Search Results — 1022 specimen records retrieved (825 records with coordinates)
Results for search: Scientific name=Ambrosia psilostachya (including nomenclatural synonyms);   More information: Jepson Online Interchange

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 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-BC133200  Ambrosia psilostachya T. B. Salvato 2010-9-27 5121 Orange South Coast: Dana Point Headlands, Harbor Point Park, south of Scenic Dr. and Cove Rd., beyond the end of Green Lantern St., overlooking Dana Point Harbor 70 Comment
  CAS-BOT-BC45014  Ambrosia psilostachya Le Roy Abrams 1902-8-18 2957 Los Angeles Ballona Creek, near Mesmer Comment
  CAS-BOT-BC45015  Ambrosia psilostachya Peter H. Raven 1957-9-21 11352 Los Angeles Santa Monica Mountains, Monte Nido Fire Station Comment
  CAS-BOT-BC45021  Ambrosia psilostachya John Thomas Howell 1944-9-24 20756 Marin East side of Bolinas Lagoon Comment
  CAS-BOT-BC45022  Ambrosia psilostachya Hugh B. Leech 1948-9-1 s.n. Marin Mill Valley Comment
  CAS-BOT-BC45024  Ambrosia psilostachya John Thomas Howell 1963-5-18 39309 Monterey 2.5 miles south of Aromas 60 Comment
  CAS-BOT-BC45025  Ambrosia psilostachya John Thomas Howell 1963-9-4 40320 Monterey Moss Landing Comment
  CAS-BOT-BC45026  Ambrosia psilostachya Ernest C. Twisselmann 1970-6-11 16688 Monterey Salinas River, ca 1 mile above its mouth 6 Comment
  CAS-BOT-BC45027  Ambrosia psilostachya Ernest C. Twisselmann 1970-6-11 16688 Monterey Salinas River, ca 1 mile above its mouth 6 Comment
  CAS-BOT-BC45059  Ambrosia psilostachya Gordon H. True 1961-10-5 292 Nevada 5 miles SW of Grass Valley, on McCourtney Rd., at French Ravine 640 Comment
  CAS-BOT-BC45060  Ambrosia psilostachya Ira L. Wiggins 1965-10-27 20304 Orange Roadside just SW of Los Angeles County line along Brea Canyon Road Comment
  CAS-BOT-BC45061  Ambrosia psilostachya Ira L. Wiggins 1965-11-6 20346 Orange Roadside near well no. 14, Kraemer Oil Estates, near end of county road leading to Rancho Santa Ana. Comment
  CAS-BOT-BC45063  Ambrosia psilostachya Ira L. Wiggins 1965-10-18 20272 Orange Vacant lot, NE corner of Chapman Ave. and Victor Dr., Fullerton Comment
  CAS-BOT-BC45064  Ambrosia psilostachya John Thomas Howell 1927-9-24 3121 Orange Santa Ana River bottom, Santa Ana Canyon 152 Comment
  CAS-BOT-BC45066  Ambrosia psilostachya C. R. Quick 1950-9-6 50 -47 Sacramento Merritt Island, about 15 miles SW of Sacramento, adjacent of Sacramento River. Comment
  CAS-BOT-BC45068  Ambrosia psilostachya Georgia Bentley 1919-10-1 22 Sacramento Sacramento Comment
  CAS-BOT-BC55528  Ambrosia psilostachya L. R. Abrams 1902-9-21 2992 San Mateo Crystal Lake Comment
  CAS-BOT-BC55530  Ambrosia psilostachya Henry M. Pollard 1950-10-22 s.n. Santa Barbara Sandyland (near Carpenteria) Comment
  CAS-BOT-BC55531  Ambrosia psilostachya Alice Eastwood 1917-7-30 s.n. Santa Barbara Santa Barbara Comment
  CAS-BOT-BC55532  Ambrosia psilostachya Le Roy Abrams 1902-10-13 3077 Santa Cruz Aptos Comment
  CAS-BOT-BC55533  Ambrosia psilostachya W. R. Dudley 1902-10-13 s.n. Santa Cruz Aptos Comment
  CAS-BOT-BC55535  Ambrosia psilostachya W. R. Dudley 1905-10-15 s.n. Solano Suisun marshes Comment
  CAS-BOT-BC55536  Ambrosia psilostachya John H. Thomas 1955-5-21 5086 A Solano Along north shore of Carquinez Straight, 1.4 miles east of the center of Benecia 0 Comment
  CAS-BOT-BC55538  Ambrosia psilostachya Marion L. Campbell 1920-8-17 s.n. Solano Cordelia Comment
  CAS-BOT-BC55539  Ambrosia psilostachya W. R. Dudley 1905-10-15 s.n. Solano Suisun marshes Comment
  CAS-BOT-BC55541  Ambrosia psilostachya Peter Rubtzoff 1951-9-15 762 Sonoma Pitkin Marsh Comment
  CAS-BOT-BC55542  Ambrosia psilostachya Peter Rubtzoff 1951-9-15 762 Sonoma Pitkin Marsh Comment
  CAS-BOT-BC55543  Ambrosia psilostachya Lowell Ahart 1984-10-22 4825 Sutter South Butte, Sutter Buttes 300 Comment
  CAS-BOT-BC55544  Ambrosia psilostachya Lowell Ahart 1977-7-24 1103 Sutter South Butte, Sutter Buttes 400 Comment
  CAS-BOT-BC55547  Ambrosia psilostachya Lowell Ahart 1981-9-10 s.n. Sutter South Butte, Sutter Buttes 450 Comment
  CAS-BOT-BC55549  Ambrosia psilostachya Junea Kelly 1921-9-20 s.n. Tulare Porterville Comment
  CAS-BOT-BC55551  Ambrosia psilostachya Peter H. Raven; Henry J. Thompson 1959-9-6 14381 Los Angeles Mouth of Malibu Creek Comment
  CAS-BOT-BC55552  Ambrosia psilostachya Lewis S. Rose 1966-12-24 66115 Los Angeles Westwood Village 121 Comment
  CAS-BOT-BC55554  Ambrosia psilostachya R. K. Brummitt; N. A. Brummitt 1999-8-8 s.n. San Diego Near N end of Cuyamaca Lake beside Sunrise Hwy. (S1) 1500 Comment
  CAS-BOT-BC55555  Ambrosia psilostachya A. C. Sanders; Kerry Knudsen; J. R. Ekhoff 2004-7-9 28475 San Diego Peninsular Range: 793 Comment
  CAS-BOT-BC55556  Ambrosia psilostachya George Park 1912-8-12 119 San Diego Cleveland Forest 487 Comment
  CAS-BOT-BC55557  Ambrosia psilostachya Ira L. Wiggins 1927-8-29 2605 San Diego Along Hatfield Creek 4 miles east of Ramona on highway to Santa Ysabel Comment
  CAS-BOT-BC55558  Ambrosia psilostachya Ira L. Wiggins 1926-10-16 2111 San Diego Near old mine 4 mi. from Julian on road to Cuyamaca Comment
  CAS-BOT-BC55559  Ambrosia psilostachya G. R. Kleeberger 1878-10-13 s.n. San Diego San Diego0 Comment
  CAS-BOT-BC55560  Ambrosia psilostachya Ira L. Wiggins 1926-10-16 2111 San Diego Near old mine 4 miles from Julian on road to Cuyamaca Comment
  CAS-BOT-BC55561  Ambrosia psilostachya Ira L. Wiggins 1927-8-30 2670 San Diego On west side of North Peak Comment
  CAS-BOT-BC55562  Ambrosia psilostachya Ira L. Wiggins 1927-8-30 2670 San Diego On west side of North Peak Comment
  CAS-BOT-BC55563  Ambrosia psilostachya H. H. van der Werff 1980-8-10 4120 San Diego Corte Madera Ranch, Pine Valley 1200 Comment
  CAS-BOT-BC55564  Ambrosia psilostachya Wro 1286 San Diego S. of Batiquitos Lagoon Comment
  CAS-BOT-BC55565  Ambrosia psilostachya Roxana S. Ferris 1956-9-15 13064 San Diego Sweetwater River, ca. 2 mi. above Bonita Comment
  CAS-BOT-BC55566  Ambrosia psilostachya Roxana S. Ferris 1956-9-13 13051 San Diego State Highway 94, 5.8 mi. NW of Dulzura (Jamul Rancho) Comment
  CAS-BOT-BC55567  Ambrosia psilostachya Ira L. Wiggins 1922-12-30 1046 San Diego Between Campo and Potrero Comment
  CAS-BOT-BC55570  Ambrosia psilostachya Ernest C. Twisselmann 1959-11-2 5887 San Luis Obispo Southwest end of Oso Flaco Lake 4 Comment
  CAS-BOT-BC55571  Ambrosia psilostachya R. F. Hoover 1965-9-29 9673 San Luis Obispo Tassajera Creek Comment
  CAS-BOT-BC55573  Ambrosia psilostachya Clare B. Hardham 1957-9-12 2598 San Luis Obispo Creston Comment
  CAS-BOT-BC55574  Ambrosia psilostachya R. F. Hoover 1966-9-16 10040 San Luis Obispo 3 mi. n. of Santa Margarita Comment
  CAS-BOT-BC55581  Ambrosia psilostachya Ellsworth Bethel 1916-7-7 s.n. Alameda Berkeley Comment
  CAS-BOT-BC55583  Ambrosia psilostachya A. A. Heller 1914-8-11 11759 Butte Chico-Hamilton road, 6 miles from Chico Comment
  CAS-BOT-BC55584  Ambrosia psilostachya Lowell Ahart 1982-10-11 3859 Butte Gray Lodge, south-west of Gridley 35 Comment
  CAS-BOT-BC55585  Ambrosia psilostachya A. A. Heller 1914-8-11 11759 Butte On the Chico-Hamilton road 6 miles from Chico Comment
  CAS-BOT-BC55587  Ambrosia psilostachya Roxana Stinchfield 1916-7-8 376 Colusa Along Sycamore Slough. Stinchfield Ranch Comment
  CAS-BOT-BC55588  Ambrosia psilostachya Roxana Stinchfield 1916-6-17 276 Colusa Cemetery, College City Comment
  CAS-BOT-BC55589  Ambrosia psilostachya Walter Knight; Joanne Dean 1978-8-14 3115 Contra Costa Browns Island Comment
  CAS-BOT-BC55590  Ambrosia psilostachya Walter Knight 1965-9-7 1167 Contra Costa San Joaquin River at Antioch sand dunes Comment
  CAS-BOT-BC55592  Ambrosia psilostachya G. P. Rixford 1906-9-5 s.n. El Dorado Shingle Springs Comment
  CAS-BOT-BC55593  Ambrosia psilostachya G. L. Stebbins 1976-9-25 76292 El Dorado 4 miles west of Coloma, along South Fork American River 213 Comment
  CAS-BOT-BC55594  Ambrosia psilostachya John Thomas Howell 1969-9-12 46074 El Dorado Placerville 579 Comment
  CAS-BOT-BC55595  Ambrosia psilostachya Louis C. Wheeler 1966-10-1 8929 Los Angeles San Gabriel Mountains: Big Tujunga at Colby Ranch Road 960 Comment
  CAS-BOT-BC55596  Ambrosia psilostachya Carl B. Wolf 1932-10-5 4241 Los Angeles Santa Catalina Island. Junction of Isthmus Road & Road to Black Jack Peak 243 Comment
  CAS-BOT-BC55597  Ambrosia psilostachya D. E. Breedlove 1961-9-24 1293 Los Angeles Middle Ranch Canyon, 0.5 mi above Ben Weston Beach; Santa Catalina Island 60 Comment
  CAS-BOT-BC55598  Ambrosia psilostachya J. Ewan 1931-10-24 5267 Los Angeles North shore Malibu Lake, Santa Monica Mts. Comment
  CAS-BOT-BC55599  Ambrosia psilostachya Carl B. Wolf 1932-9-16 4100 Los Angeles Bryant Ranch. 100-150 ft. W of state highway, at extreme SE corner of Pacific Western Oil Co. lease 3 Comment
  CAS-BOT-BC55600  Ambrosia psilostachya Grinnell Jr. 1917-9-9 s.n. Los Angeles Los Angeles river bottoms near los Angeles Comment
  CAS-BOT-BC55610  Ambrosia psilostachya Evelina Cannon 1900-9-17 s.n. Unknown Giant station Comment
  CAS-BOT-BC55611  Ambrosia psilostachya W. R. Dudley 1908-10-10 s.n. Santa Cruz Near railroad bridge over Pajaro River at Watsonville Comment
  CAS-BOT-BC55612  Ambrosia psilostachya J. W. Congdon 1881-9-1 s.n. Tulare Visalia Comment
  CAS-BOT-BC55613  Ambrosia psilostachya F. E. Blaisdell undated s.n. Calaveras Mokelumne Hill 396 Comment
  CAS-BOT-BC55614  Ambrosia psilostachya Ira L. Wiggins 1929-10-5 4191 Fresno 2 miles northeast of Fresno Comment
  CAS-BOT-BC55615  Ambrosia psilostachya Peter H. Raven; R. Snow 1958-7-22 13674 Mendocino Russian River, 9.2 miles south of Hopland Comment
  CAS-BOT-BC55617  Ambrosia psilostachya W. R. Dudley 1903-12-26 s.n. Riverside Palm Canon, Riverside Canon Comment
  CAS-BOT-BC55618  Ambrosia psilostachya H. M. Hall 1901-8-1 s.n. Riverside Vicinity of Riverside 304 Comment
  CAS-BOT-BC55619  Ambrosia psilostachya S. B. Parish; W. F. Parish 1889-9-1 s.n. San Bernardino San Bernardino Valley Comment
  CAS-BOT-BC55620  Ambrosia psilostachya A. R. Roos 1937-11-15 s.n. San Bernardino Loma Linda Comment
  CAS-BOT-BC55624  Ambrosia psilostachya L. R. Abrams 1917-9-14 6747 San Joaquin 8 miles south of Woodbridge Comment
  CAS-BOT-BC64706  Ambrosia psilostachya W. R. Dudley 1900-8-19 3359 Tulare 10 miles N.E. of Visalia Comment
  CAS-BOT-BC64708  Ambrosia psilostachya W. R. Dudley 1900-8-19 3359 Tulare 10 miles N.E. of Visalia Comment
  CAS-BOT-BC64709  Ambrosia psilostachya J. W. Congdon 1881-9-1 s.n. Tulare Visalia Comment
  CAS-BOT-BC64710  Ambrosia psilostachya Henry M. Pollard 1944-10-7 s.n. Ventura Matilija Canyon, Ojai Valley Comment
  CAS-BOT-BC64711  Ambrosia psilostachya Steven A. Junak; C. Kuizenga; S. Timbrook 1983-3-21 SN- 057 Ventura San Nicolas Island: W of airfield terminal 152 Comment
  CAS-BOT-BC64712  Ambrosia psilostachya Henry M. Pollard 1961-9-25 s.n. Ventura Ventura River nr. Rodriguez Canyon Comment
  CAS-BOT-BC64713  Ambrosia psilostachya Nora Pettibone; Frank W. Hubby 1894-11-29 s.n. Ventura Ojai Valley and vicinity Comment
  CAS-BOT-BC64714  Ambrosia psilostachya Henry M. Pollard 1966-10-12 s.n. Ventura San Antonio Creek north of Rancho Arnaz orchards, Oak View Comment
  CAS-BOT-BC64715  Ambrosia psilostachya Henry M. Pollard 1963-10-25 s.n. Ventura Devil's Gulch, Oak View Comment
  CAS-BOT-BC64716  Ambrosia psilostachya Henry M. Pollard 1967-10-20 s.n. Ventura Below Southern Pacific R.R. in Ventura River, Casitas Springs Comment
  CAS-BOT-BC64717  Ambrosia psilostachya Henry M. Pollard 1967-9-20 s.n. Ventura So. Ventura Ave. near Santa Clara St. Comment
  CAS-BOT-BC64718  Ambrosia psilostachya A. J. Babbinger 1920-10-24 s.n. Yolo Upper Capay Valley Comment
  CAS-BOT-BC64719  Ambrosia psilostachya Clarence R. Quick 1971-8-26 71 -59 Yolo Pylman-Quick garden, Merritt Island, near Clarksburg Comment
  CATA1941  Ambrosia psilostachya E. R. Blakley 1962-10-5 5447 Los Angeles Santa Catalina Island: Cottonwood Canyon, 0.25 mile upstream from ocean 30 Comment
  CATA3169  Ambrosia psilostachya Amy Catalano 2016-8-25 150 Los Angeles Santa Catalina Island: Junction of Middle Ranch Road and Airport Road 415 Comment
  CATA3536  Ambrosia psilostachya Peter J. Dixon 2017-9-13 103 Los Angeles Santa Catalina Island: Pacific side; Shark Harbor; salina and dune, coastal flat, very near coast, growing in sand or mud flat 0 Comment
  CATA404  Ambrosia psilostachya Mark L. Hoefs, A. Douglas Propst & Robert F. Thorne 1974-9-12 531 Los Angeles Santa Catalina Island: Cottonwood Stream, above bridge at main road 22 Comment
  CATA563  Ambrosia psilostachya Mark L. Hoefs, Robert F. Thorne 1975-8-7 827 Los Angeles Santa Catalina Island: Lower Cottonwood Canyon 60 Comment
  CDA10047  Ambrosia psilostachya D. G. Kelch 2006-12-9 6 .551 Orange Irvine. University Dr along tidal creek just E of I-73. Comment
  CDA10048  Ambrosia psilostachya L. Ahart 2006-10-8 13389 Plumas On the north side of the North Fork of the Feather River, on the south side of Highway 70, about 1/8 mile southwest of Chambers Creek. Comment
  CDA10050  Ambrosia psilostachya A. G. Murdock, D. G. Kelch 2003-9-12 180 Solano Mare Island. Comment
  CDA10052  Ambrosia psilostachya M. K. Bellue Sep 1937 Sacramento 30 & J or K Streets, Sacramento. 0 Comment
  CDA10054  Ambrosia psilostachya M. K. Bellue 1937-9-1 Sacramento Sacramento City Streets. 0 Comment
  CDA10055  Ambrosia psilostachya L. Ahart 2002-10-1 9976 Yuba On the west side of the dirt road, east of the upper part of Englebright Reservoir on the Yuba River, along Rice s Crossing Road, about 2 miles (air) north of Bridgeport, about 18 miles north of Highway 20. Comment
  CDA10056  Ambrosia psilostachya A. C. Browne 1953-10-21 San Diego 10 miles east of Tecate. 0 Comment
  CDA12544  Ambrosia psilostachya G. F. Hrusa 1990-9-4 8198 Sacramento Natoma Unit-Folsom Lake State Rec. Area; Bike trail at base of American River Bluffs. Comment
  CDA16115  Ambrosia psilostachya G. F. Hrusa 1999-8-28 15269 Yolo Sacramento Valley; Tule canal. Levee Rd., Rd. 107, +/- 1/4 mi N of I-5. 7 Comment
  CDA23573  Ambrosia psilostachya D. G. Kelch 2007-9-6 7 .562 Solano Vaca Range; Lagoon Valley, along Cherry Glen Rd. Comment
  CDA23779  Ambrosia psilostachya D. G. Kelch 2006-8-11 6 .369 Solano Carquinez Strait; Benicia State Recreation Area. Southampton Marsh. Comment
  CDA23788  Ambrosia psilostachya Daniel Gluesenkamp 2006-11-23 s.n. San Diego Fallbrook. 1524 Dickey St in abandoned citrus orchard. Comment
  CDA25211  Ambrosia psilostachya G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13114 Sutter Sacramento Valley; Along Nicolaus Road at Coon Creek, 0.9 mile west of Placer County line. Comment
  CDA25220  Ambrosia psilostachya A. C. Sanders, Fred M. Roberts 2008-8-7 35990 Orange Peninsular Range; Santa Ana Mountains.; Lower Weir Canyon, at narrow gorge c. 0.6 mile above mouth of canyon at Irvine Ranch gate. Comment
  CDA31355  Ambrosia psilostachya D. G. Kelch 2006-9-27 6 .487 Solano Suisun Marsh; Mill Slough, Grizzly Island Road. Comment
  CDA32033  Ambrosia psilostachya D. Isle, Rhonda Isle 2007-9-9 1624 Colusa Mendocino National Forest- North Coast Ranges Middle Fork Stony Creek Watershed; Stonyford Park at NW edge of Indian VA Elementary School; about 100 yds SE of Co. Rd 306 Stony Creek Bridge; about 1/4 mile S of Glenn Co. line. 0 Comment
  CDA34620  Ambrosia psilostachya L. Ahart, John Dittes, Josephine Guardino 2008-11-8 15438 Butte On the south bank of Lindo Channel, about 50 yards west of the diversion structure, north of Hooker Oak, Upper Bidwell Park, Chico. Comment
  CDA37107  Ambrosia psilostachya CDFA Staff s.n. Solano Putah Creek Riparian Preserve, UC Davis. 0 Comment
  CHSC100492  Ambrosia psilostachya Lowell Ahart; John Dittes, Josephine Guardino 2008-11-8 15438 Butte On the south bank of Lindo Channel, about 50 yards west of the diversion structure, north of Hooker Oak, Upper Bidwell Park, Chico. 68 Comment
  CHSC101072  Ambrosia psilostachya David W. Isle; Rhonda Isle 2007-9-9 1624 Colusa Stonyford Park at NW edge of Indian VA Elementary School; about 100 yds SE of Co. Rd 306 Stony Creek Bridge; about 1/4 mile S of Glenn Co. line. Comment
  CHSC105790  Ambrosia psilostachya Lowell Ahart 2010-9-13 17152 Butte Open dry areas, Oroville Wildlife Area, about 1/2 mile west of Pacific Heights Road, about 3 1/2 miles (air) northwest of Palermo. 31 Comment
  CHSC112497  Ambrosia psilostachya Lowell Ahart 2013-10-22 19204 Glenn Above the high water line of Stony Gorge Reservoir, about 2 1/2 miles south of the dam, about 17 miles (air) northwest of Willows. 240 Comment
  CHSC113031  Ambrosia psilostachya Lowell Ahart 2013-8-8 19016 Glenn North end of Grizzly Flat, strand of Black Butte Reservoir, about 9 miles (air) west of Orland. 132 Comment
  CHSC116013  Ambrosia psilostachya Lowell Ahart 2015-10-9 20539 Butte West edge of Highway 32, about 100 yards south of Ten Mile House road, about 10 miles northeast of Chico. 464 Comment
  CHSC117637  Ambrosia psilostachya Lowell Ahart; John Dittes 2016-8-25 21304 Tehama Along the west side of the Sacramento River, Anderson River Park, 0.7 mile (air) upstream from Sillwater Creek Confluence, 1.8 miles (air) northeast of Balls Ferry Road exit from Interstate 5 in Anderon. Undesignated section of San Buenaventura Land Grant. 117 Comment
  CHSC21175  Ambrosia psilostachya M. S. Taylor 1975-10-29 977 Butte Ca. 10 ft S of Humbug Rd, ca. 4 mi E of junc of the Skyway and Humbug Rd. Comment
  CHSC24602  Ambrosia psilostachya M. S. Taylor 1976-9-4 1253 Monterey On E side of Hillsdale Ave, ca. 10 ft S of Trinity Ave, Seaside. 6 Comment
  CHSC26622  Ambrosia psilostachya M. P. Hayes 1977-9-24 120 Butte In drainage of Little Butte Creek where Little Butte Creek intersects road Z (Chico-Butte City Highway). 30 Comment
  CHSC26661  Ambrosia psilostachya M. S. Taylor; H. Hayes 1977-8-19 1505 Butte In Campbell Slough, ca. 3 mi E of jct of Hwys 42 and 162, on N side of Hwy 162. 30 Comment
  CHSC32141  Ambrosia psilostachya Lowell Ahart 1973-11-1 289 Butte On dry deep rich soil, Peter Ahart Ranch, Honcut. 45 Comment
  CHSC33647  Ambrosia psilostachya M. Merryman 1979-9-23 52 Butte SW of Chico along Ord Ferry Rd, ca. 3.7 mi W of Dayton Four Corners, just W of meridian. 35 Comment
  CHSC34120  Ambrosia psilostachya L. Ahart 1981-9-10 3138 Sutter Near the old homestead, S side of South Butte, Sutter Buttes. 450 Comment
  CHSC35783  Ambrosia psilostachya James Henrickson 1972-10-21 8056 Orange Eastern Anaheim, 2 blocks E. of Imperial Hwy along La Palma Ave., just N of Santa Ana River. 60 Comment
  CHSC37116  Ambrosia psilostachya L. Ahart; M. S. Taylor 1982-10-11 3859 Butte Ca. /1 mi SE of HQ, Graylodge Wildlife Refuge, ca. 12 mi SW of Gridley. 35 Comment
  CHSC38320  Ambrosia psilostachya Vernon Oswald 1983-8-27 1033 Butte Upper Bidwell Park, Chico, between the parking areas at Bear Hole and Diversion Dam. 121 Comment
  CHSC40555  Ambrosia psilostachya Lowell Ahart 1985-10-19 5205 Sutter About 1/2 mile south-east of the Dean Cabin, Dean Ranch, Sutter Buttes. 243 Comment
  CHSC45625  Ambrosia psilostachya Vernon Oswald 1987-8-9 3195 Butte Hwy 32 N of Forest Ranch at the 35.0 mi road marker, 3 mi S of Lomo. 1158 Comment
  CHSC46903  Ambrosia psilostachya Lowell Ahart 1981-9-10 3138 Sutter Near the old homestead, on the south side of the South Butte, Sutter Buttes. 426 Comment
  CHSC46904  Ambrosia psilostachya Lowell Ahart 1984-9-22 4804 Sutter West of the homestead, on the west side of the South Butte, Sutter Buttes. 228 Comment
  CHSC59168  Ambrosia psilostachya Vernon H. Oswald 1992-9-29 5226 Tehama Hwy 89 at Bluff Falls, 0.8 mi S of the boundary of Lassen Volcanic National Park. 1972 Comment
  CHSC61395  Ambrosia psilostachya Vernon H. Oswald; Joseph Silveira 1993-8-16 5804 Colusa Refuge located ca. 7 mi S of Willows, center N side of Tract 44, near the S boundary of the refuge. 24 Comment
  CHSC66835  Ambrosia psilostachya Vernon H. Oswald 1996-8-29 8245 Butte Sacramento River National Widlife Refuge, Llano Seco Unit. U.S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. At the southwest corner of Tract 3.4, Sanctuary II. 32 Comment
  CHSC81746  Ambrosia psilostachya Lowell Ahart 2001-11-2 9410 Yuba Camp Far West Reservoir, about 1/8 mile northeast of the dam, about 9 miles (air) southeast of Wheatland. 91 Comment
  CHSC83019  Ambrosia psilostachya Lowell Ahart 2002-10-10 9976 Yuba On the west side of the dirt road, east of the upper part of Englebright Reservoir on the Yuba River, along Rice's Crossing Road, about 2 miles (air) north of Bridgeport, about 18 miles north of Highway 20. 166 Comment
  CHSC84959  Ambrosia psilostachya Lowell Ahart 2003-10-23 10659 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CHSC85444  Ambrosia psilostachya R. D. Fischer 2003-11-16 16 Butte Sierra Nevada foothills between Chico and Forest Ranch on edge of hwy 32 at 10 Mile House Rd, (Greengate). The upper most parking area for accessing upper Bidwell Park. 466 Comment
  CHSC94748  Ambrosia psilostachya Lowell Ahart 2006-9-26 13350 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  CHSC94842  Ambrosia psilostachya Lowell Ahart 2006-10-8 13389 Plumas On the north side of the North Fork of the Feather River, on the south side of Highway 70, about 1/8 mile southwest of Chambers Creek. 622 Comment
  CHSC94986  Ambrosia psilostachya Lowell Ahart 2006-10-31 13518 Colusa About 20 yards northeast of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC97722  Ambrosia psilostachya Lowell Ahart 2007-10-30 14509 Butte On the south side of the water ditch, on the north side of Lower Wyandotte Road, about 2 1/2 miles (air) northeast of Palermo, about 4 1/4 miles (air) southeast of Oroville. 129 Comment
  CHSC97744  Ambrosia psilostachya Lowell Ahart 2007-11-8 14586 Yuba On the south edge of a small island, on the strand of Camp Far West Reservoir, about 1/2 mile south of Rock Creek, about 1/8 mile north of Bear River, about 6 miles (air) northeast of Sheridan. 91 Comment
