovii Robert E. Preston 1995-4-14 755 Sacramento Sheldon North Development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. 10 Comment
  UCD110452  Elatine rubella Robert E. Preston 1995-4-24 830 Sacramento Sheldon North development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. 10 Comment
  UCD110454  Elatine rubella Robert E. Preston 1995-4-25 842 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD110685  Viola douglasii Robert E. Preston 1995-3-12 713 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD111429  Trifolium microcephalum Robert E. Preston 1995-4-17 781 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD114149  Capsella bursa-pastoris Robert E. Preston 1995-3-12 709 Sacramento 0.8 mile SW of Interstate Highway 16 and Sloughhouse Road. 54 Comment
  UCD114559  Cardamine oligosperma Robert E. Preston 1995-3-12 720 Sacramento Sheldon North Development, 1.5 miles east of Highway 99, south of Calvine Road. 10 Comment
  UCD115161  Raphanus raphanistrum Robert E. Preston 1995-4-1 742 Sacramento 0.8 mile southwest of Interstate Highway 16 and Sloughhouse Road. 54 Comment
  UCD115308  Rorippa curvisiliqua Robert E. Preston 1993-6-4 628 Sacramento 1,600 feet south of Calvine Road, 800 feet west of its junction with the Southern Pacific Railroad tracks. 10 Comment
  UCD115772  Lepidium nitidum Robert E. Preston 1995-3-12 715 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD115810  Lepidium nitidum Robert E. Preston 1995-2-24 696 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD116057  Tropidocarpum gracile Robert E. Preston 1995-3-16 722 Sacramento SW of the junction of Highway 16 and Sunrise Blvd. 35 Comment
  UCD116455  Limnanthes alba Robert E. Preston 1995-4-17 782 Sacramento Sloughhouse Road Vernal Pool Preserve , 0.8 mile SW of Interstate Highway 16 and Sloughhouse Road. 54 Comment
  UCD116590  Sidalcea calycosa Robert E. Preston 1995-4-1 741 Sacramento Sloughhouse Road Vernal Pool Preserve, 0.8 mile southwest of Interstate Highway 16 and Sloughhouse Road. 54 Comment
  UCD117411  Anagallis minima Robert E. Preston 1995-4-17 771 Sacramento Sloughhouse Road Vernal Pool Preserve, 0.8 mile SW of Interstate Highway 16 and Sloughhouse Road. 54 Comment
  UCD117540  Anagallis arvensis Robert E. Preston 1995-4-24 811 Sacramento Sheldon North Vernal Pool Preserve development, 1.5 miles east of Highway 99, south of Calvine Road. 10 Comment
  UCD117541  Anagallis arvensis Robert E. Preston 1995-4-25 852 Sacramento 0.8 mile SW of Interstate Highway 16 and Sloughhouse Road. 54 Comment
  UCD118832  Dodecatheon clevelandii subsp. patulum Robert E. Preston 1995-3-12 714 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD119693  Amsinckia intermedia Robert E. Preston 1995-4-1 743 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD120769  Plagiobothrys austiniae Robert E. Preston 1995-4-1 739 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD120953  Plagiobothrys shastensis Robert E. Preston 1995-4-25 862 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD120964  Plagiobothrys trachycarpus Robert E. Preston 1993-4-22 619 Sacramento Proposed Sheldon North vernal pool preserve, ca. 0.3 mi s of jct Calvine Road with Southern Pacific Railroad tracks. 10 Comment
  UCD120994  Plagiobothrys stipitatus Robert E. Preston 1995-4-1 747 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD121074  Plagiobothrys Robert E. Preston 1995-4-1 749 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD121425  Cicendia quadrangularis Robert E. Preston 1995-4-17 772 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD121515  Zeltnera muehlenbergii Robert E. Preston 1994-6-20 671 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD121723  Galium aparine Robert E. Preston 1995-4-1 734 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD122331  Castilleja attenuata Robert E. Preston 1995-4-17 778 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD122332  Castilleja attenuata Robert E. Preston 1995-4-24 827 Sacramento Sheldon North development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. 10 Comment
  UCD122347  Castilleja campestris Robert E. Preston 1995-4-17 775 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD122957  Mimulus tricolor Robert E. Preston 1995-4-17 773 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD123385  Triphysaria eriantha Robert E. Preston 1995-2-24 697 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD123420  Triphysaria versicolor subsp. faucibarbata Robert E. Preston 1995-4-17 806 Sacramento ca. 0.8 miles southwest of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD123503  Callitriche heterophylla var. bolanderi Robert E. Preston 1995-4-17 802 Sacramento ca. 0.8 mile southwest of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD124772  Veronica peregrina subsp. xalapensis Robert E. Preston 1994-4-18 643 Sacramento Sheldon North Vernal Pool. 10 Comment
  UCD125430  Pogogyne zizyphoroides Robert E. Preston 1995-4-25 851 Sacramento ca. 0.8 miles southwest of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD127437  Lomatium utriculatum Robert E. Preston 1995-3-12 702 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD127491  Eryngium castrense Robert E. Preston 1994-5-25 666 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD128012  Sanicula bipinnatifida Robert E. Preston 1995-3-12 706 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD128421  Achyrachaena mollis Robert E. Preston 1995-4-25 847 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of Int. Highway 16 and Sloughhouse Road. 54 Comment
  UCD130905  Cotula coronopifolia Robert E. Preston 1995-4-25 840 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD132325  Hypochaeris glabra Robert E. Preston 1995-4-24 823 Sacramento Sheldon North development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. Sheldon North Vernal Pool Preserve. 10 Comment
  UCD132621  Leontodon saxatilis Robert E. Preston 1995-4-24 824 Sacramento Sheldon North development, ca. 1.5 mi e of Hwy 99, s of Calvine Rd. Sheldon North Vernal Pool Preserve. 10 Comment
  UCD133366  Hypochaeris glabra Robert E. Preston 1995-4-17 791 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD133680  Lasthenia californica subsp. californica Robert E. Preston 1995-4-25 848 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of Int. Highway 16 and Sloughhouse Road. 54 Comment
  UCD133710  Lasthenia fremontii Robert E. Preston 1995-4-17 774 Sacramento around 0.8 mile southwest of Interstate Highway 16 and Sloughhouse Road. 54 Comment
  UCD133748  Lasthenia glaberrima Robert E. Preston 1995-4-25 858 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD133846  Lasthenia minor Robert E. Preston 1995-4-14 752 Sacramento south of Jackson Road (Highway 16), southwest of its junction with Sunrise Blvd. 35 Comment
  UCD133865  Senecio vulgaris Robert E. Preston 1995-2-24 695 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD133866  Senecio vulgaris Robert E. Preston 1995-3-12 705 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD133913  Layia fremontii Robert E. Preston 1995-4-1 728 Sacramento ca. 0.8 miles southwest of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD134503  Micropus californicus Robert E. Preston 1995-4-25 849 Sacramento ca. 0.8 mi southwest of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD134587  Matricaria discoidea Robert E. Preston 1995-4-25 854 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD135297  Psilocarphus oregonus Robert E. Preston 1995-4-25 841 Sacramento ca. 0.8 mi southwest of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD135825  Isoetes orcuttii Robert E. Preston 1995-4-17 808 Sacramento Vernal Pool Preserve, ca. 0.8 mi SW of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD136114  Soliva sessilis Robert E. Preston 1995-4-17 790 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD139153  Brodiaea nana Robert E. Preston 1995-4-25 856 Sacramento ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD139314  Triteleia hyacinthina Robert E. Preston 1995-4-17 785 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD139427  Dichelostemma capitatum subsp. capitatum Robert E. Preston 1995-3-12 704 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD139534  Calochortus luteus Robert E. Preston 1995-4-25 845 Sacramento ca. 0.8 mi southwest of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD141398  Juncus bufonius Robert E. Preston 1995-4-14 768 Sacramento Sheldon North development, ca. 1.5 miles east of Hwy 99, south of Calvine Road. 10 Comment
  UCD141399  Juncus bufonius Robert E. Preston 1995-4-17 786 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD141421  Juncus capitatus Robert E. Preston 1995-4-24 819 Sacramento Sheldon North development, ca. 1.5 mi e of Hwy 99, S of Calvine Rd. 10 Comment
  UCD141422  Juncus capitatus Robert E. Preston 1995-4-17 787 Sacramento Sloughhouse Road Vernal Pool Preserve, ca. 0.8 mi sw of int. Hwy 16 and Sloughhouse Road. 54 Comment
  UCD48532  Navarretia leucocephala Robert E. Preston 1994-4-18 661 Sacramento Sacramento County, California. (U.S.G.S. Florin 7.5' quadrangle). 10 Comment
  UCD49752  Eleocharis macrostachya Robert E. Preston 1994-4-18 644 Sacramento Sheldon North Vernal Pool Preserve, Sacramento County, California. 10 Comment
  UCD95331  Eschscholzia californica Robert E. Preston 1995-4-17 798 Sacramento 0.8 mile SW of Interstate Highway 16 and Sloughhouse Road. 54 Comment
  UCD95862  Ranunculus aquatilis var. diffusus Robert E. Preston 1993-5-6 622 Sacramento 0.25 mile north of Sheldon Road, 0.75 mile east of its junction with Hwy 99. 10 Comment
  UCD95899  Ranunculus bonariensis var. trisepalus Robert E. Preston 1995-4-1 745 Sacramento Sloughhouse Road Vernal Pool Preserve; 0.8 mile SW of Interstate Highway 16 and Sloughhouse Road. 54 Comment
  UCD96249  Ranunculus muricatus Robert E. Preston 1994-4-18 660 Sacramento Sheldon North Vernal Pool Preserve. 10 Comment
  UCD96251  Ranunculus muricatus Robert E. Preston 1995-4-17 784 Sacramento Sloughhouse Road Vernal Pool Preserve, 0.8 mile west of Interstate Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD98060  Cerastium glomeratum Robert E. Preston 1995-3-12 708 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD98259  Minuartia californica Robert E. Preston 1995-3-12 716 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of int. Hwy. 16 and Sloughhouse Road. 54 Comment
  UCD98681  Silene gallica Robert E. Preston 1995-4-17 779 Sacramento 0.8 mile SW of Interstate Highway 16 and Sloughhouse Road. 54 Comment
  UCD99298  Spergularia rubra Robert E. Preston 1995-4-25 846 Sacramento Sloughhouse Road Vernal Pool Preserve. Ca. 0.8 mile SW of Int. Highway 16 and Sloughhouse Road. 54 Comment
  UCD77719  Eschscholzia hypecoides Robert E. Preston 1999-5-7 1217 San Benito Griswold Canyon, along New Idria Rd, 5.6 mi s of its jct with Panoche Rd, T16S R10E SW 1/4 S13 464 Comment
  UCD105549  Eremothera boothii subsp. condensata Robert E. Preston 2010-5-26 2802 San Bernardino NW Ivanpah Valley, 5.9 mi WSW of Primm. 1022 Comment
  UCD105550  Thymophylla pentachaeta var. belenidium Robert E. Preston 2010-5-25 2799 San Bernardino Clark Mountain Range, 1.9 mi ENE of Mountain Pass. 1426 Comment
  UCD105551  Eriogonum maculatum Robert E. Preston 2010-5-25 2797 San Bernardino Clark Mountain Range, 1.7 mi ENE of Mountain Pass. 1397 Comment
  UCD105553  Prenanthella exigua Robert E. Preston 2010-5-26 2800 San Bernardino Northern Ivanpah Valley, 1.5 mi WSW of Primm. 803 Comment
  UCD105554  Langloisia setosissima subsp. setosissima Robert E. Preston 2010-5-26 2801 San Bernardino Northern Ivanpah Valley, 2.9 mi WSW of Primm. 838 Comment
  UCD105555  Plantago patagonica Robert E. Preston 2010-5-27 2803 San Bernardino E base of Clark Mtn, 2.4 mi SE of Ivanpah Springs. 1210 Comment
  UCD105556  Langloisia setosissima subsp. punctata Robert E. Preston 2010-5-27 2805 San Bernardino E base of Clark Mtn, 1.4 mi SE of Ivanpah Springs. 1179 Comment
  UCD105557  Eriogonum pusillum Robert E. Preston 2010-5-27 2810 San Bernardino E base of Clark Mtn, 1.5 mi NE of Ivanpah Springs. 1100 Comment
  UCD105558  Centrostegia thurberi Robert E. Preston 2010-5-27 2809 San Bernardino E base of Clark Mtn, 1.4 mi NE of Ivanpah Springs. 1104 Comment
  UCD105559  Poa fendleriana subsp. longiligula Robert E. Preston 2010-5-27 2806 San Bernardino E base of Clark Mtn, 1.2 mi SE of Ivanpah Springs. 1175 Comment
  UCD105560  Bouteloua eriopoda Robert E. Preston 2010-5-27 2807 San Bernardino E base of Clark Mtn, 1.2 mi SE of Ivanpah Springs. 1175 Comment
  UCD105561  Eriastrum diffusum Robert E. Preston 2010-5-27 2804 San Bernardino E base of Clark Mtn, 1.5 mi SE of Ivanpah Springs. 1171 Comment
  UCD105562  Loeseliastrum schottii Robert E. Preston 2010-5-27 2808 San Bernardino E base of Clark Mtn, 1.3 miles NE of Ivanpah Springs. 1107 Comment
  UCD77276  Plantago ovata Robert E. Preston 1997-4-1 1024 San Bernardino 4 mi n of Helendale, sw of Helendale Airport. 792 Comment
  UCD77542  Chorizanthe spinosa Robert E. Preston 1997-4-1 1023 San Bernardino 15 mi w of Barstow, on s side of Hwy 58 685 Comment
  UCD114470  Boechera retrofracta Robert Preston; Laurie Preston 1983-6-15 399 San Bernardino ca. 0.6 mi e of Lost Lake. 1219 Comment
Read comments Jun 4 2014
  SDSU10673  Nuttallanthus texanus D. A. Preston 1962-3-4 1072 San Diego Kearny Mesa. Comment
  SDSU2505  Caulanthus heterophyllus var. heterophyllus D. Preston 1962-3-25 8145 San Diego Kearny Mesa. Comment
  SDSU4631  Lupinus succulentus D. A. Preston 1962-3-4 8078 San Diego North of Miramar. Comment
  UCD77125  Brodiaea jolonensis Robert E. Preston 2003-4-24 2114 San Diego Camp Pendleton Marine Corps Base, 2 mi S of Las Flores Creek, along E side of railroads tracks 28 Comment
  UCD77698  Eryngium pendletonense Robert E. Preston 2003-4-24 2115 San Diego Camp Pendleton Marine Corps Base, 2 mi S of Las Flores Creek, along E side of railroads tracks 29 Comment
  UCD77835  Acmispon micranthus Robert E. Preston 2003-4-24 2112 San Diego Camp Pendleton Marine Corps Base, 2 mi S of Las Flores Creek, along E side of railroads tracks 24 Comment
  UCD78128  Selaginella eremophila Robert E. Preston 2000-3-13 1302 San Diego Anza-Borrego Desert State Park, along s side of Hwy 78, ca. 1 mi w of Yaqui Pass Rd, T12S R5E, UTM 3666850N 556250E. 487 Comment
  JEPS110500  Eleusine tristachya Robert E. Preston 2004-11-16 2304 San Joaquin Ca. 6.9 mi SW of Stockton, between Middle River and Wing Levee Rd, N of Undine Rd. 2 Comment
  UCD129610  Blepharizonia plumosa Robert E. Preston 1996-9-27 1002 San Joaquin Lawrence Livermore National Laboratory, Site 300, on west-facing slope adjacent to Building 801. 350 Comment
  UCD129613  Blepharizonia plumosa Robert E. Preston 1996-10-4 1005 San Joaquin northwest slope of Black Butte, south of Corral Hollow Road, around 2 miles west of its junction with I-5. 152 Comment
  UCD129614  Blepharizonia plumosa Robert E. Preston 1996-9-27 1006 San Joaquin Lawrence Livermore National Laboratory, Site 300, on berms adjacent to Building 834. 316 Comment
  UCD130768  Dittrichia graveolens Robert E. Preston 2001-9-29 1776 San Joaquin Ca. 3.8 mi sw of Vernalis, at jct I-5 and I-580, along shoulder 158 Comment
  UCD60777  Echinochloa colona Robert E. Preston 2004-9-3 2291 San Joaquin Ca. 10.5 mi NE of Lodi, at jct Liberty Rd and Dry Creek Rd. 36 Comment
  UCD65697  Eriochloa acuminata Robert E. Preston 2004-8-27 2289 San Joaquin 7.4 mi E of Galt, along Elliot Rd. 27 Comment
  UCD77330  Ammannia coccinea Robert E. Preston 2004-9-3 2295 San Joaquin Ca. 9.1 miles NE of Lodi, at jct Liberty Road and Elliott Road. 32 Comment
