Search Results — 926 specimen records retrieved (719 records with coordinates)
Results for search: Scientific name=Ambrosia acanthicarpa (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-BC133199  Ambrosia acanthicarpa Dan S. Cooper 2010-6-13 610 -66 Los Angeles Western Transverse Range; eastern Santa Monica Mtns.: Forest Lawn Drive west of Griffith Park 155 Comment
  CAS-BOT-BC13538  Ambrosia acanthicarpa Dana York; Dana Uptain 1997-5-12 1819 Kings Ca 3 km S of Kettleman City, NW quadrant of I-5/ Route 41 interchange 90 Comment
  CAS-BOT-BC13541  Ambrosia acanthicarpa John Thomas Howell 1959-9-25 35025 Plumas Summit of Beckwourth Pass 1588 Comment
  CAS-BOT-BC13542  Ambrosia acanthicarpa John Thomas Howell 1959-9-25 34981 Plumas Portola 1478 Comment
  CAS-BOT-BC13545  Ambrosia acanthicarpa John H. Thomas 1954-7-9 4358 A Santa Clara Carnadero Creek at intersection of THomas Road, about 1 mile south of Gilroy. 60 Comment
  CAS-BOT-BC13550  Ambrosia acanthicarpa Ernest C. Twisselmann 1963-11-10 9089 Kern Twisselmann Road, 0.5 mile west of Highway 33, Devil's Den region 91 Comment
  CAS-BOT-BC13551  Ambrosia acanthicarpa Ernest C. Twisselmann 1963-11-10 9089 Kern Twisselmann Road, 0.5 mile west of Highway 33, Devil's Den region 91 Comment
  CAS-BOT-BC13553  Ambrosia acanthicarpa Ernest C. Twisselmann 1969-5-21 15404 Kern Red Rock Canyon, east fork of the canyon. 777 Comment
  CAS-BOT-BC13554  Ambrosia acanthicarpa Ernest C. Twisselmann 1969-10-16 16309 Kern Red Rock Canyon, main fork of west canyon (below Ricardo) 792 Comment
  CAS-BOT-BC13556  Ambrosia acanthicarpa John Thomas Howell 1962-7-12 38655 Kern 3 miles south of Kernville 822 Comment
  CAS-BOT-BC13557  Ambrosia acanthicarpa John Thomas Howell 1970-9-24 47369 Kern South of Bodfish. 853 Comment
  CAS-BOT-BC13558  Ambrosia acanthicarpa Evalyn L. Farnsworth 1964-8-6 261 Kern Farnsworth Ranch, 2.5 miles southwest of Glennville 883 Comment
  CAS-BOT-BC13560  Ambrosia acanthicarpa Alice Eastwood 1913-9-25 3514 Kern Bakersfield Comment
  CAS-BOT-BC13561  Ambrosia acanthicarpa Ernest C. Twisselmann 1969-10-16 16309 Kern Red Rock Canyon, main fork of west canyon (below Ricardo) 792 Comment
  CAS-BOT-BC13563  Ambrosia acanthicarpa Frank J. Kirby 609 -SP Kern Indian Wells Valley 701 Comment
  CAS-BOT-BC13565  Ambrosia acanthicarpa Le Roy Abrams 1899-1-1 470 Kern Rosedale Comment
  CAS-BOT-BC13566  Ambrosia acanthicarpa Le Roy Abrams 1899-9-22 s.n. Kern Rosedale Comment
  CAS-BOT-BC13567  Ambrosia acanthicarpa E. A. McGregor 1910-10-2 26 Kern Bakersfield Comment
  CAS-BOT-BC13568  Ambrosia acanthicarpa I. L. Wiggins 1929-10-6 4207 Kern 1 mile south of Bakersfield Comment
  CAS-BOT-BC13604  Ambrosia acanthicarpa Le Roy Abrams 1930-9-27 4088 Monterey Salinas River, Neponset [road] Comment