  CHSC99195  Ambrosia psilostachya John C. Dittes; Rudolph A. Dittes 2006-10-30 1422 Los Angeles South Coast Subregion; undesignated section of El Encino Land Grant; San Fernando Valley; Sepulveda Dam Flood Control Basin; ca. 2.2 air-miles southwest of Van Nuys Civic Center, ca. 0.9 air-mile south of victory Blvd, 0.9 air-mile west of the San Diego Freeway (405), 0.6 air-mile north of the Ventura Freeway (101); next to Apollo Field Model Airport, north bank of the Los Angeles River. 207 Comment
  CLARK-A1528-1532  Ambrosia psilostachya John C. Roos 1938-8-19 San Bernardino Santa Ana River Comment
  CLARK-A1528-1539  Ambrosia psilostachya Alfred R. Roos 1937-11-15 San Bernardino Loma Linda Comment
  CLARK-A1528-1540  Ambrosia psilostachya John C. Roos 1947-7-21 Los Angeles Lancaster Comment
  CLARK-A1528-1541  Ambrosia psilostachya John C. Roos 1937-8-17 1218 Riverside Hemet Comment
  CLARK-A1528-1542  Ambrosia psilostachya John C. Roos 1941-2-17 Los Angeles Westwood Comment
  HSC101350  Ambrosia psilostachya R. G. Swinney 2008-11-7 9760 San Bernardino San Bernardino Valley: Glen Helen Regional Park, marsh to the west of the fishing lakes 610 Comment
  HSC79072  Ambrosia psilostachya G. K. Helmkamp 1983-10-8 - 18 San Bernardino TNC Big Morongo Preserve, S of town of Morongo Valley in Big Morongo Canyon, beside the pipeline road in the middle of the TNC owned area. 762 Comment
  HSC80290  Ambrosia psilostachya Steve Boyd 1985-8-7 1104 Riverside Santa Rosa Plateau Region, NW base of Redona Mesa on Tenaja Rd., 0.8 mi.. east of junction with 8S01 and 8S02 Comment
  IRVC26148  Ambrosia psilostachya S. D. White 1992-9-29 846 Orange Vicinity of City of Brea, immediately N of Carbon Canyon Road and E of Placentia Avenue, ± 1 mi (airline) S/SE of Tonner Canyon. southern coastal 183 Comment
  IRVC26498  Ambrosia psilostachya Peter A. Bowler 2003-9-13 s.n. San Bernardino UC Burns Pinyon Ridge Reserve, ca. 1.5 miles E of Pioneertown, E of Burns' House. Little San Bernardino Mountains 1265 Comment
  IRVC28690  Ambrosia psilostachya A. C. Sanders, Mark Elvin, Cathleen Weigand 2002-7-30 25475 Los Angeles Newhall Ranch, Potrero Canyon just above old ranch buildings and corrals NE end of Santa Susana Mtns. 335 Comment
  IRVC28761  Ambrosia psilostachya A. C. Sanders, Mark Elvin, Cathleen Weigand 2002-8-1 25546 Los Angeles Newhall Ranch, canyon on south side of central Potrero Canyon, SSW of old ranch headquarters NE end of Santa Susana Mtns. 396 Comment
  IRVC29178  Ambrosia psilostachya A. C. Sanders, Lee Jones 2004-11-7 29024 Los Angeles site called Lookout Gates on topo, 1 mile NE of Chatsworth at foot of Santa Susana Mtns., 5 acre estate proposed for conversion to private high school (Sierra Canyon H.S.), west of the north end of Lurline Ave, N of Nashville St., just south of 118 Fwy San Fernando Valley 351 Comment
  IRVC29814  Ambrosia psilostachya Laura D. Lyons, Mark A. Elvin 2006-9-23 428 Orange San Joaquin Marsh Freshwater Marsh, UC Natural Reserve; SW edge, along San Diego Creek, N of University Drive, E Hwy 73. Southern Coastal 2 Comment
  JEPS102572  Ambrosia psilostachya Lowell Ahart 2001-11-2 9410 Yuba Camp Far West Reservoir, about 1/8 mile NE of the dam, about 9 miles (air) SE of Wheatland. 91 Comment
  JEPS103445  Ambrosia psilostachya Lowell Ahart 2002-10-10 9976 Yuba On the W side of the dirt road, E of the upper part of Englebright Reservoir on the Yuba River, along Rice's Crossing Road, ca 2 miles (air) N of Bridgeport, ca 18 miles N of Highway 20. 166 Comment
  JEPS104399  Ambrosia psilostachya Lowell Ahart 2003-10-23 10659 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  JEPS108783  Ambrosia psilostachya Lowell Ahart 2006-9-26 13350 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  JEPS108986  Ambrosia psilostachya Lowell Ahart 2006-10-8 13389 Plumas On the north side of the North Fork of the Feather River, on the south side of Highway 70, about 1/8 mile southwest of Chambers Creek 622 Comment
  JEPS110533  Ambrosia psilostachya Lowell Ahart 2006-10-31 13518 Colusa About 20 yards northeast of the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS111648  Ambrosia psilostachya A. G. Murdock 2003-9-12 180 Solano Mare Island Near road along marsh 5 Comment
  JEPS111685  Ambrosia psilostachya D. G. Kelch 2003-8-17 03 .146 Solano Southampton Marsh 2 Comment
  JEPS115013  Ambrosia psilostachya Lowell Ahart 2007-11-8 14586 Yuba On the south edge of a small island, on the strand of Camp Far West Reservoir, about 1/2 mile south of Rock Creek, about 1/8 mile north of Bear River, about 6 miles (air) northeast of Sheridan 91 Comment
  JEPS115043  Ambrosia psilostachya Lowell Ahart 2007-10-30 14509 Butte On the south side of the water ditch, on the north side of Lower Wyandotte Road, about 2 1/2 miles (air) northeast of Palermo, about 4 1/4 miles (air) southeast of Oroville 129 Comment
  JEPS115265  Ambrosia psilostachya Lowell Ahart, John Dittes, Josephine Guardino 2008-11-8 15438 Butte On the south bank of Lindo Channel, about 50 yards west of the diversion structure, north of Hooker Oak, Upper Bidwell Park, Chico 68 Comment
  JEPS117527  Ambrosia psilostachya Lowell Ahart 2010-9-13 17152 Butte Open dry areas, Oroville Wildlife Area, about 1/2 mile west of Pacific Heights Road, about 3 1/2 miles (air) northwest of Palermo 31 Comment
  JEPS120632  Ambrosia psilostachya Lowell Ahart 2013-10-22 19204 Glenn Above the high water line of Stony Gorge Reservoir, about 2.5 miles south of the dam, about 17 air miles northwest of Willows. Comment
  JEPS120814  Ambrosia psilostachya Lowell Ahart 2013-8-8 19016 Glenn North end of Grizzly flat, strand of Black Butter Reservoir, about 9 air miles W of Orland. Comment
  JEPS124126  Ambrosia psilostachya Lowell Ahart 2015-10-9 20539 Butte About 100 yards south of Ten Mile House Road, about 10 miles northeast of Chico. Comment
  JEPS127141  Ambrosia psilostachya Lowell Ahart, John Dittes 2016-8-25 21304 Tehama Anderson River Park, 0.7 mile (air) upstream from Stillwater Creek Confluence, 1.8 miles (air) northeast of Balls Ferry Road exit from Interstate 5 in Anderson. Undesignated Section of San Buenaventura Land Grant. Comment
  JEPS19507  Ambrosia psilostachya Peter H. Raven 1957-9-21 11352 Los Angeles Monte Nido Fire Station; Santa Monica Mountains Comment
  JEPS28897  Ambrosia psilostachya E. R. 1934-10-28 9146 Tulare near Strathmore; Poplar District Comment
  JEPS30522  Ambrosia psilostachya Peter H. Raven and Henry J. Thompson 1959-10-18 14674 Los Angeles north arm, near mouth of Malibu Creek Malibu Lake; Santa Monica Mountains, Malibu Creek 220 Comment
  JEPS30654  Ambrosia psilostachya Peter H. Raven and Henry J. Thompson 1958-9-28 13730 Los Angeles Elysian Park; Santa Monica Mountains 198 Comment
  JEPS30667  Ambrosia psilostachya Peter H. Raven and Henry J. Thompson 1959-9-18 14430 Los Angeles west, Santa Monica Boulevard near Beverly Glen Boulevard Los Angeles; Santa Monica Mountains 76 Comment
  JEPS30671  Ambrosia psilostachya Peter H. Raven and Henry J. Thompson 1959-9-6 14381 Los Angeles mouth of Malibu Creek; Santa Monica Mountains, Malibu Creek 12 Comment
  JEPS30694  Ambrosia psilostachya Peter H. Raven 1961-9-24 16739 San Bernardino just east of Victorville; Mojave River 609 Comment
  JEPS31052  Ambrosia psilostachya Ernest C. Twisselmann 1959-11-2 5887 San Luis Obispo Shandon; Oso Flaco Lake Comment
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Sep 15 2014
  JEPS41024  Ambrosia psilostachya W. L. Jepson 1940-11-19 20249 Solano Peaceful Glen; Sweeney Creek 45 Comment
  JEPS41025  Ambrosia psilostachya W. L. Jepson 1940-10-6 20179 Orange Horseshoe Bend; Santa Ana River Canon Comment
  JEPS41029  Ambrosia psilostachya W. L. Jepson 1928-8-18 13310 Tulare Exeter Comment
  JEPS41030  Ambrosia psilostachya W. L. Jepson 1923-9-27 10208 Solano Suisun Comment
  JEPS41031  Ambrosia psilostachya L. M. Booth 1932-8-5 1355 Orange Bolsa Creek Comment
  JEPS41032  Ambrosia psilostachya Carl V. Meyer 1928-8-8 San Diego Escondido Comment
  JEPS41034  Ambrosia psilostachya S. B. and W. F. Parish 1882-9-1 San Bernardino San Bernardino Valley Comment
  JEPS41035  Ambrosia psilostachya J. Thomas Howell 1927-9-24 3121 Orange at, Santa Ana River bottom Rancho Santa Ana; Santa Ana River 152 Comment
  JEPS41036  Ambrosia psilostachya Elizabeth Day Palmer 1908-8-7 Los Angeles Los Angeles Comment
  JEPS41038  Ambrosia psilostachya J. P. Harrington August, 1932 Orange San Juan Capistrano Comment
  JEPS41039  Ambrosia psilostachya S. B. Parish 1892-9-1 San Bernardino San Bernardino Valley Comment
  JEPS41040  Ambrosia psilostachya W. L. Jepson 1893-10-5 Sacramento Andrus Island; Lower Sacramento Comment
  JEPS41102  Ambrosia psilostachya W. L. Jepson 1942-10-20 20742 Solano Vacaville Comment
  JEPS55240  Ambrosia psilostachya Lewis S. Rose 1966-12-24 66115 Los Angeles Westwood Village 121 Comment
  JEPS6087  Ambrosia psilostachya V. F. Hesse 1953-10-6 1218 Santa Cruz Woods Lagoon; Santa Cruz 3 Comment
  JEPS78610  Ambrosia psilostachya Walter Knight, L. R. Heckard and Bert Johnson 1978-9-28 3300 Contra Costa South landing Browns Island Comment
  JEPS89498  Ambrosia psilostachya Dean W. Taylor 1989-8-6 10510 Colusa s.w. margin Delevan Nat'l Wildlife Refuge; Sacramento Valley, Delevan Nat'l Wildlife Refuge Comment
  JEPS98996  Ambrosia psilostachya Lowell Ahart 2001-11-2 9410 Yuba Camp Far West Reservoir, about 1/8 mile NE of the dam, about 9 miles (air) SE of Wheatland. 91 Comment
  LA200150  Ambrosia psilostachya Jonathan Sauer; D. Bradbury, A. Lang 1969-9-25 4619 Ventura Santa Monica Mountains, Big Sycamore Canyon, mouth of canyon Comment
  LA201371  Ambrosia psilostachya Arthur C. Gibson; 2001-7-25 4144 Ventura Comment
  LA201524  Ambrosia psilostachya Arthur C. Gibson; 2003-8-11 4882 Los Angeles 7 Comment
  LA211644  Ambrosia psilostachya Mark A. Elvin; 2014-11-5 7823 Ventura Ventura coastal basin, McGrath State Beach, Dunes south of the mouth of Santa Clara River, 200-300 meters from Pacific Ocean. 4.0 Comment
  LA31630  Ambrosia psilostachya Peter H. Raven; Henry J. Thompson 1958-9-28 Los Angeles Elysian Park 198 Comment
  LA31631  Ambrosia psilostachya Peter H. Raven; Henry J. Thompson 1959-9-6 14381 Los Angeles SANTA MONICA MOUNTAINS, Malibu Creek, near mouth. 12 Comment
  LA31632  Ambrosia psilostachya Peter H. Raven; Henry J. Thompson 1959-9-18 Los Angeles West Los Angeles, along railroad tracks, Santa Monica Boulevard near Beverly Glen Boulevard 76 Comment
  LA31646  Ambrosia psilostachya Peter H. Raven; 1959-11-7 14733 Los Angeles 182 Comment
  LA88351  Ambrosia psilostachya O. H. Kappler; 1942-11-1 352 Los Angeles Santa Monica Mountains, W-fork Las Trancas (Rattlesnake) Canyon, N slope 365 Comment
  LA91057  Ambrosia psilostachya T. A. Geissman; 1970-8-14 TAG 14870 MD Los Angeles Santa Monica Mountains, Mulholland Dr. at San Diego Frwy 365 Comment
  LA91068  Ambrosia psilostachya T. A. Geissman; October 1969 TAG 101068 AP Los Angeles SANTA MONICA MOUNTAINS, Malibu Creek, near mouth. 12 Comment
  LA91071  Ambrosia psilostachya T. A. Geissman; October 1969 TAG 101068 AP Los Angeles Santa Monica Mountains, Malibu Creek Comment
  LA91072  Ambrosia psilostachya T. A. Geissman; October 1969 TAG 161068 APL Ventura Santa Monica Mountains, Hidden Valley, Lake Sherwood, along roadside on W-end of lake 292 Comment
  LA91097  Ambrosia psilostachya T. A. Geissman; October 1969 TAG 161068 APL Ventura Santa Monica Mountains, Hidden Valley, Lake Sherwood, along roadside on W-end of lake 292 Comment
  LA91102  Ambrosia psilostachya T. A. Geissman; 1970-8-14 TAG 14870 MD Los Angeles Santa Monica Mountains, Mulholland Dr. at San Diego Frwy 365 Comment
  LA91103  Ambrosia psilostachya T. A. Geissman; 1970-8-14 TAG 14870 MD Los Angeles Santa Monica Mountains, Mulholland Dr. at San Diego Frwy 365 Comment
  LA94829  Ambrosia psilostachya T. A. Geissman; 1968-4-20 TAG 42068 APM Los Angeles Santa Monica Mountains, Malibu Canyon, near entrance to canyon 9 Comment
  LA94830  Ambrosia psilostachya T. A. Geissman; 1968-4-20 TAG 42068 APM Los Angeles Santa Monica Mountains, Malibu Canyon, near entrance to canyon Comment
  OBI17094  Ambrosia psilostachya Robert F. Hoover 1966-9-16 10040 San Luis Obispo 3 mi N of Santa Margarita Comment
  OBI17097  Ambrosia psilostachya Betty Sheehan 1957-11-1 36 San Luis Obispo Cal Poly campus, science bldg Comment
  OBI17098  Ambrosia psilostachya Lewis S. Rose 1966-12-24 66115 Los Angeles Westwood Village 122 Comment
  OBI23032  Ambrosia psilostachya David J. Keil 1979-10-27 13655 San Luis Obispo E end of Lopez Lake below confluence of Arroyo Grande Crk and Phoenix crk, 0.2 mi from jctn of Lopez Cyn Rd and Pozo Rd Comment
  OBI25845  Ambrosia psilostachya David J. Keil 1977-8-21 12516 San Luis Obispo Ca. 3 mi W of Cuesta College along Calif Rte 1 along Chorro Crk Comment
  OBI34692  Ambrosia psilostachya David J. Keil, Eric Wise 1983-8-30 17889 San Luis Obispo Black Lake Cyn, S of Arroyo Grande Comment
  OBI37559  Ambrosia psilostachya Steve Boyd 1985-8-7 1104 Riverside Santa Rosa Plateau region, NW base of Redonda mesa on Tenaja Rd, 0.8 mi E ofjtn with 8S01 and 8S02 Comment
  OBI51419  Ambrosia psilostachya Larry Kelly, David J. Keil 1988-10-1 254 San Luis Obispo Pismo marsh between Pismo State Beach campground and Grand Ave Comment
  OBI59258  Ambrosia psilostachya David J. Keil, with Lawrence M. Kelly, Kathryn Bay, and Frieda Wertman 1988-11-12 21196 San Luis Obispo Near summit along California Route 227 between San Luis Obispo and Arroyo Grande. 213 Comment
  OBI59690  Ambrosia psilostachya Larry Kelly, David J. Keil 1988-10-1 254 San Luis Obispo Pismo marsh between Pismo State Beach campground and Grand Ave Comment
  OBI62605  Ambrosia psilostachya David J. Keil 1997-8-26 26404 Santa Barbara South Base. Near mouth of Canada de Jolloru at Sudden. Comment
  OBI66320  Ambrosia psilostachya David J. Keil 1991-10-26 22677 Santa Barbara Vandenberg Air Force base, North base. barka slough, near eastern boundary of base along san antonio creek. areas of freshwater marsh, riparian woodland, and salt-marsh meadow. Comment
  OBI66331  Ambrosia psilostachya David J. Keil, with V. L. Holland 1995-10-27 25751 Santa Barbara North base. north side of barka slough at eastern base boundary. Comment
  OBI73267  Ambrosia psilostachya Michael Walgren 2010-9-26 185 San Luis Obispo San Simeon State Park on a low bluff above the beach at Broken Bridge Crk, W of San Simeon Point Comment
  OBI74970  Ambrosia psilostachya David J. Keil, with Lynne Dee Oyler 1990-9-28 21484 Santa Barbara San Luis Obispo-Santa Barbara County line area west of Guadalupe. From west end of West Main Street eastward along channel of Santa Maria River. Comment
  OBI77740  Ambrosia psilostachya Julie M. Vanderwier 1979-8-17 s.n. San Luis Obispo Indian Knob Tar Sands Comment
  OBI77811  Ambrosia psilostachya Matt Falconer 1993-6-8 s.n. Santa Barbara Vandenberg AFB. W and S of 13th St Bridge over the Santa Ynez River Comment
  OBI78661  Ambrosia psilostachya Teresa Lynn Sachacherer 2013-11-11 1 San Luis Obispo South-west end of Aloha Pl. Oceano, CA. Located at the end of a red bridge 300 ft south along trail located at the end of Aloha Pl. On north side of protected lagoon from the ocean 3 Comment
  OBI79022  Ambrosia psilostachya David J. Keil 2013-8-19 31881 San Luis Obispo Northeastern quadrant of intersection of Turri Road with South Bay Blvd. 11 Comment
  OBI80473  Ambrosia psilostachya David J. Keil 1992-8-3 23615 San Luis Obispo Laguna Lake Park. 170 Comment
  OBI80829  Ambrosia psilostachya David J. Keil 1992-1 22953 San Luis Obispo Laguna Lake City Park. Along Madonna road in grassy strip with lawn 170 Comment
  POM10072  Ambrosia psilostachya Charlotte M. Wilder 1904-6-20 858 San Bernardino Wilders Canyon, Jurupa Hills. Comment
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Nov 13 2016
  POM10073  Ambrosia psilostachya Charlotte M. Wilder 1904-7-14 358 Riverside Jurupa Hills, Wilders Canyon. Comment
  POM10301  Ambrosia psilostachya Anonymous 1903-10-19 385 Riverside Old stewart Ranch. West Riverside Comment
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Apr 7 2011
  POM122758  Ambrosia psilostachya Marcus E. Jones 1924-8-26 s.n. Orange Newport. Comment
  POM155780  Ambrosia psilostachya M. B. Dunkle 1928-10-7 1997 Los Angeles Middle Ranch Canyon, Santa Catalina Island. 152 Comment
  POM158109  Ambrosia psilostachya L. R. Abrams 1902-8-18 2957 Los Angeles Ballona Creek, near Mesmer Comment
  POM187700  Ambrosia psilostachya Joseph A. Ewan 1931-10-24 5267 Los Angeles N shore Malibu Lake. Comment
  POM201785  Ambrosia psilostachya L. M. Booth 1932-7-19 1277 Orange Bolsas Marsh. Comment
  POM202607  Ambrosia psilostachya L. M. Booth 1932-8-5 1355 Orange Bolsas Marsh. Comment
  POM246654  Ambrosia psilostachya E. C. Jaeger 1938-10-30 s.n. Riverside Mecca. -30 Comment
  POM246655  Ambrosia psilostachya E. C. Jaeger 1938-10-30 s.n. Riverside Mecca. -30 Comment
  POM249858  Ambrosia psilostachya E. C. Jaeger 1938-10-30 s.n. Riverside Mecca. -30 Comment
  POM294281  Ambrosia psilostachya Lyman Benson 1945-10-8 11881 San Bernardino Bed of Mojave River, 1 mile above Victorville. 762 Comment
  POM310580  Ambrosia psilostachya Hulda Crooks 1945-10-8 42 San Bernardino Victorville 915 Comment
  POM318866  Ambrosia psilostachya Patricia Wilder 1970-10-30 4835 Riverside Road on south side of Prado Flood Control Basin on east side of Prado Dam. About 1/2 mile east of dam tender's residence. Santa Ana River Drainage Area. East of Chino Hills. 152 Comment
  POM319666  Ambrosia psilostachya Patricia Wilder 1970-10-15 4769 Riverside Prado Dam at base of dam in Prado Flood Control Basin. East of Chino Hills. 152 Comment
  POM4801  Ambrosia psilostachya N. R. Shaw 1900-6-3 57 Los Angeles Claremont. Comment
  POM48688  Ambrosia psilostachya Mary F. Spencer 1916-8-24 292 San Diego Waysides, Pine Hills. Comment
  POM50992  Ambrosia psilostachya Roxana Stinchfield 1916-7-8 376 Colusa Truck garden Stinchfield Ranch - Sycamore Slough. Comment
  POM87791  Ambrosia psilostachya L. R. Abrams 1902-9-21 2992 San Mateo Crystal Lake between the Mts. Comment
  RSA0015054  Ambrosia psilostachya Justin M. Wood, D. M. Ray 2010-9-13 2689 San Bernardino Clark's Ranch, accessed via Seven Pines Road. 1480 Comment
  RSA0035895  Ambrosia psilostachya R. G. Swinney 2009-9-3 11568 San Bernardino Transverse Range; San Gabriel Mountains: Lost Lake (San Andreas Fault sag pond), east end of Lone Pine Valley. 851 Comment
  RSA0042768  Ambrosia psilostachya Fred M. Roberts 2012-7-18 7679 Orange San Joaquin Hills: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus of Poppy Street and 2.1 km WNW summit of Pelican Hill. 37 Comment
  RSA0060265  Ambrosia psilostachya LeRoy Gross, Duncan S. Bell, Nick J. Jensen 2015-3-17 6742 Ventura Ormond Beach at end of McWane Blvd., west of Arcturus Ave. South of Port Hueneme, Oxnard. 3 Comment
  RSA0080987  Ambrosia psilostachya Sarah J. De Groot, Noravit Chumchim 2015-7-23 7500 Ventura The Nature Conservancy Villanueva property; Santa Clara River drainage and slopes of South Mountain south-southwest of Santa Paula. Next to old water tank, along old road at northwest base of South Mountain. 95 Comment
  RSA0081738  Ambrosia psilostachya Sarah J. De Groot, John Woodruff, Sandra Llamas 2015-8-6 7544 Ventura The Nature Conservancy Ormond Beach property; just south of Port Hueneme and Oxnard, south of Naval CBC Port Hueneme. 2 Comment
  RSA0087408  Ambrosia psilostachya Sarah J. De Groot, Noravit Chumchim 2015-7-15 7476 Ventura The Nature Conservancy Banman (Prairie Pacific) Property. Santa Clara River floodplain east-southeast of Santa Paula, east of South Mountain Road, northwest of South Mountain, south of Sulphur Mountain/Santa Paula Ridge,, south of Highway 126. Oak Ridge Fault zone. 82 Comment
  RSA0094099  Ambrosia psilostachya Duncan S. Bell, Sarah DeGroot, Amy Rouillard 2015-10-21 8725 San Diego McCain Valley; top end of the valley, about 1.75 air miles north of the Cottonwood Campground. 1335 Comment
  RSA0112564  Ambrosia psilostachya Lowell A. Ahart 2013-8-8 19016 Glenn North end of Grizzly Flat, strand of Black Butte Reservoir, about 9 miles (air) west of Orland. 132 Comment
  RSA0113938  Ambrosia psilostachya LeRoy Gross, Sarah J. De Groot 2016-8-24 7571 Ventura Vulcan Property. End of Torex/Main Road, Piru. South of Highway 126. Started near 34.39767N 118.79458W. Survey up river to 34.40147N 118.75117. 183 Comment
  RSA0113983  Ambrosia psilostachya LeRoy Gross, Sarah J. De Groot 2016-8-25 7629 Ventura Hanson/Villanueva Properties. South, southeast of Highway 126 and Briggs Road. Between Santa Paula and Saticoy. Started near 34.32102N 119.09072W, ended near 34.30517N 119.10191. 54 Comment
  RSA0116756  Ambrosia psilostachya R. G. Swinney 2010-10-5 13967 Los Angeles San Gabriel Mountains; Placerita Cyn., Placerita Canyon Natural Area, 50-300 meters west of Nature Center. 463 Comment
  RSA151166  Ambrosia psilostachya Peter H. Raven 1961-9-24 16739 San Bernardino Along Mojave River just east of Victorville 610 Comment
  RSA180511  Ambrosia psilostachya E. W. Lathrop 1960-6-6 4832 Riverside 14 miles W. of Murrieta. Comment
  RSA184158  Ambrosia psilostachya I. L. Wiggins 1965-10-27 20304 Orange Roadside and along creek bank, just SW of Los Angeles Co. line, on Brea Canyon Rd. Comment
  RSA184357  Ambrosia psilostachya S. F. Blake 1910-7-26 474 Los Angeles Dry bank, near Pasadena Comment
  RSA187661  Ambrosia psilostachya R. F. Thorne 1966-9-14 36672 Los Angeles Santa Catalina Island. Where Isthmus road crosses Cottonwood Creek 30 Comment
  RSA189413  Ambrosia psilostachya L. S. Rose 1966-12-24 66115 Los Angeles Westwood Village. 122 Comment
  RSA234509  Ambrosia psilostachya James Henrickson 1970-7-25 5045 Orange 2.5 miles NE of Huntington beach, 1 mile SE of Warner Ave. on sandy slope of E. Pacific Coast Hwy. at border of Bolsa Chica Salt Marsh. 0 Comment
  RSA301945  Ambrosia psilostachya J. R. Shevock 1972-9-16 2276 Los Angeles Point Dume 6 Comment
  RSA301946  Ambrosia psilostachya J. R. Shevock 1972-9-16 2264 Los Angeles N-1 Rd. Malibu Canyon. 305 Comment