  UCD77333  Androsace elongata subsp. acuta Robert E. Preston 2002-4-1 1782 San Joaquin Lawrence Livermore National Laboratory, Site 300. 365 Comment
  UCD77499  Centromadia fitchii Robert E. Preston 2004-7-30 2276 San Joaquin Ca. 13.4 mi NE of Lodi. 49 Comment
  UCD77521  Euphorbia ocellata subsp. ocellata Robert E. Preston 2004-7-29 2274 San Joaquin Ca. 13.4 mi NE of Lodi 49 Comment
  UCD77657  Eriogonum nudum var. pauciflorum Robert E. Preston 1997-10-14 1053 San Joaquin Lawrence Livermore National Laboratory, Site 300 457 Comment
  UCD77703  Eryngium castrense Robert E. Preston 2004-7-29 2273 San Joaquin Ca. 13.4 mi NE of Lodi. 40 Comment
  UCD77743  Glinus lotoides Robert E. Preston 2004-7-29 2275 San Joaquin Ca. 13.4 mi NE of Lodi 29 Comment
  UCD77898  Panicum miliaceum Robert E. Preston 2004-8-27 2290 San Joaquin 7.4 miles E of Galt, along Elliott Rd 27 Comment
  UCD78015  Sporobolus indicus Robert E. Preston 2004-9-3 2292 San Joaquin Ca. 9.9 miles NE of Lodi, along Liberty Rd, 0.1 mile E of Coyote Creek 30 Comment
  UCD78107  Dittrichia graveolens Robert E. Preston 2001-9-29 1776 San Joaquin Ca. 3.8 mi sw of Vernalis, at jct I-5 and I-580, along shoulder 158 Comment
Read comments Aug 15 2010
  UCD78112  Dittrichia graveolens Robert E. Preston 1997-9-23 1050 San Joaquin Lawrence Livermore Laboratory, Site 300, along Route 2 198 Comment
  UCD78137  Dichelostemma capitatum Robert E. Preston 2008-3-15 2587 San Joaquin 3.8 mi E of Clements, on W side of Cord Rd, 0.9 mi S of jct with Hwy 12 58 Comment
  UCD84694  Callitriche heterophylla var. bolanderi Robert E. Preston 2009-4-13 s.n. San Joaquin 12 mi NE of Lodi, at end of Mackville Rd, 1 mi N of its jct with Liberty Rd. 67 Comment
  UCD129611  Blepharizonia laxa Robert E. Preston 1996-9-27 1003 San Joaquin Lawrence Livermore National Laboratory, Site 300, on east-facing roadcut along Rout 4, around 0.6 miles west of its junction with Route 3. 396 Comment
  UCD129612  Blepharizonia laxa Robert E. Preston 1996-10-4 1004 San Joaquin east-facing bank on north side of Corral Hollow Road, around 1.8 mile west of it junction with I-5. 137 Comment
  UCD77701  Eryngium vaseyi var. vallicola Robert E. Preston 2000-7-31 1424 San Joaquin 3.2 mi e of Farmington, along Hwy 4, 40 Comment
  CAS-BOT-BC172626  Atriplex coronata Robert E. Preston 1998-6-12 1123 San Luis Obispo Carrizo Plain, 50 ft W of Soda Lake Rd, between Clarksberg Rd and College City Rd 588 Comment
  UCD105220  Cryptantha oxygona Robert E. Preston 2010-4-23 2771 San Luis Obispo San Luis Obispo County: Temblor Range, 6.1 mi ENE of Simmler. 1124 Comment
  UCD105224  Papaver hybridum Robert E. Preston 2010-3-31 2733 San Luis Obispo San Luis Obispo County: W side of Temblor Range, 3.7 mi NE of Simmler. 768 Comment
  UCD105229  Camissonia campestris Robert E. Preston 2010-3-31 2732 San Luis Obispo San Luis Obispo County: W side of Temblor Range, 3.7 mi NE of Simmler. 772 Comment
  UCD105237  Peritoma arborea var. globosa Robert E. Preston 2010-3-30 2723 San Luis Obispo San Luis Obispo County: W side of Temblor Range, 3.8 miles NE of Simmler. 777 Comment
  UCD105240  Androsace elongata subsp. acuta Robert E. Preston 2010-3-30 2724 San Luis Obispo San Luis Obispo County: W side of Temblor Range, 4.6 mi ENE of Simmler. 906 Comment
  UCD105241  Claytonia exigua subsp. exigua Robert E. Preston 2010-3-30 2726 San Luis Obispo San Luis Obispo County: W side of Temblor Range, 5.8 mi ENE of Simmler. 1039 Comment
  UCD105242  Descurainia pinnata subsp. glabra Robert E. Preston 2010-3-30 2725 San Luis Obispo San Luis Obispo County: W side of Temblor Range, 5.4 mi ENE of Simmler. 1031 Comment
  UCD105507  Dichelostemma capitatum Robert E. Preston 2010-4-23 2767 San Luis Obispo San Luis Obispo County: W slope of Temblor Range, 5.1 mi ENE of Simmler. 952 Comment
  UCD105534  Amsinckia vernicosa Robert E. Preston 2010-4-23 2769 San Luis Obispo San Luis Obispo County: W slope of Temblor Range, 5.6 mi ENE of Simmler. 1025 Comment
  UCD105539  Eschscholzia lemmonii subsp. lemmonii Robert E. Preston 2010-4-23 2766 San Luis Obispo San Luis Obispo County: W slope of Temblor Range, 5 mi ENE of Simmler. 920 Comment
  UCD105566  Cryptantha oxygona Robert E. Preston 2010-5-19 2792 San Luis Obispo San Luis Obispo County: Temblor Range, 6.1 mi ENE of Simmler. 1124 Comment
  UCD105568  Eriogonum maculatum Robert E. Preston 2010-5-19 2784 San Luis Obispo San Luis Obispo County: Temblor Range, 4.7 mi ENE of Simmler. 902 Comment
  UCD105569  Melica californica Robert E. Preston 2010-5-19 2786 San Luis Obispo San Luis Obispo County: Temblor Range, 5.7 mi ENE of Simmler. 1036 Comment
  UCD105573  Vicia hassei Robert E. Preston 2010-5-18 2782 San Luis Obispo San Luis Obispo County: Along Bitterwater Rd, ca. 10 mi N of Hwy 58. 662 Comment
  UCD105954  Androsace elongata subsp. acuta Robert E. Preston 2010-5-19 2789 San Luis Obispo San Luis Obispo County: Temblor Range, 5.9 mi ENE of Simmler. 1069 Comment
  UCD146986  Cryptantha intermedia Robert E. Preston 2010-4-23 2768 San Luis Obispo W slope of Temblor Range, 5.2 mi ENE of Simmler. 995 Comment
  UCD77311  Allium hickmanii Robert E. Preston 2000-4-11 1330 San Luis Obispo San Luis Obispo County: Ca. 2.2 mi n of Point Piedras Blancas, 0.2 mi n of Arroyo del Oso. 15 Comment
  UCD77374  Atriplex Robert E. Preston 1998-6-17 1143 San Luis Obispo Carrizo Plain, along Simmler-Soda Lake Rd, ca. 2.8 mi S of its jct with Elkhorn Rd 591 Comment
  UCD77378  Atriplex Robert E. Preston 1998-6-17 1141 San Luis Obispo Carrizo Plain, N of Soda Lake, along 7 Mile Rd, 2.3 mi E of its jct with Soda Lake Rd 585 Comment
  UCD77380  Atriplex coronata Robert E. Preston 1998-6-17 1147 San Luis Obispo 1.3 mi E of Simmler, on N side of Hwy 58, ca. 300 ft N of road 633 Comment
  UCD77382  Atriplex Robert E. Preston 1998-6-17 1146 San Luis Obispo 1.3 mi E of Simmler, on N side of Hwy 58, ca. 300 ft N of road 633 Comment
  UCD77391  Atriplex Robert E. Preston 1998-6-11 1108 San Luis Obispo Carrizo Plain, 1.1 mi N of California Valley, on W side of Soda Lake Rd 603 Comment
  UCD77394  Atriplex coronata Robert E. Preston 1998-6-17 1142 San Luis Obispo Carrizo Plain, N of Soda Lake, along 7 Mile Rd, 2.3 mi E of its jct with Soda Lake Rd 585 Comment
  UCD77410  Atriplex coronata Robert E. Preston 1998-6-12 1123 San Luis Obispo Carrizo Plain, 50 ft W of Soda Lake Rd, between Clarksberg Rd and College City Rd 588 Comment
  UCD77412  Atriplex californica Robert E. Preston 1998-6-14 1127 San Luis Obispo Shell Beach, on cliffs, just above high tide line Comment
  UCD77417  Atriplex Robert E. Preston 1998-6-11 1109 San Luis Obispo Carrizo Plain, 0.75 mi SW of California Valley, on W side of Soda Lake Rd 597 Comment
  UCD77433  Calycadenia villosa Robert E. Preston; John Dittes 1998-6-11 1111 a San Luis Obispo Morrison Ranch, ca. 1 mi E of ranch headquarters, on ridge between Camatta Creek and Long Canyon 579 Comment
  UCD77434  Calycadenia villosa Robert E. Preston 1998-6-17 1140 San Luis Obispo on plateau between Camatta Creek and Navaho Creek, ca. 0.25 mi S of jct Red Hill Rd and Hwy 58 611 Comment
  UCD77438  Camissoniopsis hirtella Robert E. Preston 1998-6-16 1133 San Luis Obispo San Luis Obispo County: Ca. 5 miles E of Santa Margarita, along N side of Hwy 58 430 Comment
  UCD77441  Camissoniopsis intermedia Robert E. Preston 1998-6-16 1131 San Luis Obispo San Luis Obispo County: Along N ridge of Rocky Canyon, 0.2 mile E of Adobe Canyon 426 Comment
  UCD77445  Camissoniopsis hardhamiae Robert E. Preston 1998-6-10 1107 San Luis Obispo San Luis Obispo County: Ca. 4 miles E of Santa Margarita, along N side of Hwy 58, 0.2 mi W of its jct with Hwy 229 365 Comment
  UCD77449  Eulobus californicus Robert E. Preston 1998-6-12 1114 San Luis Obispo San Luis Obispo County: Ca. 17 miles E of Santa Margarita, on N side of Hwy 58, 0.5 mile E of Wilson Corner. 487 Comment
  UCD77476  Carex brevicaulis Robert E. Preston 2000-4-10 1329 San Luis Obispo San Luis Obispo County: Ca. 3 mi n of Point Piedras Blancas, 0.1 mi s of Arroyo de la Cruz, on roadcut. 15 Comment
  UCD77528  Matricaria occidentalis Robert E. Preston 1998-6-11 1110 San Luis Obispo San Luis Obispo County: Carrizo Plain, 0.8 mi SW of California Valley, on W side of Soda Lake Rd. 595 Comment
  UCD77532  Chorizanthe breweri Robert E. Preston 1998-6-15 1128 San Luis Obispo San Luis Obispo County: Cuesta Ridge 731 Comment
  UCD77534  Chorizanthe uniaristata Robert E. Preston 1998-6-16 1135 San Luis Obispo San Luis Obispo County: ca. 1 mi W of Shell Creek, ca. 0.2 mi N of Hwy 58, in small arroyo. 463 Comment
  UCD77538  Chorizanthe uniaristata Robert E. Preston 1998-6-12 1119 San Luis Obispo San Luis Obispo County: near base of N slope of Syncline Hill, 0.2 mi S of Hwy 58 at E end of the San Juan Grade. 640 Comment
  UCD77541  Chorizanthe obovata Robert E. Preston 1998-6-10 1106 San Luis Obispo San Luis Obispo County: Atascadero, 300 ft NW of intersection Atascadero Rd and San Diego Rd. 293 Comment
  UCD77545  Chorizanthe biloba Robert E. Preston 1998-6-12 1117 San Luis Obispo San Luis Obispo County: on hillside ca. 300 W of Navaho Creek, ca. 0.25 mi S of Hwy 58 487 Comment
  UCD77550  Clarkia tembloriensis subsp. tembloriensis Robert E. Preston 1998-6-12 1122 San Luis Obispo San Luis Obispo County: Near base of N slope of Syncline Hill, 0.2 mi S of Hwy 58 at E end of the San Juan Grade 640 Comment
  UCD77637  Eriastrum pluriflorum Robert E. Preston 1998-6-12 1121 San Luis Obispo San Luis Obispo County: Near base of N slope of Syncline Hill, 0.2 mile S of Hwy 58 at E end of the San Juan Grade. 640 Comment
  UCD77648  Eriogonum angulosum Robert E. Preston 1998-6-16 1134 San Luis Obispo ca. 1.2 mi W of Shell Creek, ca. 0.25 mi N of Hwy 58 472 Comment
  UCD77668  Eriogonum clavatum Robert E. Preston 1998-6-17 1144 San Luis Obispo Carrizo Plain, E side of Soda Lake, along Simmler-Soda Lake Rd, ca. 3 mi S of its jct with Elkhorn Rd 591 Comment
  UCD77736  Geranium core-core Robert E. Preston 2000-4-26 1338 San Luis Obispo San Luis Obispo County: Ca. 3 mi n of Point Piedras Blancas, 0.2 mi s of Arroyo de la Cruz, along roadsides, 35? 42' 29' N, 121? 18' 00' W 15 Comment
  UCD77756  Deinandra pentactis Robert E. Preston 1998-6-12 1115 San Luis Obispo San Luis Obispo County: 17 mi E of Santa Margarita, on N side of Hwy 58, 0.5 mi E of Wilson Corner 487 Comment
  UCD77774  Hollisteria lanata Robert E. Preston 1998-6-17 1138 San Luis Obispo San Luis Obispo County: ca. 28 mi E of Santa Margarita, ca. 0.25 mi SE of Hwy 58 at Navaho Creek, on stream bank and lower hill slopes 487 Comment
  UCD77801  Layia pentachaeta subsp. albida Robert E. Preston 1997-4-10 1026 San Luis Obispo San Luis Obispo County: 1.1 mi w of Cottonwood Pass 518 Comment
  UCD77831  Loeflingia squarrosa Robert E. Preston 1998-6-12 1112 San Luis Obispo ca. 17 mi E of Santa Margarita, on N side of Hwy 58, 0.5 mi E of Wilson Corner 487 Comment
  UCD77878  Mucronea californica Robert E. Preston 1998-6-12 1116 San Luis Obispo San Luis Obispo County: ca. 0.5 mi W of Shell Creek, along S side of Hwy 58 457 Comment
  UCR146288  Clarkia tembloriensis subsp. tembloriensis Robert E. Preston 1998-6-12 1122 San Luis Obispo Near base of N slope of Syncline Hill, 0.2 mi south of Hwy 58 at E end of the San Juan Grade 640 Comment
  CAS-BOT-BC168620  Atriplex Robert E. Preston 1998-6-11 1111 San Luis Obispo 1 mi Sw of California Valley, on W side of Soda Lake Rd 594 Comment
  CAS-BOT-BC242507  Eriogonum clavatum Robert E. Preston 1998-6-17 1144 San Luis Obispo Carrizo Plain, E side of Soda Lake, along Simmler-Soda Lake Rd, ca. 3 mi S of its jct with Elkhorn Rd; TRS Comment
  SEINET3930311  Atriplex californica Robert E. Preston 1998-6-14 1127 San Luis Obispo Shell Beach, on cliffs, just above high tide line; TRS.; 0 Comment
  SEINET3931246  Atriplex coronata Robert E. Preston 1998-6-17 1147 San Luis Obispo 1.3 mi E of Simmler, on N side of Hwy 58, ca. 300 ft. N of road. Simmler 7.5' quad.; 0 634 Comment
  UCD129802  Calycadenia villosa Robert E. Preston 1998-6-11 1111 A San Luis Obispo San Luis Obispo County: Morrison Ranch, ca. 1 mile east of ranch headquarters; on ridge between Camatta Creek and Long Canyon. 579 Comment
  UCD129803  Calycadenia villosa Robert E. Preston 1998-6-17 1140 San Luis Obispo San Luis Obispo County: on plateau between Camatta Creek and Navajo Creek , ca. 0.25 mile south of junction Red Hill Road and Hwy 58. Comment
  UCD48412  Navarretia jaredii Robert E. Preston 1998-6-15 1130 San Luis Obispo CA: San Luis Obispo Co.; north slope of Cuesta Ridge (San Luis Obispo quad). 548 Comment
  UCD48442  Navarretia mitracarpa Robert E. Preston 1998-6-12 1118 San Luis Obispo CA: San Luis Obispo Co; on hillside ca. 300 W of Navaho Creek, ca. 0.25 mi S of Hwy 58 (La Panza Ranch 7.5' quad). 487 Comment
  UCD52918  Arctostaphylos obispoensis Robert E. Preston 1999-3-29 1207 San Luis Obispo Ca. 6 mi. NE of Morro Bay. 304 Comment
  UCD52925  Arctostaphylos obispoensis Robert E. Preston 1999-2-26 1202 San Luis Obispo Cuesta Ridge, along TV Tower Rd. 731 Comment
  UCD77419  Atriplex argentea var. expansa Robert E. Preston 1999-9-29 1246 San Luis Obispo Carrizo Plains, along Soda Lake Rd, 0.25 mi S of Del Rosa Rd. T30S R19E NW 1/4 of SE 1/4 Sec 19 591 Comment
  UCD77507  Centromadia pungens Robert E. Preston 1999-7-9 1224 San Luis Obispo San Luis Obispo County: N of San Luis Obispo, along Stenner Creek Rd, 0.5 mi NW of where it is crossed by the RR tracks. 182 Comment
  UCD77516  Chaenactis glabriuscula var. megacephala Robert E. Preston 1999-5-7 1215 San Luis Obispo Upper end of Prieto Canyon, T26S R16E nw 1/4 of sw 1/4 Sec 14 600 Comment
  UCD77536  Chorizanthe palmeri Robert E. Preston 1999-7-9 1225 San Luis Obispo San Luis Obispo County: S slope of Cuesta Ridge, ca. 0.25 mi N of RR tracks, UTM 3913700 N, 713150 E 365 Comment
  UCD77757  Deinandra paniculata Robert E. Preston 1999-8-31 1239 San Luis Obispo San Luis Obispo County: Camatta Ranch, 487 Comment
  UCD78060  Trifolium angustifolium Robert E. Preston 2000-6-13 1377 San Luis Obispo San Luis Obispo County. Comment
  UCD78081  Vicia benghalensis Robert E. Preston 2000-6-13 1378 San Luis Obispo San Luis Obispo County: location unknown. Comment
  CAS-BOT-BC474768  Pogogyne serpylloides Robert E. Preston 2011-6-16 2865 San Mateo Santa Cruz Mountains. Oil Creek watershed, 1.8 mi NW of Waterman Gap 268 Comment
  UCD147019  Trifolium barbigerum Robert E. Preston 2011-6-16 2864 San Mateo Santa Cruz Mtns, Oil Creek watershed, 1.7 mi NW of Waterman Gap. 298 Comment
  UCD147020  Pogogyne serpylloides Robert E. Preston 2011-6-16 2865 San Mateo Santa Cruz Mtns, Oil Creek watershed, 1.8 mi NW of Waterman Gap. 268 Comment
  UCD148239  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-3-28 2900 San Mateo Hillsborough, along Crystal Springs Rd where it crosses under the Junipero Serra Freeway. 99 Comment
  UCD50393  Arctostaphylos andersonii Robert E. Preston 2001-6-11 1540 San Mateo Butano Ridge. 658 Comment
  UCD78049  Trifolium glomeratum Robert E. Preston 2004-6-10 2253 San Mateo Ca. 8 miles NW of Boulder Creek, in Pescadero Creek watershed. 162 Comment
  UCD78147  Leptospermum laevigatum Robert E. Preston 2008-4-1 2599 San Mateo Lower Crystal Springs Reservoir, 0.12 mi SW of jct Hwy 92 and Hwy 35 92 Comment
  UCD78149  Romulea rosea var. australis Robert E. Preston 2008-4-2 2601 San Mateo W slope of Buri Buri Ridge, ca. 0.4 mi NW of golf course. 75 Comment
  UCD78151  Amsinckia lunaris Robert E. Preston 2008-4-3 2603 San Mateo Near Lower Crystal Springs Reservoir, ca. 200 ft E of Sawyer Camp Trail, 0.5 mi NNE of its jct with Skyline Blvd 109 Comment