  CAS-BOT-BC13606  Ambrosia acanthicarpa Ira L. Wiggins 1965-11-6 20351 Orange Near Well No. 14, Kraemer Oil Estates, near end of road leading to Rancho Santa Ana. Comment
  CAS-BOT-BC13607  Ambrosia acanthicarpa Helen D. Geis Spring 1902 534 Orange Sant Ana Comment
  CAS-BOT-BC13608  Ambrosia acanthicarpa John Thomas Howell 1927-10-22 3164 Orange In Santa Ana River bottom, Santa Ana Canyon 152 Comment
  CAS-BOT-BC13609  Ambrosia acanthicarpa W. R. O. 1973-1 5 Riverside SW side of San Jacinto Valley, base of Mount Rudolf Comment
  CAS-BOT-BC13610  Ambrosia acanthicarpa D. E. Breedlove 1961-8-5 949 Riverside Along state highway 74, 5 miles east of Keen Camp, Hemet Valley, San Jacinot Mountains 1341 Comment
  CAS-BOT-BC13611  Ambrosia acanthicarpa Carl B. Wolf 1931-10-14 2459 Riverside Cabezon, San Gorgonia Pass. 518 Comment
  CAS-BOT-BC13612  Ambrosia acanthicarpa Carl B. Wolf 1931-10-14 2459 Riverside Cabezon, San Gorgonia Pass. 518 Comment
  CAS-BOT-BC13613  Ambrosia acanthicarpa L. R. Abrams 1926-3-26 11037 Riverside Palm Springs Comment
  CAS-BOT-BC13614  Ambrosia acanthicarpa Lewis S. Rose 1966-12-11 66094 Riverside Palm Springs 152 Comment
  CAS-BOT-BC13615  Ambrosia acanthicarpa Lewis S. Rose 1935-12-21 35679 Riverside Cabazon 609 Comment
  CAS-BOT-BC13616  Ambrosia acanthicarpa H. S. Gentry 1954-7-26 14252 Riverside Dripping Springs along route 79 Comment
  CAS-BOT-BC13617  Ambrosia acanthicarpa Alice Eastwood 1913-9-25 3502 San Bernardino Barstow Comment
  CAS-BOT-BC13618  Ambrosia acanthicarpa Javier Penalosa 1960-11-14 1001 San Bernardino Four (Kramers) Corners, the intersection of US 395 and 466. Near RR tracks. Comment
  CAS-BOT-BC13619  Ambrosia acanthicarpa Javier Penalosa 1960-11-14 996 San Bernardino Four (Kramers) Corners, the intersection of US 395 and 466. Near RR tracks. Comment
  CAS-BOT-BC13620  Ambrosia acanthicarpa J. Ewan 1930-10-17 2935 San Bernardino Near Devore, Cajon Pass 457 Comment
  CAS-BOT-BC13621  Ambrosia acanthicarpa Louis C. Wheeler 1933-11-11 2242 San Bernardino 3 miles N of Rialto near Lytle Creek. 441 Comment
  CAS-BOT-BC13622  Ambrosia acanthicarpa Louis C. Wheeler 1933-11-11 2242 San Bernardino 3 miles N of Rialto near Lytle Creek. 441 Comment
  CAS-BOT-BC13623  Ambrosia acanthicarpa S. B. Parish; W. F. Parish 1882-9-1 621 San Bernardino San Bernardino Valley Comment
  CAS-BOT-BC13624  Ambrosia acanthicarpa Roxana S. Ferris; Rimo Bacigalupi 1958-3-19 13206 San Bernardino Southern side of Dale Dry Lake, 21 miles E of Twenty-nine Palms Comment
  CAS-BOT-BC13625  Ambrosia acanthicarpa B. Pitzer; S. Bliss 1991-10-2 1827 San Bernardino Twentynine Palms Marine Corps Base, Sand Hill Artillery Range, ca 6.5 km SW of Surprise Spring & 9 km E of Landers 792 Comment