  RSA315167  Ambrosia psilostachya R. F. Thorne, Kay Wright, R. K. Benjamin, J. Herrick 1982-9-3 55254 San Bernardino San Bernardino Mountains: Cushenbury Springs, lower end of Cushenbury Canyon. 1220 Comment
  RSA335036  Ambrosia psilostachya Steve Boyd 1985-8-7 1104 Riverside Santa Rosa Plateau Region, NW base of Redonda Mesa on Tenaja Road, 0.8 mile east of jct with 8S01 and 8S02. Comment
  RSA33662  Ambrosia psilostachya N. C. Cooper 1943-10-9 963 Riverside Hemet. 305 Comment
  RSA33797  Ambrosia psilostachya N. C. Cooper 1942-11-9 882 Orange Balboa. Comment
  RSA388418  Ambrosia psilostachya R. F. Thorne, Steve Boyd, Earl W. Lathrop 1985-7-18 61194 Riverside Santa Rosa Plateau, Nature Conservancy Reserve: along Cole Canyon. 535 Comment
  RSA416986  Ambrosia psilostachya M. B. Dunkle 1930-7-23 2439 Los Angeles Little Harbor, Santa Catalina Island. Comment
  RSA416987  Ambrosia psilostachya Wm. Martin 1971-8-11 s.n. Los Angeles Along drainage of Malibu Creek, vicinity of Tapia Park. Comment
  RSA416989  Ambrosia psilostachya Blanche Trask 1902-08 s.n. Los Angeles Avalon, Catalina Island. Comment
  RSA416992  Ambrosia psilostachya Joseph A. Ewan 1931-7-31 4765 Orange Smeltzer. Choking irrigation ditch Comment
  RSA416993  Ambrosia psilostachya F. R. Fosberg 1930-11-17 S- 4194 San Bernardino 3 Miles SE of Chino. 250 Comment
  RSA416994  Ambrosia psilostachya L. C. Wheeler 1931-9-7 98 San Bernardino Burcham Ranch, west fork Mojave River. 976 Comment
  RSA416995  Ambrosia psilostachya F. R. Fosberg 1931-8-17 7310 San Diego Alpine. 600 Comment
  RSA416996  Ambrosia psilostachya F. R. Fosberg 1931-8-17 7364 San Diego Cuyamaca Lake. 1120 Comment
  RSA416997  Ambrosia psilostachya F. R. Fosberg 1930-10-26 S- 4169 San Diego Coches Creek, 2 miles east Bostonia. 200 Comment
  RSA416999  Ambrosia psilostachya J. Patman 1963-8-22 1158 Santa Barbara Border of Sandyland Slough, west of Carpinteria. Comment
  RSA417001  Ambrosia psilostachya H. M. Pollard 1968-8-30 s.n. Ventura Waste Ground between Ventura Ave. and Southern Pacific Railroad near Wadstrom, Ventura Oil Fields Comment
  RSA417002  Ambrosia psilostachya H. M. Pollard 1969-10-10 s.n. Ventura Southern Pacific R.R. near Nitroshell, Ventura Oil Fields. Comment
  RSA425024  Ambrosia psilostachya A. R. Roos 1937-11-15 s.n. San Bernardino Loma Linda Comment
  RSA522112  Ambrosia psilostachya Steve Boyd, Timothy S. Ross 1989-8-28 3805 Riverside Vail Lake area, Temecula Creek at confluence with lake and adjacent sedimentary hills to the east. 442 Comment
  RSA554461  Ambrosia psilostachya Steve Myers 1991-9-7 91 -67 San Bernardino Near Victorville; Mojave Narrows Regional Park; near the Mojave River Comment
  RSA561514  Ambrosia psilostachya Steve Boyd, Timothy S. Ross, David E. Bramlet 1992-9-9 7659 Riverside Southern Santa Ana Mountains, San Mateo Canyon Wilderness Area. Upper San Mateo Canyon, from the junction of Tenaja Road (7S01) and Los Almos Road (7S04) and the confluence of Los Almos Creek., Up the San Mateo Trail north to Potrero de la Cienega. 396 Comment
  RSA575845  Ambrosia psilostachya Steve Boyd 1982-11-2 s.n. Riverside Gavilan Hills region, Temescal Canyon at the confluence of Estelle Creek and Temescal Creek, at the northern end of the entrenched meander of Temescal Creek at the western base of Estelle Mountain. 329 Comment
  RSA575931  Ambrosia psilostachya Steve Boyd 1994-10-14 8392 Riverside Southern Santa Ana Mts., San Mateo Canyon Wilderness Area of the Cleveland Nat'l Forest. San Mateo Canyon, sandy benches in canyon bottoms at the confluence with Bluewater Canyon. 329 Comment
  RSA588826  Ambrosia psilostachya Darin L. Banks, Steve Boyd 1995-10-17 0778 Riverside NW Palomar Mountains; Agua Tibia Mountains; Cleveland National Forest, Agua Tibia Wilderness Area; Along lower Arroyo Seco, S of the Dripping Springs Campground. Along the broad alluvial benches N of where Arroyo Seco turns to the E. 512 Comment
  RSA594342  Ambrosia psilostachya Steve Boyd, Lauren Raz 1996-10-14 9027 Los Angeles Liebre Mountains region, Agua Dulce Canyon, just north of Highway 14 and the confluence with Escondido Canyon, along Agua Dulce Canyon Road. 671 Comment
  RSA594933  Ambrosia psilostachya Steve Boyd, Lauren Raz 1996-10-8 8999 Los Angeles Liebre Mountains region, Bouquet Canyon ca. 1.7 miles south of junction with Forest Service Road 6N08. 561 Comment
  RSA596466  Ambrosia psilostachya Lauren Raz, Steve Boyd 1996-10-23 004 Los Angeles Liebre Mountains. Entrance to Ruby Canyon on Forest Service Road 6N24 ca. 1/10 mile from junction with Lake Hughes Road 609 Comment
  RSA596655  Ambrosia psilostachya Darin L. Banks, Michael Wall 1996-11-12 1235 San Diego NW Palomar Mountains; Agua Tibia Mountains; Cleveland National Forest, E of Agua Tibia Wilderness Area; Eastern Cutca Valley, along the area were the Cutca Trail and Cutca Road meet and crosses the upper drainages of Long Canyon. 1040 Comment
  RSA596656  Ambrosia psilostachya Darin L. Banks, Michael Wall 1996-11-12 1235 San Diego NW Palomar Mountains; Agua Tibia Mountains; Cleveland National Forest, E of Agua Tibia Wilderness Area; Eastern Cutca Valley, along the area were the Cutca Trail and Cutca Road meet and crosses the upper drainages of Long Canyon. 1040 Comment
  RSA596675  Ambrosia psilostachya Darin L. Banks, Lauren Raz 1996-11-5 1184 Riverside NW Palomar Mountains; Agua Tibia Mountains; Pechanga Indian Reservation, S of San Gabriel Church; Along a newly established firebreak along a NW-SE running ridgeline, near the water tank. 402 Comment
  RSA596706  Ambrosia psilostachya Steve Boyd, Lauren Raz 1996-9-24 8926 Los Angeles Liebre Mountains, Knapp Ranch area at upper end of Castaic Creek drainage in broad alluvial valley at head of Cienaga Canyon, south of Liebre Mountain. 915 Comment
  RSA599016  Ambrosia psilostachya L. C. Wheeler 1967-11-4 s.n. San Bernardino San Sevaine Cow Camp. 1448 Comment
  RSA6000  Ambrosia psilostachya C. B. Wolf 1932-10-5 4241 Los Angeles Santa Catalina Island. In ravine at junction of Isthmus road and road to Black Jack Peak. 244 Comment
  RSA607701  Ambrosia psilostachya Scott D. White 1997-11-5 6019 Los Angeles Mouth of Trancas Canyon, N of Pacific Coast Hwy (= CA Hwy 1). 8 Comment
  RSA613617  Ambrosia psilostachya E. R. Blakley 1962-10-5 5447 Los Angeles Santa Catalina Island. Cottonwood Canyon 0.25 mile upstream from the ocean 30 Comment
  RSA626233  Ambrosia psilostachya L. C. Wheeler 1966-10-1 8929 Los Angeles San Gabriel Mountains: Big Tujunga Canyon at Colby Ranch Road. 960 Comment
  RSA640500  Ambrosia psilostachya L. C. Wheeler 1967-9-16 10814 San Bernardino Lone Pine Canyon 1036 Comment
  RSA643319  Ambrosia psilostachya R. D. Goeden, D. W. Ricker 1969-2-11 s.n. San Diego Coastal Plain: Miramar. Site AP-69-10 137 Comment
  RSA643615  Ambrosia psilostachya Jon P. Rebman, Annette Winner, Oscar Solis 1999-8-10 5987 San Diego North Park area of the city of San Diego; canyon just south of Juniper ST. between 33rd St. and Commonwealth Ave. 140 Comment
  RSA650434  Ambrosia psilostachya Marion P. Harthill 1975-11-8 s.n. San Diego San Luis Rey Cr. 609 Comment
  RSA650435  Ambrosia psilostachya Marion P. Harthill 1975-11-8 s.n. San Diego San Luis Rey Cr. 609 Comment
  RSA651538  Ambrosia psilostachya Marion P. Harthill 1975-11-8 s.n. San Diego San Luis Rey Cr. 609 Comment
  RSA653031  Ambrosia psilostachya Mitch Provance 2000-5-5 2132 San Bernardino W La Loma Hills: Colton, S Pellisier Rd., ca. 0.5 km N of the corner of W Center St. and Orange St. 274 Comment
  RSA680502  Ambrosia psilostachya Sarah J. De Groot 2001-8-13 147 San Diego Hidden Meadows 92026. Comment
  RSA683308  Ambrosia psilostachya Sarah J. De Groot 2002-6-23 772 San Diego Water road, Cerveza Dr. & Faircrest, Hidden Meadows 92026. Comment
  RSA696742  Ambrosia psilostachya Anonymous 1928-11-11 375 San Diego Warner's Hot Springs. Comment
  RSA696744  Ambrosia psilostachya Anonymous 1934-09 s.n. Orange [Unspecified] Comment
  RSA699677  Ambrosia psilostachya Keith E. Hoffmaster 1927-6-30 s.n. San Diego San Onofre Comment
  RSA701670  Ambrosia psilostachya Jon P. Rebman, Jeannie Gregory, Jim Rocks 2003-7-15 9353 San Diego Laguna Mountains: Lucky 5 Ranch; southern portion of new acquisition by California State Parks: west side of Sunrise Hwy (S-1) between Cuyamaca Lake and Mount Laguna. 1657 Comment
  RSA703089  Ambrosia psilostachya Fred M. Roberts, Arthur Davenport 2003-9-11 6005 Orange Rancho Mission Viejo: Donna O' Neill Land Conservancy. Cristianitos Cyn., 0.79 km N Sycamore Gate 0.23 km w of Crisianitos Road. 126 Comment
  RSA704398  Ambrosia psilostachya Jon P. Rebman, J. Gregory, Parabotany team 2004-8-20 10659 San Diego Lake Sutherland: north of Hwy. 78 between Ramona and Santa Ysabel; dry lakebed at southeast end of lake. 605 Comment
  RSA705585  Ambrosia psilostachya Jon P. Rebman, J. Gregory, J. Rocks, J. deWitt 2004-8-10 10612 San Diego Sycuan Peak Ecological Reserve (California Dept. of Fish and Game): southeast of Dehesa, southwest of Loveland Reservoir; on the lower north side of Sycuan Peak, at the end Sloan Canyon Road at the entrance gate to the reserve. 250 Comment
  RSA709472  Ambrosia psilostachya A. C. Sanders, Kerry Knudsen 2004-10-15 28879 San Diego South Coast: San Elijo Lagoon Ecological Reserve (DGF), north end of Santa Helena Dr., 0.5 mi. west of El Camino Real, south of upper end of lagoon. 12 Comment
  RSA710668  Ambrosia psilostachya Larry Hendrickson, Kim Marsden 2003-10-17 201 San Diego Anza-Borrego Desert State Park, SentenacCienega just south of State Highway 78 and east of county road S-2. Comment
  RSA717318  Ambrosia psilostachya A. C. Sanders, Kerry Knudsen 2004-7-2 28451 San Diego Peninsular Range: Boden Canyon, tributary of Santa Ysabel Creek at E end of San Pasqual Valley; around pond in middle DFG parcel. 320 Comment
  RSA718532  Ambrosia psilostachya L. Ahart 2006-10-31 13518 Colusa 20 yards northeast of the bridge across Stony creek, just north of Stonyford. 348 Comment
  RSA718940  Ambrosia psilostachya L. Ahart 2006-10-8 13389 Plumas North side of the North Fork of the Feather River, on the south side of Highway 70, about 1/8 mile southwest of Chambers Creek. 623 Comment
  RSA724821  Ambrosia psilostachya L. Ahart 2006-9-29 13350 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell road, about 3 miles west of Colusa Princeton Road, about 5.5 mileseast of Maxwell. 24 Comment
  RSA725462  Ambrosia psilostachya Fred M. Roberts 2007-8-6 6555 Orange San Joaquin Hills: Laguna Beach, Laguna Cyn. on east side of Laguna Cyn. Rd. adj. to dog park, 1.2 km S (air) from El Toro Road and 1.8 km WSW Moulton Survey Mk. 52 Comment
  RSA726561  Ambrosia psilostachya L. Ahart 2007-10-30 14509 Butte About 2.5 miles (air) northeast of Palermo, about 4.25 miles (air) southeast of Oroville. 130 Comment
  RSA727527  Ambrosia psilostachya L. Ahart 2007-11-8 14586 Yuba On the strand of Camp Far West Reservoir, about 1/2 mile south of Rock Creek, about 1/8 mile north of Bear River, abotu 6 miles (air) northeast of Sheridan. 91 Comment
  RSA735229  Ambrosia psilostachya Scott D. White, Angelia Carey 2004-6-4 10478 -B Riverside San Jacinto Mountain foothills: San Jacinto River wash and adjacent alluv. benches, near Indian Creek confluence. 503 Comment
  RSA737349  Ambrosia psilostachya Justin M. Wood 2008-9-19 136 Riverside SW Perris Basin: Temecula - Murrieta Creek, downstream of 1st street bridge. 293 Comment
  RSA743386  Ambrosia psilostachya Fred M. Roberts 2008-7-10 7066 Orange Dana Point: Dana Point Headlands, CNLM Preserve, along north slopes above Dana Strand Beach, 0.8km WNW Marine Institute, Dana Point Harbor. 45 Comment
  RSA744236  Ambrosia psilostachya Michael Wall 2009-11-14 498 Riverside Bautista Creek, east of Hemet off Bautista Canyon Rd. ca. 7 miles east of jct. with Fairview Ave. Comment
  RSA748717  Ambrosia psilostachya Scott D. White, Dustin Ray 2009-6-5 13113 Ventura Ojai Valley: Ventura River, E of Live Oak Acres. 122 Comment
  RSA749094  Ambrosia psilostachya David J. Keil, Lawrence M. Kelly, Kathryn Bay, Frieda Wertman 1988-11-12 21196 San Luis Obispo Near summit along CA Route 227 between San Luis Obispo and Arroyo Grande. Mosaic of coast live oak woodland, chaparral, and coastal scrub. 183 Comment
  RSA749681  Ambrosia psilostachya A. C. Sanders, Fred M. Roberts 2008-7-16 35850 Orange Lomas de Santiago, Limestone Canyon 325 Comment
  RSA751522  Ambrosia psilostachya A. C. Sanders, Fred M. Roberts 2008-8-7 35990 Orange lower Weir Canyon, at narrow gorge c. 0.6 mi. above mouth of cyn at Irvine Ranch gate. 185 Comment
  RSA751896  Ambrosia psilostachya Justin M. Wood, J. D. England 2009-7-27 1225 San Bernardino Chino Hills State Park, northridge trail and vicinity. 488 Comment
  RSA753036  Ambrosia psilostachya A. C. Sanders, Fred M. Roberts 2008-9-18 36073 Orange Lomas de Santiago, Santiago Creek Canyon c. 1 mile above the highway bridge 320 Comment
  RSA760597  Ambrosia psilostachya R. G. Swinney 2008-12-4 9948 Los Angeles Azusa, mouth of San Gabriel Canyon 1.8 mi. north of Sierra Madre Ave., north of bike trail parking lot, along flowing aqueduct of water filtration plant 223 Comment
  RSA762374  Ambrosia psilostachya R. G. Swinney 2008-11-7 9760 San Bernardino Glen Helen Regional Park, marsh to the west of the fishing lakes 610 Comment
  RSA763930  Ambrosia psilostachya R. G. Swinney 2008-10-23 9707 San Bernardino Clyde Ranch, Lone Pine Canyon 1500 Comment
  RSA764883  Ambrosia psilostachya Justin M. Wood 2010-9-8 2602 Riverside San Timoteo Canyon: Just SE of El Casco Substation along San Timoteo Creek. 640 Comment
  RSA769  Ambrosia psilostachya J. T. Howell 1927-10-29 773 Orange Bryant Ranch near Long Beach. 15 Comment
  RSA769808  Ambrosia psilostachya L. Ahart, John Dittes, Josephine Guardino 2008-11-8 15438 Butte South bank of Lindo Channel, about 50-100 yards west of the diversion structure, north of Hooker Oak, Upper Bidwell Park, Chico 69 Comment
  RSA770  Ambrosia psilostachya J. T. Howell 1927-9-24 754 Orange Santa Ana River Bottom, Rancho Santa Ana 152 Comment
  RSA776418  Ambrosia psilostachya David Pritchett 1986-8-19 VP- 14 Santa Barbara Del Sol Vernal Pool Reserve, SE corner El Colegio Rd and Camino Lindo, Isla Vista. 9 Comment
  SBBG102155  Ambrosia psilostachya M. Daily 1982-3-7 SR 534 Santa Barbara S of the Cliff House Comment
  SBBG106457  Ambrosia psilostachya S. A. Junak 1991-11-19 SN 666 Ventura W side of airfield runways, along dirt access rd, 0.1 mi W of Passenger Terminal Bldg 152 Comment
  SBBG106724  Ambrosia psilostachya S. A. Junak, I. Williams 1995-2-8 5840 Santa Barbara Simonton Cove, at E end of Charcoal Cove; at base of coastal bluffs 3 Comment
  SBBG115211  Ambrosia psilostachya R. Burgess, P. Munro 1995-9-22 1786 Ventura Emma Wood State Beach, N side of Ventura River 6 Comment
  SBBG115807  Ambrosia psilostachya S. Chaney 1994-5-23 Santa Barbara old NPS trailer location area, in Ranch at Bechers Bay Comment
  SBBG126820  Ambrosia psilostachya S. A. Junak 1995-7-19 SM 6043 Santa Barbara sandy slopes at base of coastal bluffs, middle portion of Charcoal Cove 3 Comment
  SBBG12869  Ambrosia psilostachya E. R. Blakley 1962-10-5 5447 Los Angeles Cottonwood Cyn, 0.25 mi upstream from ocean 30 Comment
  SBBG129777  Ambrosia psilostachya S. A. Junak 1996-6-20 SR 684 Santa Barbara SE end of Vail Ranch, at NPS Hdqrtrs Comment
  SBBG130112  Ambrosia psilostachya S. A. Junak 1999-9-18 SC 4281 Santa Barbara W end of beach at Coches Prietos Anchorage, back beach 3 Comment
  SBBG130790  Ambrosia psilostachya Sean Clark 2014-11-9 63 Santa Barbara Smith Hwy, 250 m from ranching area Comment
  SBBG131864  Ambrosia psilostachya S. J. DeGroot, N. Chumchim 2015-7-23 7500 Ventura Santa Clara River drainage and slopes of S Mtn SSW of Santa Paula, next to old water tank, along old rd at NW base of S Mtn; Nature Conservancy Villanueva property 95 Comment
  SBBG131875  Ambrosia psilostachya S. J. DeGroot, N. Chumchim 2015-7-15 7476 Ventura Santa Clara River floodplain ESE of Santa Paula, E of S Mtn Rd, NW of S Mtn, S of Sulphur Mtn/Santa Paula Ridge; Nature Conservancy Banman (Prairie Pacific) Property 82 Comment
  SBBG132336  Ambrosia psilostachya J. Shute, K. Merrill 2011-9-2 11 -60 Los Angeles ditch at edge of MIR fire site Comment
  SBBG18026  Ambrosia psilostachya D. E. Breedlove 1961-9-24 1293 Los Angeles Middle Ranch Cyn, 0.5 mi above Ben Weston Beach 60 Comment
  SBBG39592  Ambrosia psilostachya R. F. Thorne 1966-9-14 36672 Los Angeles Cottonwood Crk (where isthmus rd crosses) 30 Comment
  SBBG91695  Ambrosia psilostachya S. A. Junak with C. Kuizenga, S. Timbrook 1983-3-21 SN 057 Ventura mesa, W of airfield terminal along edge of runways; along dirt rd 152 Comment
  SBBG95268  Ambrosia psilostachya M. B. Dunkle 1928-10-7 1997 Los Angeles Middle Ranch Cyn Comment
  SD106664  Ambrosia psilostachya Henk van der Werff 1980-8-10 4120 San Diego Corte Madera Ranch, Pine Valley. 1200 Comment
  SD113188  Ambrosia psilostachya Darley F. Howe 1935-8-4 293 San Diego Otay Valley Comment
  SD11608  Ambrosia psilostachya Frank F. Gander 1935-6-21 222 14 San Diego I(c) mile southwest of Murray Dam in Alvarado Canyon. Comment
  SD118573  Ambrosia psilostachya Duffie Clemons 1985-7-14 1179 San Diego Canyon south of Taft Junior High School. 60 Comment
  SD11939  Ambrosia psilostachya Frank F. Gander 1935-7-10 225 3 San Diego Santa Ysabel Comment
  SD121547 Image available Ambrosia psilostachya Jack L. Reveal 1986-8-22 2861 San Diego Occasional in Transition Zone Grassland, San Dieguito Lagoon near El Camino Real. 4 Comment
  SD12208  Ambrosia psilostachya Frank F. Gander 1935-10-3 254 2 San Diego Lemon Grove Comment
  SD122972  Ambrosia psilostachya Steve Boyd 1985-8-7 1104 Riverside Northwest base of Redonda Mesa on Tenaja Road; 0.8 miles east of junction with 8S01 and 8S02. Comment
  SD12310  Ambrosia psilostachya Frank F. Gander 1935-10-24 267 7 San Diego Oak Grove Comment
  SD129895  Ambrosia psilostachya Melanie Howe, V. Moran 1988-11-6 44 San Diego Mission Trails Regional Park, Padre Dam Comment
  SD136259  Ambrosia psilostachya Melanie Howe, R. Church 1993-7-21 308 San Diego just east of Crest Canyon, Del Mar (mak 2/06) Comment
  SD136672  Ambrosia psilostachya John W. Brown 1994-1-9 MM 56 San Diego McGinty Mountain; The Mesa, northeast portion of McGinty Mountain. Comment
  SD136928  Ambrosia psilostachya Steve Boyd 1994-10-14 8392 Riverside Santa Ana Mountains, San Mateo Cyn Wilderness Area. San Mateo Canyon at confluence with Bluewater Canyon 328 Comment
  SD137915  Ambrosia psilostachya Darin L. Banks, Steve Boyd 1995-10-17 778 Riverside Northwest Palomar Mountains; Agua Tibia Mountains; Cleveland National Forest, Agua Tibia Wilderness Area, Along lower Arroyo Seco. 515 Comment
  SD146373  Ambrosia psilostachya Jon Rebman, Dale Clark and Oscar Solis 1999-9-17 6022 San Diego Mission Hills area of the city of San Diego; in canyon just SW of Mission Hills Park; behind Dale Clark's property at 1849 Lyndon Road 54 Comment
  SD146374  Ambrosia psilostachya Jon Rebman, Annette Winner and Oscar Solis 1999-9-10 5987 San Diego North Park area of the city of San Diego; canyon just south of Juniper St. between 33rd St. and Commonwealth Ave. 139 Comment
  SD152960  Ambrosia psilostachya Steve Boyd, Tim Ross and Dave Bramlet 1992-9-9 7659 Riverside Southern Santa Ana Mountains; upper San Mateo Canyon from the junction of Tenaja Road and Los Alamos Road at the confluence of Los Alamos Creek. 395 Comment
  SD153479  Ambrosia psilostachya Jeannie Gregory 2003-6-7 374 San Diego Alpine, west 5 acres of old El Rancho Metate on Tavern Road. 580 Comment
  SD154421  Ambrosia psilostachya Darlene Ward 2003-11-5 8 San Diego Ruffin Canyon bottom in Mission Village, west of Taft Middle School 77 Comment
  SD154422  Ambrosia psilostachya Karen Rich 2003-10-5 114 San Diego East Del Mar, open space along Old El Camino Real, .10 mi. N of intersection with Trento Place. 38 Comment
  SD154423  Ambrosia psilostachya Carrie Schneider, Tim Schauwecker 2003-9-20 8 San Diego East San Diego City, West Switzer Canyon area near the border of North Park and Golden Hill; North of Hwy 94 and East of Interstate 805 60 Comment
  SD154967  Ambrosia psilostachya Judy Gibson 2003-7-25 221 San Diego Descanso, ca I(c) mile north of Hulburd Grove, disturbed area in chaparral (my yard) 1121 Comment
  SD155319  Ambrosia psilostachya Jon P. Rebman, Mike Mayer 2001-10-3 7504 San Diego Mission Valley Preserve: along the San Diego River from Sefton Park to the Interstate 5 bridge 20 Comment
  SD155694  Ambrosia psilostachya Andrew R. Pigniolo 2003-10-11 1436 San Diego Cuyamaca Lake, Lucky 5 Acquisition, Location 1 - North side of creek on slope and toe of slope northwest of Fages Plaque. 1440 Comment
  SD156135  Ambrosia psilostachya Mark Mendelsohn, Anita Herring 2002-8-22 47 San Diego Santa Ysabel Ranch Open Space Preserve (East property), bordered to the west by SR-79, the north by the Santa Ysabel Indian Reservation, the east by Volcan Mountain Volcan Mountain Open Space Preserve, and to the south by the town of Wynola. 1150 Comment
  SD156921  Ambrosia psilostachya Gay Dorius 2004-7-13 69 San Diego Dry flat area W.of Stream area , bottom of N.S. leg of small isolated canyon abutts to S. side of Clairemont Mesa Blvd. 1&1/2 blks E. of Genesee Ave. and runs E.W. behind Boys Club; above Tecolote Canyon and waste water flows into Tecolote Creek 102 Comment
  SD158349  Ambrosia psilostachya Gale Bustillos 1999-3-3 3 San Diego MCAS Camp Pendleton, east end of the Air Station Comment
  SD158350  Ambrosia psilostachya Gale Bustillos 1999-3-3 20 San Diego MCAS Camp Pendleton, east end of the Air Station Comment
  SD159682  Ambrosia psilostachya Joe Barth 2004-8-26 107 San Diego Chula Vista Wildlife Reserve: in southeast SanDiego Bay; access via electrical power plant. (CVWR was constructed as mitigation for the adjacent J St. marina construction). 0 Comment
  SD159683  Ambrosia psilostachya Jim Lightner 2004-8-31 191 San Diego Bell Bluff Truck Trail 2.5 miles west of Japatul Valley Rd 900 Comment
  SD159684  Ambrosia psilostachya Dick Schwenkmeyer 2004-8-20 52 San Diego Greenbelt section of Shepard Canyon, just east of Santo Road, Tierrasanta 121 Comment