  UCD78192  Hoita orbicularis Robert E. Preston 2008-6-10 2640 San Mateo Between Lower Crystal Springs Reservoir and Crystal Springs Golf Course, ca. 0.33 mi W of jct Golf Course Rd and I-280 99 Comment
  UCD78193  Navarretia heterodoxa Robert E. Preston 2008-6-11 2641 a San Mateo Between Lower Crystal Springs Reservoir and Skyline Blvd, ca. 0.5 mi S of jct Skyline Blvd and Golf Course Rd 117 Comment
  UCD78194  Calochortus argillosus Robert E. Preston 2008-6-11 2641 b San Mateo Between Lower Crystal Springs Reservoir and Skyline Blvd, ca. 0.5 mi NW of jct Skyline Blvd and Crystal Springs Rd 99 Comment
  UCD84709  Cryptantha torreyana Robert E. Preston 2009-6-16 2688 b San Mateo Santa Cruz Mtns, ca. 0.5 mi NW of Waterman Gap. 347 Comment
  UCD84710  Gamochaeta ustulata Robert E. Preston 2009-6-16 2688 San Mateo Santa Cruz Mtns, ca. 0.5 mi NW of Waterman Gap. 347 Comment
  UCR148006  Rorippa nasturtium-aquaticum Robert E. Preston 2001-5-30 1535 San Mateo c. 9 mi NNW of Boulder Creek 305 Comment
  UCD77799  Lathyrus torreyi Robert E. Preston 2001-5-30 1536 San Mateo Ca. 9 mi nnw of Boulder Creek, T8S R3W sw 1/4 of se 1/4 Section 10 304 Comment
  UCD77838  Hosackia stipularis Robert E. Preston 2001-6-1 1538 San Mateo Ca. 7 mi nw of Boulder Creek. 658 Comment
  JEPS110506  Dittrichia graveolens Robert E. Preston 2006-10-14 2410 Santa Barbara Between Goleta and Gaviota, along Aniso Trail, between Canada del Refugio and Canada del Venadito. 13 Comment
  UCD124804  Scrophularia atrata Robert E. Preston 1991-5-30 600 Santa Barbara Manville, ca. 2 miles south of Lompo. Comment
  RSA670127  Pennisetum villosum Robert E. Preston 1994-3-28 636 Santa Barbara Santa Barbara, Los Carneros development ca. 0.25 mi nw of int. Hollister Ave. and Los Carneros Ave., in small detention basin. 6 Comment
  CHSC35997  Lepidium draba R. E. Preston 1982-6-20 307 Santa Clara At roadside; s side of Hwy 237, at the sw corner of its intersection with Zanker Rd, San Jose. Comment
  JEPS95220  Dittrichia graveolens R. E. Preston 1998-10-25 1199 Santa Clara Mountain View Shoreline Regional Park, along Stevens Creek 1 Comment
  UC1606993  Dittrichia graveolens Robert E. Preston 1994-11-14 690 Santa Clara at Alviso Marina (on bank of levee between parking lot and marina basin, s. end San Francisco Bay); San Francisco Bay, Milpitas 7.5' Quad. Comment
  UCD114843  Erysimum franciscanum Robert E. Preston 1994-5-9 665 Santa Clara Kirby Canyon Landfill. 182 Comment
  UCD115998  Streptanthus glandulosus subsp. albidus Robert E. Preston 1994-5-9 663 Santa Clara Metcalf Canyon, on serpentine roadcut. 182 Comment
  UCD116016  Streptanthus glandulosus subsp. glandulosus Robert E. Preston 1994-5-9 664 Santa Clara Kirby Canyon Landfill. 182 Comment
  UCD131228  Dittrichia graveolens Robert E. Preston 1994-11-14 690 Santa Clara south end of San Francisco Bay, at Alviso Marina, on bank of levee between parking lot and marina basin. 2 Comment
  UCD131229  Dittrichia graveolens Robert E. Preston; Linda Spar 1995-11-24 899 Santa Clara Milpitas, 100 feet east of Coyote Creek, adjacent to old Milpitas sewage disposal plant. 10 Comment
  UCD131230  Dittrichia graveolens Robert E. Preston 1995-11-24 900 Santa Clara northernmost San Jose (Alviso), in vacant lots north of State St. and west of Spreckles St. 1 Comment
  UCD131231  Dittrichia graveolens Robert E. Preston 1995-11-24 901 Santa Clara Sunnyvale, Baylands Park, on north side of bike path paralleling Highway 237. 1 Comment
  UCD148234  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-3-22 2895 Santa Clara Anderson Lake County Park, ca. 0.1 mi W of the E end of the dam. 179 Comment
  UCD77547  Cyclospermum leptophyllum Robert E. Preston 2002-10-20 1958 Santa Clara Sunnyvale. 14 Comment
  UCD78025  Streptanthus glandulosus subsp. glandulosus Robert E. Preston 2003-5-27 2149 Santa Clara Alameda Watershed Lands, along Arroyo Hondo, ca. 1.9 mi E of Calaveras Reservoir 271 Comment
  UCD78105  Dittrichia graveolens Robert E. Preston 1998-10-25 1199 Santa Clara Mountain View, Shoreline Regional Park, along Stevens Creek 1 Comment
  UCD105743  Lupinus affinis Robert E. Preston 1992-4-9 610 Santa Clara above tributary to Tar Creek, ca. 4.5 mi SSW of Gilroy. 152 Comment
  UCD107143  Trifolium angustifolium Robert E. Preston 1992-4-22 611 Santa Clara N side of Pescadero Creek, ca. 5.5 miles SSW of Gilroy. 121 Comment
  UCD107306  Lupinus bicolor Robert E. Preston 1992-4-9 608 Santa Clara N side of Tar Creek at jct with tributary stream, ca. 4.5 mi SSW of Gilroy. 143 Comment
  UCD111001  Oxalis pilosa Robert E. Preston 1992-4-9 609 Santa Clara E-facing slope above tributary of Tar Creek, 4.5 miles SSW of Gilroy. 198 Comment
  UCD116014  Streptanthus glandulosus subsp. glandulosus Robert E. Preston 1992-6-1 616 Santa Clara 3.5 miles SSW of Gilroy, in Carlyle Hills. 274 Comment
  UCD116055  Tropidocarpum gracile Robert E. Preston 1992-3-3 605 Santa Clara N of Tar Creek, ca. 0.3 mile NE of Sargent Oil Fields, ca. 4.5 miles SSW of Gilroy. 109 Comment
  UCD138184  Triglochin maritima Robert E. Preston 1992-4-9 606 Santa Clara N side of Tar Creek, ca. 4.5 miles SSW of Gilroy. 134 Comment
  JEPS106449  Dittrichia graveolens Robert E. Preston 2002-10-8 1954 Santa Cruz University of California, Santa Cruz, in field on S side of Music Center. 192 Comment
  JEPS110503  Crepis vesicaria subsp. taraxacifolia Robert E. Preston 2006-6-12 2402 Santa Cruz Ca. 6 mi N of Boulder Creek, along Hwy 9 at Waterman Gap. 384 Comment
  UCD166860  Epipactis helleborine Robert E. Preston 2016-6-22 3055 Santa Cruz Ben Lomond Mountain, 1.7 mi N of Bonny Doon School. 579 Comment
  UCD50272  Arctostaphylos andersonii Robert E. Preston 2002-10-9 1956 Santa Cruz Ca. 3 miles NW of Santa Cruz, on upper UC Santa Cruz campus, Marshall Fields. 346 Comment
  UCD78004  Solidago spathulata Robert E. Preston 2002-10-9 1957 Santa Cruz 3 mi NW of Santa Cruz, on upper UC Santa Cruz Campus, Marshall Fields. 342 Comment
  CHSC35619  Elymus elymoides subsp. elymoides R. E. Preston 1981-7-19 111 B Shasta Meadow. At the Sulfur Works, Lassen National Park. 2148 Comment
  CHSC38074  Boechera lemmonii R. E. Preston 1982-7-14 327 Shasta On NE ridge of Brokeoff Mtn, near summit; Lassen Volcanic National Park. 2682 Comment
  CHSC38075  Streptanthus tortuosus R. E. Preston 1982-7-14 328 Shasta NE ridge of Brokeoff Mountain, Lassen Volcanic National Park. 2621 Comment
  CHSC38077  Sisymbrium altissimum R. E. Preston 1983-7-14 331 Shasta At roadside, Subway Cave, ca. 1 mi N of Old Station. 1328 Comment
  CHSC38095  Boechera platysperma R. E. Preston 1983-8-6 402 Shasta SE side of Diamond Peak, near roadside, Lassen Volcanic National Park. 2218 Comment
  CHSC38097  Draba albertina R. E. Preston 1983-8-6 405 Shasta Ca. 100 ft E of Hat Creek, near trail to Terrace Lakes, ca. 1/2 mi S of Hat Lake. 1853 Comment
  CHSC38098  Barbarea orthoceras R. E. Preston 1983-8-6 406 Shasta Ca. 100 ft E of Hat Creek, ca. 1/2 mi S of Hat Lake, Lassen Volcanic National Park. 1853 Comment
  CHSC38099  Boechera rectissima R. E. Preston 1983-8-6 407 Shasta Along Terrace Lakes trail, ca. 1/2 mi S of Hat Lake, Lassen Volcanic National Park. 1853 Comment
  CHSC96043  Dittrichia graveolens Robert E. Preston 2006-10-27 2414 Shasta Redding, at Twin View Blvd interchange with I-5, along the N-bound onramp. 213 Comment
  JEPS110507  Dittrichia graveolens Robert E. Preston 2006-10-27 2415 Shasta Ca. 15 mi N of Redding, along N-bound I-5, 1.5 mi S of Gilman Rd. 459 Comment
  JEPS114038  Heliotropium europaeum Robert E. Preston 2007-9-6 2571 Shasta Ca. 15 mi NW of Redding, along Hwy 299, at Yankee Gulch. Comment
  UCD116297  Streptanthus tortuosus Robert E. Preston 1984-5-13 449 Shasta Highway 299, 5.3 km west of its junction with French Gulch Road. 512 Comment
  UCD116298  Streptanthus tortuosus Robert E. Preston 1984-5-19 450 Shasta Highway 299, south side of Clear Creek bridge. 390 Comment
  UCD116305  Streptanthus tortuosus Robert E. Preston 1984-6-20 465 Shasta O'Brien exit, I-5. 460 Comment
  UCD147018  Streptanthus tortuosus Robert E. Preston 2011-5-20 2863 Shasta Pit River Arm of Shasta Lake, 0.65 mi ENE of Jones Valley Campground, along Jones Valley Rd. 349 Comment
  UCD147021  Brodiaea nana Robert E. Preston 2012-5-5 2866 Shasta Millville Plains, 1.5 mi S of Millville, at jct Millville Plains Rd and Bascomb Rd. 193 Comment
  UCD147022  Chorizanthe polygonoides Robert E. Preston 2012-5-5 2867 Shasta Redding, at jct Oasis Rd and Gold Hills Dr, on rock outcrops N of the road. 196 Comment
  UCD147023  Trifolium glomeratum Robert E. Preston 2012-5-5 2869 Shasta 1.1 mi E of Igo, along Cloverdale Trail. 301 Comment
  UCD147024  Crucianella angustifolia Robert E. Preston 2012-5-5 2870 Shasta 1.3 mi E of Igo, along Cloverdale Trail. 283 Comment
  UCD147026  Pentagramma pallida Robert E. Preston 2012-5-5 2872 Shasta 1.4 mi E of Igo, along Cloverdale Trail, at Clear Creek overlook. 268 Comment
  UCD147027  Dichelostemma congestum Robert E. Preston 2012-5-5 2873 Shasta 1.5 mi E of Igo, along Cloverdale Trail. 278 Comment
  UCD147034  Scleranthus annuus subsp. annuus Robert E. Preston 2012-5-5 2868 Shasta Redding, at jct Oasis Rd and Gold Hills Dr, on rock outcrops N of the road. 196 Comment
  UCD147038  Brodiaea rosea Robert E. Preston 2012-6-24 2881 Shasta 1 mi NNE of Pollard Flat, along Eagles Roost Rd. 443 Comment
  UCD147039  Brodiaea rosea Robert E. Preston 2012-6-24 2882 Shasta 0.5 mi N of Gibson Maintenance Station, along Gibson Rd. 505 Comment
  UCD148228  Brodiaea matsonii Robert E. Preston 2009-6-24 2689 Shasta Redding, on S side of Keswick Dam Rd, 0.4 mi NE of its jct with Quartz Hill Rd, along W Branch of Sulphur Creek. 213 Comment
Read comments Mar 9 2015
  UCD148277  Polystichum imbricans Robert E. Preston 2013-9-5 2940 Shasta 1.2 mi NNE of Manton, along the North Fork of Battle Creek. 662 Comment
  UCD148278  Herniaria hirsuta var. hirsuta Robert E. Preston 2013-9-5 2941 Shasta 1.2 mi NNE of Manton, along the North Fork of Battle Creek. 662 Comment
  UCD56143  Anthoxanthum aristatum Robert E. Preston 2003-5-31 2154 a Shasta Redding, along Airport Rd. ca 2.4 mi south of Hwy. 44. 152 Comment
  UCD77139  Brodiaea coronaria Robert E. Preston 2004-5-8 2236 Shasta Ca. 3 mi N of Redding, along Twinview Blvd, 0.25 mi N of Oasis Rd 196 Comment
  UCD77160  Brodiaea californica Robert E. Preston 2005-7-1 2357 Shasta Redding, at jct Oasis Rd and Twin View Blvd. 195 Comment
  UCD77166  Brodiaea californica Robert E. Preston 2003-6-14 2158 Shasta 7.9 mi W of Cottonwood, along Gas Point Rd. 167 Comment
  UCD77167  Brodiaea coronaria Robert E. Preston 2003-6-14 2159 Shasta 3.4 mi W of Fall River Mills, along Pit No. 1 Powerhouse Rd. 941 Comment
  UCD77175  Brodiaea californica Robert E. Preston 2002-6-22 1887 Shasta Ca. 0.5 mi S of Montgomery Creek, along Hwy 299. 663 Comment
  UCD77494  Zeltnera venusta Robert E. Preston 2005-7-9 2364 Shasta 5.5 mi W of Shingletown, along Black Butte Rd, ca. 0.2 mi S of Hwy 44. 601 Comment
  UCD77632  Epilobium pallidum Robert E. Preston 2003-5-31 2154 Shasta Ca. 9 miles ESE of Redding, along Millville Plains Road, ca. 0.65 mile N of Dersch Road. 146 Comment
  UCD77633  Epilobium pallidum Robert E. Preston 2005-7-9 2363 Shasta 5.5 miles W of Shingletown, along Black Butte Road, ca. 0.2 mile S of Highway 44. 601 Comment
  UCD77699  Eryngium articulatum Robert E. Preston 2002-6-22 1888 Shasta Ca. 14 mi NE of Redding, 0.8 mi E of Woodman Hill, along Hwy 299. 316 Comment
  UCD77707  Eryngium articulatum Robert E. Preston 2005-7-9 2365 Shasta Ca. 10 mi E of Anderson, along Ash Creek Rd 247 Comment
  UCD77826  Limnanthes douglasii subsp. striata Robert E. Preston 2004-5-8 2237 Shasta Ca. 3 mi N of Redding, along Twinview Blvd, 0.25 mi N of Oasis Rd 196 Comment
  UCD78043  Trichostema simulatum Robert E. Preston 2003-6-14 2160 Shasta 3.4 mi W of Fall River Mills, along Pit No. 1 Powerhouse Rd. 941 Comment
  UCD80869  Trifolium campestre Robert E. Preston 2007-5-11 2494 Shasta Redding, along Airport Rd, ca. 0.5 mile S of Rancho Rd. 155 Comment
  UCD80872  Heliotropium europaeum Robert E. Preston 2006-10-27 2416 Shasta 1.3 mi E of Palo Cedro, along Hwy 44. 145 Comment
  UCD84711  Penstemon heterodoxus var. shastensis Robert E. Preston 2009-7-7 2696 Shasta Ca. 10 mi SSW of Burney, at S end of The Gardens. 1490 Comment
  UCD84713  Phacelia racemosa Robert E. Preston 2009-7-7 2698 Shasta Ca. 10 mi SSW of Burney, at S end of The Gardens. 1482 Comment
  UCD84714  Vaccinium uliginosum subsp. occidentale Robert E. Preston 2009-7-7 2699 Shasta Ca. 10 mi SSW of Burney, at S end of The Gardens. 1484 Comment
  UCD84715  Vaccinium membranaceum Robert E. Preston 2009-7-7 2700 Shasta Ca. 10 mi SSW of Burney, at S end of The Gardens. 1484 Comment
  UCD84716  Polygonum parryi Robert E. Preston 2009-7-8 2702 Shasta Ca. 9.8 mi SSW of Burney, at The Gardens. 1481 Comment
  UCD84717  Eryngium alismifolium Robert E. Preston 2009-7-8 2703 Shasta Ca. 9.8 mi SSW of Burney, at The Gardens. 1479 Comment
  UCD84718  Eryngium articulatum Robert E. Preston 2009-7-8 2704 Shasta Ca. 9.8 mi SSW of Burney, at The Gardens. 1479 Comment
  UCD77201  Brodiaea minor Robert E. Preston 2003-5-31 2154 b Shasta Redding, along Airport Rd, ca. 0.5 mi N of Redding Municipal Airport. Comment
  CHSC33171  Lepidium campestre R. E. Preston 1981-5-2 54 Siskiyou At Camp Creek Recreation Area, on Irongate Reservoir, ca. 32 km ne of Yreka. 700 Comment
  CHSC33172  Boechera pauciflora R. E. Preston 1981-5-2 55 Siskiyou On s side of Irongate Reservoir, ca. 200 m n of Sentinel Rocks; ca. 32 km ne of Yreka. 717 Comment
  CHSC33173  Descurainia pinnata subsp. halictorum R. E. Preston 1981-5-2 57 Siskiyou S side of Irongate Reservoir, ca. 32 km ne of Yreka. 732 Comment
  CHSC33175  Descurainia sophia R. E. Preston 1981-5-2 62 Siskiyou On roadside cut, ca. 50 m n of Camp Creek, at Irongate Reservoir, ca. 32 km ne of Yreka. 700 Comment
  CHSC33176  Alyssum alyssoides R. E. Preston 1981-5-2 63 Siskiyou In field, ca. 150 m s of Irongate Reservoir a Camp Creek Recreation Area; ca. 32 km ne of Yreka. 700 Comment
  CHSC33222  Barbarea orthoceras R. E. Preston 1981-5-2 58 Siskiyou On banks of Camp Creek where it enters Irongate Reservoir; ca. 32 km ne of Yreka. 700 Comment
  CHSC33835  Rorippa curvisiliqua var. occidentalis R. E. Preston 1981-5-2 59 Siskiyou On bank of Camp Creek at confluence with Irongate Reservoir; ca. 32 km ne of Yreka. 702 Comment
  CHSC35626  Juncus ensifolius R. E. Preston 1981-8-22 140 Siskiyou N shore of Juanita Lake. 1555 Comment
  CHSC35673  Balsamorhiza deltoidea R. E. Preston 1982-5-1 275 Siskiyou Above Irongate Reservoir, ca. 1/2 mi SE of Camp Creek Recreation Area, ca. 20 mi NE of Yreka. 716 Comment
  CHSC38086  Alyssum alyssoides R. E. Preston; L. E. Preston 1983-6-9 391 Siskiyou Grass Lake Rest Area. 1542 Comment
  CHSC38087  Boechera pinetorum R. E. Preston; L. E. Preston 1983-6-9 390 Siskiyou Grass Lake Rest Area. 1542 Comment
  CHSC38094  Lepidium draba R. E. Preston 1983-7-17 400 Siskiyou At side of Hiram Page Road, across from grave marker, Yreka. 829 Comment
  JEPS110479  Pinus albicaulis Robert E. Preston 2001-6-23 1519 a Siskiyou Klamath National Forest, E peak of Rainbow Mountain. 2118 Comment
Read comments Jun 3 2018
  JEPS110482  Eriogonum umbellatum var. modocense Robert E. Preston 2001-7-21 1708 Siskiyou Klamath National Forest, N slope of Rainbow Mountain. 2026 Comment
  JEPS110491  Eryngium alismifolium Robert E. Preston 2005-7-1 2358 Siskiyou 3.3 mi E of Granada, along County Rd A12. 787 Comment
  JEPS117731  Carex hystericina Robert E. Preston 2008-5-15 2633 Siskiyou ca. 2 mi N of, along Hwy 96 Somes Bar; Davis Creek 228 Comment
  UCD110546  Hesperolinon micranthum Robert E. Preston 1995-6-22 895 Siskiyou Irongate Reservoir, on open slopes w of Mirror Cove. 731 Comment