  CAS-BOT-BC13626  Ambrosia acanthicarpa A. C. Sanders; Mark A. Elvin 2003-10-5 27226 San Bernardino UC Burns Pinyon Ridge Preserve, big wash at Yucca Valley town limit off (above) Pioneertown Rd 1098 Comment
  CAS-BOT-BC13627  Ambrosia acanthicarpa Mrs. A. F. Buttle 1913-9-1 s.n. San Diego Warner's Hot Springs Comment
  CAS-BOT-BC13628  Ambrosia acanthicarpa S. G. Stokes 1895-6-20 s.n. San Diego Otay Valley Comment
  CAS-BOT-BC13629  Ambrosia acanthicarpa J. T. Howell 1927-11-25 3215 San Diego Central part of Borrego Valley 182 Comment
  CAS-BOT-BC13633  Ambrosia acanthicarpa Ernest C. Twisselmann 1959-11-2 5887 San Luis Obispo Southwest end of Oso Flaco Lake. 4 Comment
  CAS-BOT-BC13639  Ambrosia acanthicarpa Alice Eastwood 1906-6-13 280 Santa Barbara Santa Maria riverbed Comment
  CAS-BOT-BC13640  Ambrosia acanthicarpa Gertrude Sinsheimer 1927-9-1 s.n. Santa Barbara Sisquoc River near Santa Maria Comment
  CAS-BOT-BC13641  Ambrosia acanthicarpa Henry M. Pollard 1952-9-27 s.n. Santa Barbara Southern Pacific RR, Summerland Comment
  CAS-BOT-BC13646  Ambrosia acanthicarpa Ernest C. Twisselmann 1958-10-1 4843 Tulare Kern River and Kennedy Meadows 1889 Comment
  CAS-BOT-BC13649  Ambrosia acanthicarpa Ernest C. Twisselmann 1964-8-21 10016 Tulare Kern Plateau, South Fork of the Kern River at the lower end of Kennedy Meadows. 1889 Comment
  CAS-BOT-BC13650  Ambrosia acanthicarpa Ernest C. Twisselmann 1965-9-19 11594 Tulare The Pixley National Wildlife Refuge, lake on west side of the refuge. 68 Comment
  CAS-BOT-BC13651  Ambrosia acanthicarpa Ernest C. Twisselmann 1965-9-19 11594 Tulare The Pixley National Wildlife Refuge, lake on west side of the refuge. 68 Comment
  CAS-BOT-BC13652  Ambrosia acanthicarpa Ernest C. Twisselmann 1965-9-19 11594 Tulare The Pixley National Wildlife Refuge, lake on west side of the refuge. 68 Comment
  CAS-BOT-BC13653  Ambrosia acanthicarpa Ernest C. Twisselmann 1969-10-2 16267 Tulare San Joaquin Valley, Deer Creek, 8.4 miles east of Pixley. 121 Comment
  CAS-BOT-BC13654  Ambrosia acanthicarpa Ernest C. Twisselmann 1969-10-2 16267 Tulare San Joaquin Valley, Deer Creek, 8.4 miles east of Pixley. 121 Comment
  CAS-BOT-BC13658  Ambrosia acanthicarpa John Thomas Howell 1967-11-3 44064 Tulare About 4.5 miles ENE of Pixley. 83 Comment
  CAS-BOT-BC13659  Ambrosia acanthicarpa John Thomas Howell 1967-9-18 43764 Tulare Kern Plateau, recreation area, north end of Lamont Meadow. 1706 Comment
  CAS-BOT-BC13661  Ambrosia acanthicarpa John Thomas Howell; Gordon H. True 1967-9-21 43991 Tulare About 4.5 miles ENE of Pixley. 83 Comment
  CAS-BOT-BC13663  Ambrosia acanthicarpa John Thomas Howell; Gordon H. True 1967-7-5 43091 Tulare Kern Plateau, near road bridge on South Fork of Kern River in Kennedy Meadows 1828 Comment