  SD159685  Ambrosia psilostachya Marguerite English 2003-5-2 42 San Diego Private property on Yucca road in Sherilton Valley. Cuyamaca Rancho State park and Cleveland National Forest surround Sherilton Valley. Plants in parking area near rose garden. 1075 Comment
  SD160433  Ambrosia psilostachya Margaret Fillius 2004-9-8 166 San Diego Rose Canyon entering from Bothe Street, and going along the trail 57 Comment
  SD160434  Ambrosia psilostachya Jeannie Gregory, M. A. Kessler, J. Barth, W. Sangkatavat 2004-8-20 1102 San Diego Lake Sutherland; off of Highway 78; eastern edge at Santa Ysabel Creek inlet 616 Comment
  SD160435  Ambrosia psilostachya Jeannie Gregory, Joe Barth 2004-8-21 1152 San Diego The D Street Fill: Sweetwater Marsh National Wildlife Refuge at SE San Diego Bay; between the Chula Vista Nature Center (Chula Vista) and Port of San Diego Marine Terminal (National City). 0 Comment
  SD160726  Ambrosia psilostachya Jon P. Rebman 2002-10-14 8286 San Diego Viejas Mountain: west side along Anderson Truck Trail/West Boundary approx. 0.5 miles north of Victoria Road in Alpine 815 Comment
  SD16110  Ambrosia psilostachya Frank F. Gander 1936-7-7 2674 San Diego Pine Hills Comment
  SD16132  Ambrosia psilostachya Frank F. Gander 1936-7-7 2696 San Diego Pine Hills Comment
  SD161996  Ambrosia psilostachya Robert K. Lauri 2002-8-9 353 San Diego Palomar Mountain, Cleveland National Forest. Along Nate Harrison Grade, approximately 2.25 miles north of Highway 76. 769 Comment
  SD163553  Ambrosia psilostachya Steve Jr. Black 2004-10-14 8 San Diego Dulzura grid - North of SR94 East of Honey Springs Rd - near Dulzura Creek 219 Comment
  SD163851  Ambrosia psilostachya David Lawhead 2004-6-29 39 San Diego East end of Agua Hedionda Lagoon, City of Carlsbad 20 Comment
  SD163852  Ambrosia psilostachya MaryAnn Brooks-Gonyer 2004-10-15 30 San Diego East side of Old Highway 395, just south of Nelson Way Comment
  SD164326  Ambrosia psilostachya Jon P. Rebman, J. Gregory, K. Rich, & M. Elvin 2003-9-30 9529 San Diego Otay Mountain Ecological Reserve (California Dept. of Fish & Game): Southeast of Otay Lake; approx. 1 mile south of Otay Lakes Road; along arroyo bottom at south end of reserve 270 Comment
  SD164327  Ambrosia psilostachya Jon P. Rebman, Jeannie Gregory 2003-7-25 9436 San Diego Rancho Jamul Ecological Reserve: west of Hwy. 94, south of Jamul & north of Otay Lakes Road; along Jamul Creek near old cement kiln 210 Comment
  SD164328  Ambrosia psilostachya Jon P. Rebman, Jeannie Gregory and Jim Rocks 2003-7-15 9353 San Diego Laguna Mountains: Lucky 5 Ranch; southern portion of new acquisition by California State Parks: west side of Sunrise Hwy (S-1) between Cuyamaca Lake and Mount Laguna 1657 Comment
  SD164830  Ambrosia psilostachya Andrew C. Sanders 2004-6-18 28199 San Diego Carlsbad, Agua Hedionda Ecological Reserve, south side of Park St beyond end of Valencia Ave. 7 Comment
  SD165316  Ambrosia psilostachya Nuri Pierce, Chris Schlech, Joe Barth, Vols. from HelixES 2004-8-28 24 San Diego Lakeside, East end of El Monte Road, El Capitan Reservoir, Upward from the dam 173 Comment
  SD165317  Ambrosia psilostachya Daniel Williford 2004-10-5 71 San Diego Fox Outdoor School, W of entrance, along San Luis Rey River, 3.5 miles NW of Lake Henshaw, Highway 76, Santa Ysabel 760 Comment
  SD166540  Ambrosia psilostachya Jon P. Rebman, J. Gregory & J. Lightner 2004-5-6 10145 San Diego Crestridge Ecological Reserve: west of La Cresta between Alpine and El Cajon; disturbed areas under oaks near gated entrance at Horsemill Road, in central part of reserve 409 Comment
  SD166926  Ambrosia psilostachya Jon P. Rebman, J. Gregory, J. Rocks. & K. Rich 2004-12-2 10774 San Diego Walker Canyon Ecological Reserve: between Boulevard and Jacumba on the north side of Interstate 8, along arroyo bottom near stream at the east end of the reserve 844 Comment
  SD166927  Ambrosia psilostachya Jon P. Rebman, J. Gregory & parabotany team 2004-8-20 10659 San Diego Lake Sutherland: north of Hwy. 78 between Ramona and Santa Ysabel; dry lakebed at southeast end of lake 605 Comment
  SD166928  Ambrosia psilostachya Jon P. Rebman, J. Gregory, J. Rocks, & J. Dewitt 2004-8-10 10612 San Diego Sycuan Peak Ecological Reserve (California Dept. of Fish & Game): southeast of Dehesa, southwest of Loveland Reservoir; on the lower north side of Sycuan Peak, at the end Sloan Canyon Road at the entrance gate to the reserve 249 Comment
  SD167299  Ambrosia psilostachya Andrew C. Sanders 2005-9-9 31626 San Diego Batiquitos Lagoon Ecological Reserve, Leucadia, SW side near I-5 and La Costa Ave. 0 Comment
  SD167300  Ambrosia psilostachya Andrew C. Sanders 2005-10-5 31693 San Diego Blue Sky Ecological Reserve (DFG), east of Rancho Bernardo and north of Poway, along road in lower canyon below turnoff to Lake Poway 182 Comment
  SD167301  Ambrosia psilostachya Andrew C. Sanders 2005-10-12 31811 San Diego Carlsbad, Carlsbad Highlands Ecological Reserve, slopes & canyons ca. 1 mile SE of Cerro de la Calavera, SW of the end of Cannon Rd. 91 Comment
  SD167895  Ambrosia psilostachya Barbara Sullivan, Nan Criqui 2005-1-16 92 San Diego City of San Diego, along Carmel Valley Rd Northeast of Los Penasquitos Lagoon 14 Comment
  SD167896  Ambrosia psilostachya Jeannie Gregory, John Gregory 2005-7-17 1816 San Diego Double S Ranch, N of Angel Mountain Road, 11 mi NW of Santa Ysabel, 2 mi W of Lake Henshaw, 4 mi E of Pine Mountain summit 1157 Comment
  SD167897  Ambrosia psilostachya Jeannie Gregory, Joe Barth 2005-7-23 1849 San Diego Town of Alpine, Viejas West private property, 1.6 miles WSW of Viejas Mountain summit, 0.6 miles NW of intersection of Anderson Road and Victoria Drive 601 Comment
  SD167898  Ambrosia psilostachya Larry Hendrickson, Kim Marsden 2003-10-17 201 San Diego Anza-Borrego Desert State Park, Sentenac Cienega just south of State Highway 78 and east of county road S-2. Comment
  SD167899  Ambrosia psilostachya Andrea Harrison 2004-11-27 15 San Diego In riverbed approx 50 yards east of ranger station, Goodan Ranch 241 Comment
  SD170001  Ambrosia psilostachya David Woelfel, June Woelfel 2005-8-14 7 San Diego NW of the City of Fallbrook, N of Daily Road, 0.7mi S of County line, 0.8 mi N of Ross Lake, at the Fallbrook Utility District area on BLM land. 341 Comment
  SD170923  Ambrosia psilostachya Dick Schwenkmeyer 2005-9-29 169 San Diego Cleveland National Forest, Laguna Mountains Recreation Area, 1.5 mi. south of Sunrise Highway on Kitchen Creek Road. 1694 Comment
  SD172934  Ambrosia psilostachya Mike D. Angel, Max Angel 2005-10-23 287 San Diego City of San Diego in Urban Canyon just N of Mission Valley. Approx 1I(c) mi NE of junction of I-8 and SR-163, just W of the Mission Center Road and Sevan Court junction (where the access roads to power line towers are located.) 39 Comment
  SD172935  Ambrosia psilostachya Larry Hendrickson 2005-6-26 1079 San Diego Cuyamaca Rancho State Park. Los Caballos equestrian campground. Approx. 0.8 mile north of Stonewall Peak and 0.3 mile east of intersection of State Hwy 79 and Stonewall Mine Rd. Eastside of Stonewall Mine Rd. beside access road to campground. 1440 Comment
  SD173368  Ambrosia psilostachya Andrew C. Sanders 2004-7-2 28451 San Diego Boden Canyon, tributary of Santa Ysabel Creek at E end of San Pasqual Valley; around pond in middle DFG parcel 320 Comment
  SD173369  Ambrosia psilostachya Andrew C. Sanders 2004-10-15 28879 San Diego San Elijo Lagoon Ecological Reserve (DFG), north end of Santa Helena Dr., 0.5 mi. west of El Camino Real, south of upper end of lagoon 11 Comment
  SD173370  Ambrosia psilostachya Andrew C. Sanders 2005-6-22 31168 San Diego Buena Vista Lagoon Ecological Reserve (DFG), Carlsbad, north side of lagoon between Carlsbad Blvd. (S-21) and the RR, south of Eaton St. Comment
  SD173371  Ambrosia psilostachya Andrew C. Sanders 2004-7-9 28475 San Diego Palomar Mtn., DFG Plaisted Creek Ecological Reserve, NE of Rincon and Pauma Valley, between Plaisted Creek and Hwy 76, SE lobe of reserve in vicinity of residences abandoned in 1996 701 Comment
  SD173669  Ambrosia psilostachya Jan E. Maxted, Don Maxted 2005-9-13 137 San Diego Bratton Valley, Land surrounding 17536 Sierra Cielo Ln, 3 mi. N. of town of Dulzura, 1.25 mi. SW of Lyons Peak summit, 1.25mi. NW of inters of Honey Springs Rd & Deerhorn Valley Rd. 723 Comment
  SD173670  Ambrosia psilostachya Jeremy Buegge 2005-7-30 1323 San Diego City of Escondido (south). Just N of Lake Hodges. Along E. Mission Rd (sign reads Old Highway 395). I(c) mile NW of junction of I-15 and Pomerado Rd (S5), 0.6 mi SE of Bernardo Mountain 103 Comment
  SD174494  Ambrosia psilostachya Beverly Pecunia, Mary Ann Brooks-Gonyer 2005-10-6 14 San Diego NE Escondidio, NE section of Lake Wohlford, along trail that parallels the North shore, Ao to I(c) mile E of East Parking Lot. 458 Comment
  SD174495  Ambrosia psilostachya Krystyna Tatarkiewicz 2005-9-5 42 San Diego Los Penasquitos Canyon Preserve, I(c) mile SE of intersection I-15 and Poway Rd, S side of Los Penasquitos Canyon Creek. 459 Comment
  SD174496  Ambrosia psilostachya Krystyna Tatarkiewicz 2005-8-6 31 San Diego Los Penasquitos Canyon Preserve, 1I(c) miles SE of intersection I-15 and Poway Rd, N side of Los Penasquitos Canyon Creek. 121 Comment
  SD175301  Ambrosia psilostachya Victoria Marshall 2005-11-13 2 San Diego Woodson Mountain, 4.5 mi west of Ramona, 5 miles east of Poway, at the top of the paved service road that accesses the microwave towers atop Mount Woodson. 861 Comment
  SD175302  Ambrosia psilostachya Jon P. Rebman, J. Gregory, M. Mulligan, & J. Barth 2005-8-13 12257 San Diego San Vicente Reservoir: North of Lakeside, east of Hwy. 67, northeast of intersection between Moreno Ave. and Vigilante Road; west side of reservoir in the second cove north of the boat landing 195 Comment
  SD175709  Ambrosia psilostachya Jon P. Rebman, M. Mulligan, K. Rich, M. White & J. Stallcup 2005-9-11 12340 San Diego Long Portrero area: NE of Tecate, SW of Morena Reservoir; ca. 3.5 miles N of Hwy. 94 and north of Portrero Valley Road along a dirt road toward Cottonwood Creek; vicinity of Portrero Creek 750 Comment
  SD177368  Ambrosia psilostachya Barbara Sullivan 2005-8-9 249 San Diego City of San Diego, Crest Canyon, in bottom of canyon, just North of the west end of Lozana Rd on half-mile loop trail. 89 Comment
  SD177369  Ambrosia psilostachya Char Glacy, Nancy Nenow 2005-9-5 120 San Diego Warner Springs, N side of Los Coyotes Rd, 1 mi S from its intersection with Isil Rd. Across Road from metal cattle grate. 1085 Comment
  SD177370  Ambrosia psilostachya Char Glacy, Nancy Nenow 2005-8-30 99 San Diego Los Penasquitos Canyon Preserve on the side trail 50ft. W of Canyonside Park entrance to the preserve. I(c) mi NW of the intersection of Black Mountain Rd. & Mercy Rd. 113 Comment
  SD177958  Ambrosia psilostachya Jon P. Rebman, J. Gregory and M. Mulligan 2006-10-5 12936 San Diego Lake Henshaw (Vista Irrigation District property): N side of Lake along Henshaw Truck Trail, approx. 2.2 miles NE of the junction of Hwy. 76 and E Grade Road 819 Comment
  SD178848  Ambrosia psilostachya MaryAnn Brooks-Gonyer, Beverly Pecunia 2005-9-28 388 San Diego 7 miles north of Escondido, path leading from north side of Gopher Canyon, at E side of intersection with Old Highway 395, between Bonsal and Valley Center; path runs parallel to Old Highway 395 in riparian area. 124 Comment
  SD179871  Ambrosia psilostachya Jon P. Rebman, J. Gregory and L. Aerne-Hains 2007-7-9 13698 San Diego Lake Henshaw: SE of East Grade Road and S of Henshaw Truck Trail, approx. 0.5 air miles NE of the dam; along the north shore of the Lake 815 Comment
  SD179872  Ambrosia psilostachya Jon P. Rebman, P. Famolaro & Parabotany Team 2007-8-8 13783 San Diego Loveland Reservoir: S of Alpine and Japatul Valley Road; downstream (south) from the dam at the extreme southeastern end of the reservoir 321 Comment
  SD180495  Ambrosia psilostachya Nancy Nenow 2005-9-1 171 San Diego San Diego, north end of Balboa Park just south of intersection of Vermont St and Cypress, along dirt access road into the canyon. 88 Comment
  SD180860  Ambrosia psilostachya Larry Hendrickson 2005-9-21 1151 San Diego Cuyamaca Rancho State Park, along access rd to Los Caballos equestrian campground, 0.8 air mi north of Stonewall Peak, 0.3 mi east of intersection of State Hwy 79 and paved access rd to Stonewall Mine. 1433 Comment
  SD180861  Ambrosia psilostachya Larry Hendrickson 2005-10-19 1207 San Diego Banner. Chariot Canyon, along Chariot Canyon Rd. (unpaved), 0.2 air mi south of intersection with State Hwy 78 near cattle guard and BLM boundary sign. 851 Comment
  SD182905  Ambrosia psilostachya Jon P. Rebman, J. Gregory, K. Rich, & P. Famolaro 2007-9-12 13979 San Diego Sweetwater Reservoir: east of National City and south of La Presa; vicinity of riparian zone and upland areas northeast and upstream from the east end of the reservoir 78 Comment
  SD183878  Ambrosia psilostachya Sharon Paulin 2004-8-7 90 San Diego Corte Madera Ranch, Oak Valley, ca. 1 mi S of gate entrance of Ranch (and I-8) on Corte Madera Rd. 1150 Comment
  SD183879  Ambrosia psilostachya Barbara Booth 2006-9-24 31 San Diego Oak Grove. 25249 Oak Grove Truck Trail, ca. 1 mile S of its intersection with Highway 79, in streambed of Rattlesnake Creek at its confluence with Temecula Creek. 915 Comment
  SD183880  Ambrosia psilostachya Victoria Marshall 2006-8-18 411 San Diego Ramona Grasslands (The Nature Conservancy), Ramona; 0.8 mi NW of the intersection of Highland Valley Rd and Rangeland Rd. 420 Comment
  SD183881  Ambrosia psilostachya Melvin M. Sweet 2006-7-21 373 San Diego City of San Diego; along utility road in canyon running from Eastgate Mall (1/3 mile NW of the intersection of Eastgate and Genesee Ave) to the end of Roselle St. (about 3/4 mile SSE from the intersection of I-5 and I-805). 85 Comment
  SD184600  Ambrosia psilostachya Larry Hendrickson 2005-7-11 1117 San Diego Anza-Borrego Desert State Park. Lucky 5 south (unofficial park name), approx. 7.0 miles SSE of intersection of State hwy. 79 and County hwy. S-1; a short distance west of S-1 ~100 meters southwest of old entrance gate. 1647 Comment
  SD185119  Ambrosia psilostachya A. C. Sanders, Kerry Knudsen 2004-9-10 28805 San Diego Boden Canyon, tributary of Santa Ysabel Creek at east end of San Pasqual Valley; at small reservoir in middle DFG Ecological Reserve. 320 Comment
  SD185444  Ambrosia psilostachya Jolynn Robbins 2004-8-23 35 San Diego Damon Lane County Park in south El Cajon. N of the intersection of Fury Ln and Wieghorst Way. 68 Comment
  SD185445  Ambrosia psilostachya Joseph A. Betzler 2002-8-2 894 San Diego San Pasqual Valley (San Diego Wild Animal Park Lease Holding). On Old Milky Way just west of the intersection with San Pasqual Valley Road (Highway 78) 121 Comment
  SD185446  Ambrosia psilostachya Linda Shipman 2006-10-16 37 San Diego Escondido, Daley Ranch (southern end), ca. 2 mi. NNE of the intersection of La Honda Dr. and El Norte Pkwy., ca. 3/4 mi. N of western half of Dixon Lake. 395 Comment
  SD185447  Ambrosia psilostachya CRES Native Seed Gene Bank, Laurie Lippitt 2005-11-10 168 San Diego City of San Diego, Los Penasquitos Canyon Preserve, 0.375 mi N of junction of Sorrento Valley Blvd and Lopez Cayon trail head, SE of Los Penasquitos Canyon Creek. 10 Comment
  SD186593  Ambrosia psilostachya Jon P. Rebman, Margie Mulligan 2008-5-23 15251 San Diego Del Dios Highlands County Preserve: SW of Escondido, NW of Lake Hodges and NE of Olivehain Reservoir; northeastern part of the preserve 148 Comment
  SD18719  Ambrosia psilostachya Frank F. Gander 1937-9-16 4436 San Diego Descanso Junction. Comment
  SD187249 Image available Ambrosia psilostachya Jon P. Rebman, M. Mulligan & W. Schmidtmann 2008-6-19 15593 San Diego Camp Pendleton Marine Corps Base: along North River Road, east of Stuart Mesa Road; along the northern edge of the Santa Margarita River in the southwestern portion of the base 6 Comment
  SD18742  Ambrosia psilostachya Frank F. Gander 1937-9-26 4459 San Diego Pine Valley Comment
  SD187608  Ambrosia psilostachya Hal Goforth 2006-6-30 48 San Diego Rancho San Diego, Hwy 94 S. at the old Steele Canyon Bridge in the dry Sweetwater river bed and banks. 95 Comment
  SD187609  Ambrosia psilostachya John LaGrange, John and Linda La Grange 2006-8-15 22 San Diego Cleveland National Forest, NW of Black Mountain, W side of Lusardi Canyon Truck Trail where the road crosses Middle Ridge between Carney Canyon and Temescal Creek, near Benchmark 2413 712 Comment
  SD187610  Ambrosia psilostachya Warren Schmidtmann, Anna Schmidtmann 2006-9-8 8 San Diego Tecate Peak, 0.8 mi E of peak. 3.1 miles on dirt truck trail to Tecate Peak from Hwy 188 (Tecate Rd), near Box Spring. 671 Comment
  SD187611  Ambrosia psilostachya Carolyn Martus 2006-7-3 301 San Diego Oceanside. Buena Vista Lagoon (western), on the north and east side of Coast Highway along the trail from the Buena Vista Audubon Nature Center. 7 Comment
  SD187612  Ambrosia psilostachya Carolyn Martus 2006-8-18 339 San Diego Bonsall, northern Bonsall Preserve land at the southern end of Ostrich Farm Creek where it meets the San Luis Rey River. 64 Comment
  SD188705  Ambrosia psilostachya Ian Cain, Phil Lambert 2006-9-24 321 San Diego City of Lakeside. Silverwood Wildlife Sanctuary, 13003 Wildcat Canyon Road. On road to observation area, S of gate parking area. 465 Comment
  SD188706  Ambrosia psilostachya Ian Cain, Emily Clayton 2006-8-13 297 San Diego City of Solana Beach. San Elijo Ecological Reserve. 160 meters north east of Santa Helena Street entrance. 14 Comment
  SD188707  Ambrosia psilostachya Jon P. Rebman, M. Mulligan & W. Schmidtmann 2008-6-19 15660 San Diego Camp Pendleton Marine Corps Base: along North River Road, east of Stuart Mesa Road; along the northern edge of the Santa Margarita River in the southwestern portion of the base 13 Comment
  SD188708  Ambrosia psilostachya Ian Cain, Terri Foster 2006-9-11 312 San Diego City of Lemon Grove. Chollas Lake Community Park. North Chollas Canyon, on road to North Chollas Canyon lot, 125 meters northeast of intersection of College Grove Drive and Caminito Chollas. 110 Comment
  SD188709  Ambrosia psilostachya Michael G Simpson 2006-5-24 2729 San Diego Iron Mountain, Poway, near southeastern edge of pond, just NE of inters of Poway Rd and Hwy 67, ca. 1 mile northwest of Iron Mountain peak. 518 Comment
  SD18910  Ambrosia psilostachya Frank F. Gander 1937-9-23 4505 San Diego Warner Springs Comment
  SD189459  Ambrosia psilostachya Andy Mauro, Kathleen Mauro 2006-10-19 34 San Diego San Dieguito County Park, City of Solana Beach, approx. I(c) mile W of S-8 and El Camino Real; entrance road at El Nido and El Camino Real. 42 Comment
  SD192214  Ambrosia psilostachya Fred Roberts, Carol A. Roberts 2006-10-15 6444 San Diego Miramar Marine Corps Air Station: Rose Cyn., south of Miramar Way between Schilt Rd. and Obregon Ave. 135 Comment
  SD19308  Ambrosia psilostachya Frank F. Gander 1937-9-28 4593 San Diego Valley Center Comment
  SD194848  Ambrosia psilostachya Victoria Marshall 2007-8-2 650 San Diego Ramona; Boulder Oaks County Part ca 7.0 mi southwest of Ramona; accessed through private property from Mussey Grade Road; collection area ca 1.5 mi west of Mussey Grade Rd at the cattle pond. 466 Comment
  SD196207  Ambrosia psilostachya Paul Beiley 2007-8-15 167 San Diego Lakeside, Louis A. Stelzer County Park, just S of Wildcat Canyon Rd. about I(c) mi. NE of its intersection with Willow Rd. Along banks of Wildcat Canyon Creek about a half-mile W of Stelzer Summit. 202 Comment
  SD196208  Ambrosia psilostachya Mike Logan, Sharan Logan 2007-9-3 1048 San Diego Oak Grove, edge of Upper San Luis Rey Resource Conservation District, just N of Oak Grove, along Hwy 79 783 Comment
  SD196209  Ambrosia psilostachya Victoria Marshall 2007-10-12 653 San Diego Ramona; Simon Park Open Space Preserve, ca 2 miles SE of intersection of Old Julian Highway and Vista Ramona Rd. 481 Comment
  SD196210  Ambrosia psilostachya Larry Hendrickson, Paul Johnson, Pam Beare, Whitney Meier. 2007-7-11 2470 B San Diego Cuyamaca Rancho State Park, Cuyamaca Mountains. At Soapstone Grade Fire Road, 2.5 surface miles north of intersection with Upper Green Valley Fire Road, 0.7 air mi. NE of Little Stonewall Peak summit. 1431 Comment
  SD19717  Ambrosia psilostachya Frank F. Gander 1937-10-21 4648 San Diego High railroad trestle east of Campo. Comment
  SD198172  Ambrosia psilostachya Melvin M. Sweet 2007-10-19 475 San Diego Cuyamaca State Park, N of Descanso Valley by the Dead Horse Trail about 2.5 km north of its intersection with the Merigan Ranch Fire Road 1192 Comment
  SD198947  Ambrosia psilostachya Jon P. Rebman, M. Mulligan, M. Dinkins, B. Lardiere 2009-7-16 18219 San Diego Camp Pendleton Marine Corps Base: Delta Training Area in the northwestern portion of base; east of Talega Canyon Road along San Mateo Creek and west of Devil Canyon 130 Comment
  SD198948  Ambrosia psilostachya Jon P. Rebman, M. Mulligan, M. Dinkins, B. Lardiere 2009-7-16 18240 San Diego Camp Pendleton Marine Corps Base: Bravo 1 Training Area in the northwestern portion of base; along Talega Canyon Road just south of the Orange County border 160 Comment
  SD20108  Ambrosia psilostachya Frank F. Gander 1937-12-5 4803 San Diego Sumner's Ranch, San Felipe 915 Comment
  SD203213  Ambrosia psilostachya Larry Hendrickson 2007-10-20 2555 San Diego Cuyamaca Mountains, Descanso Creek, Cuyamaca Rancho State Park. Below east Mesa Fire Road, 0.7 mile E of intersection of State hwy. 79, < 0.1 mile SW of Harvey Moore Connector Trail. 1221 Comment
  SD204057  Ambrosia psilostachya Jerilyn Hirshberg 2008-7-26 1898 San Diego Cleveland National Forest, NW of Cuyamaca Mtns, about 6 miles south of intersection of Hwy 78 and 79 (Santa Ysabel), immediately NW of intersection of Eagle Peak Road and road to Deadman Flat 1079 Comment