  UCD116311  Streptanthus tortuosus Robert E. Preston 1984-7-25 492 Siskiyou on summit slopes of Little Mt. Hoffman. 2196 Comment
  UCD116312  Streptanthus tortuosus Robert E. Preston 1984-7-26 496 Siskiyou Mt. Shasta Ski Bowl. 2316 Comment
  UCD120681  Phacelia ramosissima Robert E. Preston 1995-6-22 896 Siskiyou Irongate Reservoir, on open slopes W of Mirror Cove. 731 Comment
  UCD125688  Scutellaria siphocampyloides Robert E. Preston 1995-6-22 897 Siskiyou Irongate Reservoir, on open slopes W of Mirror Cove. 731 Comment
  UCD128610  Agoseris heterophylla Robert E. Preston 2002-6-20 1850 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope. 1968 Comment
  UCD133894  Solidago multiradiata Robert E. Preston 2001-8-26 1765 a Siskiyou Klamath National Forest, north slope of Rainbow Mountain, Hemlock Lake. 1889 Comment
  UCD134144  Abies concolor Robert E. Preston 2002-7-12 1912 a Siskiyou Klamath National Forest, S slope of Rainbow Mountain. 1893 Comment
  UCD134256  Abies magnifica var. shastensis Robert E. Preston 2001-6-30 1649 e Siskiyou Klamath National Forest, Rainbow Mountain, north slope of east lobe. 1920 Comment
  UCD134636  Pinus lambertiana Robert E. Preston 2002-7-12 1914 Siskiyou Klamath National Forest, S slope of Rainbow Mountain. 1950 Comment
  UCD140533  Carex luzulina Robert E. Preston 2001-6-30 1655 Siskiyou Klamath National Forest, Hemlock Lake. 1889 Comment
  UCD166858  Trifolium arvense Robert E. Preston 2016-7-7 3060 Siskiyou 4.2 mi NE of Forks of Salmon, along Sawyers Bar Rd, near mouth of Big Creek. 478 Comment
  UCD166859  Streptanthus tortuosus var. oblongus Robert E. Preston 2016-7-7 3059 Siskiyou 4.1 mi W of Forks of Salmon, along Salmon River Rd, opposite Bloomer Mine. 345 Comment
  UCD48378  Navarretia divaricata Robert F. Preston 2002-6-20 1831 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope. 1911 Comment
  UCD48626  Navarretia pubescens Robert E. Preston 1995-6-18 879 Siskiyou CA: Siskiyou Co.; ca. 3 mi ese of Hornbrook, in oak woodland adjacent to Ager Rd; (Copco 15' quad). 701 Comment
  UCD49862  Eleocharis suksdorfiana Robert E. Preston 2001-7-21 1748 Siskiyou Klamath National Forest, north slope of Rainbow Mountain. 2066 Comment
  UCD50622  Achnatherum lemmonii Robert E. Preston 2002-6-20 1829 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope. 1911 Comment
  UCD50794  Achnatherum nelsonii subsp. dorei Robert E. Preston 2001-6-23 1621 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn. 1706 Comment
  UCD52742  Podagrostis humilis Robert E. Preston 2001-7-20 1683 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, N. of Hemlock Lake. 1712 Comment
  UCD52771  Agrostis idahoensis Robert E. Preston 2002-7-12 1901 Siskiyou Klamath National Forest, S slope of Rainbow Mountain, N of Trout Creek. 1652 Comment
  UCD52850  Arctostaphylos nevadensis Robert E. Preston 2001-6-23 1560 Siskiyou Klamath National Forest; north slope of Rainbow Mtn. 1767 Comment
  UCD53370  Agrostis scabra Robert E. Preston 2001-8-26 1763 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, Hemlock Lake. 1883 Comment
  UCD53417  Arctostaphylos patula Robert E. Preston 2001-6-23 1564 Siskiyou Klamath National Forest; north slope of Rainbow Mtn. at Hemlock Lake. 1889 Comment
  UCD55035  Downingia bacigalupii Robert E. Preston 2002-6-22 1885 Siskiyou Ca. 0.6 miles SW of Cayton, on W side of Hwy 89. 958 Comment
  UCD58952  Bromus laevipes Robert E. Preston 2001-6-23 1620 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest. N-facing slope of Rainbow Mtn. 1706 Comment
  UCD59689  Cinna latifolia Robert E. Preston 2001-7-20 1690 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, north of Hemlock Lake. 1731 Comment
  UCD59740  Bromus suksdorfii Robert E. Preston 2001-7-21 1742 Siskiyou Klamath National Forest, Rainbow Mountain. 2255 Comment
  UCD61322  Danthonia unispicata Robert E. Preston 2002-6-20 1830 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge. 1911 Comment
  UCD61650  Elymus elymoides subsp. californicus Robert E. Preston 2001-6-23 1624 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn. 1706 Comment
  UCD62333  Elymus glaucus subsp. glaucus Robert E. Preston 2001-6-30 1660 Siskiyou Klamath National Forest, Hemlock Lake. 1889 Comment
  UCD63526  Deschampsia elongata Robert E. Preston 2002-7-14 1926 a Siskiyou Klamath National Forest, N slope of Rainbow Mountain. 1754 Comment
  UCD66987  Campanula scabrella Robert E. Preston 2001-7-21 1743 Siskiyou Klamath National Forest, Rainbow Mountain. 2255 Comment
  UCD77173  Brodiaea coronaria Robert E. Preston 2002-6-22 1882 Siskiyou Ca. 0.6 miles SW of Cayton, on W side of Hwy 89. 958 Comment
  UCD77222  Phacelia heterophylla subsp. virgata Robert E. Preston 2001-6-23 1625 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn. 1706 Comment
  UCD77226  Stachys rigida subsp. rivularis Robert E. Preston 2002-7-12 1902 Siskiyou Klamath National Forest, S slope of Rainbow Mountain, N of Trout Creek 1652 Comment
  UCD77228  Ranunculus populago Robert E. Preston 2001-6-30 1633 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W se 1/4 of nw 1/4 Section 14 1694 Comment
  UCD77229  Ranunculus occidentalis Robert E. Preston 2001-6-30 1631 Siskiyou Klamath National Forest, north slope of Rainbow Mountain. 1694 Comment
  UCD77233  Galium triflorum Robert E. Preston 2001-6-30 1635 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W se 1/4 of nw 1/4 Section 14 1694 Comment
  UCD77234  Galium bifolium Robert E. Preston 2001-6-30 1644 Siskiyou Klamath National Forest, north slope of Rainbow Mountain. 1722 Comment
  UCD77247  Achillea millefolium Robert E. Preston 2001-6-23 1618 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn. 1706 Comment
  UCD77251  Leptosiphon ciliatus Robert E. Preston 2002-6-20 1848 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope 1968 Comment
  UCD77261  Mimulus nanus var. jepsonii Robert E. Preston 2002-6-21 1873 Siskiyou Klamath National Forest, Rainbow Mountain, S slope, N of Trout Creek 1709 Comment
  UCD77262  Mimulus guttatus Robert E. Preston 2001-6-30 1637 Siskiyou Klamath National Forest, north slope of Rainbow Mountain. 1694 Comment
  UCD77263  Acer glabrum var. glabrum Robert E. Preston 2001-6-23 1613 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W se 1/4 Section 15 1889 Comment
  UCD77266  Juncus balticus subsp. ater Robert E. Preston 2002-7-12 1904 Siskiyou Klamath National Forest, S slope of Rainbow Mountain, N of Trout Creek 1652 Comment
  UCD77267  Juncus drummondii Robert E. Preston 2001-6-23 1555 Siskiyou Klamath National Forest, n slope of Rainbow Mtn. 1767 Comment
  UCD77268  Juncus nevadensis Robert E. Preston 2002-7-12 1905 Siskiyou Klamath National Forest, S slope of Rainbow Mountain, N of Trout Creek. 1652 Comment
  UCD77270  Juncus howellii Robert E. Preston 2002-6-21 1872 Siskiyou Klamath National Forest, Rainbow Mountain, S slope, N of Trout Creek 1691 Comment
  UCD77290  Plagiobothrys hispidulus Robert E. Preston 2002-6-20 1847 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope 1968 Comment
  UCD77294  Cornus sericea subsp. sericea Robert E. Preston 2001-6-30 1661 Siskiyou Klamath National Forest, Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD77297  Sidalcea oregana subsp. spicata Robert E. Preston 2003-7-28 2163 Siskiyou ca. 17.3 mi NE of McCloud, at Trout Creek Campground 1486 Comment
  UCD77302  Aconitum columbianum Robert E. Preston 2001-7-20 1682 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake, T42N R1W se 1/4 of ne 1/4 Section 14 1712 Comment
  UCD77303  Actaea rubra Robert E. Preston 2001-7-20 1692 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake, T42N R1W se 1/4 of ne 1/4 Section 14 1743 Comment
  UCD77307  Agoseris aurantiaca var. aurantiaca Robert E. Preston 2002-7-12 1906 Siskiyou Klamath National Forest, S slope of Rainbow Mountain, N of Trout Creek. 1712 Comment
  UCD77310  Allium campanulatum Robert E. Preston 2002-6-20 1835 Siskiyou Klamath National Forest, Rainbow Mountain, 1911 Comment
  UCD77315  Allium validum Robert E. Preston 2001-8-26 1758 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake. 1877 Comment
  UCD77319  Alnus incana subsp. tenuifolia Robert E. Preston 2002-6-20 1863 Siskiyou Klamath National Forest, Rainbow Mountain, north slope 1910 Comment
  UCD77329  Amelanchier utahensis Robert E. Preston 2001-6-23 1569 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, N slope of Rainbow Mountain at Hemlock Lake. 1889 Comment
  UCD77335  Anemone drummondii var. drummondii Robert E. Preston 2002-6-20 1858 Siskiyou Klamath National Forest, Rainbow Mountain 2255 Comment
  UCD77336  Anemone lyallii Robert E. Preston 2001-6-30 1638 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W se 1/4 of nw 1/4 Section 14 1694 Comment
  UCD77338  Antennaria howellii subsp. howellii Robert E. Preston 2002-7-14 1930 Siskiyou Klamath National Forest, N slope of Rainbow Mountain 1850 Comment
  UCD77340  Antennaria rosea Robert E. Preston 2001-6-23 1598 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W nw 1/4 of nw 1/4 Section 23 2011 Comment
  UCD77342  Apocynum androsaemifolium Robert E. Preston 2001-8-26 1765 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, Hemlock Lake. 1883 Comment
  UCD77343  Aquilegia formosa Robert E. Preston 2001-6-23 1601 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W nw 1/4 of nw 1/4 Section 23 2011 Comment
  UCD77344  Boechera lyallii Robert E. Preston 2002-7-14 1933 Siskiyou Klamath National Forest, N slope of Rainbow Mountain. 1981 Comment
  UCD77347  Boechera paupercula Robert E. Preston 2001-7-21 1730 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W ne 1/4 Section 22 2072 Comment
  UCD77349  Boechera retrofracta Robert E. Preston 2002-7-14 1940 Siskiyou Klamath National Forest, N slope of Rainbow Mountain. 1716 Comment
  UCD77351  Boechera platysperma Robert E. Preston 2001-6-23 1563 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD77352  Turritis glabra Robert E. Preston 2001-7-20 1698 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, north slope of Rainbow Mountain, N of Hemlock Lake. 1676 Comment
  UCD77356  Arnica discoidea Robert E. Preston 2002-6-19 1822 Siskiyou Dunsmuir, in forest along E bank of Sacramento River. 727 Comment
  UCD77358  Arnica mollis Robert E. Preston 2001-7-20 1693 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake, T42N R1W ne 1/4 of se 1/4 Section 14 1755 Comment
  UCD77360  Artemisia douglasiana Robert E. Preston 2003-7-29 2169 Siskiyou S slope of Rainbow Mountain 1977 Comment
  UCD77361  Artemisia tridentata subsp. vaseyana Robert E. Preston 2001-8-26 1771 Siskiyou Klamath National Forest, N slope of Rainbow Mountain. 2103 Comment
  UCD77362  Asclepias cordifolia Robert E. Preston 2002-6-21 1879 Siskiyou Klamath National Forest, Rainbow Mountain, S slope. 1819 Comment
  UCD77363  Eucephalus ledophyllus Robert E. Preston 2001-7-21 1705 Siskiyou Klamath National Forest, north slope of Rainbow Mountain. 1920 Comment
Read comments Nov 7 2014
  UCD77420  Barbarea orthoceras Robert E. Preston 2001-6-30 1642 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W se 1/4 of nw 1/4 Section 14 1722 Comment
  UCD77426  Brickellia grandiflora Robert E. Preston 2001-7-21 1711 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, 2026 Comment
  UCD77435  Calyptridium umbellatum Robert E. Preston 2001-6-23 1561 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, T42N R1W ne 1/4 of se 1/4 Section 14 1828 Comment
  UCD77436  Calyptridium monospermum Robert E. Preston 2003-7-29 2165 Siskiyou S slope of Rainbow Mountain. 1787 Comment
  UCD77458  Carex fracta Robert E. Preston 2002-7-13 1923 Siskiyou Klamath National Forest, Trout Creek Meadow. 1505 Comment
  UCD77461  Carex multicaulis Robert E. Preston 2001-6-23 1547 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, T42N R1W ne 1/4 of se 1/4 Section 14 1828 Comment
  UCD77462  Carex aurea Robert E. Preston 2002-7-12 1915 Siskiyou Klamath National Forest, S slope of Rainbow Mountain 1968 Comment
  UCD77463  Carex inops subsp. inops Robert E. Preston 1999-7-16 1226 Siskiyou McCloud River, at Fowler's Campground and along trail to Middle Falls. 999 Comment
  UCD77466  Carex vulpinoidea Robert E. Preston 2000-6-25 1381 Siskiyou On n shore of Irongate Reservoir, 0.1 mi downstream of confluence of Klamath River and Fall Creek, T48N R5W sw 1.4 of ne 1/4 Section 36 216 Comment
  UCD77467  Carex whitneyi Robert E. Preston 1996-7-22 971 Siskiyou between Blanche Lake and Bullseye Lake 2072 Comment
  UCD77468  Carex fracta Robert E. Preston 2003-7-29 2167 Siskiyou Rainbow Mountain 1785 Comment
  UCD77470  Carex raynoldsii Robert E. Preston 2002-6-21 1868 Siskiyou Klamath National Forest, Rainbow Mountain, S slope, N of Trout Creek 1659 Comment
  UCD77473  Carex rossii Robert E. Preston 2001-6-23 1548 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, T42N R1W ne 1/4 of se 1/4 Section 14 1828 Comment
  UCD77474  Carex heteroneura Robert E. Preston 2001-6-30 1667 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake. 1853 Comment
  UCD77475  Carex jonesii Robert E. Preston 2001-7-21 1726 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W ne 1/4 Section 22 2066 Comment
  UCD77477  Carex angustata Robert E. Preston 2001-6-30 1665 Siskiyou Klamath National Forest, Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD77478  Carex vesicaria Robert E. Preston 2001-6-30 1657 Siskiyou Klamath National Forest, Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD77479  Carex athrostachya Robert E. Preston 2001-6-30 1656 Siskiyou Klamath National Forest, Hemlock Lake. 1889 Comment
  UCD77480  Carex breweri Robert E. Preston 2001-6-23 1593 a Siskiyou Klamath National Forest, e ridge of Rainbow Mtn, T42N R1W se 1/4 of nw 1/4 Section 23 2072 Comment
  UCD77481  Carex multicostata Robert E. Preston 2001-7-21 1717 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W ne 1/4 Section 22 2042 Comment
  UCD77489  Castilleja miniata Robert E. Preston 2002-7-12 1903 Siskiyou Klamath National Forest, N of Trout Creek 1652 Comment
  UCD77491  Ceanothus prostratus Robert E. Preston 2001-7-21 1737 Siskiyou Klamath National Forest, Rainbow Mountain, T42N R1W se 1/4 of ne 1/4 Section 22 2194 Comment
  UCD77492  Ceanothus velutinus Robert E. Preston 2001-6-23 1592 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, T42N R1W nw 1/4 of ne 1/4 Section 23 2042 Comment
  UCD77517  Chamaesaracha nana Robert E. Preston 2002-6-20 1823 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope. 1888 Comment
  UCD77519  Euphorbia glyptosperma Robert E. Preston 2003-7-30 2172 Siskiyou Ca. 17.3 mi NE of McCloud, at Trout Creek Campground. 1486 Comment
  UCD77531  Chimaphila menziesii Robert E. Preston 2001-6-23 1550 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, T42N R1W ne 1/4 of se 1/4 Section 14 1828 Comment
  UCD77546  Ericameria nauseosa var. speciosa Robert E. Preston 2001-8-26 1770 Siskiyou Klamath National Forest, N slope of Rainbow Mountain. 2103 Comment
  UCD77549  Circaea alpina subsp. pacifica Robert E. Preston 2001-6-23 1544 Siskiyou Klamath National Forest, N slope of Rainbow Mtn. 1706 Comment
  UCD77564  Collomia tinctoria Robert E. Preston 2001-7-21 1733 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, Rainbow Mountain. 2158 Comment
  UCD77567  Corallorhiza maculata Robert E. Preston 2001-6-23 1549 Siskiyou Klamath National Forest, n slope of Rainbow Mtn. 1828 Comment
  UCD77571  Crepis occidentalis Robert E. Preston 2002-6-20 1840 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope 1946 Comment