  CAS-BOT-BC13664  Ambrosia acanthicarpa John Thomas Howell; Gordon H. True 1967-8-8 43520 Tulare Kern Plateau, along Chimney Creek, Lamont Meadow 1676 Comment
  CAS-BOT-BC13665  Ambrosia acanthicarpa John Thomas Howell; Gordon H. True 1967-8-10 43721 Tulare About 4.5 miles ENE of Pixley. Across road 104 from area at NW corner. 83 Comment
  CAS-BOT-BC13666  Ambrosia acanthicarpa John Thomas Howell; Gordon H. True 1969-9-28 46251 Tulare Road's End, Kern River Canyon 1097 Comment
  CAS-BOT-BC174355  Ambrosia acanthicarpa Richard R. Halse 2010-8-26 8089 Lassen Along State Hwy. 70 at Beckwourth Pass ca. 4.3 miles west of its junction with U.S. Hwy. 395 or 1.6 miles east of Sierra Valley 1584 Comment
  CAS-BOT-BC183914  Ambrosia acanthicarpa Dana York 1996-10-18 1619 Fresno Ca. 33 km NE of Fresno, ca. 6 km S-SW of Tollhouse, 1.8 km W-NW of Red Mtn. (headwaters of Dry Cr.) 395 Comment
  CAS-BOT-BC224908  Ambrosia acanthicarpa A. C. Sanders 2011-4-6 38991 Riverside Peninsular Range; Santa Ana Mtns. Region: Temescal Canyon, along Temescal Canyon Rd. 1.5 mi. NE (73 deg. ) of Glen Ivy Hot Springs, 0-0.4 mi. NE of I-15 crossing 320 Comment
  CAS-BOT-BC42851  Ambrosia acanthicarpa L. R. Abrams 1916-10-30 6376 Los Angeles near Azusa Comment
  CAS-BOT-BC42854  Ambrosia acanthicarpa Cecil Hart 1921-7-1 10 Los Angeles Howard & Smith's nursery, Montebello Comment
  CAS-BOT-BC42857  Ambrosia acanthicarpa George B. Grant 1897-10-4 s.n. Los Angeles Garvanza Comment
  CAS-BOT-BC42858  Ambrosia acanthicarpa J. Q. Adams 1910-10-1 s.n. Los Angeles Soldier's Home Comment
  CAS-BOT-BC42859  Ambrosia acanthicarpa H. J. Thompson; Peter H. Raven 1959-9-27 14508 Los Angeles Sepulveda Canyon, Santa Monica Mtns., 243 Comment
  CAS-BOT-BC42860  Ambrosia acanthicarpa J. Ewan 1931-11-11 s.n. Los Angeles Del Valle, Santa Clara River Valley 304 Comment
  CAS-BOT-BC42864  Ambrosia acanthicarpa Paul F. Covel 1938-8-13 1288 Mono Tioga Lodge on Mono Lake Comment
  CAS-BOT-BC42867  Ambrosia acanthicarpa Peter H. Raven 1951-6-30 3122 A Mono Mono Lake Post Office 1950 Comment
  CAS-BOT-BC42869  Ambrosia acanthicarpa Lewis S. Rose 1968-7-17 68148 Mono Lee Vining 2072 Comment
  CAS-BOT-BC42871  Ambrosia acanthicarpa G. Helmkamp; E. A. Helmkamp 1997-9-12 2415 Mono River Springs Lakes, 3.1 mi. NE of highway CA-120 on River Springs Road 1996 Comment
  CAS-BOT-BC42876  Ambrosia acanthicarpa Ernest C. Twisselmann 1970-10-9 17512 Fresno Warthan Creek at the Parkfield Road 594 Comment
  CAS-BOT-BC42886  Ambrosia acanthicarpa Ernest C. Twisselmann 1964-8-21 10059 Inyo Head of Nine Mile Canyon 1950 Comment
  CAS-BOT-BC42887  Ambrosia acanthicarpa John Thomas Howell 1963-8-21 40253 Inyo Bishop Creek 1950 Comment