  SD204058  Ambrosia psilostachya Ian Cain, Matt Rahn, Kelsey Moreno 2008-6-20 936 San Diego City of San Diego. Mission Trails Regional Park. San Diego State University property on North Fortuna Mountain just south of highway 52. 584m east north east of North Fortuna Peak 227 Comment
  SD205154  Ambrosia psilostachya Jerilyn Hirshberg 2008-7-19 1886 San Diego Cleveland National Forest, W side of Cuyamaca Mtns, 1.5 miles west of intersection of Boulder Creek Road and Cedar Creek Road, just west of Eagle Peak 750 Comment
  SD205162  Ambrosia psilostachya Millie Basden-Thomas, Peter Thomas 2006-9-22 73 San Diego South of Julian, along Van Duesen Road, approx 1 mi E of junction with Pine Hills Rd, I(c) mi SW of intersection Cuyamaca Hwy (79) and Apple Lane 1281 Comment
  SD207534  Ambrosia psilostachya Margaret R. Mulligan, J. Hirshberg 2008-10-8 2615 B San Diego Hauser Wilderness, Cleveland National Forest: N side of Hauser Creek, S side of Hauser Creek Road, ca. A| mi S of Morena Butte, just NW of Pacific Crest Trail. 701 Comment
  SD208661  Ambrosia psilostachya Larry Hendrickson 2008-8-24 3249 San Diego Cuyamaca Mountains. Cuyamaca Rancho State Park. West Mesa Fire Road, 0.2 mile SW of intersection with State hwy. 79 and 2.0 air miles ENE of Japacha Peak. 1327 Comment
  SD209983  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann and volunteers 2010-11-16 20396 San Diego Camp Pendleton: India Training Area; south of De Luz Camp and west of the Santa Margarita River 110 Comment
  SD209984  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann and volunteers 2010-11-16 20460 San Diego Camp Pendleton: Golf Training Area; west of the Santa Margarita River; along De Luz Creek north of Camp De Luz 64 Comment
  SD209985  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann, J. Rocks & volunteers 2010-12-2 20496 San Diego Camp Pendleton: India Training Area; along De Luz Road south of Camp De Luz; vicinity of the convergence of the Santa Margarita River and De Luz Creek 39 Comment
  SD210655  Ambrosia psilostachya Margaret R. Mulligan, J. Hirshberg 2008-10-22 2653 San Diego Hauser Wilderness, Cleveland National Forest: Bronco Flats, N edge of Wilderness, S of Skye Valley Road, ca. A| mi W of its intersection with Los Pinos Road. 1000 Comment
  SD210656  Ambrosia psilostachya Margaret R. Mulligan, J. Hirshberg 2008-10-22 2628 San Diego Hauser Wilderness, Cleveland National Forest: N edge of Wilderness, in first large drainage to the NW of Stokes Valley along Skye Valley Road. Drainage begins ca. 1 mi SE on Skye Valley Road from gate to Skye Valley. 869 Comment
  SD210657  Ambrosia psilostachya Larry Hendrickson 2010-9-25 5173 San Diego Cuyamaca Mountains, Cuyamaca Rancho State Park. NW of East Mesa in Upper Green Valley, at intersection of Eastside Trail and Dyar Spring Trail, 0.4 mile E of intersection of State hwy. 79 and access road to Visitor Center and County Outdoor School. 1193 Comment
  SD210658  Ambrosia psilostachya John Groth 2008-7-4 213 San Diego Cleveland National Forest, Cuyamaca Mountains, 3.4 mi WNW of Middle Pk., 1.25 mi ESE of Sunshine Mtn., E of Boulder Creek Rd. 1036 Comment
  SD210659  Ambrosia psilostachya John Groth 2009-8-1 266 San Diego Cleveland National Forest, Cuyamaca Mtns, West side of North Peak, near Grandview Way ca. 2 miles NW of dam at Cuyamaca Lake 1372 Comment
  SD210660  Ambrosia psilostachya Larry Hendrickson 2010-8-8 5024 San Diego Cuyamaca Mountains. North slope of Pine Hills, beside Eagle Peak Road, at sharp curve, 0.1 mile S of intersection with Pine Hills Road. 1214 Comment
  SD214722  Ambrosia psilostachya Larry Hendrickson 2009-7-7 4127 San Diego Mesa Grande. San Dieguito River Park, Joint Powers Authority property. 2.9 air miles WNW of intersection of State hwy. 78-79, and 2.4 air miles SSW of access gate at Mesa Grande Road. 867 Comment
  SD215386  Ambrosia psilostachya Darin L. Banks 1997-6-16 2077 San Diego Pala Indian Reservation. North of the San Luis Rey River, along the disturbed roadsides of S16, between Trujillo Road and Pala Creek. 121 Comment
  SD215798  Ambrosia psilostachya Warren Schmidtmann, M. Mulligan, J. Hirshberg 2009-10-29 244 San Diego Hauser Wilderness, N side of E fork of Barrett Lake, Lower Boneyard Canyon. Southwestern side of Hauser Wilderness. 582 Comment
  SD215799  Ambrosia psilostachya Jerilyn Hirshberg 2009-8-8 2189 San Diego Cleveland National Forest, NW of Cuyamaca Mtns, 0.5 mile south of gate to McGee Flat on Eagle Peak Road, about 1.6 miles SW of intersection of Eagle Peak Road with Boulder Creek Road 1160 Comment
  SD215800  Ambrosia psilostachya Dick Schwenkmeyer 2008-10-10 433 San Diego Cleveland National Forest, Laguna Mountains, 0.58 mi. S of the intersection of Kitchen Creek Road and Sunrise Highway 1735 Comment
  SD216753  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann, B. Lardiere, & E. Cunningham 2011-4-22 21211 San Diego Camp Pendleton: Victor Training Area; south of Las Pulgas Road, west of I-5, on beach and in a coastal canyon; northwest of the rest stop on I-5 southbound 4 Comment
  SD217553  Ambrosia psilostachya Jeannie Gregory, Victoria Marshall 2009-6-30 3268 San Diego Mesa Grande, Nature Conservancy (Wheatly Property), 2 miles W of Morettis Junction (Pala Road & Hwy 79) E of Mesa Grande Road, 2.5 miles S of dam at Lake Henshaw 1067 Comment
  SD219280  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann and G. Kenney 2011-8-18 22256 San Diego Camp Pendleton: northwestern portion of Base south of the San Mateo River; vicinity of San Onofre Beach on the north side of San Onofre Creek near the railroad tracks 7 Comment
  SD219281  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann, G. Kenney, and others 2012-1-4 22354 San Diego Camp Pendleton: Training Area Hotel, along the Santa Margarita River; northwest of Fallbrook 60 Comment
  SD219707  Ambrosia psilostachya Larry Hendrickson 2009-10-17 4358 San Diego Anza-Borrego Desert State Park. West side of Cuyamaca Valley and NE Lake Cuyamaca dam, on the SE-slope of North Peak. 1.3 air miles SW of intersection of State hwy. 78 and County Road S-1, < 0.1 mile W of 79. 1434 Comment
  SD219708  Ambrosia psilostachya Larry Hendrickson 2009-8-1 4177 San Diego Banner Grade (State highway 78) west of Volcan Mountain on SW side of Banner Canyon. 1.5 air miles NE of Julian, 0.3 surface mile E of intersection of 78 and Wynola Road (Juch Road on some maps). 1180 Comment
  SD220154  Ambrosia psilostachya Nancy Nenow 2010-8-28 1453 San Diego Cleveland National Forest; Puerta La Cruz Road; 1.75 miles SE Mitchell Camp Road and Chihuahua Valley Road; 6 miles N of Warner Springs and Hwy 79 1182 Comment
  SD22131  Ambrosia psilostachya Frank F. Gander 1938-8-5 6269 San Diego Road to Observatory, Palomar Mountain. Comment
  SD222154  Ambrosia psilostachya R. K. Brummitt, N. A. Brummitt 1999-8-8 20290 San Diego Near N end of Cuyamaca Lake beside Sunrise Hwy. (S1); 1500 Comment
  SD225412  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann and G. Kenney 2012-5-22 24027 San Diego Camp Pendleton: Training Area Romeo II; southeast of San Onofre Peak; along Horno Canyon Road east of El Camino Real and I-5 210 Comment
  SD22598  Ambrosia psilostachya Frank F. Gander 1938-8-30 6387 San Diego Near Shrine Camp, Laguna Mountains. Comment
  SD226326  Ambrosia psilostachya Nancy Nenow, Barbara Nolan 2009-9-14 857 San Diego Warner Springs Ranch, about 1 mi NE intersection Lost Creek Road and Hwy 79, I(c) mi north of highway 79 in streambed south of the Pacific Crest Trail about one mile upstream. 925 Comment
  SD228090  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann, J. Green, V. Marshall,T. Barckley 2012-5-31 24491 San Diego Lake Hodges: south of Escondido; southeast of the intersection of Lake Drive and Beech Lane; northwest side of Lake along the shore and adjacent habitats 99 Comment
  SD229058  Ambrosia psilostachya Dick Schwenkmeyer 2012-11-6 878 Riverside West fork of Palm Canyon, Agua Caliente Indian Reservation, 4.7 mi. south of the intersection of South Palm Canyon Drive and East Palm Canyon Drive, Palm Springs. 227 Comment
  SD22948  Ambrosia psilostachya Frank F. Gander 1938-10-5 6591 San Diego Glencliff Campground. Comment
  SD22986  Ambrosia psilostachya Frank F. Gander 1938-10-5 6629 San Diego Junction Clover Flat Road. Comment
  SD231188  Ambrosia psilostachya Darin L. Banks, Mike Wall 1996-11-12 1235 San Diego NW Palomar Mountains; Agua Tibia Mountains; Cleveland National Firest, E of Agua Tibia Wilderness Area; Eastern Cutca Valley, along the area where the Cutca Trail and Cutca Road meet and crosses the upper drainages of Long Canyon. 1039 Comment
  SD23120  Ambrosia psilostachya Frank F. Gander 1938-10-20 6757 San Diego Lower San Vicente Bridge on road to Ramona. Comment
  SD23206  Ambrosia psilostachya Frank F. Gander 1938-10-20 6843 San Diego Junction; Henshaw to Pala and Palomar Road. Highway to the Stars Comment
  SD235804  Ambrosia psilostachya Sheri Konen, Mike Greene 2008-9-12 67 San Diego Ramona, 4Ao mi N of, about 1 mi W of Pamo Valley Rd along Cleveland National Forest Route 12S04 by Santa Ysabel Creek 277 Comment
  SD235805  Ambrosia psilostachya Joe Barth 2011-10-25 1876 San Diego E side of Lake Murray, Baltimore Drive finger. 163 Comment
  SD235806  Ambrosia psilostachya Beverly Pecunia 2010-9-16 307 San Diego North of Escondido; 1.6 miles NE of I-15 and Mountain Meadows Road, W of Turner Lake 444 Comment
  SD23596  Ambrosia psilostachya Frank F. Gander 1938-11-4 6876 San Diego Encinitas Comment
  SD23627  Ambrosia psilostachya Frank F. Gander 1938-11-4 6907 San Diego Carlsbad Comment
  SD238544  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann & G. Kenney 2014-4-16 27841 San Diego Camp Pendleton: southeastern portion of Base; Training Area Lima; in a ruderal/disturbed area along a dirt road just south of a large parking lot on 4th Street 103 Comment
  SD238545  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann & G. Kenney 2014-2-25 27708 San Diego Camp Pendleton: southwest portion of Base; Training Area Oscar 1, north of the Santa Margarita River between I-5 & Stuart Mesa Road, around a pond 3 Comment
  SD238546  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann, G. Kenney, & M. Mulligan 2013-9-17 26984 San Diego Camp Pendleton: northeast portion of Base; Santa Margarita Mountains, Training Area Delta, westnorthwest of Case Springs Lake, along a dirt road north of Case Springs Road 619 Comment
  SD238547  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann, G. Kenney, & M. Mulligan 2013-9-17 26955 San Diego Camp Pendleton: northeast portion of Base; Santa Margarita Mountains, along Roblar/Case Springs Road 754 Comment
  SD240550  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann & G. Kenney 2014-5-6 28261 San Diego Camp Pendleton: Training Area Charlie: northern portion of Base; along Talega Creek and Talega Road near the northern Base boundary 320 Comment
  SD241249  Ambrosia psilostachya Warren Schmidtmann 2013-8-19 389 San Diego Border Road South of Otay Mountain; 5.24 miles W of Tecate Peak; 0.61 miles N of border with Mexico; near staging area for road work 178 Comment
  SD241729  Ambrosia psilostachya T. B. Salvato 2010-9-27 5121 Orange South Coast: Dana Point Headlands, Harbor Point Park, south of Scenic Drive and Cover Road, beyond the end of Green Lantern Street, overlooking Dana Point Harbor (Dana Point 7.5'Q) 60 Comment
  SD242405  Ambrosia psilostachya Don Fosket 2013-7-6 116 San Diego Cleveland National Forest; north of Ramona; along the Santa Ysabel Creek Trail, 0.75 mile W of junction with Pamo Road 274 Comment
  SD242406  Ambrosia psilostachya Don Fosket 2013-7-18 170 San Diego Cleveland National Forest; north of Ramona; along the Santa Ysabel Creek Trail, 0.75 mile W of junction with Pamo Road 327 Comment
  SD242407  Ambrosia psilostachya Melvin M. Sweet 2009-9-14 861 San Diego Cuyamaca Rancho State Park, East Mesa; near the East Mesa Fire Road, 2.3 miles E of intersection with Hwy 79; .75 mile (line of sight) NE of Oakzanita Peak. 1479 Comment
  SD243449  Ambrosia psilostachya John LaGrange 2010-7-27 717 San Diego Cleveland National Forest; north fork of canyon draining from Mesa Grande into Carney Canyon 0.85 mile south of Patton Lode Mine 641 Comment
  SD243801  Ambrosia psilostachya 1978-8-29 San Diego Chariot Canyon Comment
  SD244921  Ambrosia psilostachya Jon P. Rebman, V. Marshall, J. La Grange, & D. Crockett 2013-6-5 26847 San Diego Cleveland National Forest: vicinity of Buckman Springs, NE of Morena Reservoir; south of Morena Stokes Valley/Corral Canyon Rd. and west of Buckman Springs Road; along streambed 925 Comment
  SD244922  Ambrosia psilostachya Jon P. Rebman, M. Rood, J. & S. Rebman-Rood, I. Happle 2013-10-5 27078 San Diego Anza-Borrego Desert State Park: Oriflamme Canyon; southeast of Julian, west of Box Canyon & south of Granite Peak; riparian area off of Mason Valley Truck Trail 829 Comment
  SD245577  Ambrosia psilostachya Richard L. Breisch 2011-9-19 860 San Diego City of San Diego, Tecolote Canyon Natural Park, south of Mt. Ariane Drive, 0.47 mile N of junction Mt. Acadia Blvd and Snead Avenue; along trail east of Tecolote Creek. 47 Comment
  SD245578  Ambrosia psilostachya Richard L. Breisch 2011-9-16 852 San Diego City of San Diego, Tecolote Canyon Natural Park, south of Mt. Ashmun Drive, within banks of Tecolote Creek about 0.5 mile S of Balboa Avenue 45 Comment
  SD246312  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann & G. Kenney 2015-5-6 30117 San Diego Camp Pendleton: southeast portion of Base; Juliet Training Area; north of Engineer Hill Rd.; near dirt road along canyon bottom & on east-facing slope 95 Comment
  SD246729  Ambrosia psilostachya Larry Hendrickson 2011-9-20 5612 San Diego Anza-Borrego Desert State Park, Laguna Mountains. Below the Pacific Crest Trail at a tributary of Oriflamme Creek. 4.3 air miles SSE of intersection of State Highway 79 and County Road S-3 (Sunrise Highway) and 0.4 mile SSE of entrance to Lucky 5 Ranch at 1468 Comment
  SD246730  Ambrosia psilostachya Larry Hendrickson 2011-7-22 5526 San Diego Cuyamaca Rancho State Park, Cuyamaca Mountains. Stonewall Creek, 0.9 air mile SE of Stonewall Peak summit and 0.6 mile S of intersection of Stonewall Creek Fire Road and Soapstone Grade Fire Road. 1345 Comment
  SD247775  Ambrosia psilostachya Nancy Nenow 2011-10-18 2114 San Diego Balboa Park; south-east corner between 26th Street and Golf Course Drive on top of mesa 0.18 mile N intersection; W of Golden Hill Recreation Center 63 Comment
  SD248572  Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann & G. Kenney 2015-5-27 30309 San Diego Camp Pendleton: southeastern portion of Base; Juliet Training Area; near Bonsall; canyon area north of Engineer Hill Road 120 Comment
  SD249904  Ambrosia psilostachya Nancy Nenow 2012-7-12 2632 San Diego Leucadia; near corner of B Street and west of South Coast Highway along a stream in a small park. 11 Comment
  SD251975  Ambrosia psilostachya Nancy Nenow, Alina Levy 2011-8-8 2049 San Diego La Jolla; W of Torrey Pines Scenic, SW of the gliderport parking lo;t near bottom stairs the stairs to Blacks Beach. 3 Comment
  SD251976  Ambrosia psilostachya CRES Native Seed Gene Bank, Miguel Kaminsky 2011-10-2 748 San Diego Ramona; Mount Gower Open Space Preserve, 0.4 mile SE of trailhead at end of Gunn Stage Road; 0.92 mile N of junction Watt Road and Ramona Oaks Rd 504 Comment
  SD251977  Ambrosia psilostachya CRES Native Seed Gene Bank, M. Kaminsky, L. Anderson 2011-11-10 757 San Diego Valley Center; Hellhole Canyon Preserve; 0.35 mile N of junction Kaivo Road and Santee Lane; 2.5 mi SE of junction of Valley Center Rd HWY S6 and Lake Wohlford Rd, SW of peak of Rodriguez Mountain 523 Comment
  SD252963  Ambrosia psilostachya Ian Cain, Emily Clayton, Lindsay Willrick 2011-9-10 1720 San Diego Julian; Volcan Mountain County Preserve; 1.95 miles NE of intersection Farmer Road and Wynola Road 1500 Comment
  SD252964  Ambrosia psilostachya CRES Native Seed Gene Bank, L. Anderson, M. Kaminsky, L. Lippitt 2011-7-29 712 San Diego Julian; 0.4 mi NE of junction of HWY 78 and HWY 79, near N end of Ethelwyn Ln, 1 mi S of junction of Banner Grade and Wynola Rd 569 Comment
  SD253595  Ambrosia psilostachya CRES Native Seed Gene Bank, L. Anderson, L. Lippitt 2011-9-8 739 San Diego Pala; Arouba Rd; vicinity 1 mi WSW of junction with Pala Temecula Road; 2.2 mi N of junction of HWY 76 and Pala Mission (Temecula) Rd. 317 Comment
  SD254194  Ambrosia psilostachya Jon Rebman, W. Schmidtmann, & G. Kenney 2016-4-12 31645 San Diego Camp Pendleton: eastern portion of Base; Juliet Training Area; southwest of Fallbrook & west of Bonsall; west of the Base boundary to the east of Vandegrift Blvd. 85 Comment
  SD254195  Ambrosia psilostachya Jon Rebman, John LaGrange 2016-4-2 31266 San Diego Cabrillo National Monument: at the southern tip of the Point Loma Peninsula near the mouth of San Diego Bay; on the upper west-facing slope along the road down to the tidal pools 64 Comment
  SD254798  Ambrosia psilostachya Susan T Welker 1990-9-23 San Diego San Elijo Lagoon Ecological Reserve; Along dirt road from N. Rios Ave., Solana Beach. Near gate on west side. West of I-5, south side of Reserve. 7 Comment
  SD254799  Ambrosia psilostachya Susan T Welker 1990-8-13 San Diego San Elijo Lagoon Ecological Reserve; Near utility road north of Stonebridge mesa. Escondido Creek Floodplain. East of I-5, east side of Reserve. 6 Comment
  SD255080  Ambrosia psilostachya Duncan S. Bell, Sarah DeGroot and Amy Rouillard 2015-10-21 8725 San Diego McCain Valley; top end of the valley, about 1.75 air miles north of the Cottonwood Campground. 1335 Comment
  SD258013  Ambrosia psilostachya Frank Landis, Fred Roberts, Josue Campos 2012-11-27 201211275 San Diego City of San Diego; Del Mar Mesa; eastern end near Highway 56; vicinity 80 yards S of intersection Torrey Santa Fe Road and Camino Del Sur. Plants growing on both banks of Deer Creek 96 Comment
  SD258014  Ambrosia psilostachya Richard L. Breisch 2014-8-16 1129 San Diego San Diego; Marian Bear Natural Park; north of main trail; near SW corner of intersection Of Highway 52 and I-805. 64 Comment
  SD25816  Ambrosia psilostachya Frank F. Gander 1939-9-14 7735 San Diego Dulzura Comment
  SD261460  Ambrosia psilostachya Jon Rebman, J. LaGrange, J. Roberts, M. Fillius, J. Mauseth, P. Cowett, & J. Moore 2017-5-12 33328 San Diego Cleveland National Forest: Barber Mountain area: west of Barrett Lake and southeast of the junction of Honey Springs Road and Lyons Valley Road; along Forest Rte. 17S10/Barber Mountain Road; along stream in rocky canyon 700 Comment
  SD261960  Ambrosia psilostachya Jon Rebman, W. Schmidtmann, M. Mulligan, & G. Kenney 2016-4-6 31358 San Diego Camp Pendleton: northwestern portion of Base; Alpha Two Training Area; San Onofre Creek riparian area east of I-5 and just south of Basilone Road, on the northern end of the San Onofre Mountains 24 Comment
  SD261961  Ambrosia psilostachya Jon Rebman, W. Schmidtmann, & G. Kenney 2016-8-24 31882 San Diego Camp Pendleton: west-central portion of Base; Oscar Two Training Area; along Las Pulgas Canyon Road east of Stuart Mesa Road and west of Basilone Road 20 Comment
  SD263545  Ambrosia psilostachya Jim Riley 2013-10-15 119 Orange San Clemente area; 0.56 miles ESE intersection Avenida Pico and Camino La Pedriza; just N San Diego County line 68 Comment
  SD263745  Ambrosia psilostachya Mary Jo Churchwell 2014-10-8 937 San Diego Anza-Borrego Desert State Park, South Fork Hellhole Canyon, 5.97 air miles SW of Borrego Springs and .80 air mile NW of intersection of County Highway S-22 and Culp Valley Campground/Pena Springs Road. 1093 Comment
  SD263746  Ambrosia psilostachya John LaGrange, N. Rigoli, A. Herman 2014-8-25 1292 San Diego Cardiff; San Elijo Lagoon Preserve; 300 yards S of intersection Manchester Ave. and Sienna Canyon Drive. 6 Comment
  SD28219  Ambrosia psilostachya Frank F. Gander 1940-9-25 8851 San Diego DeLuz Comment
  SD41392  Ambrosia psilostachya Edith A. Purer 1932-5-6 San Diego Silver Strand Comment
  SD41393  Ambrosia psilostachya Edith A. Purer 1932-8-1 4702 San Luis Obispo Morro Bay Comment
  SD41394  Ambrosia psilostachya Edith A. Purer 1932-8-27 4761 San Luis Obispo Northwest of Guadalupe. Comment
  SD41396  Ambrosia psilostachya Edith A. Purer Aug 1931 San Diego Oceanside Comment
  SD53605  Ambrosia psilostachya E. Norland 1963-7-29 San Diego Roadside near southwest corner of Kenora Dr.and Campo Highway, Spring Valley. Comment
  SD5649  Ambrosia psilostachya Fidella G. Woodcock 24 Oct 0000 San Diego Balboa Park Comment
  SD5650  Ambrosia psilostachya Ralph W. Sumner Sep -Oct 0000 San Diego Valleys near National City. Comment
  SD5653  Ambrosia psilostachya R. D. Alderson Sep 1894 San Diego Witch Creek Comment
  SD83542  Ambrosia psilostachya R. Mitchel Beauchamp, R. C. Pierce 1970-9-26 1359 San Diego North, dry end of marsh, San Dieguito Lagoon, Del Mar. Comment
  SD83639  Ambrosia psilostachya R. Mitchel Beauchamp, M. M. Beauchamp 1970-11-1 1386 San Diego Dry creek bed, near 58th and University. 135 Comment
  SD8634  Ambrosia psilostachya Daniel Cleveland Aug 1884 San Diego Ballena Comment
  SD9185  Ambrosia psilostachya Richard Alderson 1934-8-4 San Diego Pine Hills Comment
  SD92926  Ambrosia psilostachya Walter Bertsch 1954-10-30 745 San Bernardino Mohave River Bridge, on highway 18 near Victorville. 609 Comment
  SDSU12744  Ambrosia psilostachya Mary Dellevalle 1996-7-1 1 VII96A San Diego Mission Trails Regional Park, south of Kumeyaay Lake. 91 Comment
  SDSU12970  Ambrosia psilostachya Michael G. Simpson 1999-10-27 2038 Riverside Adjacent to Santa Margarita river, Santa Margarita Ecological Reserve, San Diego State University, ca.1/2 mile from Southside Facilities. 152 Comment
  SDSU13506  Ambrosia psilostachya W. Miller with C. Mosse 1972-7-13 Riverside west of M.W.D. Station. Comment
  SDSU14414  Ambrosia psilostachya John W. Brown 1993-9-24 S 1 .58 San Diego Along dirt road adjacent to San Mateo Canyon, east end of Sierra One (Bravo One), Marine Corps Base Camp Pendleton. Sect. 28 NE 1/4, T.8 S., R.6 W, USGS 7.5 minute San Clemente. 122 Comment