  UCD77572  Crepis pleurocarpa Robert E. Preston 2002-7-12 1913 Siskiyou Klamath National Forest, Rainbow Mountain. 1913 Comment
  UCD77578  Cryptantha affinis Robert E. Preston 2002-6-20 1825 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope 1911 Comment
  UCD77583  Cycladenia humilis Robert E. Preston 2002-7-12 1917 Siskiyou Klamath National Forest, S slope of Rainbow Mountain. 2072 Comment
  UCD77585  Cymopterus terebinthinus var. californicus Robert E. Preston 2002-6-20 1834 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope. 1911 Comment
  UCD77587  Cynoglossum officinale Robert E. Preston 2002-7-11 1898 Siskiyou Klamath National Forest, Trout Creek Meadow. 1505 Comment
  UCD77606  Dodecatheon alpinum Robert E. Preston 2001-6-23 1609 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W nw 1/4 of nw 1/4 Section 23 1965 Comment
  UCD77622  Epilobium ciliatum subsp. glandulosum Robert E. Preston 2001-7-20 1696 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, north slope of Rainbow Mountain, N of Hemlock Lake. 1755 Comment
  UCD77625  Epilobium clavatum Robert E. Preston 2001-7-21 1729 Siskiyou Klamath National Forest, north slope of Rainbow Mountain. 2066 Comment
  UCD77628  Epilobium anagallidifolium Robert E. Preston 2001-7-21 1722 Siskiyou Klamath National Forest, north slope of Rainbow Mountain. 2066 Comment
  UCD77629  Epilobium glaberrimum subsp. fastigiatum Robert E. Preston 2002-7-11 1896 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, Trout Creek Meadow 1505 Comment
  UCD77631  Chamerion angustifolium subsp. circumvagum Robert E. Preston 2002-7-14 1936 Siskiyou Klamath National Forest, N slope of Rainbow Mountain 1877 Comment
  UCD77638  Ericameria bloomeri Robert E. Preston 2001-8-26 1767 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, 2011 Comment
  UCD77639  Erigeron tener Robert E. Preston 2001-7-21 1715 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W ne 1/4 Section 22 2072 Comment
  UCD77641  Erigeron inornatus var. calidipetris Robert E. Preston 2001-7-21 1709 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W se 1/4 Section 15 2026 Comment
  UCD77642  Erigeron compositus Robert E. Preston 2001-7-21 1744 Siskiyou Klamath National Forest, Rainbow Mountain, 2255 Comment
  UCD77650  Eriogonum umbellatum var. polyanthum Robert E. Preston 2001-7-21 1708 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W se 1/4 Section 15 2026 Comment
  UCD77655  Eriogonum umbellatum var. modocense Robert E. Preston 2005-7-1 2359 Siskiyou 3.3 mi E of Granada, along County Rd A12 787 Comment
  UCD77665  Eriogonum marifolium Robert E. Preston 2002-7-12 1911 Siskiyou Klamath National Forest, S slope of Rainbow Mountain 1798 Comment
  UCD77681  Eriophyllum lanatum var. achilleoides Robert E. Preston 2002-7-14 1938 Siskiyou Klamath National Forest, N slope of Rainbow Mountain 1877 Comment
  UCD77728  Fragaria virginiana Robert E. Preston 2002-6-21 1865 Siskiyou Klamath National Forest, Rainbow Mountain, S slope, N of Trout Creek 1644 Comment
  UCD77732  Fritillaria atropurpurea Robert E. Preston 2002-6-20 1862 Siskiyou Klamath National Forest, Rainbow Mountain. 1910 Comment
  UCD77734  Gayophytum humile Robert E. Preston 2002-6-20 1832 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope 1911 Comment
  UCD77735  Gentiana calycosa Robert E. Preston 2002-7-14 1932 Siskiyou Klamath National Forest, N slope of Rainbow Mountain. 1895 Comment
  UCD77738  Navarretia capillaris Robert E. Preston 2002-7-12 1916 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, S slope of Rainbow Mountain 1968 Comment
  UCD77746  Hackelia californica Robert E. Preston 2001-6-23 1600 a Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W nw 1/4 of nw 1/4 Section 23 2011 Comment
  UCD77748  Hackelia micrantha Robert E. Preston 2001-6-23 1600 b Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W nw 1/4 of nw 1/4 Section 23 2011 Comment
  UCD77754  Hemizonella minima Robert E. Preston 2002-6-20 1846 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope 1968 Comment
  UCD77758  Heracleum lanatum Robert E. Preston 2002-6-21 1880 Siskiyou Klamath National Forest, Rainbow Mountain, S slope 1819 Comment
  UCD77767  Hesperolinon micranthum Robert E. Preston 2002-6-22 1884 Siskiyou Ca. 0.6 miles SW of Cayton, on W side of Hwy 89. 958 Comment
  UCD77769  Heuchera cylindrica Robert E. Preston 2001-6-30 1650 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W nw 1/4 of se 1/4 Section 14 1889 Comment
  UCD77772  Hieracium albiflorum Robert E. Preston 2001-7-20 1686 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake, 1712 Comment
  UCD77788  Kelloggia galioides Robert E. Preston 2001-6-23 1559 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, T42N R1W ne 1/4 of se 1/4 Section 14 1828 Comment
  UCD77802  Rhododendron columbianum Robert E. Preston 2002-7-13 1919 Siskiyou Klamath National Forest, Rainbow Lake 1828 Comment
  UCD77820  Linanthus pungens Robert E. Preston 2003-7-29 2171 Siskiyou Rainbow Mountain and Vicinity. Summit of Rainbow Mountain. 2323 Comment
  UCD77823  Lewisia triphylla Robert E. Preston 2001-7-21 1725 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W ne 1/4 Section 22 2066 Comment
  UCD77825  Lilium pardalinum subsp. shastense Robert E. Preston 2001-6-23 1541 Siskiyou Klamath National Forest, n slope of Rainbow Mtn. 1706 Comment
  UCD77828  Listera convallarioides Robert E. Preston 2001-6-30 1636 Siskiyou Klamath National Forest, north slope of Rainbow Mountain. 1694 Comment
  UCD77829  Lithophragma tenellum Robert E. Preston 2002-6-20 1845 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope 1965 Comment
  UCD77836  Acmispon americanus var. americanus Robert E. Preston 2002-7-14 1924 Siskiyou Klamath National Forest, N slope of Rainbow Mountain. 1716 Comment
  UCD77837  Hosackia oblongifolia Robert E. Preston 2002-7-11 1897 Siskiyou Klamath National Forest, Trout Creek Meadow 1505 Comment
  UCD77844  Lupinus angustiflorus Robert E. Preston 2001-6-23 1603 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W nw 1/4 of nw 1/4 Section 23 2011 Comment
  UCD77846  Luzula comosa Robert E. Preston 2001-6-23 1611 b Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W nw 1/4 of nw 1/4 Section 23 1965 Comment
  UCD77848  Luzula divaricata Robert E. Preston 2001-6-23 1593 b Siskiyou Klamath National Forest, e ridge of Rainbow Mtn, 2072 Comment
  UCD77852  Melica subulata Robert E. Preston 2001-6-30 1666 Siskiyou Klamath National Forest, Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD77853  Melica harfordii Robert E. Preston 2001-7-21 1718 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W ne 1/4 Section 22 2042 Comment
  UCD77854  Melica fugax Robert E. Preston 2002-6-20 1854 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge 2186 Comment
  UCD77855  Melica stricta Robert E. Preston 2001-6-30 1649 a Siskiyou Klamath National Forest, north slope of Rainbow Mountain, 1889 Comment
  UCD77864  Microseris nutans Robert E. Preston 2002-6-20 1838 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope. 1946 Comment
  UCD77869  Pectiantia pentandra Robert E. Preston 2001-6-23 1551 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, T42N R1W ne 1/4 of se 1/4 Section 14 1828 Comment
  UCD77872  Monardella odoratissima Robert E. Preston 2001-6-23 1567 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD77876  Monotropa hypopitys Robert E. Preston 2001-6-30 1645 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W nw 1/4 of se 1/4 Section 14 1767 Comment
  UCD77882  Nama densa Robert E. Preston 1997-6-1 1037 Siskiyou 100 ft n of Hwy 97. 1402 Comment
  UCD77891  Orobanche uniflora Robert E. Preston 2002-6-20 1849 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge. 1968 Comment
  UCD77894  Osmorhiza depauperata Robert E. Preston 2001-7-20 1684 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake, 1712 Comment
  UCD77896  Oxyria digyna Robert E. Preston 2002-7-14 1934 Siskiyou Klamath National Forest, N slope of Rainbow Mountain 1981 Comment
  UCD77904  Pedicularis semibarbata Robert E. Preston 2001-6-30 1668 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake. 1798 Comment
  UCD77906  Penstemon deustus var. pedicellatus Robert E. Preston 2002-6-20 1827 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope. 1911 Comment
  UCD77908  Penstemon speciosus Robert E. Preston 2002-7-12 1909 Siskiyou Klamath National Forest, S slope of Rainbow Mountain 1789 Comment
  UCD77912  Perideridia parishii subsp. latifolia Robert E. Preston 2001-8-26 1757 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1877 Comment
  UCD77914  Phlox diffusa Robert E. Preston 2002-6-20 1841 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope. 1946 Comment
  UCD77916  Phyllodoce empetriformis Robert E. Preston 2001-6-23 1578 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD77918  Platanthera dilatata var. leucostachys Robert E. Preston 2001-7-20 1694 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake. 1755 Comment
  UCD77925  Poa secunda subsp. secunda Robert E. Preston 2002-6-20 1828 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope 1911 Comment
  UCD77930  Polemonium pulcherrimum Robert E. Preston 2002-6-20 1856 Siskiyou Klamath National Forest, Rainbow Mountain. 2177 Comment
  UCD77931  Polemonium occidentale subsp. occidentale Robert E. Preston 2001-7-20 1697 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake, T42N R1W ne 1/4 of se 1/4 Section 14 1755 Comment
  UCD77932  Polyctenium fremontii Robert E. Preston 1997-6-1 1034 Siskiyou Grass Lake 1536 Comment
  UCD77938  Polygonum californicum Robert E. Preston 2002-6-22 1883 Siskiyou Ca. 0.6 miles SW of Cayton, on W side of Hwy 89. 958 Comment
  UCD77939  Polygonum shastense Robert E. Preston 2001-8-26 1766 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W ne 1/4 of ne 1/4 Section 23 1975 Comment
  UCD77948  Polygonum minimum Robert E. Preston 2001-7-21 1751 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W se 1/4 Section 15 1767 Comment
  UCD77951  Polygonum douglasii Robert E. Preston 2001-7-21 1752 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W se 1/4 Section 15 1767 Comment
  UCD77955  Bistorta bistortoides Robert E. Preston 2003-7-31 2176 Siskiyou Rainbow Mountain, at base of N slope, in upper Antelope Creek Meadow. 1661 Comment
  UCD77957  Populus trichocarpa Robert E. Preston 2002-6-21 1876 Siskiyou Klamath National Forest, Rainbow Mountain, S slope, N of Trout Creek 1765 Comment
  UCD77959  Phacelia scariosa Robert E. Preston 2001-6-23 1571 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD77960  Prunella vulgaris var. lanceolata Robert E. Preston 2001-7-20 1685 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake. 1712 Comment
  UCD77969  Purshia tridentata Robert E. Preston 2002-6-20 1839 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, Rainbow Mountain. 1946 Comment
  UCD77970  Pyrola minor Robert E. Preston 2001-7-20 1677 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake, T42N R1W se 1/4 of ne 1/4 Section 14 1688 Comment
  UCD77971  Pyrola picta Robert E. Preston 2001-7-20 1676 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake, T42N R1W se 1/4 of ne 1/4 Section 14 1688 Comment
  UCD77972  Pyrola dentata Robert E. Preston 2001-7-21 1704 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W se 1/4 Section 15 1920 Comment
  UCD77973  Raillardella argentea Robert E. Preston 2001-7-21 1714 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W ne 1/4 Section 22 2072 Comment
  UCD77975  Rorippa columbiae Robert E. Preston 2000-8-16 1434 Siskiyou Dry Lake, ca. 2.15 mi sw of Toad Mountain, T41N R2E sw 1/4 Section 18 1423 Comment
  UCD77976  Rosa gymnocarpa Robert E. Preston 2002-7-12 1912 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, S slope of Rainbow Mountain 1893 Comment
  UCD77978  Rubus leucodermis Robert E. Preston 2001-6-30 1659 Siskiyou Klamath National Forest, Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD77981  Rumex acetosella Robert E. Preston 2002-7-14 1925 Siskiyou Klamath National Forest, N slope of Rainbow Mountain 1739 Comment
  UCD77988  Sanicula graveolens Robert E. Preston 2001-7-21 1739 Siskiyou Klamath National Forest, Rainbow Mountain. 2255 Comment
  UCD77991  Scirpus microcarpus Robert E. Preston 2002-7-13 1921 Siskiyou Klamath National Forest, Trout Creek Meadow 1505 Comment
  UCD78001  Silene douglasii var. douglasii Robert E. Preston 2001-6-30 1651 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W nw 1/4 of se 1/4 Section 14 1889 Comment
  UCD78002  Silene menziesii Robert E. Preston 2002-7-11 1899 Siskiyou Klamath National Forest, Trout Creek Meadow 1505 Comment
  UCD78003  Maianthemum stellatum Robert E. Preston 2001-6-30 1664 Siskiyou Klamath National Forest, Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD78005  Solidago multiradiata Robert E. Preston 2001-6-23 1582 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake, 1889 Comment
  UCD78010  Spergularia rubra Robert E. Preston 2002-7-14 1929 Siskiyou Klamath National Forest, N slope of Rainbow Mountain 1806 Comment
  UCD78020  Stephanomeria lactucina Robert E. Preston 2001-8-26 1768 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, 2072 Comment
  UCD78029  Streptanthus tortuosus Robert E. Preston 2001-6-23 1612 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W se 1/4 Section 15 1889 Comment
  UCD78034  Symphoricarpos mollis Robert E. Preston 2001-6-23 1573 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake. 1889 Comment
  UCD78037  Thalictrum sparsiflorum Robert E. Preston 2001-7-20 1681 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake, T42N R1W se 1/4 of ne 1/4 Section 14 1712 Comment
  UCD78039  Tragopogon dubius Robert E. Preston 2002-7-12 1900 Siskiyou Klamath National Forest, Rainbow Mountain, S slope, N of Trout Creek 1644 Comment
  UCD78041  Trichostema simulatum Robert E. Preston 2002-6-22 1886 Siskiyou Ca. 0.6 miles SW of Cayton, on W side of Hwy 89 958 Comment
  UCD78047  Trifolium repens Robert E. Preston 2003-7-31 2177 Siskiyou Rainbow Mountain, at base of N slope, in upper Antelope Creek Meadow 1661 Comment
  UCD78065  Trillium ovatum var. oettingeri Robert E. Preston 2001-6-30 1670 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake. 1767 Comment
  UCD78066  Trisetum spicatum Robert E. Preston 2001-8-26 1769 Siskiyou Klamath National Forest, N slope of Rainbow Mountain. 2103 Comment
  UCD78067  Trisetum canescens Robert E. Preston 2001-8-26 1756 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1828 Comment
  UCD78068  Triteleia ixioides subsp. anilina Robert E. Preston 2002-6-21 1869 Siskiyou Klamath National Forest, Rainbow Mountain, S slope, N of Trout Creek 1691 Comment
  UCD78077  Veratrum californicum var. californicum Robert E. Preston 2002-7-14 1931 Siskiyou Klamath National Forest, N slope of Rainbow Mountain 1895 Comment
  UCD78079  Veronica wormskjoldii Robert E. Preston 2001-7-21 1719 Siskiyou Klamath National Forest, north slope of Rainbow Mountain. 2066 Comment
  UCD78083  Vicia americana Robert E. Preston 2002-6-21 1875 Siskiyou Klamath National Forest, Rainbow Mountain, S slope, N of Trout Creek 1749 Comment
  UCD78084  Viola pinetorum subsp. pinetorum Robert E. Preston 2002-6-21 1867 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, Rainbow Mountain, S slope, N of Trout Creek. 1659 Comment
  UCD78092  Hypericum anagalloides Robert E. Preston 2001-6-23 1576 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD78093  Ribes cereum var. cereum Robert E. Preston 2002-6-20 1855 Siskiyou Klamath National Forest, Rainbow Mountain 2162 Comment