  CAS-BOT-BC42888  Ambrosia acanthicarpa John Thomas Howell 1964-10-23 40988 Inyo Whitney Portal road 2255 Comment
  CAS-BOT-BC42890  Ambrosia acanthicarpa John Thomas Howell 1961-9-25 36973 Lassen East side of Beckwourth Pass 1554 Comment
  CAS-BOT-BC42891  Ambrosia acanthicarpa Margaret Williams; Steven Williams 1974-7-26 74 -L-10 Lassen Burned area near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CAS-BOT-BC42892  Ambrosia acanthicarpa Timothy S. Ross; Steve Boyd 1994-9-20 8238 Los Angeles 2 miles NW of Acton, S side of intersection Escondido Canyon Road & Red Rover Mine Road 902 Comment
  CAS-BOT-BC42893  Ambrosia acanthicarpa Timothy S. Ross; Steve Boyd 1994-9-20 8247 Los Angeles Upper Bouquet Canyon; ca 2225 m WSW of Lincoln Crest, and 2825 m E of Bouquet Reservoir, along Bouquet Canyon Road 993 Comment
  CAS-BOT-BC42896  Ambrosia acanthicarpa Ernest C. Twisselmann 1970-9-8 17483 Los Angeles Antelope Valley: Avenue A, 0.2 mi. E of 30th Street West 731 Comment
  CAS-BOT-BC42897  Ambrosia acanthicarpa Ernest C. Twisselmann 1956-9-14 3167 Los Angeles Upper end of Castaic Valley 1188 Comment
  CAS-BOT-BC42898  Ambrosia acanthicarpa Ernest C. Twisselmann 1956-9-14 3167 Los Angeles Upper end of Castaic Valley 1188 Comment
  CAS-BOT-BC42899  Ambrosia acanthicarpa J. Q. Adams 1910-10-1 s.n. Los Angeles Soldier's Home Comment
  CAS-BOT-BC42925  Ambrosia acanthicarpa Ernest C. Twisselmann 1970-10-9 17512 Fresno Warthan Creek at the Parkfield Road 594 Comment
  CAS-BOT-BC471208  Ambrosia acanthicarpa Erika M. Gardner; Jennifer Pilapil 2013-8-9 466 Kern Southern Sierra Nevada, Scodie Mountains, Sequoia National Forest. Along Horse Canyon Road, on the second switch-back, near large disturbed turnout 1718 Comment
  CAS-BOT-BC471214  Ambrosia acanthicarpa Erika M. Gardner; Erma Gardner 2013-9-18 479 Kern Southern Sierra Nevada, Scodie Mountains, Sequoia National Forest. Along Horse Canyon Road, on the first switch-back 1637 Comment
  CAS-BOT-BC475170  Ambrosia acanthicarpa Erika M. Gardner; Erma Gardner 2013-9-18 479 Kern Southern Sierra Nevada, Scodie Mountains, Sequoia National Forest. Along Horse Canyon Road, along the first switchback 1637 Comment
  CAS-BOT-BC61440  Ambrosia acanthicarpa John R. Hodgson 1928-10-4 56 Ventura Santa Barbara National Forest; creek bottom at upper gate Bailey place, Peace Valley 975 Comment
  CAS-BOT-BC61441  Ambrosia acanthicarpa Henry M. Pollard 1944-11-9 s.n. Ventura Ojai Railway yards, near end of the line Comment
  CAS-BOT-BC61442  Ambrosia acanthicarpa Ernest C. Twisselmann 1970-10-17 17543 Ventura Mouth of Mill Canyon at Lockwood Valley 1577 Comment
  CAS-BOT-BC61443  Ambrosia acanthicarpa Henry M. Pollard 1965-9-17 s.n. Ventura Lion Canyon Campground, Sespe Creek 914 Comment