  SDSU14415  Ambrosia psilostachya Craig H. Reiser, Kyle L. Ince 1990-6-22 22 -VI-90 San Diego Camp Joseph Pendleton MCB. San Diego County, California. Base Section: Oscar I. 9 Comment
  SDSU14435  Ambrosia psilostachya unknown 1994-8-28 San Diego UTM-Easting: 464844.91; UTM-Northing: 3681627. Training Area: CONTONEMENT. LTETM PLOT# 27. 10 Comment
  SDSU18572  Ambrosia psilostachya Ian Cain, Matt Rahn, Kelsey Moreno 2008-6-20 936 San Diego City of San Diego. Mission Trails Regional Park. San Diego State University property on North Fortuna Mountain. 570 meters north east of North Fortuna Peak 227 Comment
  SDSU19172  Ambrosia psilostachya Kristen Hasenstab, Dave Bailey 2008-7-24 127 San Diego Sandia Creek. Riparian habitat, growing densley 4m away from water in well-shaded area. 152 Comment
  SDSU7099  Ambrosia psilostachya unknown 1929-9-1 San Diego Near Grantville. 38 Comment
  SEINET238529 Image available Ambrosia psilostachya Mitch Provance 2000-1-8 1805 Riverside Jurupa Mountains: Jurupa Mountains Cultural Center 1/4 mile SE of peak 1411. 290 Comment
  SEINET3133460  Ambrosia psilostachya S. B. Parish 1907-8-20 6424 San Bernardino San Bernardino Valley Comment
  SEINET3145453  Ambrosia psilostachya G. B. Grant 1904-7-10 38 -B Los Angeles In the city of Pasadena Comment
  SEINET3240773  Ambrosia psilostachya Melvin M. Sweet 2007-1 475 San Diego Cuyamaca State Park, N of Descanso Valley by the Dead Horse Trail about 2.5 km north of its intersection with the Merigan Ranch Fire Road. 1192 Comment
  SEINET3730121 Image available Ambrosia psilostachya Jon P. Rebman, W. Schmidtmann and G. Kenney 2012-5-22 24027 San Diego Camp Pendleton. Training Area Romeo II; southeast of San Onofre Peak; along Horno Canyon Road east of El Camino Real and I-5. 210 Comment
  SEINET3831786  Ambrosia psilostachya Linda Shipman 2006-1 37 San Diego Escondido, Daley Ranch (southern end) ca. 2 mi. NNE of the intersection of La Honda Dr. and El Norte Pkwy., ca 3/4 mi N of western half of Dixon Lake 369 Comment
  SEINET7987877  Ambrosia psilostachya Jon P. Rebman 1999-9-17 6022 San Diego San Diego, California, Mission Hills area of the city of San Diego 55 Comment
  SEINET7987878  Ambrosia psilostachya Jon P. Rebman 1999-9-10 5987 San Diego San Diego, California, N Park area of the city of San Diego 140 Comment
  SEINET7987880  Ambrosia psilostachya Jon P. Rebman 2003-9-30 9529 San Diego Otay Mountain Ecological Reserve, SE of Otay Lake;aprox. 1 mile S of Otay Lakes Road; arounda small pond on E side of reserve of reserve 270 Comment
  SEINET7987883  Ambrosia psilostachya Melvin M. Sweet 2006-7-21 373 San Diego San Diego city, along utility road in canyon running from Eage Mall. 0.75 mi. NW of the intersection of Eage and Genesee Ave, to the end of Roselle St. 85 Comment
  SEINET8044308 Image available Ambrosia psilostachya Larry Hendrickson 2005-1 1207 San Diego Banner. Chariot Canyon along Chariot Canyon Rd. (unpaved), 0.2 air mi south of intersection of state hwy. 78 near cattle guard and BLM boundry sign 852 Comment
  SFV21773  Ambrosia psilostachya J. N. Hogue 2010-7-10 370 .07 Los Angeles Los Angeles, Eagle Rock. 1316 Saginaw Street. 207 Comment
  SFV3667  Ambrosia psilostachya K. A. Wilson 1963-10-24 1303 Los Angeles Santa Monica Mountains Old Topanga Canyon Road, 0.5 miles northwest of Topanga Canyon Blvd. 245 Comment
  SFV6939  Ambrosia psilostachya T. Gordon, K. A. Wilson, M. H. Grayum, K. Felt 1974-8-31 636 Los Angeles Santa Monica Mountains Malibu Creek at Tapia Park. 137 Comment
  SJSU2991  Ambrosia psilostachya C. W. Sharsmith 1958-9-18 6622 Stanislaus by junction of San Joaquin & Stanislaus rivers, San Joaquin Valley ca. 14 miles W of Modesto Comment
  SJSU3000  Ambrosia psilostachya C. W. Sharsmith 1958-9-18 6607 Stanislaus by junction of San Joaquin & Stanislaus rivers, San Joaquin Valley ca. 14 miles W of Modesto Comment
  SJSU406  Ambrosia psilostachya A. W. Jacobs 1938-7-23 San Diego 9 miles E of Campo, Campo Creek drainage about 2 mi N of Mexican boundary, south-central San Diego County Comment
  UC1042419  Ambrosia psilostachya J. Thomas Howell 1951-8-21 28288 Yuba near Camptonville; Sierra Nevada 762 Comment
  UC1125498  Ambrosia psilostachya F. W. Embree 53 Sutter 3/4 mi nw Slough School; Marysville Buttes Quad. 15 Comment
  UC1125499  Ambrosia psilostachya D. Axelrod 1936-8-10 655 San Benito 1 3/4 mi ne of San Juan Bautista; San Juan Bautista Quad. 45 Comment
  UC1177309  Ambrosia psilostachya J. Thomas Howell 1944-9-24 20756 Marin e side of Bolinas Lagoon Comment
  UC1192150  Ambrosia psilostachya Malcolm A. Nobs and S. Galen Smith 1948-9-8 646 Los Angeles just w of Malibu Comment
  UC1206489  Ambrosia psilostachya L. R. A. 1902-9-21 2992 San Mateo Crystal Lake Comment
  UC134310  Ambrosia psilostachya T. S. Brandegee 1902-1 San Diego Mission Valley Mission Valley Comment
  UC1368696  Ambrosia psilostachya Perry Allen 1968-11-2 30 Stanislaus 2.5 mi sw, near Tuolumne R at Basso Bridge La Grange; Tuolumne River Comment
  UC1523648  Ambrosia psilostachya Robert F. Thorne, Steve Boyd, and Earl Lathrop 1985-7-18 61194 Riverside along Cole Canyon; Santa Rosa Plateau 533 Comment
  UC1555375  Ambrosia psilostachya Jerry Powell 1988-8-25 1547 Contra Costa w, on sandy beach Richmond; Point Molate Comment
  UC1584662  Ambrosia psilostachya Jerry Powell 1990-8-29 1585 Contra Costa Antioch National Wildlife Refuge Comment
  UC1605396  Ambrosia psilostachya Steve Boyd 1994-10-14 8392 Riverside San Mateo Canyon at confluence with Bluewater Canyon; Southern Santa Ana Mountains, Cleveland N.F. 329 Comment
  UC1607617  Ambrosia psilostachya Barbara Ertter, Dianne Lake, Brad Olson, Lynne Hosley, Amy Hiss 1991-8-18 10690 Contra Costa n. Pittsburg (near confluence of Sacramento & San Joaquin Rivers opposite Pittsburg marina, dry levee near lagoon in center of w. end of island); Browns Island Comment
  UC1787858  Ambrosia psilostachya Jon P. Rebman, Jeannie Gregory, Jim Rocks 2003-7-15 9353 San Diego Laguna Mountains: Lucky 5 Ranch; southern portion of new acquisition by California State Parks: west side of Sunrise Hwy (S-1) between Cuyamaca Lake and Mount Laguna 1657 Comment
  UC179502  Ambrosia psilostachya A. A. Heller 1914-9-3 11759 Butte 6 mi from, on the Chico-Hamilton road Chico Comment
  UC1928026  Ambrosia psilostachya David Keil, Lawrence M. Kelly, Kathryn Bay, and Frieda Wertman 1988-11-12 21196 San Luis Obispo Near summit along California Route 227 between San Luis Obispo and Arroyo Grande. 182 Comment
  UC29417  Ambrosia psilostachya J. Burtt Davy Oct 1 1896-Jan 1 1900 2852 Sonoma Sonoma Comment
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Nov 13 2016
  UC29419  Ambrosia psilostachya W. L. Jepson Oct 1 1893-Jan 1 1900 Sacramento Lower Sacramento Comment
  UC29422  Ambrosia psilostachya J. Burtt Davy 1897-9-25 4092 Solano Suisun Marshes Comment
  UC29423  Ambrosia psilostachya J. Burtt Davy 1897-9-25 4120 Alameda 16th street Oakland Comment
  UC336321  Ambrosia psilostachya unknown San Bernardino Colton Comment
  UC468986  Ambrosia psilostachya Harriet A. Walker 1907-9-8 888 San Joaquin Sathrop Comment
  UC468989  Ambrosia psilostachya R. L. Pendleton 1905-9-28 254 Riverside bottom Santa Ana River 243 Comment
  UC472179  Ambrosia psilostachya J. Ewan 1931-10-24 5267 Los Angeles n shore Malibu Lake Comment
  UC489271  Ambrosia psilostachya C. V. Meyer 1928-8-8 638 San Diego Escondido Comment
  UC537039  Ambrosia psilostachya Lawrence M. Booth 1932-7-19 1277 Orange Bolsas Marsh Comment
  UC53981  Ambrosia psilostachya H. P. Chandler 1907-9-9 2044 Los Angeles Ballona Marshes Comment
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Sep 26 2011
  UC54139  Ambrosia psilostachya H. M. Hall 1901-8-1 Riverside vicinity of Riverside 304 Comment
  UC57432  Ambrosia psilostachya J. H. Barber 1898-8-3 Los Angeles Topango Comment
  UC577113  Ambrosia psilostachya Lewis S. Rose 1935-7-19 35300 San Diego Ramona 426 Comment
  UC596249  Ambrosia psilostachya R. F. Hoover 1934-10-21 165 Stanislaus Ceres Comment
  UC676840  Ambrosia psilostachya Ira L. Wiggins 1927-8-30 2670 San Diego w side North Peak Comment
  UC676848  Ambrosia psilostachya Ira L. Wiggins 1926-10-16 2111 San Diego 4 mi from, on road to Cayamuca Julian; Cayamuca Mountains Region Comment
  UC676850  Ambrosia psilostachya Ira L. Wiggins 1927-8-29 2605 San Diego 4 mi e, on hwy to Santa Ysabel Ramona; Santa Ysabel, Hat Field Creek Comment
  UC71776  Ambrosia psilostachya H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UC729846  Ambrosia psilostachya Carl B. Wolf 1932-7-7 Orange Bixby Ave., s edge of field, .2 mi w of Hansen Rd, .2 mi w of se corner of ne 40 Bryant Ranch Comment
  UC88760  Ambrosia psilostachya T. S. Brandegee 1901-9-9 San Joaquin San Joaquin Bridge Comment
  UC891360  Ambrosia psilostachya Carl B. Wolf 1932-10-5 Los Angeles junction os Isthmus Rd and road to Black Jack Peak Isthmus Road; Santa Catalina Island 243 Comment
  UCD128766  Ambrosia psilostachya Beecher Crampton 1952-10-11 856 Yolo 1 mile north of city of Davis. Comment
  UCD128767  Ambrosia psilostachya Fred Hrusa; Sally Wagner 1992-7-18 9221 Sacramento Delta Meadows River Park. About 25 air miles S of Sacramento, 10 air miles W of Galt, and 1 air mile NE of Walnut Grove. Immed. E of Locke, in the Sacramento River Delta, N of the Delta Cross Channel. 0 Comment
  UCD128815  Ambrosia psilostachya A. S. Crafts 1926-7-8 436 Yolo University Farm Campus, Davis. Comment
  UCD128816  Ambrosia psilostachya R. L. Adams 1925-1 s.n. Monterey Salinas. Comment
  UCD128817  Ambrosia psilostachya A. A. Heller 1914-8-11 11759 Butte Chico-Hamilton road, 6 miles from Chico. Comment
  UCD128818  Ambrosia psilostachya G. K. Helmkamp; E. A. Helmkamp 2007-10-7 13076 Butte Northern Sacramento Valley: Biggs East Hwy, 1.6 miles east of CA-99 at Biggs. 35 Comment
  UCD128820  Ambrosia psilostachya E. M. Johnston 1915-7-1 W 125 Merced Los Banos. Comment
  UCD128822  Ambrosia psilostachya P. B. Kennedy 1916-7-23 s.n. Yolo location unknown. Comment
  UCD128823  Ambrosia psilostachya Daryl Koutnik; John Sowell 1978-10-27 567 Yolo Putah Creek, east of county road 106 and west of Yolo Causeway. 6 Comment
  UCD128824  Ambrosia psilostachya Malcolm A. Nobs 1948-9-8 646 Los Angeles just west of Malibu. Comment
  UCD128826  Ambrosia psilostachya G. L. Stebbins Jr. 1976-9-25 76292 El Dorado 4 miles W of Coloma, along South Fork American River. 213 Comment
  UCD128829  Ambrosia psilostachya Ernest C. Twisselmann 1959-11-2 5887 Santa Barbara San Luis Obispo County: southwest end of Oso Flaco Lake. Shandon. 4 Comment
  UCD128830  Ambrosia psilostachya Harriet A. Walker Date unknown 975 -b Solano Suisun, near Southern Pacific Railroad Track. Comment
  UCD142964  Ambrosia psilostachya Ellen Dean; N. Gonzales 2013-8-8 7937 Yolo Downstream of Monticello Dam along Hwy 128, north side of Putah Creek in Putah Creek Vegetation Survey Plot INT 2A. 45 Comment
  UCD148100  Ambrosia psilostachya Jake Ruygt 1987-7-29 2091 Napa City of Napa: bank of Napa River just south of Third Street. 2 Comment
  UCD149340  Ambrosia psilostachya Carl Schoner 1955-9-1 s.n. Yolo City of Woodland. 25 Comment
  UCD159514  Ambrosia psilostachya D. S. Park 2010-9-12 260 -1 Ventura Oxnard. Growing in abandoned lot full of trash on Courtland St.. Possibly old landfill. Abundant. 10 Comment
  UCD159515  Ambrosia psilostachya D. S. Park 2010-9-12 260 -2 Ventura Oxnard. Growing in abandoned lot full of trash on Courtland St.. Possibly old landfill. Abundant. 10 Comment
  UCD159516  Ambrosia psilostachya D. S. Park 2010-9-13 261 -1 San Diego Balboa Park. Abundant along golf area. 70 Comment
  UCD159517  Ambrosia psilostachya D. S. Park 2010-9-13 261 -2 San Diego Balboa Park. Abundant along golf area. 70 Comment
  UCD36088  Ambrosia psilostachya Beecher Crampton 1952-10-11 856 Yolo 1 mile north of city of Davis. Comment
  UCD41074  Ambrosia psilostachya Carol W. Witham 2003-8-8 1005 Yolo DFG Tule Ranch vernal pools. Approximately 8 miles southeast of Davis. Southeast of the junctions of County Roads 38 and 105. 4 Comment
  UCD53951  Ambrosia psilostachya Steve Dowty 1993-9-19 12- 154 Sacramento Cosumnes River Preserve Plant Inventory; south Area 12. Comment
  UCD53956  Ambrosia psilostachya David Popp and Darlene Chirman 1993-8-8 CDFG- 2 Sacramento Cosumnes River Preserve Plant Inventory. Comment
  UCD72396  Ambrosia psilostachya Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5122 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Confluence of Cache and Bear Creeks at southern tip of ranch. 198 Comment
  UCD81557  Ambrosia psilostachya W. W. Robbins; W. D. Norton 1927-10-1 s.n. Yolo West of Davis. Comment
  UCR100429  Ambrosia psilostachya Scott D. White 1997-11-5 6019 Los Angeles Malibu Coast, Mouth of Trancas Canyon, north of Pacific Coast Hwy (= Calif. Hwy 1) 8 Comment
  UCR103737  Ambrosia psilostachya A. C. Sanders 1997-11-20 21618 Riverside Lake Skinner Reserve area, mouth of Rawson Canyon, just NE of Lake Skinner. 457 Comment
  UCR106915  Ambrosia psilostachya D. L. Banks, L. Raz 1996-11-5 1184 Riverside Agua Tibia Mountains, Pechanga Indian Reservation, south of San Gabriel Church; along a newly established firebreak along a NW-SE running ridgeline, near the water tank in section 34 421 Comment
  UCR109666  Ambrosia psilostachya R. D. Goeden, Don W. Ricker 1969-2-11 s.n. San Diego Coastal Plain, Miramar 137 Comment
  UCR109690  Ambrosia psilostachya R. D. Goeden, Don W. Ricker 1969-9-11 s.n. Los Angeles Los Angeles Basin region; San Gabriel Valley, Rio Hondo at San Gabriel Blvd., near Whittier Narrows Dam and Hwy 19 61 Comment
  UCR114003  Ambrosia psilostachya Mitch Provance 2000-5-5 2132 San Bernardino W La Loma Hills, Colton, S Pellisier Rd., c. 0.5 km north of the corner of W Center St. and Orange St. 305 Comment
  UCR114200  Ambrosia psilostachya A. C. Sanders, D. Malueg, K. D. Jones, et al 2000-9-8 23632 Riverside Perris-Aguanga Basin Region, gasline right of way across Pinto and Hoopes Ranches, east of Briggs Road at and near Warm Springs Creek, south of Scott Rd. 415 Comment
  UCR114466  Ambrosia psilostachya Mitch Provance 1998-7-4 865 San Bernardino W La Loma Hills, Colton, S Pellisier Rd., near the corner of W Center St. and Orange St. 262 Comment
  UCR11540  Ambrosia psilostachya Harlan Lewis 1939-9-23 1004 Los Angeles West Los Angeles 61 Comment
  UCR115804  Ambrosia psilostachya George K. Helmkamp, E. A. Helmkamp 2000-10-17 6226 San Diego Peninsular Range, Lawrence Welk Commercial Complex, c. 1.5 miles west of the Oat Hills, and south of Moosa Canyon 299 Comment
  UCR115929  Ambrosia psilostachya Mitch Provance 2000-1-8 1805 Riverside Jurupa Mountains, Jurupa Mountains Cultural Center, 1/4 mile SE of peak 1411. 305 Comment
  UCR120124  Ambrosia psilostachya Jon P. Rebman, Dale Clark, Oscar Solis 1999-9-17 6022 San Diego Mission Hills area of the city of San Diego; canyon just SW of Mission Hills Park; behind Dale Clark's property at 1849 Lyndon Road 55 Comment
  UCR120134  Ambrosia psilostachya Jon P. Rebman, Annette Winner, Oscar Solis 1999-9-10 5987 San Diego South Coast, North Park area of the city of San Diego, canyon just south of Juniper Street between 33rd Street and Commonwealth Ave. 140 Comment
  UCR120844  Ambrosia psilostachya B. G. Pitzer 1998-10-17 3775 San Bernardino San Bernardino Mtns, Los Rios Rancho, south of Oak Glen 1341 Comment
  UCR121890  Ambrosia psilostachya Ian G. Gillespie 2001-5-7 77 Riverside East side of Santa Ana Mountains, Temescal Valley Area, also known as Sycamore Canyon Area. North of Indian Truck Trail, in drainage off of De Palma Road. Heavy construction currently underway in adjacent areas 335 Comment
  UCR122231  Ambrosia psilostachya A. C. Sanders, J. R. Ekhoff 2001-9-7 24869 San Diego Peninsular Range, Boden Canyon, tributary of Santa Ysabel Creek at E end of San Pasqual Valley; along road in upper DFG parcel 396 Comment
  UCR123361  Ambrosia psilostachya A. C. Sanders, Mark Elvin, Cathleen Weigand 2002-7-30 25475 Los Angeles NE end of Santa Susana Mtns., Newhall Ranch, Potrero Canyon just above old ranch buildings and corrals 335 Comment
  UCR124140  Ambrosia psilostachya Steve Boyd, T. S. Ross 1989-8-28 3805 Riverside Peninsular Range, Vail Lake area, Temecula Creek at confluence w/ the lake & adjacent sedimentary hills to the east. 488 Comment
  UCR125134  Ambrosia psilostachya A. C. Sanders, Mark Elvin, Cathleen Weigand 2002-8-1 25546 Los Angeles NE end of Santa Susana Mtns., Newhall Ranch, canyon on south side of central Potrero Canyon, SSW of old ranch headquarters 396 Comment
  UCR126346  Ambrosia psilostachya A. C. Sanders 2003-8-6 27119 Los Angeles NE end of Santa Susana Mtns., Newhall Ranch, Potrero Canyon, bottom of valley above old ranch headquarters 335 Comment
  UCR134445  Ambrosia psilostachya George K. Helmkamp 2003-9-26 8176 San Luis Obispo Central Coast, SW edge of Oceano; border of sand dune recreation area 6 Comment
  UCR136090  Ambrosia psilostachya A. C. Sanders 2004-6-18 28199 San Diego South Coast, Carlsbad, Agua Hedionda Ecological Reserve, south side of Park St beyond end of Valencia Ave. 8 Comment
  UCR137277  Ambrosia psilostachya A. C. Sanders, Kerry Knudsen 2004-7-2 28451 San Diego Peninsular Range, Boden Canyon, tributary of Santa Ysabel Creek at E end of San Pasqual Valley; around pond in middle DFG parcel 320 Comment
  UCR137299  Ambrosia psilostachya A. C. Sanders, Kerry Knudsen, J. R. Ekhoff 2004-7-9 28475 San Diego Peninsular Range, Palomar Mtn., DFG Plaisted Creek Ecological Reserve, NE of Rincon and Pauma Valley, between Plaisted Creek and Hwy 76, SE lobe of reserve in vicinity of residences abandoned in 1996 793 Comment
  UCR141234  Ambrosia psilostachya A. C. Sanders, Mike Misenhelter 2004-10-6 28833 Riverside Santa Ana Mtns./Santa Rosa Plateau, hill 2139 at west end of the Mesa De Colorado, private land on the west side of Via Volcano adjacent to the Santa Rosa Plat. Ecol. Reserve 640 Comment
  UCR141258  Ambrosia psilostachya A. C. Sanders, Kelly Volansky 2004-10-6 28824 Riverside Santa Ana Mtns./Santa Rosa Plateau, 41050 Avenida La Cresta, south of Sierra Maria Rd. and c. 1.5 mi. north of Tenaja Rd., c. 2 miles NW of the Mesa de Colorado 671 Comment
  UCR142611  Ambrosia psilostachya A. C. Sanders, Kerry Knudsen 2004-10-15 28879 San Diego South Coast, San Elijo Lagoon Ecological Reserve (DFG), north end of Santa Helena Dr., 0.5 mi. west of El Camino Real, south of upper end of lagoon 30 Comment
  UCR143925  Ambrosia psilostachya A. C. Sanders, Lee Jones 2004-11-7 29024 Los Angeles San Fernando Valley, site called Lookout Gates on topo, 1 mile NE of Chatsworth at foot of Santa Susana Mtns., 5 acre estate proposed for conversion to private high school (Sierra Canyon H.S.), west of the north end of Lurline Ave, N of Nashville St., just south of 118 Fwy 351 Comment
  UCR145921  Ambrosia psilostachya Jon P. Rebman, Jeannie Gregory 2003-7-25 9436 San Diego Peninsular Range, Rancho Jamul Ecological Reserve: west of Hwy. 94, south of Jamul & north of Otay Lakes Road; along Jamul Creek near old cement kiln 210 Comment
  UCR153995  Ambrosia psilostachya Jon P. Rebman, M. Mayer 2001-10-3 7504 San Diego Mission Valley Preserve: along the San Diego River from Sefton Park to the Interstate 5 bridge. Square: R8 20 Comment
  UCR154772  Ambrosia psilostachya A. C. Sanders 2005-5-27 30320 San Diego South Coast, Batiquitos Lagoon Ecological Reserve, north side of lagoon, east of the I-5 Fwy, along the trail past the nature center 30 Comment
  UCR156174  Ambrosia psilostachya Jon P. Rebman, J. Gregory, J. Rocks. & K. Rich 2004-12-2 10774 San Diego Walker Canyon Ecological Reserve: between Boulevard and Jacumba on the north side of Interstate 8, along arroyo bottom near stream at the east end of the Reserve. San Diego Atlas Square T27 845 Comment
  UCR156718  Ambrosia psilostachya Jon P. Rebman, J. Gregory, J. Rocks, & J. Dewitt 2004-8-10 10612 San Diego Sycuan Peak Ecological Reserve (California Dept. of Fish & Game): southeast of Dehesa, southwest of Loveland Reservoir; on the lower north side of Sycuan Peak, at the end Sloan Canyon Road at the entrance gate to the reserve 250 Comment
  UCR156724  Ambrosia psilostachya Jon P. Rebman, J. Gregory & James Lightner 2004-5-6 10145 San Diego Crestridge Ecological Reserve: west of La Cresta between Alpine and El Cajon; disturbed areas under oaks near gated entrance at Horsemill Road, in central part of reserve 410 Comment
  UCR159029  Ambrosia psilostachya A. C. Sanders, Jennifer Jones 2005-6-22 31168 San Diego South Coast, Buena Vista Lagoon Ecological Reserve (DFG), Carlsbad, north side of lagoon between Carlsbad Blvd. (S-21) and the RR, south of Eaton St. 6 Comment
  UCR159261  Ambrosia psilostachya A. C. Sanders, Kelly Volansky 2005-8-31 31588 Riverside Santa Ana Mtns. Region, Santa Rosa Plateau, hills west of headwaters of De Luz Creek, 50 acre parcel on east side Avenida La Cresta south of Sierra Elena Rd., c. 0.5 mi. N of Tenaja Rd. 701 Comment
  UCR159504  Ambrosia psilostachya Jon P. Rebman, J. Gregory, K. Rich, & M. Elvin 2003-9-30 9529 San Diego Otay Mtn Ecological Reserve (Calif. Dept. of Fish & Game): SE of Otay Lake, c. 1 mi south of Otay Lakes Rd.; along arroyo bottom at S end of the reserve. Square: U14 270 Comment
  UCR161235  Ambrosia psilostachya George K. Helmkamp, E. A. Helmkamp 2004-11-18 8866 Santa Barbara South Central Coast, Ocean Beach Park along Ocean Ave (Calif. highway 246), NW of Lompoc and just south of Surf railroad station 11 Comment
  UCR161428  Ambrosia psilostachya A. C. Sanders, T. B. Salvato 2005-9-9 31626 San Diego South Coast, Batiquitos Lagoon Ecological Reserve, Leucadia, SW side near I-5 and La Costa Ave. 6 Comment
  UCR162016  Ambrosia psilostachya A. C. Sanders, T. B. Salvato 2005-10-5 31693 San Diego Peninsular Range, Blue Sky Ecological Reserve (DFG), east of Rancho Bernardo and north of Poway, along road in lower canyon below turnoff to Lake Poway 213 Comment