  UCD78094  Ribes roezlii var. roezlii Robert E. Preston 2001-6-23 1570 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD78095  Ribes viscosissimum Robert E. Preston 2001-6-23 1622 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W ne 1/4 Section 15 1706 Comment
  UCD78097  Ribes lacustre Robert E. Preston 2001-6-23 1628 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W se 1/4 of ne 1/4 Section 15 1676 Comment
  UCD78114  Arceuthobium campylopodum Robert E. Preston 2003-7-31 2175 Siskiyou N slope of Rainbow Mountain 1706 Comment
  UCD78115  Athyrium alpestre var. americanum Robert E. Preston 2002-7-14 1935 Siskiyou Klamath National Forest, N slope of Rainbow Mountain 1981 Comment
  UCD78117  Pteridium aquilinum var. pubescens Robert E. Preston 2001-6-30 1662 Siskiyou Klamath National Forest, Hemlock Lake. 1889 Comment
  UCD78119  Polystichum imbricans Robert E. Preston 2001-6-23 1572 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD78120  Polystichum lemmonii Robert E. Preston 2001-6-30 1646 Siskiyou Klamath National Forest, north slope of Rainbow Mountain. 1828 Comment
  UCD78123  Cystopteris fragilis Robert E. Preston 2001-6-23 1584 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake. 1889 Comment
  UCD78124  Botrychium multifidum Robert E. Preston 2001-8-26 1762 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, n of Hemlock Lake. 1883 Comment
  UCD78125  Cryptogramma cascadensis Robert E. Preston 2001-6-23 1579 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake. 1889 Comment
  UCD78126  Cheilanthes gracillima Robert E. Preston 2001-6-23 1574 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD78127  Isoetes bolanderi Robert E. Preston 2002-7-13 1918 Siskiyou Klamath National Forest, Rainbow Lake 1828 Comment
  UCD78129  Chrysolepis sempervirens Robert E. Preston 2001-6-23 1565 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake, T42N R1W se 1/4 of se 1/4 Section 14 1889 Comment
  UCD78130  Aspidotis densa Robert E. Preston 2002-6-20 1844 Siskiyou Klamath National Forest, Rainbow Mountain, W ridge, on E-facing slope 1965 Comment
  UCD78178  Trifolium retusum Robert E. Preston 2008-5-13 2630 Siskiyou Along Hwy 96, ca. 11.6 miles N of the confl of the Klamath River and Salmon River 229 Comment
  UCD78179  Trifolium glomeratum Robert E. Preston 2008-5-13 2631 Siskiyou Along Hwy 96, ca. 11.6 miles N of the confl of the Klamath River and Salmon River. 229 Comment
  UCD78180  Cryptantha milobakeri Robert E. Preston 2008-5-14 2632 a Siskiyou Along Hwy 96, ca. 10.6 mi N of the confl of the Klamath River and Salmon River 262 Comment
  UCD78181  Medicago lupulina Robert E. Preston 2008-5-15 2632 b Siskiyou Ca. 3.25 mi N of Somes Bar, along Hwy 96 256 Comment
  UCD78182  Carex serratodens Robert E. Preston 2008-5-15 2634 Siskiyou Ca. 2 mi N of Somes Bar, along Hwy 96, at Davis Creek 229 Comment
  UCD78206  Cryptantha torreyana R. E. Preston 2006-7-3 2360 a Siskiyou Ca. 3.8 mi ESE of Hornbrook, in field along Ager Rd, 1.6 mi SE of its jct with Hornbrook-Copco Rd. 704 Comment
  UCD80885  Epilobium glaberrimum subsp. fastigiatum Robert E. Preston 2001-6-23 1556 Siskiyou Klamath National Forest, N slope of Rainbow Mtn. 1767 Comment
  UCD80889  Galium trifidum subsp. subbiflorum Robert E. Preston 2001-6-23 1583 Siskiyou Klamath National Forest, n slope of Rainbow Mtn, at Hemlock Lake. 1889 Comment
  UCD80890  Poa Robert E. Preston 2001-6-23 1557 Siskiyou Klamath National Forest, n slope of Rainbow Mtn. 1767 Comment
  UCD91776  Poa pringlei Robert E. Preston 2001-6-23 1597 Siskiyou Klamath National Forest, north facing slope of Rainbow Mountain. 2042 Comment
  UCD91994  Poa wheeleri Robert E. Preston 2001-6-23 1617 Siskiyou Klamath National Forest, north-facing slope of Rainbow Mountain. 1889 Comment
Read comments Nov 7 2014
  UCD93220  Torreyochloa pallida var. pauciflora Robert E. Preston 2003-7-28 2162 Siskiyou 17.3 miles NE of McCloud, at Trout Creek Campground. 1486 Comment
  UCD95474  Anemone drummondii var. drummondii Robert E. Preston 2001-8-26 1766 a Siskiyou Klamath National Forest, north slope of Rainbow Mountain. 1975 Comment
  UCD95823  Ranunculus alismifolius var. alismifolius Robert E. Preston 2001-6-23 1608 Siskiyou Klamath National Forest, north-facing slope of Rainbow Mountain. 1981 Comment
  UCR179175  Cymopterus terebinthinus var. californicus Robert E. Preston 2002-7-12 1908 Siskiyou Rainbow Mountain and Vicinity, Klamath National Forest, south slope of Rainbow Mtn. 1790 Comment
  UCR179177  Arctostaphylos nevadensis Robert E. Preston 2001-6-23 1560 Siskiyou Rainbow Mountain and Vicinity, Klamath National Forest, north slope of Rainbow Mtn. 1829 Comment
  UCR179178  Kelloggia galioides Robert E. Preston 2001-6-23 1559 Siskiyou Rainbow Mountain and Vicinity, Klamath National Forest, north slope of Rainbow Mtn. 1829 Comment
  UCR179187  Arabis holboellii var. retrofracta Robert E. Preston 2002-7-14 1940 Siskiyou Rainbow Mountain and Vicinity, Klamath National Forest, north slope of Rainbow Mtn. 1717 Comment
  SBBG115868  Horkelia fusca var. parviflora R. E. Preston 2001-7-21 1701 Siskiyou near S end of Antelope Crk Meadow 1633 Comment
  UCD100721  Eriogonum nudum var. pubiflorum Robert E. Preston 1995-6-18 886 Siskiyou Irongate Reservoir, 1/4 mile SW of mouth of Jenny Creek, on road cut. 731 Comment
  UCD104244  Acmispon nevadensis Robert E. Preston 1995-6-18 881 Siskiyou CA: Siskiyou Co.; ca. 3 mi ese of Hornbrook, adjacent to Ager Rd. 701 Comment
  UCD106497  Epilobium lactiflorum Robert E. Preston 2001-7-21 1722 a Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, N slope of Rainbow Mountain. 2066 Comment
  UCD107929  Trifolium eriocephalum subsp. eriocephalum Robert E. Preston 1995-6-18 873 Siskiyou Ca. 3 miles ESE of Hornbrook. Adjacent to Ager Road. 701 Comment
  UCD113492  Horkelia fusca var. parviflora Robert E. Preston 2001-7-21 1701 Siskiyou Klamath National Forest, near south end of Antelope Creek Meadow. 1633 Comment
  UCD114342  Boechera howellii Robert E. Preston 1984-7-26 495 Siskiyou Green Butte, on s slope of Mt. Shasta. Comment
  UCD114343  Boechera howellii Robert E. Preston 1996-7-23 980 Siskiyou 1 mi e of Medicine Lake. 2072 Comment
  UCD114359  Boechera breweri R. E. Preston 1982-5-1 277 Siskiyou 0.6 mi NW of where Camp Creek enters Irongate Reservoir. 853 Comment
  UCD114490  Boechera suffrutescens Robert E. Preston 1984-7-25 493 Siskiyou Arnica Sink. 2044 Comment
  UCD117223  Mentzelia dispersa Robert E. Preston 1995-6-18 887 Siskiyou Irongate Reservoir, 0.25 mile SW of mouth of Jenny Creek, on road cut. 731 Comment
  UCD118122  Collomia grandiflora Robert E. Preston 1995-6-18 875 Siskiyou Ca. 3 miles ESE of Hornbrook. Adjacent to Ager Road. 701 Comment
  UCD120480  Phacelia hastata Robert E. Preston 1995-6-18 885 Siskiyou Irongate Reservoir, ca. 1/4 mi sw of mouth of Jenny Creek. 731 Comment
  UCD120522  Phacelia heterophylla subsp. virgata Robert E. Preston 1995-6-18 882 Siskiyou ca. 3 mi ese of Hornbrook, adjacent to Ager Rd. 701 Comment
  UCD127272  Lomatium triternatum var. macrocarpum Robert E. Preston 1995-6-18 883 Siskiyou Irongate Reservoir, 0.6 miles NNW of dam at roadside. 731 Comment
  UCD127877  Perideridia oregana Robert E. Preston 1995-6-18 878 Siskiyou Ca. 3 miles ESE of Hornbrook. Adjacent to Ager Road. 701 Comment
  UCD129460  Blepharipappus scaber Robert E. Preston 1995-6-18 884 Siskiyou Irongate Reservoir, CA. 0.6 miles NNW of dam at roadside. 731 Comment
  UCD130929  Crepis capillaris Robert E. Preston 1995-6-18 880 Siskiyou ca. 3 miles east-southeast of Hornbrook, adjacent to Ager Road. 701 Comment
  UCD138438  Allium acuminatum Robert E. Preston 1995-6-18 879 Siskiyou ca. 3 mi ese of Hornbrook, in oak woodland adjacent to Ager Rd; (Copco 15' quad). 701 Comment
  UCD140532  Carex luzulina Robert E. Preston 1996-7-24 984 Siskiyou 2 miles SE of Medicine Lake, at Paynes Springs. 2011 Comment
  UCD77258  Mimulus primuloides Robert E. Preston 2001-7-20 1700 Siskiyou Klamath National Forest, Rainbow Mountain, N of Hemlock Lake. 1676 Comment
  UCD77304  Ageratina occidentalis Robert E. Preston 2001-8-26 1773 Siskiyou Klamath National Forest, Rainbow Mountain. 2072 Comment
  UCD77317  Allotropa virgata Robert E. Preston 2001-6-23 1586 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, N slope of Rainbow Mtn. 1920 Comment
  UCD77339  Antennaria dimorpha Robert E. Preston 2001-7-21 1738 Siskiyou Klamath National Forest, Rainbow Mountain, T42N R1W sw 1/4 of ne 1/4 Section 22 2225 Comment
  UCD77345  Boechera puberula Robert E. Preston 2001-7-21 1745 Siskiyou Klamath National Forest, Rainbow Mountain, T42N R1W sw 1/4 of ne 1/4 Section 22 2255 Comment
  UCD77513  Cerastium fontanum subsp. vulgare Robert E. Preston 2001-6-30 1632 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W se 1/4 of nw 1/4 Section 14 1694 Comment
  UCD77561  Collinsia torreyi var. wrightii Robert E. Preston 2001-6-23 1558 Siskiyou Klamath National Forest, Rainbow Mountain. 1828 Comment
  UCD77565  Collomia linearis Robert E. Preston 2001-6-30 1640 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, north slope of Rainbow Mountain. 1722 Comment
  UCD77582  Cycladenia humilis Robert E. Preston 2001-7-21 1746 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W sw 1/4 of ne 1/4 Section 22 2194 Comment
  UCD77586  Cymopterus terebinthinus var. californicus Robert E. Preston 2000-6-23 1380 Siskiyou East edge of Juniper Flat, north of Yellow Butte, along A12, 2.1 mi n of Hwy 97. 1100 Comment
  UCD77598  Delphinium nuttallianum Robert E. Preston 2001-6-23 1615 Siskiyou Klamath National Forest, n-facing slope of Rainbow Mtn, T42N R1W se 1/4 Section 15 1889 Comment
  UCD77627  Epilobium obcordatum Robert E. Preston 2001-7-21 1710 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, north slope of Rainbow Mountain. 2026 Comment
  UCD77630  Epilobium glaberrimum subsp. glaberrimum Robert E. Preston 2001-8-26 1764 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, north slope of Rainbow Mountain, Hemlock Lake. 1883 Comment
  UCD77675  Eriogonum hirtiflorum Robert E. Preston 2000-6-23 1380 a Siskiyou East edge of Juniper Flat, north of Yellow Butte, along A12, 2.1 mi n of Hwy 97, T43N R4W nw 1/4 of nw 1/4 Section 24 1100 Comment
  UCD77688  Eryngium alismifolium Robert E. Preston 2000-8-16 1433 Siskiyou Dry Lake, ca. 2.15 mi sw of Toad Mountain. 1423 Comment
  UCD77709  Eryngium alismifolium Robert E. Preston 2000-6-23 1379 Siskiyou Ca. 3.3 mi e of Grenada, on s side of A12, 0.5 mi w of Nelson Rd, 785 Comment
  UCD77771  Hieracium horridum Robert E. Preston 2001-8-26 1772 Siskiyou Klamath National Forest, Rainbow Mountain 2072 Comment
  UCD77781  Horkelia fusca subsp. parviflora Robert E. Preston 2001-7-21 1702 Siskiyou Klamath National Forest, near south end of Antelope Creek Meadow, T42N R1W ne 1/4 Section 12 1633 Comment
  UCD77792  Lapsana communis Robert E. Preston 2000-8-17 1435 Siskiyou McCloud River, along Pine Tree Hollow, ca. 0.5 mi s of Lower Falls, T39N R2W se 1/4 Section 12 975 Comment
  UCD77870  Ozomelis trifida Robert E. Preston 2001-6-23 1590 a Siskiyou Klamath National Forest, n slope of Rainbow Mtn, T42N R1W nw 1/4 of ne 1/4 Section 23 1950 Comment
  UCD77946  Aconogonon davisiae Robert E. Preston 2001-6-23 1594 Siskiyou Klamath National Forest, n-facing ridge of Rainbow Mtn, T42N R1W sw 1/4 of nw 1/4 Section 23 2103 Comment
  UCD78036  Taraxacum officinale Robert E. Preston 2001-6-30 1634 Siskiyou Klamath National Forest, north slope of Rainbow Mountain, T42N R1W se 1/4 of nw 1/4 Section 14 1694 Comment
  UCD78078  Veronica serpyllifolia subsp. humifusa Robert E. Preston 2001-6-23 1553 Siskiyou Klamath National Forest, n slope of Rainbow Mountain. 1767 Comment
  UCD78085  Viola macloskeyi Robert E. Preston 2001-6-23 1610 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, N-facing slope of Rainbow Mountain. 1965 Comment
  UCD78087  Viola glabella Robert E. Preston 2001-6-23 1552 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, N slope of Rainbow Mountain. 1767 Comment
  UCD80891  Epilobium glaberrimum subsp. fastigiatum Robert E. Preston 2001-6-23 1585 Siskiyou Klamath National Forest, N slope of Rainbow Mountain, at Hemlock Lake. 1889 Comment
  UCD80892  Epilobium hallianum Robert E. Preston 2001-7-21 1720 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, north slope of Rainbow Mountain. 2066 Comment
  UCD80893  Epilobium hallianum Robert E. Preston 2001-7-21 1721 Siskiyou Rainbow Mountain and Vicinity. Klamath National Forest, north slope of Rainbow Mtn. 2066 Comment
  JEPS106448  Centromadia parryi subsp. rudis Robert E. Preston 2002-9-20 1952 Solano Ca. 3 mi ESE of Denverton, along Goose Haven Rd, S of Lambie Rd. 21 Comment
  JEPS110485  Centromadia parryi subsp. parryi Robert E. Preston 2004-9-5 2298 Solano Montezuma Hills, ca. 2.6 mi NE of Bird's Landing, along Olsen Rd. 45 Comment
  JEPS110495  Plagiobothrys hystriculus Robert E. Preston 2006-5-10 2386 Solano 3.5 mi E of Travis Air Force Base, on Wilcox Ranch Preserve. 9 Comment
  JEPS110497  Plagiobothrys hystriculus Robert E. Preston 2006-5-13 2393 Solano Jepson Prairie Preserve, 1.4 mi SSW of int. Cook Lane and Hwy 113. 6 Comment
  JEPS110502  Plagiobothrys hystriculus Robert E. Preston 2005-5-24 2347 Solano Montezuma Hills. 50 Comment
  JEPS98238  Dittrichia graveolens R. E. Preston 2000-10-20 1448 Solano 4 mi e of Suisun City (along Hwy 12 between Branscombe Rd and Denverton Rd) 3 Comment
  JEPS99037  Lasthenia conjugens Robert E. Preston 1992-5-7 614 Solano in grassland SW of jct Scally Road and State Route 12, ca. 1.5 mi SW of Travis AFB 1 Comment
  JEPS99039  Atriplex cordulata Robert E. Preston 1994-8-10 678 Solano Calhoun Slough, ca. 100 ft E of Hwy 113. 9 Comment
  UCD115093  Planodes virginica Robert E. Preston 1994-3-2 645 Solano Campbell Ranch, 11 miles south of Dixon, on bank of tributary to Barker Slough. 6 Comment
  UCD115256  Lepidium dictyotum Robert E. Preston 1996-3-23 914 Solano Jepson Prairie, ca. 50 ft W of Hwy 113, 0.45 mi S of Barker Slough crossing. 3 Comment
  UCD120842  Plagiobothrys humistratus Robert E. Preston 1996-3-23 915 Solano Jepson Prairie, ca. 50 ft W of Hwy 113, 0.45 mi S of Barker Slough crossing. 3 Comment
  UCD130146  Centromadia parryi subsp. parryi Robert E. Preston 2005-11-18 2369 Solano around 3 miles northeast of Birds landing, 1 mile SSE of junction Olsen road and Highway 12. 48 Comment
  UCD133696  Lasthenia conjugens Robert E. Preston 1992-5-7 614 Solano southwest of junction Scally Road and State Route 12, around 1.5 mile southwest of Travis AFB. 1 Comment
  UCD148251  Centromadia pungens Robert E. Preston 2013-6-14 2913 Solano Along Goose Haven Rd, 0.25 mi S of Creed Rd. 8 Comment
  UCD148275  Eryngium articulatum Robert E. Preston 2013-8-24 2938 Solano ca. 1.5 mi S of Suisun City, on W side of Goat Island. 3 Comment
  UCD62677  Bromus caroli-henrici Robert E. Preston 2006-5-18 2398 Solano Montezuma Hills, 3 mi. NNE of Bird's Landing. 53 Comment
  UCD77133  Brodiaea terrestris Robert E. Preston 2005-5-5 2339 Solano Vacaville, along Leisure Rd, 1 mi N of jct with I-80. 28 Comment
  UCD77169  Brodiaea terrestris Robert E. Preston 2006-5-17 2396 Solano Montezuma Hills, ca. 4 mi NE of Bird's Landing. 32 Comment
  UCD77281  Plagiobothrys hystriculus Robert E. Preston 2006-5-10 2383 Solano 4.6 mi E of Travis Air Force Base, on Wilcox Ranch Preserve. 9 Comment
  UCD77285  Plagiobothrys greenei Robert E. Preston 2006-5-9 2382 Solano 0.9 mi WSW of Shiloh Church, at toe of N slope of Kirby Hill 2 Comment
  UCD77289  Plagiobothrys hystriculus Robert E. Preston 2006-5-10 2389 Solano 3 mi E of Travis Air Force Base, on Wilcox Ranch Preserve. 10 Comment
  UCD77293  Plagiobothrys greenei Robert E. Preston 2006-5-10 2392 Solano 4 mi E of Travis Air Force Base, on Wilcox Ranch Preserve. 9 Comment
  UCD77325  Amaranthus retroflexus Robert E. Preston 2004-9-5 2297 Solano Ca. 0.7 mi E of Dixon, along Pedrick Rd 12 Comment
  UCD77375  Atriplex argentea var. expansa Robert E. Preston 2000-10-20 1447 Solano Ca. 1.3 mi w of Suisun City, in field on s side of Cordelia Rd at its jct with Beck Ave 3 Comment
Read comments Oct 13 2012
  UCD77379  Atriplex cordulata Robert E. Preston 1998-6-30 1158 Solano ca. 50 ft W of Hwy 113, 0.5 mi S of Barker Slough 3 Comment
  UCD77385  Atriplex depressa Robert E. Preston 2002-8-21 1944 Solano Fairfield, ca. 1.3 mi SE of Cement Hill summit, in field on S side of Cement Hill Rd 15 Comment
  UCD77387  Atriplex cordulata Robert E. Preston 2001-9-12 1774 Solano Ca. 3 mi e of Denverton, along w side of Goose Haven Rd, 0.25 mi s of Lambie Rd, T4N R1E ne 1/4 of se 1/4 Section 3 24 Comment
  UCD77501  Centromadia parryi subsp. parryi Robert E. Preston 1999-9-26 1245 b Solano SE of Fairfield, in field along W side of Branscomb Rd, 0.4 mi S of Hwy 12. T4N R1W center E edge of Sec 3 3 Comment
  UCD77509  Centromadia pungens Robert E. Preston 1998-10-11 1186 Solano Ca. 1.5 mi S of Tremont, on NW corner of Bulkley Rd and Maxwell Rd. 10 Comment
  UCD77510  Centromadia pungens Robert E. Preston 1998-10-11 1185 Solano Ca. 1 mi ENE of Vacaville Junction, on E side of Elmira Rd, ca. 1/4 mi S of Cannon Rd. 27 Comment
  UCD77763  Hesperevax caulescens Robert E. Preston 2006-5-17 2397 Solano Montezuma Hills, 3.75 mi NNE of Bird's Landing 47 Comment
  UCD77764  Hesperevax sparsiflora var. sparsiflora Robert E. Preston 2006-5-17 2395 Solano Montezuma Hills, ca. 3 mi NNE of Bird's Landing 50 Comment
  UCD77785  Isocoma arguta Robert E. Preston 1999-9-26 1245 a Solano N side of Hay Road, 1 mi W of Hwy 113, at fenceline along right-of-way. 9 Comment
  UCD77911  Perideridia gairdneri Robert E. Preston 2002-8-21 1945 Solano Fairfield, 1.3 mi SE of Cement Hill summit, in field on S side of Cement Hill Rd. 15 Comment
  UCD78103  Dittrichia graveolens Robert E. Preston 1998-9-26 1167 Solano Benicia Industrial Park, along Bayshore Rd between Benicia Bridge and Industrial Park Rd 15 Comment
  UCD78111  Dittrichia graveolens Robert E. Preston 2000-10-20 1446 Solano Vacaville, along I-505 between I-80 and Vaca Valley Parkway 29 Comment
  UCD97339  Atriplex cordulata Robert E. Preston 1994-8-10 678 Solano Calhoun Slough, 100 feet east of Highway 113. 9 Comment
  UCD97341  Atriplex cordulata Robert E. Preston 1994-8-31 683 Solano Jepson Prairie, 0.5 mile south of Barker Slough, 100 feet west of Hwy 113. 3 Comment
  UCD97343  Atriplex cordulata Robert E. Preston 1994-8-31 684 Solano W side of Hwy 113, 420 feet south of Creed Rd. 6 Comment
  UCD97360  Atriplex coronata Robert E. Preston 1994-8-31 685 Solano on west side of Scally Road, 0.25 - 0.5 mile south of Hwy 12, SE of Fairfield. Comment
  UCD97478  Atriplex joaquinana Robert E. Preston 1994-8-31 686 Solano on west side of Scally Road, 0.25 mile south of Hwy 12, SE of Fairfield. 1 Comment
  UCD97823  Atriplex serenana Robert E. Preston 1994-9-15 688 Solano junction of Hwy 113 and Creed Road, 14.5 miles south of Dixon. 6 Comment
  UCD99026  Kochia scoparia subsp. scoparia Robert E. Preston 1994-9-15 689 Solano at roadside, junction of Hwy 113 and Creed Road, ca. 14.5 miles south of Dixon. 6 Comment
  UCD115239  Lepidium acutidens Robert E. Preston 1996-1 925 Solano in field E of Hwy 113, south of Robinson Road. 6 Comment
  UCD115240  Rapistrum rugosum Robert E. Preston 1992-5-14 612 Solano Vallejo River Park in Vallejo. 1 Comment
  UCD115257  Lepidium dictyotum Robert E. Preston 1996-4-4 923 Solano along fence line at W side of Hwy 113, south of Creed Road. 6 Comment
  UCD115763  Lepidium oxycarpum Robert E. Preston 1996-4-4 917 Solano ca. 1.8 mi SE of Fairfield, in field along W side of Scally Road. 1 Comment
  UCD120966  Plagiobothrys trachycarpus Robert E. Preston 1996-4-4 922 Solano Montezuma, in grassland E of old railroad grade. 1 Comment
  UCD124792  Limosella acaulis Robert E. Preston 1993-9-8 631 Solano ca. 1,300 feet east of Interstate 505, ca. 1.75 miles north of its junction with Interstate 80. 30 Comment
  UCD77495  Zeltnera trichantha Robert E. Preston 1999-7-2 1219 Solano In uplands along e side of Denverton Slough. 1 Comment
  UCD77500  Centromadia pungens Robert E. Preston 1999-9-26 1245 c Solano Lucol Hollow, ca. 2.5 mi E of Bird's Landing, T3N R1E NE 1/4 Sec 2 45 Comment
  UCD77700  Eryngium armatum Robert E. Preston 1999-7-2 1221 Solano In uplands along e side of Denverton Slough. 3 Comment
  UCD92970  Spartina densiflora Robert E. Preston 1999-7-2 1220 Solano along E side of Denverton Slope. 1 Comment
  UCD97362  Atriplex coronata Robert E. Preston 1994-9-5 687 Solano Montezuma. Comment
  UCD99230  Spergularia macrotheca var. leucantha Robert E. Preston 1996-4-4 926 Solano at west side of Hwy 113, south of Creed Road. Comment
  UCD106701  Lotus angustissimus Robert E. Preston 2000-8-2 1427 Sonoma Ca. 2.5 mi NNE of Fort Ross, Seaview. 381 Comment
  UCD147004  Trifolium incarnatum Robert E. Preston 2011-4-28 2849 Sonoma Sonoma, in vacant lot N of MacArthur St, between 4th St and Hayes St. 21 Comment
  UCD147005  Trifolium glomeratum Robert E. Preston 2011-4-28 2850 Sonoma Sonoma, in vacant lot N of MacArthur St, between 4th St and Hayes St. 21 Comment
  UCD147007  Ranunculus muricatus Robert E. Preston 2011-4-28 2852 Sonoma Sonoma, in vacant lot N of MacArthur St, between 4th St and Hayes St. 21 Comment
  UCD148240  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2013-3-29 2901 Sonoma 0.6 mi E of Occidental, at jct Occidental Rd and Facendini Lane. 262 Comment
  UCD163100  Brodiaea stellaris Robert E. Preston 2014-5-17 2963 Sonoma 4.5 mi NNW of Cazadero. 190 Comment
  UCD163101  Dichelostemma multiflorum Robert E. Preston 2014-5-17 2965 Sonoma 4.5 mi NNW of Cazadero. 190 Comment
  UCD163102  Chlorogalum pomeridianum var. minus Robert E. Preston 2014-5-17 2964 Sonoma 4.5 mi NNW of Cazadero. 190 Comment
  UCD166874  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2016-3-26 3042 Sonoma Mayacamas Mountains, along Pine Flat Road, at Rob Roy Flat. 618 Comment
  UCD166875  Dichelostemma capitatum Robert E. Preston 2016-3-26 3041 Sonoma Mayacamas Mountains, along Pine Flat Rd, 0.15 mi S of Red Hill summit. 660 Comment
  UCD77137  Brodiaea leptandra Robert E. Preston 2004-6-26 2264 Sonoma Ca. 2 mi NE of Santa Rosa, along St. Helena Rd 234 Comment
  UCD77159  Brodiaea terrestris Robert E. Preston 2005-6-11 2350 Sonoma Irish Hill, along Coleman Valley Rd, ca. 1 mi E of Hwy 1. 208 Comment
  UCD77454  Cardamine californica Robert E. Preston 2001-2-28 1497 Sonoma Ca. 2.5 mi NE of Fort Ross, near Seaview 381 Comment
  UCD77469  Carex rossii Robert E. Preston 1998-5-22 1104 Sonoma Myers Ranch, 2 mi NE of Occidental 152 Comment
  UCD77821  Lessingia nemaclada Robert E. Preston 1998-5-22 1105 Sonoma Myers Ranch, 2 mi NE of Occidental. 182 Comment
  UCD78035  Synthyris reniformis Robert E. Preston 2001-2-28 1496 Sonoma Ca. Sonoma County: 2.5 mi NE of Fort Ross, near Seaview. 381 Comment
  UCD78109  Dittrichia graveolens Robert E. Preston 1999-11-9 1252 Sonoma Windsor, on NW corner of jct Old Redwood Hwy and Arata Lane. T8N R9W N edge of Sec 11 39 Comment
  JEPS110481  Arctostaphylos stanfordiana Robert E. Preston 1996-4-22 928 Sonoma 5.7 mi SE of Hopland, on N ridge of Salt Canyon. 609 Comment
  UCD139635  Erythronium californicum R. E. Preston 1996-4-22 929 Sonoma 5.7 miles southeast of Hopland, on north ridge of Salt Canyon. 609 Comment
  UCD53860  Arctostaphylos stanfordiana R. E. Preston 1996-4-22 928 Sonoma 5.7 miles SE of Hopland; on north ridge of Salt Canyon. 609 Comment
  UCD90234  Pleuropogon californicus var. davyi R. E. Preston 1996-4-22 930 Sonoma ca. 4.3 miles E.S.E. of Hopland. Comment
  UCD116317  Streptanthus tortuosus Robert E. Preston 2001-5-2 1528 Stanislaus 1.5 mi ne of Knights Ferry, e side of canyon of the Stanislaus River. 152 Comment
  UCD163105  Dichelostemma capitatum subsp. lacuna-vernalis Robert E. Preston 2014-3-22 2945 Stanislaus 1.1 ni SE of Cooperstown (site). 95 Comment
  UCD163107  Dichelostemma capitatum subsp. lacuna-vernalis Robert E. Preston 2014-3-22 2946 Stanislaus 1.8 mi NW of Warnersville, along Williams Rd. 81 Comment
  UCD60787  Echinochloa colona Robert E. Preston 2004-8-26 2286 Stanislaus 3.7 mi SE of Ceres, along Pioneer Rd. 33 Comment
  UCD65693  Eriochloa acuminata Robert E. Preston 2004-8-26 2287 Stanislaus 2 mi SE of Ceres, at jct Service Rd and Faith Home Rd. 30 Comment
  UCD78024  Streptanthus glandulosus subsp. glandulosus Robert E. Preston 2003-5-28 2150 Stanislaus Del Puerto Canyon 413 Comment
  UCD84731  Solanum rostratum Robert E. Preston 2009-11-4 2720 Stanislaus Ca. 2.5 mi WSW of La Grange. 89 Comment
  UCD77686  Eryngium castrense Robert E. Preston 2000-7-31 1426 Stanislaus Ca. 1 mi e of Knights Ferry, along n side of Hwy 120, 0.5 mi e of Sonora Rd, 137 Comment
  UCD148272  Lindernia dubia Robert E. Preston 2013-7-29 2935 Sutter 2 mi NNW of Nicolas, ca. 0.1 mi N of Laurel Ave, on E side of levee. 13 Comment
  UCD163481  Eriochloa acuminata var. acuminata Robert E. Preston 2015-10-5 3034 Sutter 1.5 mi SSE of Wheatland, along W side of Placer Rd, 0.4 mi S of Bear River Drive. 26 Comment
  UCD163482  Juncus usitatus Robert E. Preston 2015-10-6 3035 Sutter 1.2 mi NE of East Nicolaus, along E side of Pacific Ave, 0.1 mi S of railroad crossing. 14 Comment
  UCD166867  Psilocarphus chilensis Robert E. Preston 2016-3-31 3048 Sutter 10.5 mi W of Yuba City, along SR 20, ca. 500 ft. E of the Sutter Bypass. 14 Comment
  UCD166877  Dichelostemma capitatum subsp. capitatum Robert E. Preston 2016-3-23 3039 Sutter 9.4 mi W of Yuba City, along N side of SR 20. 14 Comment
  UCD166878  Damasonium californicum Robert E. Preston 2016-3-23 3038 Sutter 9.1 mi W of Yuba City, along N side of SR 20. 14 Comment
  UCD166879  Alopecurus carolinianus Robert E. Preston 2016-3-23 3037 Sutter 8.8 mi W of Yuba City, along N side of SR 20. 14 Comment
  UCD77186  Brodiaea coronaria Robert E. Preston 2004-4-25 2220 Sutter Pleasant Grove, 0.5 mi W of jct Howsley and Pleasant Grove Rd. 13 Comment
Read comments Jun 17 2014
  UCD77555  Clarkia purpurea subsp. purpurea Robert E. Preston 2004-4-25 2219 Sutter 2 miles S of Pleasant Grove, at junction of Pleasant Grove Road and Keyes Road. 13 Comment
  CHSC33189  Lepidium strictum R. E. Preston 1981-4-13 94 Tehama Along sides of dirt road, Wurlitzer Ranch, ca. 11 mi n of Chico. 146 Comment
  CHSC34562  Boechera breweri R. E. Preston 1981-6-17 93 Tehama E side of ridge; ca. 2 km ne of Jonesville, Butte Co. 1385 Comment
  CHSC35637  Poa secunda subsp. secunda R. E. Preston 1982-4-4 221 Tehama Along jeep trail, ca. 3/4 mi s of Salt Creek Saddle on Round Valley Rd, ca. 4 mi w of Newville. 390 Comment
  CHSC35640  Poa bulbosa R. E. Preston 1982-4-6 224 Tehama At roadside; Salt Creek Saddle, ca. 5.5 mi w of Newville, Glenn county. 441 Comment
Read comments Jul 23 2009
  CHSC96042  Dittrichia graveolens Robert E. Preston 2006-10-27 2413 Tehama Corning, 0.3 mi S of Viola Ave, along I-5. 82 Comment
  UCD116012  Streptanthus glandulosus subsp. glandulosus Robert E. Preston 1986-4-25 536 Tehama 10 km SW of Paskenta, on Round Valley Road, 1 km E of Bennett Creek. 683 Comment
  UCD139107  Brodiaea californica Robert E. Preston 2003-5-31 2153 Tehama ca. 5.8 miles SE of Cottonwood, along Jellys Ferry Rd. 74 Comment
  UCD139125  Brodiaea elegans subsp. elegans Robert E. Preston 2004-5-8 2237 Tehama 6.1 miles SW of Cottonwood, along Jellys Ferry Rd. 115 Comment
  UCD147035  Boechera serpenticola Robert E. Preston 2012-6-18 2877 Tehama 7.6 mi SW of Paskenta, along Round Valley Rd, 0.1 mi E of Bennett Creek. 787 Comment
  UCD147037  Juncus xiphioides Robert E. Preston 2012-6-18 2879 Tehama 6.9 mi SW of Paskenta, along Round Valley Rd, 1.1 mi W of Salt Creek Saddle. 554 Comment
  UCD147858  Brodiaea coronaria Robert E. Preston 2005-5-7 2340 Tehama Along Meridian Rd, 0.6 mi S of Lassen Rd. 95 Comment
  UCD148226  Brodiaea coronaria Robert E. Preston 2007-5-11 2489 Tehama 8.6 mi NW of Corning, on W side of Paskenta Rd, 0.9 mi N of its int with Gyle Rd. 136 Comment
  UCD77144  Brodiaea minor Robert E. Preston 2003-5-18 2135 Tehama Ca. 4.45 mi WNW of Richfield, along Clark Rd 96 Comment
  UCD77148  Brodiaea coronaria Robert E. Preston 2003-5-18 2136 Tehama Ca. 4.45 mi WNW of Richfield, along Clark Rd 99 Comment
  UCD77150  Brodiaea coronaria Robert E. Preston 2003-5-31 2151 Tehama Ca. 9 mi NE of Red Bluff, on margins of Hog Lake 265 Comment
  UCD77151  Brodiaea coronaria Robert E. Preston 2003-5-18 2141 Tehama Ca. 2.9 mi ESE of Vina, on S side of Lassen Rd 64 Comment
  UCD77165  Brodiaea elegans subsp. elegans Robert E. Preston 2004-5-8 2233 Tehama 5 mi S of Corning, along Hwy 99W, 0.14 mi N of jct with Capay Rd 67 Comment
  UCD77191  Brodiaea californica Robert E. Preston 2004-4-30 2228 Tehama 0.7 mi N of Corning, along Hwy 99W. 85 Comment
  UCD77200  Brodiaea coronaria Robert E. Preston 2004-5-8 2232 Tehama 5 mi S of Corning, along Hwy 99W, 0.14 mi N of jct with Capay Rd. 67 Comment
  UCD77202  Brodiaea californica Robert E. Preston 2004-5-9 2239 Tehama Ca. 2.9 mi E of Corning, at jct Hoag Rd and Hall Rd. 68 Comment
  UCD77204  Brodiaea elegans subsp. elegans Robert E. Preston 2004-5-8 2234 Tehama 8.4 mi NW of Red Bluff, along Hwy 36. 171 Comment
  UCD77205  Brodiaea minor Robert E. Preston 2004-5-8 2235 Tehama 12.8 mi NW of Red Bluff, along Hwy 36, 0.1 mi N of its jct with Basler Rd. 265 Comment
  UCD77207  Brodiaea minor Robert E. Preston 2004-4-30 2229 Tehama Ca. 5.5 mi SW of Red Bluff, along Paskenta Rd, 0.25 mi N of Coyote Creek. 111 Comment
  UCD77209  Brodiaea californica Robert E. Preston 2004-4-30 2230 Tehama 7.5 mi ENE of Red Bluff, at W edge of Mud Springs Plain, along Hogback Rd. 274 Comment
  UCD77540  Chorizanthe polygonoides var. polygonoides Robert E. Preston 2003-5-18 2137 Tehama Ca. 9 mi NE of Red Bluff, on Hog Lake Plateau 268 Comment
  UCD77684  Eryngium castrense Robert E. Preston 2005-7-9 2362 Tehama Ca. 7 mi NE of Red Bluff, at Hog Lake. 264 Comment
  UCD77708  Eryngium castrense Robert E. Preston 2002-6-7 1813 Tehama 3 miles n of Dales, along Rd A6. 230 Comment
  UCD77753  Heliotropium europaeum Robert E. Preston 1997-5-29 1033 Tehama 1.25 mi sw of Coleman Fish Hatchery on Battle Creek. 137 Comment
  UCD77901  Paronychia ahartii Robert E. Preston 2003-5-18 2138 Tehama Ca. 9 mi NE of Red Bluff, on Hog Lake Plateau 268 Comment
  CAS-BOT-BC16044  Boechera breweri subsp. shastaensis Robert E. Preston 1986-4-25 534 Tehama Ca. 10.9 km southwest of Paskenta, on Round Valley Road, ca. 0.4 km east of Bennett Creek, at roadside. 793 Comment
  UCD114351  Boechera breweri subsp. shastaensis Robert E. Preston 1986-4-25 534 Tehama ca. 10.9 km sw of Paskenta, on Round Valley Rd, ca. 0.4 km e of Bennett Cr., at roadside. 793 Comment
  UCD114360  Boechera breweri Robert E. Preston 1986-4-25 535 Tehama ca. 10 km sw of Paskenta, on Round Valley Rd, ca. 1 km e of Bennett Cr. 702 Comment
  UCD115629  Thysanocarpus laciniatus Robert E. Preston 1986-4-25 537 Tehama Ca. 10 km W of Paskenta, along Round Valley Road, ca. 1 km E of Bennett Cr. 702 Comment
  UCD138007  Damasonium californicum Robert E. Preston 1997-5-29 1032 Tehama around 5 miles northeast of Red Bluff at Hog Lake. 263 Comment
  UCD77177  Brodiaea Robert E. Preston 2000-5-26 1351 Tehama Hog Lake. 265 Comment
  UCD77178  Brodiaea californica Robert E. Preston 2000-5-26 1350 Tehama Hog Lake. 265 Comment
  UCD77182  Brodiaea elegans subsp. elegans Robert E. Preston 2000-5-26 1349 Tehama Hog Lake. 265 Comment