  UCR162197  Ambrosia psilostachya A. C. Sanders, T. B. Salvato 2005-10-12 31811 San Diego South Coast, Carlsbad, Carlsbad Highlands Ecological Reserve, slopes & canyons c. 1 mile SE of Cerro de la Calavera, SW of the end of Cannon Rd. 91 Comment
  UCR165862  Ambrosia psilostachya A. C. Sanders, Kerry Knudsen 2004-9-10 28805 San Diego Peninsular Range, Boden Canyon, tributary of Santa Ysabel Creek at E end of San Pasqual Valley; at small reservoir in middle DFG Ecological Reserve parcel 320 Comment
  UCR167839  Ambrosia psilostachya T. B. Salvato, Melissa Clemons 2005-6-23 1323 Riverside Peninsular Range; Temescal Valley, 3 miles NW of Alberhill, Temescal Canyon Road at Corona [Lee] Lake 366 Comment
  UCR182537  Ambrosia psilostachya Mitch Provance 2003-7-4 4639 Riverside San Bernardino Valley, Riverside, Monticello Ave. near the canal, between Driftwood and Conway Drives 226 Comment
  UCR18770  Ambrosia psilostachya John C. Roos 1965-10-3 s.n. San Bernardino San Bernardino Valley, Loma Linda 305 Comment
  UCR188574  Ambrosia psilostachya George K. Helmkamp, E. A. Helmkamp 2007-10-7 13076 Butte Northern Sacramento Valley, along Biggs East Highway, 1.6 miles east of CA-99 in Biggs 35 Comment
  UCR193830  Ambrosia psilostachya A. C. Sanders, Fred M. Roberts 2008-7-16 35850 Orange Peninsular Range; Santa Ana Mtns., Lomas de Santiago, Limestone Canyon 325 Comment
  UCR194219  Ambrosia psilostachya Scott D. White, Angelia Carey 2004-6-4 10478 B Riverside San Jacinto Mtn Foothills, San Jacinto River wash and adjacent alluvial benches, near Indian Creek confluence 534 Comment
  UCR194890  Ambrosia psilostachya George K. Helmkamp, E. A. Helmkamp 2007-10-28 13114 Sutter Sacramento Valley, along Nicolaus Road at Coon Creek, 0.9 mi west of Placer County line 18 Comment
  UCR195207  Ambrosia psilostachya A. C. Sanders 2008-8-14 36036 Ventura South Coast; Ventura Coastal Basin, Port Hueneme, Courtland St. at Cuesta del Mar Dr., N of West Hueneme Rd. 5 Comment
  UCR195701  Ambrosia psilostachya A. C. Sanders, Fred M. Roberts 2008-8-7 35990 Orange Peninsular Range; Santa Ana Mtns., lower Weir Canyon, at narrow gorge c. 0.6 mi. above mouth of cyn at Irvine Ranch gate 192 Comment
  UCR197676  Ambrosia psilostachya A. C. Sanders, Fred M. Roberts 2008-9-18 36073 Orange Peninsular Range; Santa Ana Mtns. Foothills, Lomas de Santiago, Santiago Creek Canyon c. 1 mile above the highway bridge 330 Comment
  UCR201882  Ambrosia psilostachya Justin M. Wood 2008-9-19 136 Riverside SW Perris Basin, Temecula - Murrieta Creek, downstream of First Street Bridge 305 Comment
  UCR202276  Ambrosia psilostachya Jon P. Rebman, P. Famolaro and Parabotany Team 2007-8-8 13783 San Diego Loveland Reservoir, south of Alpine and Japatul Valley Road, just below the dam (south) at the extreme southeastern end of the reservoir. Square Q16 322 Comment
  UCR202794  Ambrosia psilostachya Melvin M. Sweet 2007-10-19 475 San Diego Peninsular Range, Cuyamaca State Park; north of Descanso Valley by the Dead Horse Trail about 2.5 km north of its intersection with the Merigan Ranch Fire Road. Square O20, San Diego Co. Plant Atlas. 1192 Comment
  UCR210067  Ambrosia psilostachya A. C. Sanders 2009-11-6 37211 Los Angeles South Coast, Madrona Marsh, Torrance 24 Comment
  UCR210331  Ambrosia psilostachya R. G. Swinney 2008-11-7 9760 San Bernardino San Bernardino Valley/ San Gabriel Mtns., Glen Helen Regional Park, marsh to the west of the fishing lakes 610 Comment
  UCR210370  Ambrosia psilostachya T. B. Salvato, Billy Deane 2006-10-16 1938 Orange South Coast, Irvine, San Diego Creek flood control channel, between Michelson Drive and the 405 FWY 12 Comment
Read comments
Jul 30 2010
  UCR210528  Ambrosia psilostachya R. G. Swinney 2008-12-4 9948 Los Angeles San Gabriel Mtns., Azusa, mouth of San Gabriel Canyon 1.8 mi. north of Sierra Madre Ave., north of bike trail parking lot, along flowing aqueduct of water filtration plant 223 Comment
  UCR210660  Ambrosia psilostachya R. G. Swinney 2008-10-23 9707 San Bernardino San Gabriel Mtns., Clyde Ranch, Lone Pine Canyon 1500 Comment
  UCR210723  Ambrosia psilostachya R. G. Swinney 2008-11-10 9812 San Bernardino San Gabriel Mtns., Cajon Pass, 0.6 mi. SW of Swarthout Canyon Rd. junction with Cajon Road 805 Comment
  UCR211085  Ambrosia psilostachya Joseph Cahill 2009-7-15 3152 Ventura South Coast, between Port Hueneme and Mugu Lagoon, trail where Arnold Rd. ends at beach 1 Comment
  UCR211091  Ambrosia psilostachya Joseph Cahill 2009-7-18 3162 Ventura South Coast, between Port Hueneme and Mugu Lagoon, trail where Arnold Rd. ends at beach 1 Comment
  UCR219095  Ambrosia psilostachya George K. Helmkamp, E. A. Helmkamp 2009-9-5 15572 Butte Sacramento Valley, Lower Honcut Road, 0.8 mile east of its junction with CA-70, 2.5 mi. WSW (261 deg. ) of Honcut, 6.6 mi. SE (116 deg. ) of Gridley 27 Comment
  UCR222883  Ambrosia psilostachya T. B. Salvato 2010-10-27 5121 Orange South Coast, Dana Point Headlands, Harbor Point Park, south of Scenic Dr. and Cove Rd., beyond the end of Green Lantern St., overlooking Dana Point Harbor 70 Comment
  UCR224155  Ambrosia psilostachya Fred M. Roberts 2008-7-10 7066 Orange South Coast, Dana Point Headlands, CNLM Preserve, along north slopes above Dana Strand Beach, 0.8 km west norhwest of Marine Institute, Dana Point Harbor 45 Comment
  UCR230093  Ambrosia psilostachya George K. Helmkamp, E. A. Helmkamp 2010-10-20 17044 Sutter Sacramento Valley, along Nicolaus Road/Garden Hwy at the southwest edge of Nicolaus, 0.3 mi. NE of Hwy 99 17 Comment
  UCR236805  Ambrosia psilostachya Jon P. Rebman, Warren Schmidtmann, B. Lardiere, E. Cunningham 2011-4-22 21211 San Diego Camp Pendleton, Victor Training Area, south of Las Pulgas Road, west of I-5, on beach and in coastal canyon; northwest of the rest stop on I-5 southbound. Square F4. 5 Comment
  UCR236933  Ambrosia psilostachya Jon P. Rebman, Warren Schmidtmann & volunteers 2010-11-16 20460 San Diego Camp Pendleton; Golf Training Area; west of the Santa Margarita River, along De Luz Creek, north of Camp De Luz. Square C6 65 Comment
  UCR239728  Ambrosia psilostachya Jon P. Rebman, Warren Schmidtmann, G. Kenney, et al. 2012-1-4 22354 San Diego Camp Pendleton, Training Area Hotel, along the Santa Margarita River, northwest of Fallbrook 60 Comment
  UCR239931  Ambrosia psilostachya O. F. Clarke 2004-6-23 s.n. Orange South Coast, Newport Back Bay, just south of the Muth Interpretive Center 15 Comment
  UCR239932  Ambrosia psilostachya O. F. Clarke 2003-9-4 s.n. Riverside Peninsular Range; San Jacinto Mtns., Brown Creek drainage just above the confluence with Twin Pines Creek, near the old Cabazon-Idyllwild Rd. 915 Comment
  UCR240007  Ambrosia psilostachya R. G. Swinney 2009-9-3 11568 San Bernardino Transverse Range; San Gabriel Mountains, Lost Lake (San Andreas Fault sag pond), east end of Lone Pine Valley 851 Comment
  UCR242020  Ambrosia psilostachya George K. Helmkamp, E. A. Helmkamp 2012-10-3 19960 Sacramento Southeast Sacramento Valley, bike trail parking area at the south side of the American River, 0.6 mile west of Gold Country Road 27 Comment
  UCR24359  Ambrosia psilostachya John C. Roos 1938-8-19 2750 San Bernardino San Bernardino Valley, Loma Linda 305 Comment
  UCR24361  Ambrosia psilostachya John C. Roos 1942-9-28 1716 Los Angeles Beverly Blvd., Los Angeles 122 Comment
  UCR247914  Ambrosia psilostachya Fred M. Roberts 2012-7-18 7679 Orange SAN JOAQUIN HILLS: Newport Beach, Buck Gully, Buck Gully Trail, west end, just east of north terminus of Poppy Street and 2.1 km WNW summit of Pelican Hill 37 Comment
  UCR253812  Ambrosia psilostachya George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20103 Placer Sacramento Valley, north of William Lane on an unnamed levee road to Markham Ravine 35 Comment
  UCR254225  Ambrosia psilostachya Joe Barth 2011-10-25 1876 San Diego Peninsular Range, E side of Lake Murray; Baltimore Dr. finger of the lake; Atlas square Q11 163 Comment
  UCR254518  Ambrosia psilostachya Jon P. Rebman, Warren Schmidtmann, G. Kenney, Margaret R. Mulligan 2013-9-17 26984 San Diego Camp Pendleton, northeastern portion of base, Santa Margarita Mountains, Training Area Delta, WNW of Case Springs Lake, along a dirt road north of Case Springs Road Atlas Square: B4 620 Comment
  UCR255484  Ambrosia psilostachya Dan S. Cooper 2014-6-12 614- 13 Los Angeles Western Transverse Range; Eastern Santa Monica Mtns., Griffith Park, west edge of Wilson-Harding Golf Course, east of Boys Camp Rd. 149 Comment
  UCR263866  Ambrosia psilostachya Robert K. Lauri 2002-8-9 353 San Diego Peninsular Range, Palomar Mountain, Cleveland National Forest. Along Nate Harrison Grade, c. 2.25 miles north of Highway 76 770 Comment
  UCR265142  Ambrosia psilostachya Mark A. Elvin 2014-11-5 7823 Ventura South Coast, Ventura Coastal Basin, McGrath State Beach, dunes south of the mouth of the Santa Clara River, 200-300 m from Pacific Ocean 4 Comment
  UCR269331  Ambrosia psilostachya Steven A. Junak 1999-9-18 SC- 4281 Santa Barbara Channel Islands, Santa Cruz Island: W end of beach at Coches Prietos Anchorage, back beach 3 Comment
  UCR272132  Ambrosia psilostachya Duncan S. Bell, Sarah J. De Groot, Amy Rouillard 2015-10-21 8725 San Diego top end of the McCain Valley, c. 1.75 air miles north of the Cottonwood Campground 1335 Comment
  UCR277186  Ambrosia psilostachya R. G. Swinney 2010-10-5 13967 Los Angeles San Gabriel Mountains, Placerita Cyn., Placerita Canyon Natural Area, 50-300 meters west of Nature Center 463 Comment
  UCR278864  Ambrosia psilostachya Mitch Provance 2011-6-4 17129 San Bernardino Santa Ana River Valley, Colton, Cooley Ranch area, E Steel Rd., roughly where it passes under the I-10 265 Comment
  UCR281009  Ambrosia psilostachya Mitch Provance, Jeremiah George, Matt K. Beyers, John Hazlett 2017-6-6 617- 23 Riverside Temescal Valley, Property on S side of Temescal Canyon Rd., just W of Concordia Ranch Rd. 363 Comment
  UCR34443  Ambrosia psilostachya A. C. Sanders, N. M. Fellows 1983-10-12 03975 San Bernardino Mojave Desert/ Little San Bernardino Mtns., Big Morongo Preserve of the Nature Conservancy in Big Morongo Canyon, south of town of Morongo Valley 795 Comment
  UCR34911  Ambrosia psilostachya L. B. Ziegler 1967-9-18 247 Riverside San Jacinto Mtns, Bautista Canyon 673 Comment
  UCR40411  Ambrosia psilostachya Steve Boyd 1985-8-7 1104 Riverside Santa Ana Mtns., Santa Rosa Plateau, Santa Rosa Plateau, NW base of Redonda Mesa on Tenaja Road, 0.8 mi east of the junction w/ 8S01 & 8S02 671 Comment
  UCR69986  Ambrosia psilostachya Scott D. White, S. Myers 1991-9-27 91- 16 San Bernardino Mojave Desert, Mojave River, 0.25 km NW of Hwy I-15 817 Comment
  UCR73108  Ambrosia psilostachya Scott D. White 1992-9-29 846 Orange Vicinity of City of Brea, immediately north of Carbon Canyon Road and east of Placentia Avenue, +- 1 mi (airline) SSE of Tonner Canyon 183 Comment
  UCR82294  Ambrosia psilostachya A. C. Sanders, P. MacKay, S. White & C. Sanders 1994-9-18 15696 San Bernardino San Bernardino Mtns, Clark's Ranch (site) along the Seven Pines Rd, c. 0.25 mi east of Deer Creek, Santa Ana River Canyon 1494 Comment
  UCR92772  Ambrosia psilostachya F. M. Reed 1933-10-6 8107 Riverside South Coast; San Bernardino Valley, Riverside, Chicago Ave. 280 Comment
  UCR92796  Ambrosia psilostachya Scott D. White 1995-12-19 3789 San Bernardino San Bernardino Mtns., Badger Canyon, NW of California State University San Bernardino 732 Comment
  UCR93555  Ambrosia psilostachya Scott D. White, Rob Johnson 1995-12-14 3780 San Bernardino San Bernardino Mtns., steep unnamed canyon east of Devil Canyon, c. 1.4 air mi north of San Bernardino State University & c. 1.2 air mi SW of peak mapped as 'Cloud, BM 3831'. 671 Comment
  UCR94911  Ambrosia psilostachya A. C. Sanders, P. MacKay 1996-10-20 19620 San Bernardino San Bernardino Mtns., Cajon Canyon, along Pacific Crest Trail/old highway from Cajon Junction to mouth of Crowder Canyon. 945 Comment
  UCR95771  Ambrosia psilostachya Lauren Raz, Steve Boyd 1996-10-23 004 Los Angeles Liebre Mtns, Entrance to Ruby Canyon on FS Rd 6N24, 1/10 mi from junction with Lake Hughes Road 610 Comment
  UCSB11818  Ambrosia psilostachya Breedlove, Dennis 1961-9-24 Los Angeles Middle Ranch Canyon, 0.5 mi. above Ben Weston Beach; Santa Catalina Island 60 Comment
  UCSB22609  Ambrosia psilostachya Wilken, Dieter 1968-5-20 Santa Barbara Refugio Beach 3 Comment
  UCSB28778  Ambrosia psilostachya Boyce, Carol 1970-8-13 Santa Barbara Coal Oil Point Reserve, 2 miles west of Goleta Point on west campus, UCSB Comment
  UCSB31879  Ambrosia psilostachya Ferren, Wayne 1978-7-18 Santa Barbara Along margin of Apple Road; Carpinteria Salt Marsh Reserve, Carpinteria Comment
  UCSB34749  Ambrosia psilostachya Steele, Kelly; Koehler, D.; Gordon, P. 1980-4-30 Santa Barbara Southwest intersection of Storke Road and El Colegio, and adjacent to Isla Vista, on northern portion of West Campus, UCSB Comment
  UCSB36379  Ambrosia psilostachya Bagley, Mark 1973-5-28 Santa Barbara 70 yards west of Coal Oil Point Reserve, UCSB 1 Comment
  UCSB39199  Ambrosia psilostachya Ferren, Wayne 1979-8-16 Santa Barbara Along N side of Sand Point Rd.; sand spit along margin of Carpinteria Salt Marsh, Carpinteria Comment
  UCSB39569  Ambrosia psilostachya Steele, Kelly; Roberts, Fred 1981-10-9 Santa Barbara More Mesa; along the Pacific Ocean, south of Atascadero Creek, adjacent to and west of Hope Ranch Park, ca. 3 km. southeast of Goleta; (border Areas 3D, 2C) 40 Comment
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Apr 11 2009
  UCSB42466  Ambrosia psilostachya Pierce, Lars 1982-6-8 Santa Barbara Along access road to Goleta Slough, west of airport next to Los Carneros Creek 4 Comment
  UCSB45945  Ambrosia psilostachya Roos, Alfred 1937-11-15 San Bernardino Loma Linda Comment
  UCSB49982  Ambrosia psilostachya Reisentz, Paul 1980-8-30 Ventura At northeastern end of property; Mirror Lake, 1/2 mile south of intersection of Hwy. 150 and Hwy. 33, 3 miles SW of Ojai, 12 miles N of Ventura 190 Comment
  UCSB52398  Ambrosia psilostachya Roberts, Fred 1982-10-4 Orange Laguna Niguel; Niguel Hill, 2.7 km. NNE Aliso Peak; 1.5 km. WNW Alicia Fire Station 160 Comment
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Jan 25 2020
  UCSB56397  Ambrosia psilostachya Pritchett, David 1986-8-19 Santa Barbara Del Sol Vernal Pool Reserve, SE corner El Colegio Rd. and Camino Lindo, Isla Vista 9 Comment
  UCSB56609  Ambrosia psilostachya Moles, R. 1988-5-30 Santa Barbara Corner of Hollister Ave. and Los Carneros Rd., Goleta 15 Comment
  UCSB6326  Ambrosia psilostachya Kraebel, C. 1931-9-27 San Bernardino Devil Canyon; San Bernardino Forest 822 Comment
  UCSB65409  Ambrosia psilostachya Magney, David 1983-7-27 Ventura Western Transverse Ranges: Devil's Heart Peak Quad.; SW1/4, SW1/4, S22, T6N, R20W, San Bernardino BM; along Sespe Hot Springs Rd./Trail, 1/8 mi. N of Johnson Ridge Trail junction 822 Comment
  UCSB67706  Ambrosia psilostachya Webb, M. 2003-10-29 Santa Barbara Manzanita Village, Z5 vernal marsh border Comment
  UCSB69771  Ambrosia psilostachya Ferren, Wayne 1984-10-11 Santa Barbara Santa Ynez River Estuary. West side of bridge washout on Santa Ynez River Estuary 1 Comment
  UCSB9148  Ambrosia psilostachya Ballard 1954-10-26 Riverside 3 miles south of Men's Reform School (Chino Institute), Chino 182 Comment
  UCSB9150  Ambrosia psilostachya Beeks, Richard 1951-10-22 Santa Barbara Sandyland; west of Carpinteria along railroad Comment
  UCSB9829  Ambrosia psilostachya Mooring, John 1947-11-3 Santa Barbara Hendry's Beach, Santa Barbara Comment
  VVC14  Ambrosia psilostachya A. C. Sanders, J. Mac 1996-10-20 19620 San Bernardino San Bernardino Mtns., Cajon Canyon, along Pacific Crest Trail/old highway from Cajon Junction to mouth of Crowder Canyon. 945 Comment
  CAS-BOT-BC136454  Ambrosia psilostachya Doreen Smith 2002-9-26 s.n. Marin Terra Linda. Comment
  CAS-BOT-BC162740  Ambrosia psilostachya Doreen Smith 2001-8-15 s.n. Marin Richards Bay Comment
  CAS-BOT-BC45013  Ambrosia psilostachya John Thomas Howell 1927-10-29 3175 Los Angeles Near Alamites Bay Comment
  CAS-BOT-BC45016  Ambrosia psilostachya Peter H. Raven; Henry J. Thompson 1959-10-18 14674 Los Angeles Near mouth of Malibu Creek on north arm of Malibu Lake. 220 Comment
  CAS-BOT-BC45017  Ambrosia psilostachya Catherine Best 1978-9-7 s.n. Marin Railroad yard Tiburon Comment
  CAS-BOT-BC45018  Ambrosia psilostachya Catherine Best 1978-10-21 s.n. Marin Old railroad yard in Tiburon Comment
  CAS-BOT-BC45019  Ambrosia psilostachya John Thomas Howell 1945-9-2 21449 Marin San Rafael Comment
  CAS-BOT-BC45020  Ambrosia psilostachya John Thomas Howell 1926-9-9 2189 Marin San Rafael Comment
  CAS-BOT-BC45023  Ambrosia psilostachya John Thomas Howell 1953-8-5 39912 Monterey Along Watsonville- San Juan Road about 2 miles south of Aromas. Comment
  CAS-BOT-BC45028  Ambrosia psilostachya E. K. Abbott 1889-8-1 s.n. Monterey Salinas River near Hilltown Bridge 9 Comment
  CAS-BOT-BC45029  Ambrosia psilostachya Harriet Hutton 1913-10-1 s.n. Monterey Monterey, Carmle Bay Comment
  CAS-BOT-BC45030  Ambrosia psilostachya David D. Keck 1933-11-10 2723 Napa 5 mi S of Napa, along highway to Vallejo Comment
  CAS-BOT-BC45031  Ambrosia psilostachya David D. Keck 1933-11-10 2723 Napa 5 mi S of Napa, along highway to Vallejo Comment
  CAS-BOT-BC45032  Ambrosia psilostachya Peter H. Raven 1951-9-9 3899 Napa Near Slaughterhouse Point, Napa River 0 Comment
  CAS-BOT-BC45057  Ambrosia psilostachya Gordon H. True 1969-10-14 3331 Nevada Dry Creek, just east of Nevada Co. line and about 1/2 mile below Spenceville (site) 95 Comment
  CAS-BOT-BC45058  Ambrosia psilostachya Gordon H. True 1969-10-23 5158 Nevada Wolf Creek at bridge ca. 1 mile west of Higgins Corner 426 Comment
  CAS-BOT-BC45062  Ambrosia psilostachya David D. Keck 1933-10-3 2539 Orange Sunset Beach Comment
  CAS-BOT-BC45065  Ambrosia psilostachya Carl B. Wolf 1932-7-7 3841 Orange Bryant Ranch, Bixby Ave, south edge of field 2/10 mi W of Hansen Rd 152 Comment
  CAS-BOT-BC45067  Ambrosia psilostachya Georgia Bentley 1919-9-1 s.n. Sacramento Vicinity of Sacramento Comment
  CAS-BOT-BC45069  Ambrosia psilostachya Walter Knight; Irja Knight 1963-9-3 306 Sacramento Levee near Courtland Comment
  CAS-BOT-BC55526  Ambrosia psilostachya W. R. Dudley 1902-9-21 s.n. San Mateo On causeway over Crystal Springs Reservoir Comment
  CAS-BOT-BC55527  Ambrosia psilostachya W. R. Dudley 1902-9-21 s.n. San Mateo On causeway over Crystal Spring Reservoir Comment
  CAS-BOT-BC55529  Ambrosia psilostachya Ellwood s.n. Santa Barbara unspecified Comment
  CAS-BOT-BC55534  Ambrosia psilostachya W. R. Dudley 1903-1-3 s.n. Santa Barbara Santa Barbara Comment
  CAS-BOT-BC55537  Ambrosia psilostachya John Thomas Howell 1925-11-28 1575 Solano Napa highway near Vallejo Comment
  CAS-BOT-BC55540  Ambrosia psilostachya M. K. Bellue 1938-6-1 s.n. Sonoma Near Santa Rosa Comment
  CAS-BOT-BC55545  Ambrosia psilostachya Lowell Ahart 1984-9-22 4804 Sutter South Butte, Sutter Buttes. Deep wash that leads to the spring west of the homestead on the west side. 250 Comment
  CAS-BOT-BC55546  Ambrosia psilostachya Lowell Ahart 1985-10-19 5205 Sutter Dean Ranch, Sutter Buttes. About 1/2 miles south-east of the Dean Cabin. 243 Comment
  CAS-BOT-BC55548  Ambrosia psilostachya James R. Shevock 1976-11-11 5371 Tulare County road M-50, approximately 1 1/2 miles above Johnsondale 1584 Comment
  CAS-BOT-BC55550  Ambrosia psilostachya John Thomas Howell 1973-11-1 50285 Tulare Kaweah River at Three Rivers 243 Comment
  CAS-BOT-BC55553  Ambrosia psilostachya Cecil Hart 1922-9-12 s.n. Los Angeles Howard J. Smith nursery, Montebello Comment
  CAS-BOT-BC55568  Ambrosia psilostachya R. F. Hoover 1965-9-29 9689 San Luis Obispo San Luis Obispo, upper Monterey Street Comment
  CAS-BOT-BC55569  Ambrosia psilostachya John Thomas Howell 1964-6-28 40719 San Luis Obispo Coast highway 1 mile n. of Ragged Pt. Comment
  CAS-BOT-BC55572  Ambrosia psilostachya R. F. Hoover 1966-9-12 9996 San Luis Obispo Nipomo Creek southeast of Nipomo Comment
  CAS-BOT-BC55575  Ambrosia psilostachya Elizabeth McClintock; Paul Reeberg 1988-10-11 s.n. San Mateo San Bruno Mountains, north of Kennedy School 198 Comment
  CAS-BOT-BC55576  Ambrosia psilostachya John Thomas Howell 1951-8-21 28288 Yuba Near Comptonville 762 Comment
  CAS-BOT-BC55577  Ambrosia psilostachya Cherie L. Wetzel 1969-9-23 1046 Alameda Shillings Park Comment
  CAS-BOT-BC55578  Ambrosia psilostachya Cherie L. Wetzel 1969-7-10 955 Alameda Between Palomares Rd. and the Kaiser Plant abutting Swizzig's property Comment
  CAS-BOT-BC55579  Ambrosia psilostachya Cherie L. Wetzel 1969-10-26 1088 Alameda Above tile plant Comment
  CAS-BOT-BC55580  Ambrosia psilostachya Cherie L. Wetzel 1967-11-3 184 Alameda Alameda Creek at Mission Blvd. Comment
  CAS-BOT-BC55582  Ambrosia psilostachya John Thomas Howell 1954-9-5 30053 Amador Pine Grove 762 Comment
  CAS-BOT-BC55586  Ambrosia psilostachya Milo S. Baker 1946-9-4 11591 Colusa Butte Sink, along Gridley-Princeton Road Comment
  CAS-BOT-BC55591  Ambrosia psilostachya Peter Rubtzoff 1954-9-14 1762 Contra Costa Lower San Joaquin River, east of Antioch (sand dune area) Comment
  CAS-BOT-BC55616  Ambrosia psilostachya John Thomas Howell 1959-9-24 34953 Mendocino 5 miles east of Quincy on road to Portola Comment
Read comments
Feb 3 2019
  CAS-BOT-BC55621  Ambrosia psilostachya John Thomas Howell 1956-8-19 31776 San Francisco Waterfront St. near Mission Rock Terminal Comment
  CAS-BOT-BC55622  Ambrosia psilostachya John Thomas Howell 1956-9-30 31896 San Francisco Embarcadero and Townsend St. Comment
  CAS-BOT-BC55623  Ambrosia psilostachya E. E. Stanford 1926-8-31 5 San Joaquin Stockton Comment
  CAS-BOT-BC55625  Ambrosia psilostachya Mrs. W. J. Williamson 1919-9-2 345 Tuolumne Bear Creek 304 Comment
  CAS-BOT-BC64707  Ambrosia psilostachya Brandegee s.n. Tulare Tulare Plains Comment
  CAS-BOT-BC64720  Ambrosia psilostachya Roxana Stinchfield 1916-6-25 339 Yolo Buckeye Creek, College City -- Dunnigan Road Comment
  CDA19940  Ambrosia psilostachya R. Breckenridge 2002-7-3 PDR 1204564 Yolo Northern California; Co Rd 79 in Brooks. 0 Comment