  UCD105504  Plagiobothrys tenellus Robert E. Preston 2010-6-13 2811 Trinity S end of Grass Valley, along Lewiston Rd. 542 Comment
  UCD105547  Ceanothus arcuatus Robert E. Preston 2010-6-14 2813 Trinity 0.85 mi SSE of Scott Mtn summit on Hwy 3. 1548 Comment
  UCD105548  Silene salmonacea Robert E. Preston 2010-6-14 2812 Trinity 1.1 mi SW of Trinity Center, along both sides of Hwy 3. 856 Comment
  UCD114284  Barbarea orthoceras Robert E. Preston 1984-5-12 444 Trinity 5.3 km e of Junction City, in a wooded gully at base of roadfill on Hwy 299. 762 Comment
  UCD116290  Streptanthus tortuosus Robert E. Preston 1984-5-12 445 Trinity 0.8 km E of Burnt Ranch, at side of Highway 299. 534 Comment
  UCD116294  Streptanthus tortuosus Robert E. Preston 1984-5-13 447 Trinity 1 km north of Junction City, on east side of Canyon Creek Road. 457 Comment
  UCD116295  Streptanthus tortuosus Robert E. Preston 1984-5-13 448 Trinity 5.3 km east of Junction City, on north side of Highway 299. 762 Comment
  UCD116300  Streptanthus tortuosus Robert E. Preston 1984-5-19 451 Trinity 4.5 km west of Del Loma, Highway 299 at Schneider's Bar. 335 Comment
  UCD147040  Brodiaea rosea Robert E. Preston 2012-6-29 2883 Trinity 0.5 mi W of Stoney Creek Campground, 0.1 mi N of jct Hwy 3 and Stonewall Pass Rd. 762 Comment
  UCD78195  Ceanothus arcuatus Robert E. Preston 2008-7-19 2642 Trinity W slope of Mt. Eddy, along Pacific Coast Trail, 0.25 mi S of its jct with Forest Service Rd A17 2102 Comment
  UCD80874  Symphyotrichum bracteolatum Robert E. Preston 2007-9-7 2572 Trinity 0.2 mi W of Cedar Flat, along Hwy 299. 303 Comment
  UCD80876  Trifolium fragiferum Robert E. Preston 2007-9-7 2574 Trinity 0.5 mile W of Cedar Flat, along Highway 299. 334 Comment
  UCD84683  Crocidium multicaule Robert E. Preston 2009-3-5 2647 Trinity 3.5 mi W of Del Loma, 0.4 mi W of Schneider's Bar, along Hwy 299. 345 Comment
  UCD84687  Athysanus pusillus Robert E. Preston 2009-3-5 2649 Trinity 3.5 mi W of Del Loma, 0.4 mi W of Schneider's Bar, along Hwy 299. 345 Comment
  UCD84689  Crocidium multicaule Robert E. Preston 2009-3-5 2651 Trinity 1.8 mi W of Big Bar, at White's Bar, along Hwy 299. 381 Comment
  UCD84691  Cardamine nuttallii Robert E. Preston 2009-3-5 2652 Trinity 1.8 mi W of Big Bar, at White's Bar, along Hwy 299. 381 Comment
  UCD120743  Phacelia egena Robert E. Preston 1984-5-20 453 Trinity 5.3 km e of Junction City, N side of Hwy 299. 762 Comment
  UCD126409  Turritis glabra Robert E. Preston 1985-5-11 515 Trinity 5.3 km east of Junction City, on the north side of Highway 299. 760 Comment
  JEPS98257  Atriplex minuscula Robert E. Preston 1998-5-11 1103 Tulare 5.7 mi SE of Tulare Municipal Airport 93 Comment
  UCD105953  Leptosiphon liniflorus Robert E. Preston 2010-4-30 2779 Tulare 5.5 mi SE of Tulare, at Woodville Landfill Conservation Area. 95 Comment
  UCD105956  Atriplex covillei Robert E. Preston 2010-4-30 2781 Tulare 5.5 mi SE of Tulare, at Woodville Landfill Conservation Area. 95 Comment
  UCD115243  Lepidium acutidens Robert E. Preston 1998-3-25 1088 Tulare County landfill property, 5.7 mi E of Tulare Municipal Airport. 93 Comment
  UCD148249  Cuscuta brachycalyx Robert E. Preston 2013-4-23 2911 Tulare Ca. 5.5 mi SE of Tulare, at the Woodville Landfill Conservation Area (W side of Rd 152, 4.25 mi S of Hwy 37). 95 Comment
  UCD166854  Sesuvium verrucosum Robert E. Preston 2016-8-2 3064 Tulare 4.4 mi NW of Goshen, 0.5 mi W of Hwy 99, 0.7 mi N of Cross Creek. 83 Comment
  UCD166855  Atriplex cordulata var. cordulata Robert E. Preston 2016-8-2 3063 Tulare 4.3 mi NW of Goshen, 0.5 mi W of Hwy 99, 0.5 mi N of Cross Creek. 83 Comment
  UCD166857  Atriplex subtilis Robert E. preston 2016-8-2 3061 Tulare 4.25 mi NW of Goshen, 0.5 mi W of Hwy 99, 0.3 mi N of Cross Creek. 82 Comment
  UCD77282  Plagiobothrys humistratus Robert E. Preston 1998-3-25 1086 Tulare County landfill property, 5.7mi E of Tulare Municipal Airport. 93 Comment
  UCD77368  Atriplex subtilis Robert E. Preston 1998-5-11 1102 Tulare County landfill property, 5.7mi se of Tulare Municipal Airport 93 Comment
  UCD77376  Atriplex minuscula Robert E. Preston 1997-10-21 1055 Tulare County landfill property, 5.7mi se of Tulare Municipal Airport 93 Comment
  UCD77383  Atriplex cordulata var. erecticaulis Robert E. Preston 2002-9-12 1950 Tulare 1.5 mi W of Earlimart, in fields N of Sierra Ave at jct with Schott Rd 78 Comment
  UCD77386  Atriplex cordulata var. erecticaulis Robert E. Preston 2000-9-6 1440 Tulare Ca. 0.8 mi s of Yettem, on e side of Road 144, T17S R25E se 1/4 Section 3 102 Comment
  UCD77389  Atriplex persistens Robert E. Preston 2000-9-6 1439 Tulare Yettem, on n side of State Route 201, 0.5 mi e of Rd 144, T16S R25E se 1/4 Section 34 105 Comment
  UCD77395  Atriplex minuscula Robert E. Preston 2002-9-12 1947 Tulare Goshen, in field on N side of Ave. 308, 0.4 mi W of Road 76 88 Comment
  UCD77405  Atriplex subtilis Robert E. Preston 1999-8-17 1228 Tulare County landfill property, 5.7mi E of Tulare Municipal Airport, T25 E R20S NW 1/4 Section 35 93 Comment
  UCD77407  Atriplex minuscula Robert E. Preston 1999-8-17 1229 Tulare County landfill property, 5.7mi E of Tulare Municipal Airport, T25 E R20S NW 1/4 Section 35 93 Comment
  UCD77413  Atriplex cordulata var. erecticaulis Robert E. Preston 1999-8-17 1230 Tulare County landfill property, 5.7mi E of Tulare Municipal Airport, T25 E R20S NW 1/4 Section 35 93 Comment
  UCD77483  Castilleja brevistyla Robert E. Preston 1998-3-25 1082 Tulare County landfill property, 5.7mi E of Tulare Municipal Airport. 93 Comment
  UCD77591  Delphinium hansenii subsp. ewanianum Robert E. Preston 1998-5-11 1101 Tulare County landfill expansion parcel, 5.7mi se of Tulare Municipal Airport 93 Comment
  UCD77601  Delphinium recurvatum Robert E. Preston 1998-3-25 1083 Tulare County landfill property, 5.7mi E of Tulare Municipal Airport 93 Comment
  UCD77778  Hordeum depressum Robert E. Preston 1998-3-25 1081 Tulare County landfill property, 5.7 mi E of Tulare Municipal Airport. 93 Comment
  UCD77796  Lasthenia chrysantha Robert E. Preston 1998-3-25 1085 Tulare County landfill property, 5.7mi E of Tulare Municipal Airport 93 Comment
  UCD77967  Puccinellia simplex Robert E. Preston 1998-3-25 1087 Tulare County landfill property, 5.7mi E of Tulare Municipal Airport 93 Comment
  UCD78058  Trifolium depauperatum var. amplectens Robert E. Preston 2006-4-7 2373 Tulare 7.6 miles SW of Tulare, at Landfill Conservation Preserve. 92 Comment
  UCD78168  Minuartia douglasii Robert E. Preston 2008-4-29 2620 Tulare 6 mi E of Strathmore, in hills along E side of Frazier Valley 392 Comment
  UCD78169  Castilleja lineariloba Robert E. Preston 2008-4-30 2622 a Tulare 6 mi ENE of Lindsay. 457 Comment
  UCD78170  Microseris sylvatica Robert E. Preston 2008-4-30 2622 b Tulare 6 mi ENE of Lindsay 457 Comment
  UCD78173  Mirabilis laevis var. crassifolia Robert E. Preston 2008-5-1 2625 Tulare 7.9 mi ENE of Exeter, in hills E of Dry Creek 393 Comment
  UCD78174  Melica californica Robert E. Preston 2008-5-1 2626 Tulare 2.5 mi E of Lemon Cove 514 Comment
  UCD78175  Hesperocnide tenella Robert E. Preston 2008-5-2 2627 Tulare Ca. 3.1 miles E of Woodlake, in hills S of Arrastra Canyon 224 Comment
  UCD78176  Layia pentachaeta subsp. pentachaeta Robert E. Preston 2008-5-2 2628 Tulare Ca. 3.3 Mi E of Woodlake, in hills ca. 1 mi S of Arrastra Canyon 181 Comment
  UCD94580  Vulpia microstachys var. pauciflora Robert E. Preston 2006-4-7 2374 Tulare 7.6 miles SW of Tulare, at County Landfill Conservation Preserve. 92 Comment
  SBBG115359  Puccinellia simplex R. E. Preston 1998-3-25 1087 Tulare County landfill property, ca. 5.7 mi E of Tulare Municipal Airport; T25E, R20S, NW 1/4, S35 93 Comment
  UCD77390  Atriplex cordulata var. erecticaulis Robert E. Preston 2000-9-6 1441 Tulare Ca. 7 mi n of Goshen, on e side of Road 80, 0.1 mi n of Avenue 360, T17S R24E nw 1/4 of ne 1/4 Section 20 87 Comment
  UCD77710  Eryngium spinosepalum Robert E. Preston 2000-9-6 1438 Tulare 2.1 mi e of Orange Cove, 1.1 mi e of State Route 63, on s side of Avenue 460. 149 Comment
  UCD116110  Streptanthus polygaloides Robert E. Preston 1991-4-3 598 Tuolumne Jumper Mine, 1.2 miles south of Stent. Comment
  UCD116289  Streptanthus tortuosus Robert E. Preston 1984-5-6 442 Tuolumne 6.4 km SE of Moccasin, E side of Highway 49. 488 Comment
  UCD125890  Trichostema rubisepalum Robert E. Preston 1991-7-18 602 Tuolumne Stoller Ranch, ca. 0.8 mile WSW of Stent. Comment
  UCD125891  Trichostema rubisepalum Robert E. Preston 1991-7-18 603 Tuolumne Red Hills, ca. 0.5 miles west of dirt road, from Red Hills Road ca. 0.3 mile south of junction with Sims Road. 327 Comment
  UCD138551  Allium jepsonii Robert E. Preston 1991-6-20 601 Tuolumne top of Table Mountain, north of Jamestown Mine. 487 Comment
  UCD138611  Allium triquetrum Robert E. Preston 1991-4-3 596 Tuolumne Jumper Mine, ca. 1.2 mi S of Stent. Comment
  UCD77194  Brodiaea coronaria Robert E. Preston 2004-5-15 2242 Tuolumne Ca. 0.5 mi SW of Chinese Camp. 381 Comment
  UCD77765  Hesperevax caulescens Robert E. Preston 2001-5-2 1529 Tuolumne Ca. 1.75 mi ne of Knights Ferry, T1S, R12E, ne 1/4 of sw 1/4 Section 22 146 Comment
  UCD77827  Limnanthes Robert E. Preston 2001-5-3 1531 Tuolumne Ca. 1.75 mi ne of Knights Ferry. 152 Comment
  JEPS114044  Eryngium jepsonii Robert E. Preston 2007-4-20 2434 Yolo 7.6 mi S of Davis, on Tule Ranch Comment
  JEPS114055  Boehmeria cylindrica Robert E. Preston 2007-10-4 2581 Yolo 2.5 mi S of Clarksburg, along Sacramento River, ca. 200 m S of the boat ramp. Comment
  UCD115216  Lepidium acutidens Robert E. Preston 1996-3-23 905 Yolo SE of Woodland, NW of int Rd 25 and Rd 103. 9 Comment
  UCD115255  Lepidium dictyotum Robert E. Preston 1996-3-23 906 Yolo SE of Woodland, NW of int Rd 25 and Rd 103. 9 Comment
  UCD115811  Lepidium nitidum Robert E. Preston 1996-3-23 907 Yolo SE of Woodland, NW of int Rd 25 and Rd 103. 9 Comment
  UCD120841  Plagiobothrys humistratus Robert E. Preston 1996-3-23 904 Yolo SE of Woodland, NW of int Rd 25 and Rd 103. 9 Comment
  UCD147028  Sidalcea keckii Robert E. Preston 2012-5-16 2874 a Yolo 6.6 mi SW of Dunnigan, in Wood Canyon. 175 Comment
  UCD147029  Navarretia heterandra Robert E. Preston 2012-5-16 2874 b Yolo 6.6 mi SW of Dunnigan, in Wood Canyon. 175 Comment
  UCD147031  Navarretia nigelliformis subsp. nigelliformis Robert E. Preston 2012-5-16 2875 a Yolo 6.6 mi SW of Dunnigan, in Wood Canyon. 175 Comment
  UCD147032  Navarretia pubescens Robert E. Preston 2012-5-16 2876 a Yolo 6.6 mi SW of Dunnigan, in Wood Canyon. 175 Comment
  UCD148274  Bolboschoenus glaucus Robert E. Preston 2013-8-18 2937 Yolo Yolo Bypass, 0.1 mi N of I-80, 0.5 mi E of west levee. 12 Comment
  UCD148279  Symphyotrichum Robert E. Preston 2013-10-23 2942 Yolo Yolo Bypass, at N end of Greens Lake. 3 Comment
  UCD77503  Centromadia parryi subsp. rudis Robert E. Preston 1999-9-11 1241 Yolo 3 mi SE of Woodland, in fields N of Road 25. 9 Comment
  UCD77979  Rumex stenophyllus Robert E. Preston 1998-5-3 1099 Yolo U. C. Davis campus, in fields on E side of Veterinary Hospital 17 Comment
  UCD80861  Eryngium jepsonii Robert E. Preston 2007-4-20 2434 Yolo 7.6 mi S of Davis, on Tule Ranch. 12 Comment
  UCD80883  Boehmeria cylindrica Robert E. Preston 2007-10-4 2581 Yolo 2.5 miles S of Clarksburg, along Sacramento River, ca. 200 m S of the boat ramp. 1 Comment
  UCD92247  Puccinellia simplex Robert E. Preston 1996-3-23 908 Yolo SE of Woodland, NW of int Rd 25 and Rd 103. 9 Comment
  UCD97399  Atriplex depressa Robert E. Preston 1993-7-25 627 Yolo SE of Woodland, N of Willow Slough, in field NW of jct Roads 25 and 103. 9 Comment
  UCD97477  Atriplex joaquinana Robert E. Preston 1993-7-25 626 Yolo SE of Woodland, N of Willow Slough, in field NW of jct Roads 25 and 103. 9 Comment
  UCR80854  Atriplex joaquinana Robert E. Preston 1993-7-25 626 Yolo SE of Woodland, north of Willow Slough, field NW of junction of Roads 25 and 103. 9 Comment
  UCD114681  Caulanthus lasiophyllus Robert E. Preston 1984-5-4 439 Yolo Cold Canyon, ca. 0.4 mile S of Highway 128. 121 Comment
  UCD115221  Lepidium acutidens Robert E. Preston 1996-3-23 909 Yolo ca. 1.9 mi NNE of Davis, on N side of Rd 28H, 0.4 mi E of Rd 103. 9 Comment
  UCD115223  Lepidium acutidens Robert E. Preston 1996-3-23 911 Yolo ca. 1 mi N of Davis; at edge of field along E side of Rd 102. 9 Comment
  UCD115812  Lepidium nitidum Robert E. Preston 1996-3-23 910 Yolo ca. 1.9 mi NNE of Davis, on N side of Rd 28H, 0.4 mi E of Rd 103. 9 Comment
  UCD115813  Lepidium nitidum Robert E. Preston 1996-3-23 912 Yolo ca. 1 mi N of Davis; at edge of field along E side of Rd 102. 9 Comment
  UCD147054  Amaranthus tuberculatus var. rudis Robert E. Preston 2007-10-4 2582 Yolo 2.5 mi S of Clarksburg, along Sacramento River, at boat ramp; river's edge. Comment
  UC1777687  Holozonia filipes Robert E. Preston 1997-10-30 1059 Yuba 300 ft N of Doolittle Dr. Hutchinson Creek; Beale Air Force Base Comment
  UCD148231  Dichelostemma lacuna-vernalis Robert E. Preston 2013-3-16 2892 Yuba Along Hammonton-Smartville Rd, 2.4 mi E of Doolittle Drive. 63 Comment
  UCD53049  Agrostis microphylla Robert E. Preston 1995-5-10 867 Yuba N edge of Beale Air Force Base, 0.4 mi. e. of jct Smartsville Road and Doolittle Drive. 41 Comment
  UCD77152  Brodiaea appendiculata Robert E. Preston 2005-4-20 2337 Yuba Olivehurst, 0.2 mi S of jct Hwy 70 and McGowan Parkway 17 Comment
  UCD77153  Brodiaea coronaria Robert E. Preston 2003-5-25 2147 Yuba Ca. 3.65 mi WSW of Smartville, along Hammonton-Smartville Rd. 98 Comment
Read comments Jun 17 2014
  UCD77168  Brodiaea minor Robert E. Preston 2004-6-12 2259 Yuba 2.9 mi W of Dobbins, along Frenchtown Rd, 2.2 mi N of its jct with Marysville Rd 445 Comment
  UCD77170  Brodiaea minor Robert E. Preston 2004-6-12 2258 Yuba 0.9 mi E of Dobbins, along Marysville Rd 644 Comment
  UCD77171  Brodiaea elegans subsp. elegans Robert E. Preston 2004-6-12 2257 Yuba 1.6 mi SW of Camptonville, along Marysville Rd, 0.2 mi W of its jct with Hwy 49 762 Comment
  UCD77172  Brodiaea coronaria Robert E. Preston 2004-6-12 2256 Yuba 1.6 mi SW of Camptonville, along Marysville Rd, 0.2 mi W of its jct with Hwy 49. 762 Comment
  UCD77179  Brodiaea minor Robert E. Preston 2002-6-28 1895 Yuba Brownsville, at jct Willow Glen Rd and Frenchtown Rd, behind Post Office. 625 Comment
  UCD77791  Lagophylla glandulosa Robert E. Preston 1997-10-29 1058 Yuba Beale Air Force Base, east of Golf Course 39 Comment
  UCD78080  Vicia benghalensis Robert E. Preston 2005-4-20 2335 Yuba Linda, ca. 0.5 mi S of Beale Road, along PG and E right-of-way 21 Comment
  UCD78202  Brodiaea sierrae R. E. Preston 2002-6-28 1894 Yuba Brownsville, at jct Willow Glen Rd and Holmer Way. 626 Comment
  UCD78204  Brodiaea sierrae Robert E. Preston 2004-6-19 2262 Yuba 1.7 mi NE of Challenge, along La Porte Rd. 944 Comment
  JEPS110504  Rorippa curvisiliqua var. occidentalis Robert E. Preston 1997-10-29 1057 Yuba Beale Air Force Base, E of Golf Course. 39 Comment
  UCD133257  Holozonia filipes Robert E. Preston 1997-10-30 1059 Yuba Beale Air Force Base, on lower bank and in dry channel of Hutchinson Creek, around 300 feet north of Doolittle Drive. 35 Comment
  UCD139146  Brodiaea R. E. Preston 1996-5-22 936 Yuba Beale Air Force Base. 30 Comment
  UCD57065  Buchloe dactyloides R. E. Preston 1996-4-11 927 Yuba Beale Air Force Base. Adjacent to parking lot N of Air Combat Command. 33 Comment
  UCD77822  Lessingia nana Robert E. Preston 2001-7-30 1753 Yuba Beale Air Force Base, in open area at north end of taxiways, 39 Comment



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