  CDA20509  Ambrosia psilostachya D. Isle 2004-11-17 DI 2 -04 Colusa Northwestern California; Just N of Stony Creek, N of Stonyford and S of the Glenn county line. 344 Comment
  CDA29808  Ambrosia psilostachya M. K. Beyers, F. Favela, J. McDonnell 2009-8-29 209 Yolo Putah Creek. Downstream of the Monticello Dam, on sloping bank of the creek, adjacent to and on the same side as Highway 128. 0 Comment
  CDA34820  Ambrosia psilostachya David J. Keil 1986-9-27 19757 Ventura 7 miles north of junction with Lockwood Valley Rd. along California 33. 0 Comment
  CDA9990  Ambrosia psilostachya Greg Hinton 2007-10-9 PDR# 1374086 Glenn 4684 Co. Rd. 302, Willows 0 Comment
  HSC4610  Ambrosia psilostachya C. E. Fellows 1965-9-6 131 Los Angeles 2/10 mi. W of Las Virgenes Rd. on Mulholland Rd., N side Comment
  HSC81329  Ambrosia psilostachya D. A. Hoover 1985-9-4 678 San Bernardino Big Morongo Preserve; The Nature Conservancy, S of Morongo Valley: between the manager's residence and the Kiosk 762 Comment
  JEPS104501  Ambrosia psilostachya Jake Ruygt 1978-9-27 422 Napa .15 mi. west of Buhmann Ave. on Henry Rd 48 Comment
  JEPS41026  Ambrosia psilostachya W. L. Jepson 1940-10-4 20164 Ventura 2.5 mi nw of Ventura, near Los Sauces Creek Ventura; Sea Cliff Beach, Los Sauces Creek Comment
  JEPS41033  Ambrosia psilostachya W. L. Jepson 1891-9-1 Solano Lagoon Valley Pass Comment
  JEPS41037  Ambrosia psilostachya unknown Santa Cruz Comment
Read comments
Oct 31 2012
  JEPS7803  Ambrosia psilostachya Peter H. Raven 1951-9-9 3899 Napa near Slaughterhouse Point; Napa River 0 Comment
  LA210365  Ambrosia psilostachya John Lambrinos; 1996-1 96- 9 Santa Barbara Vandenberg Air Force Base 20.0 Comment
  LA31629  Ambrosia psilostachya Peter H. Raven; Henry J. Thompson 1959-10-18 14674 Unknown Comment
  LA91098  Ambrosia psilostachya T. A. Geissman; October 1969 TAG 101068 APMC Los Angeles Santa Monica Mountains, Triunfo Canyon, Malibu Comment
  OBI17095  Ambrosia psilostachya Robert F. Hoover 1966-9-21 9996 San Luis Obispo Nipomo Crk SE of Nipomo Comment
  OBI17096  Ambrosia psilostachya Robert F. Hoover 1965-9-29 9673 San Luis Obispo Santa Lucia Range. Tassajera Crk Comment
  OBI17099  Ambrosia psilostachya Robert F. Hoover 1965-9-29 9689 San Luis Obispo San Luis Obispo, upper Monterey St Comment
  OBI17100  Ambrosia psilostachya Morton Noble 1959-7-5 42 Santa Barbara Devereux School, Goleta Township 3 Comment
  OBI17659  Ambrosia psilostachya Kamran Alavi 1977-8-13 42 San Luis Obispo Turry Rd, SLO Comment
  OBI26709  Ambrosia psilostachya Katherine K. Muller 1955-10-26 731 Santa Barbara Santa Ynez River, 1/4 mi W of Buellton Comment
  OBI38207  Ambrosia psilostachya Eric Wise 1981-7-27 976 San Luis Obispo Greengate Ponds. Orcutt Rd Comment
  OBI49584  Ambrosia psilostachya David J. Keil 1986-9-27 19757 Ventura NW Ventura County, 7 mi N of jctn with Lockwood Valley rd along Calif 33 Comment
  OBI62146  Ambrosia psilostachya P. A. Holden 1968-8-11 529 San Luis Obispo Near entrance of Arroyo Grande Crk to ocean at Oceano Comment
  OBI79902  Ambrosia psilostachya D. R. Miller 2013-9-29 913 .1083 San Luis Obispo Along Railroad tracks in Paso Robles, Between 12th and 14th street. 300 Comment
  PGM1073  Ambrosia psilostachya Vern Yadon 1971-10-3 Monterey Northern Monterey County, Salinas River Mouth, SW of Mulligan Hill Comment
  PGM797  Ambrosia psilostachya Vern Yadon 2002-10-13 Monterey Salinas Valley, River Road 0.2 miles SE Highway 68, Near the Las Palmas development Comment
  POM129168  Ambrosia psilostachya W. J. Williamson 1919-9-2 345 Tuolumne Bear Creek. 305 Comment
  POM14305  Ambrosia psilostachya Philip A. Munz 1922-10-15 6542 Los Angeles Claremont. 366 Comment
  POM181653  Ambrosia psilostachya I. L. Wiggins 1929-10-5 4191 Fresno Roadside 2 miles northeast of Fresno. Comment
  POM202565  Ambrosia psilostachya Marcus E. Jones 1933-11-22 s.n. San Bernardino Victorville bridge. Comment
Read comments
Jan 5 2017
  POM266299  Ambrosia psilostachya J. C. Roos 1942-9-28 1716 Los Angeles Beverly Blvd. Los Angeles Comment
  POM289869  Ambrosia psilostachya Arthur L. Cohen 1936-12-26 722 Kern Irrigation ditch Baskersfield. 122 Comment
  POM294576  Ambrosia psilostachya Lyman Benson 1945-10-22 11903 Los Angeles Claremont. 335 Comment
  POM307076  Ambrosia psilostachya Henry J. Ramsey, Henry J. Ramsey 1937-8-19 1930 Los Angeles Below north Whittier Heights Comment
  POM47597  Ambrosia psilostachya I. M. Johnston s.n. Orange 3 mi. N of Balboa Comment
  POM4802  Ambrosia psilostachya D. L. Crawford 1929-07 s.n. Orange Coast hills and shore. Comment
  RSA0020543  Ambrosia psilostachya G. J. Hoffenberg 1928-7-24 s.n. Los Angeles El Segundo. Comment
  RSA0031761  Ambrosia psilostachya R. F. Thorne 1977-11-21 50813 Orange Santa Ana Mountains: San Juan Canyon at San Juan Hot Springs Comment
  RSA0092801  Ambrosia psilostachya Steven A. Junak 1999-9-18 SC- 4281 Santa Barbara Santa Cruz Island. W end of beach at Coches Prietos Anchorage, back beach. 3 Comment
  RSA11084  Ambrosia psilostachya C. B. Wolf 1927-11-5 1422 Sutter Junction of Garden City Highway and Reigo Road, 17 mi. no. of Sacramento. Feather River. Sacramento Valley. Comment
  RSA11130  Ambrosia psilostachya C. B. Wolf 1927-9-25 1373 San Benito San Bernito River at junction of Coast Highway and Chittenden Pass road. 46 Comment
  RSA116659  Ambrosia psilostachya W. R. Dudley 1902-9-21 s.n. San Mateo Plants of the Santa Cruz Mountain Peninsula. On caushway [?] over Crystal Springs Reservoir. Comment
  RSA127976  Ambrosia psilostachya Peter H. Raven, Henry J. Thompson 1959-10-18 14674 Los Angeles Santa Monica Mountains north arm of Malibu Lake 220 Comment
  RSA128053  Ambrosia psilostachya Peter H. Raven, Henry J. Thompson 1958-9-28 13730 Los Angeles Elysian Park. 198 Comment
  RSA155898  Ambrosia psilostachya Peter H. Raven 1959-4-19 14009 Ventura West of Pt. Mugu. 5 Comment
  RSA17887  Ambrosia psilostachya C. B. Wolf 1927-8-15 s.n. Merced 9 miles E of Los Bonos, San Joaquin Valley. Comment
  RSA18404  Ambrosia psilostachya C. B. Wolf 1927-7-28 700 Merced 11 mi. east of Los Banos. San Joaquin Valley. Comment
  RSA188003  Ambrosia psilostachya R. F. Thorne, Percy C. Everett 1965-6-24 35036 Los Angeles Santa Catalina Island. Lower Cottonwood Canyon 45 Comment
  RSA215885  Ambrosia psilostachya J. T. Howell 1956-8-19 31776 San Francisco Waterfront St. near Mission Rock Terminal, San Francisco. Comment
  RSA224010  Ambrosia psilostachya Cherie L. Wetzel 1969-10-26 1088 Alameda Niles Canyon and Vicinity. Above old Niles Canyon Road. Comment
  RSA279130  Ambrosia psilostachya R. F. Thorne, D. Propst, Mark Hoefs 1974-9-12 45101 Los Angeles Santa Catalina Island: near bridge over stream lower end of Cottonwood Canyon. 30 Comment
  RSA307082  Ambrosia psilostachya Henry J. Ramsey, Henry J. Ramsey 1937-8-19 1924 Los Angeles Between Walnut and Covina, near State school. Comment
  RSA311299  Ambrosia psilostachya R. F. Thorne, M. Z. Thorne 1972-6-30 42170 Los Angeles Johnson's pasture and down Gail Canyon, n of Claremont 487 Comment
  RSA34234  Ambrosia psilostachya C. B. Wolf 1927-11-5 1422 Sutter Junction of Garden City Highway and Reigo Road, 17 mi. no. of Sacramento. Feather River. Sacramento Valley. Comment
  RSA416985  Ambrosia psilostachya F. R. Fosberg 1930-6-23 s- 2959 Los Angeles Del Rey 2 Comment
  RSA416988  Ambrosia psilostachya Robert Gustafson 1980-8-29 1969 Los Angeles Ballona Wetlands, Area 2. Comment
  RSA416990  Ambrosia psilostachya Anstruther Davidson 1899-7-23 s.n. Los Angeles Brooks (flul?) near Santa Monica. Comment
  RSA416991  Ambrosia psilostachya Louis Greata 1900-08 3689 Los Angeles Uncultivated vallies. Los Angeles. Comment
  RSA416998  Ambrosia psilostachya Thekla Mohr 1911-1 s.n. San Luis Obispo Uncultivated valleys. Comment
  RSA41700  Ambrosia psilostachya F. R. Fosberg 1931-6-28 S- 5174 Ventura Mandalay Beach. Comment
  RSA417003  Ambrosia psilostachya Josephine Meyers 1932-09 s.n. Ventura Broome's Ranch, Coast Highway. Comment
  RSA417004  Ambrosia psilostachya Flossie Draper 1927-10-23 50 Sutter Found on level near Yurba City. Comment
  RSA488445  Ambrosia psilostachya Mark Hoefs, R. F. Thorne, D. Propst 1974-9-12 531 Los Angeles Santa Catalina Island. Cottonwood Stream above bridge at main road. 23 Comment
  RSA523311  Ambrosia psilostachya G. H. True 1937-10-12 839 Solano North of Vallejo. Roadside. 30 Comment
  RSA5243  Ambrosia psilostachya C. B. Wolf 1932-9-13 4031 Orange Bryant Ranch: Triangle of waste ground S of Bryant Ave., & 1/2 mi. west of Los Alamitos Blvd. (Triangle waste ground at NW corner of SW 1/4 sect. 30 T4S R11W) 8 Comment
  RSA550708  Ambrosia psilostachya Timothy S. Ross, Annette Ross 1991-7-29 5692 Los Angeles Elephant Hill, N most point of the Puente Hills, W Pomona. 229 Comment
  RSA5882  Ambrosia psilostachya C. B. Wolf 1932-9-16 4100 Los Angeles Bryant Ranch, 100 to 150 ft W of State Highway at SE corner of Pacific Western Oil Co. lease in 1705 acre portion 2 Comment
  RSA5939  Ambrosia psilostachya C. B. Wolf 1932-7-7 3841 Orange Bryant Ranch ; On Bixby Ave. 2/10 mi. W of Hansen Road. 9 Comment
  RSA5984  Ambrosia psilostachya C. B. Wolf 1932-9-13 4057 Los Angeles Bryant Ranch, 250 ft. S of N boundary & 100 ft. E of drainage ditch in SE 1/4 sect. 27 about 560 ft. east and 250 ft. S of NW corner of SE 1/4 sect. 27. 5 Comment
  RSA599025  Ambrosia psilostachya L. C. Wheeler 1967-11-11 s.n. Los Angeles San Gabriel Mountains: Placerita Canyon ca. 1/2 mi. beyond Oak of the Golden Dream (same location as spring collection) 518 Comment
  RSA617183  Ambrosia psilostachya R. G. Swinney 1989-8-23 s.n. Los Angeles San Gabriel Mountains, in and near Glendora Wilderness Park, Big Dalton Canyon. Big Dalton spreading grounds. 305 Comment
  RSA69486  Ambrosia psilostachya E. L. Paddock 1951-8-1 s.n. Orange Glidden Mill, Buena park, 1 mi. east of Hansen Road. Comment
  RSA783652  Ambrosia psilostachya J. D. Olmsted 1959-8-26 835 Orange Along road south of mouth of Black Star Canyon north of Rock Crushing Plant; Drainage area: to Santiago Reservoir. 305 Comment
  RSA795845  Ambrosia psilostachya UCSB Botanical Society 1978-9-15 34 Santa Barbara Edge of Apple Road towards south end; Carpinteria Salt Marsh Reserve, Carpinteria. Comment
  RSA88085  Ambrosia psilostachya J. T. Howell 1951-8-21 28288 Yuba Near Camptonville 762 Comment
  RSA92940  Ambrosia psilostachya Peter H. Raven 1951-9-9 3899 Napa Near slaughterhouse Point, Napa River. 0 Comment
  RSA93684  Ambrosia psilostachya F. W. Peirson 1920-7-28 4234 Ventura Coast about 3 miles west of Ventura. Comment
  RSA93685  Ambrosia psilostachya F. W. Peirson 1919-11-15 1318 Los Angeles East Villa St. near Allen St. Pasadena. Comment
  RSA93686  Ambrosia psilostachya F. W. Peirson 1920-12-29 5276 Riverside Murray Canyon near Palm Springs. Comment
  SD107837  Ambrosia psilostachya Robert F. Thorne, D. Propst & M Hoefs 1974-9-12 45101 Los Angeles Santa Catalina Island; near bridge over stream in lower end of Cottonwood Canyon. 29 Comment
  SD244566  Ambrosia psilostachya David Keil 1991-10-26 22677 Santa Barbara Vandenberg Air Force Base, North Base. Barka Slough, near eastern boundary of base along San Antonio Creek. Comment
  SD245242  Ambrosia psilostachya David Keil 1986-9-27 19757 Ventura 7 mi n of junction with Lockwood Valley Rd along California 33. Comment
  SD251653  Ambrosia psilostachya Steven A. Junak 1999-9-18 SC 4281 Santa Barbara Santa Cruz Island. West end of beach at Coches Prietos Anchorage, back beach. 3 Comment
  SD41395  Ambrosia psilostachya Edith A. Purer 1933-10-7 5594 Los Angeles Stabilized sand dunes, El Segundo. Comment
  SD5651  Ambrosia psilostachya Ralph W. Sumner Jul 1920 San Diego San Diego Comment
  SD8637  Ambrosia psilostachya Daniel Cleveland Jul 1881 San Diego El Cajon Grade. Comment
  SD90178  Ambrosia psilostachya Benjamin C. Stone Oct 1952 236 San Bernardino Bottomland 3 miles south of California Institute of Men, Chino. 245 Comment
  SDSU14411  Ambrosia psilostachya Eamon O'Regan 1991-7-8 San Diego DMC 46831 368759. T.5 0.5 mi S of Training Town. San Diego County, California. 91 Comment
  SDSU6274  Ambrosia psilostachya J. E. Fitch 1940-10-29 9146 Unknown Comment
  SEINET10616722  Ambrosia psilostachya R. Mitchell Beauchamp 2006-12-12 Beauchamp s.n. San Diego Oceanside. Rancho Gaujone Road. Wismer parcel. Comment
  SEINET10904994  Ambrosia psilostachya Mary Susan Taylor 1975-10-29 Taylor 977 Butte Butte Creek, ca. 2-500 yds S of Humbug Road, ca. 2 mi E of junction of the Skyway and Humbug Road; with Platanus racemosa, Rhus trilobata. Comment
  SEINET11844102  Ambrosia psilostachya S. A. Thompson, Rawlins, J. E. 1988-1 5268 Orange Cleveland National Forest, 3.8 mi E of San Juan Hot Springs on CA 74 370 Comment
  SEINET6734843 Image available Ambrosia psilostachya H. A. Walker 1906-1 483 Alameda Vicinity of Berkley Comment
  SEINET7987881  Ambrosia psilostachya Marguerite English 2003-5-2 42 San Diego Private property on Yucca road in Sherilton Valley, Cuyamaca Rancho State Park and Cleveland Natinal Forest Sround Sherilton Valley 1076 Comment
  SJSU11704  Ambrosia psilostachya K. D. Patton 1976-10-10 Santa Clara near Guadalupe Creek, 0.25 mi S of San Jose Airport, San Jose Comment
  SJSU1450  Ambrosia psilostachya C. W. Sharsmith 1953-11-29 6116 San Luis Obispo near town of Pismo Beach Comment
  UC1192148  Ambrosia psilostachya Herbert L. Mason 1945-8-17 12668 Solano 1.5 mi n of Rio Vista Comment
  UC1199257  Ambrosia psilostachya Joseph P. Tracy 1940-10-27 16796 Napa by roadside near Suscol 15 Comment
  UC1234577  Ambrosia psilostachya Peter H. Raven 1959-4-19 14009 Ventura w of, low spot just above salt marsh Point Mugu 4 Comment
  UC1321279  Ambrosia psilostachya R. F. Hoover 1966-9-21 9996 San Luis Obispo se of Nipomo; Nipomo Creek Comment
  UC1537065  Ambrosia psilostachya Gordon H. True Jr. 1937-10-12 839 Solano n of Vallejo 29 Comment
  UC1595405  Ambrosia psilostachya Tim Ross and Annette H. Ross 1991-7-29 5692 Los Angeles n-most point of, (rocky ridgetop, sw side) Puente Hills; San Dimas Quad., Pomona, Elephant Hill 228 Comment
  UC172604  Ambrosia psilostachya Dr. E. Palmer 1875-1 161 San Diego Comment
  UC176003  Ambrosia psilostachya Geo. R. Hall 1914-9-30 Orange Santa Ana Comment
  UC1927960  Ambrosia psilostachya David Keil 1986-9-27 19757 Ventura 7 mi N of junction with Lockwood Valley Road along California 33, Cuyama River. NW Ventura County Comment
  UC29418  Ambrosia psilostachya J. Burtt Davy Oct 1 1896-Jan 1 1900 2842 Los Angeles Pomona Comment
  UC29420  Ambrosia psilostachya F. T. Bioletti Aug 30 1891-Jan 1 1900 Sacramento Comment
  UC421706  Ambrosia psilostachya John Thomas Howell 2189 Marin near San Rafael Comment
  UC455694  Ambrosia psilostachya E. P. Unangst 1906-8-26 San Luis Obispo Comment
  UC53835  Ambrosia psilostachya Mrs. R. W. Summers 1885-9-7 San Luis Obispo Comment
  UC735736  Ambrosia psilostachya Charles B. Heiser Jr. 1947-7-22 Solano w of, along Southern Pacific RR tracks Davis Comment
  UC73989  Ambrosia psilostachya J. A. Sanford 220 San Joaquin Robert's Island Comment
  UC891354  Ambrosia psilostachya Milo S. Baker 1932-1-1 6025 Sonoma 3 mi s, towards Napa Sonoma Comment
  UC891355  Ambrosia psilostachya Mrs. W. J. Williamson 1920-9-2 345 Tuolumne Bear Creek 304 Comment
  UC896733  Ambrosia psilostachya Mary F. Spencer 1918-8-5 975 San Diego sandy hills San Diego 50 Comment
  UCD128764  Ambrosia psilostachya Frederica Bowcutt 1993-6-25 1638 Sacramento Delta Meadows River Park. About 25 miles S of Sacramento, 10 air miles W of Galt, and 1 air mile NE of Walnut Grove. Immed. E of Locke, in the Sacramento River Delta, N of the Delta Cross Channel. On old Southern Pacific railroad right-of-way. Along levee road parallel to side slough of Snodgrass Slough. 1 Comment
  UCD128765  Ambrosia psilostachya Frederica Bowcutt 1993-6-25 1638 Sacramento Delta Meadows River Park. About 25 miles S of Sacramento, 10 air miles W of Galt, and 1 air mile NE of Walnut Grove. Immed. E of Locke, in the Sacramento River Delta, N of the Delta Cross Channel. On old Southern Pacific railroad right-of-way. Along levee road parallel to side slough of Snodgrass Slough. 1 Comment
  UCD128819  Ambrosia psilostachya G. F. Hrusa 1992-8-26 9565 San Joaquin Caswell Memorial State Park. Immediately west of westernmost parking area. Comment
  UCD128821  Ambrosia psilostachya P. B. Kennedy 1921-9-26 s.n. Merced Swift Ranch. Comment
  UCD128825  Ambrosia psilostachya J. Sauer; M. Mathias 1975-10-23 5749 Los Angeles Arroyo Sequit, western Santa Monica. Mountains. Comment
  UCD128828  Ambrosia psilostachya J. M. Tucker 1950-8-26 . 1992 Yolo University arboretum, University of California, Davis. Comment
  UCD128831  Ambrosia psilostachya Collector unknown Date unknown s.n. Unknown County unknown: exact location unknown. Comment
  UCD38531  Ambrosia psilostachya Beecher Crampton 1955-10-13 3177 Yolo Davis. Comment
  UCSB27625  Ambrosia psilostachya Miller, D. 1975-11-20 Santa Barbara Along RXR tracks near old ice house Comment
  UCSB27670  Ambrosia psilostachya Lavinger, S. 1975-10-23 Ventura At Mando's Beach, 0.4 miles south from Faria State Park on Pacific Coast Highway Comment
  UCSB36448  Ambrosia psilostachya Koehler, D.; Gordon, P. 1980-5-20 Santa Barbara In field south of Devereux Rd.; west of North/South Rd.; southwest intersection of Storke Road and El Colegio, and adjacent to Isla Vista, on northern portion of West Campus, UCSB Comment
  UCSB39309  Ambrosia psilostachya 1978-9-15 Santa Barbara Edge of Apple Road towards south end; Carpinteria Salt Marsh Reserve, Carpinteria Comment
  UCSB43122  Ambrosia psilostachya Fletcher, Martin 1979-11-3 Santa Barbara At Bulito Beach 1 Comment
  UCSB46040  Ambrosia psilostachya Walker, R. 1980-5-29 Santa Barbara 220 m. SE of Carrillo Commons, 25 m. from beach, UCSB Campus, along road-edge 9 Comment
  UCSB51445  Ambrosia psilostachya Hodgson, John 1928-10 Los Angeles Peace Valley Meadow, L.A. County, Tejon Dist.; Santa Barbara Forest 914 Comment
  UCSB56911  Ambrosia psilostachya Pritchett, David 1987-10-30 Santa Barbara Black Rd., 0.45 mi. N of Hwy. 1 51 Comment
  UCSB6325  Ambrosia psilostachya Beach, Kay 1943-8-21 Los Angeles Volfe Canyon, 2100 trail crossing Comment
  UCSB6327  Ambrosia psilostachya Neill, W. 1959-7-29 Santa Barbara Campus of University of California, Santa Barbara Comment
  UCSB65282  Ambrosia psilostachya Magney, David; Wellonen, C. 2001-4-4 Santa Barbara Outer South Coast Ranges; Orcutt Quad., T9N, R35W, Punta De La Laguna, San Bernardino BM; between Solomon and Black Roads (~280-ac site); N of SR1, S of Santa Maria Airport, W of Orcutt, Plot #11 ~5,205 feet NW of Solomon Rd. bridge 49 Comment
  UCSB9147  Ambrosia psilostachya H. Wedberg 1958-7-14 346 Los Angeles collected at Faculty Hill, in the U. C. L. A. Campus Faculty Hill, U. C. L. A. Campus Comment
  UCSC000747  Ambrosia psilostachya Peter Kamb 1948-11-13 1303 Los Angeles Dalton Canyon below Dam Dalton Canyon, Dam - Pomona 183 Comment
  UCSC010929  Ambrosia psilostachya D. Styer 2016-8-26 1071 Monterey Fort Ord; Region N6; Salinas River Comment
  CAS-BOT-BC174664  Ambrosia psilostachya var. californica Timothy S. Ross; Steve Boyd 1994-7-7 8149 Los Angeles Upper Cienaga Canyon: South base of Liebre Mountain, just on the N side of the Kelly Ranch inholding (USFS map, 1958; Knapp Ranch, Angeles Nat'l Forest map, 1982) 1018 Comment
  CLARK-A1528-147  Ambrosia psilostachya var. californica John C. Roos 1951-9-24 5243 San Bernardino Loma Linda Comment
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Aug 20 2014
  IRVC21741  Ambrosia psilostachya var. californica Fred M. Roberts 1984-10-18 1429 Orange San Juan Canyon, 2.5km ENE San Juan Guard Station; 4.0km WNW Sitton Peak, Santa Ana Mountains 310 Comment
  IRVC25169  Ambrosia psilostachya var. californica Fred M. Roberts, Brenda Fugle 1986-10-1 3146 Orange Laguna Hills; creek channel along Cabot Rd. ca. 1.0km N Pacific Park Pkwy. Southern Coastal 99 Comment
  PASA826  Ambrosia psilostachya var. californica Sally Ellis 1939-10-2 Los Angeles Claremont Comment
  SDSU6280  Ambrosia psilostachya var. californica Joan Godsil 1952-9-29 514 San Bernardino 3 miles south of California Institution for men, Chino. 366 Comment
  UCSB9149  Ambrosia psilostachya var. californica Charles Crum 1958-7-15 26 Los Angeles collected along Mulholland Drive, between Sepulveda Road and Topanga Road, near Los Angeles Mulholland Drive, Sepulveda and Topanga Comment
  CDA10053  Ambrosia psilostachya var. californica Kinsley, Berry 1938-1-22 s.n. Merced Merced. 0 Comment
  IRVC19819  Ambrosia psilostachya var. californica J. Powell 1977-12-11 1345 Contra Costa 1mile E of Antioch. Comment
  IRVC440  Ambrosia psilostachya var. californica I. L. Wiggins 1965-11-6 20346 Orange Santa Ana Canyon, road side near well 14, Kraemer Oil Estates near end of [Esperanza Rd.]. Yorba Linda Comment
  IRVC9307  Ambrosia psilostachya var. californica B. T. Gittins 1966-8-9 1531 Yolo N side of Putah Creek; ca. 5 mi. W of Winters Comment
  IRVC9308  Ambrosia psilostachya var. californica B. T. Gittins 1966-8-9 1512 Yolo N side Putah Creek; just below Monticello Dam. Comment
  SEINET10474410  Ambrosia psilostachya var. californica Lowell Ahart 1985-10-19 Ahart 5205 Sutter Dean Ranch, Sutter Buttes. About 12 miles west of Marysville. Comment
  SEINET10474411  Ambrosia psilostachya var. californica Lowell Ahart 1984-10-22 Ahart 4825 Sutter On the south side of South Butte, Sutter Buttes, west of Marysville. Valley Grassland and Foothill Woodland; 150 to 500 m elev. 150 Comment
  SEINET10971204  Ambrosia psilostachya var. californica Mary Susan Taylor 1977-8-19 Taylor 1505 Butte Abundant in slough ca. 3 mi E of junction of Hwy 42 with Hwy 162, on Hwy 162, S of Chico; with huge population of Hibiscus californicus. 30 Comment
  UCSC001220  Ambrosia psilostachya var. californica Jerome S. Horton 1936-8-27 396 Ventura Sespe Creek near Little Sespe fork, above Fillmore Sespe Creek, Little Sespe fork, Fillmore 457 Comment



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