  CAS-BOT-BC61444  Ambrosia acanthicarpa Henry M. Pollard 1965-10-13 s.n. Ventura Ventura River flood-plain east of Taylor Ranch pastures Comment
  CAS-BOT-BC61445  Ambrosia acanthicarpa Henry M. Pollard 1965-10-21 s.n. Ventura Southern Pacific R.R. (Ojai branch) near terminal, Ojai Comment
  CAS-BOT-BC61446  Ambrosia acanthicarpa Henry M. Pollard 1963-11-14 s.n. Ventura Camino Cielo, ridge of eastern Santa Ynez Mts. 1066 Comment
  CAS-BOT-BC61447  Ambrosia acanthicarpa Henry M. Pollard 1962-10-19 s.n. Ventura Southern Pacific Railroad, Oil Fields (near Ortonville) Comment
  CAS-BOT-BC61449  Ambrosia acanthicarpa Ernest C. Twisselmann 1970-10-17 17543 Ventura Mouth of Mill Canyon at Lockwood Valley 1577 Comment
  CDA15343  Ambrosia acanthicarpa G. F. Hrusa 1998-9-14 14821 Fresno San Joaquin Valley; +- 1/2 km. S on Bethel of corner of North & Bethel, SW outskirts of Sanger E of Fresno. Comment
  CDA17391  Ambrosia acanthicarpa G. F. Hrusa, P. Akers 2005-9-26 16695 Mono Sierra Nevada; E side of Hwy 395 at intersection of Hwy 89. 1554 Comment
  CDA23780  Ambrosia acanthicarpa Mike Lahti 2008-10-14 PDR# 1509229 Riverside Temecula. 0 Comment
  CDA30938  Ambrosia acanthicarpa M. Beyers 2010-8-27 799 Mono Highway 89. Monitor Pass. Approximately, 3.5-4 miles west of Highway 395. 2027 Comment
  CDA31116  Ambrosia acanthicarpa D. G. Kelch 2009-10-8 9 .648 Kings West of Lemoore, east of Lemoore NAS (Naval Air Station). Jackson Avenue, 1 kilometer east of Avenal Cutoff Road, south of Highway 198. Comment
  CDA32251  Ambrosia acanthicarpa M. Beyers 2010-8-27 793 Mono Highway 89. Monitor Pass. Approximately, 2 miles west of Highway 395. 2318 Comment
  CDA37213  Ambrosia acanthicarpa CDFA Staff 246 Kern Walker Pass Road. Comment
  CDA39778  Ambrosia acanthicarpa J. Willems 2013-11-25 s.n. Fresno Near Huron. 0 Comment
  CDA43122  Ambrosia acanthicarpa David J. Keil, V. L. Holland 1988-9-9 21115 San Luis Obispo North of Cayucos. West of Highway 1 on Villa Creek Road at site of partially constructed abalone farm. Comment
  CDA7824  Ambrosia acanthicarpa Larry Hendrickson 1997-9-15 954 San Diego San Felipe Valley Wildlife Area, California Department of Fish & Game.. 11.5 miles south of intersection of State Highway 79 and County Highway S-2. West of S-2 northwest of corner of ruderal area near eastern flank of Volcan Mountain. (33.1411 N, 116.5422 W) Comment
  CDA9952  Ambrosia acanthicarpa A. C. Browne 1955-9-13 Inyo Chidago Canyon . 0 Comment
  CDA9953  Ambrosia acanthicarpa R. D. Goeden, D. W. Ricker 1969-7-31 s.n. Riverside Peninsular Range; San Jacinto Mountains; Lake Hemet, along Highway 74 south of inlet. Comment
  CDA9954  Ambrosia acanthicarpa R. D. Goeden 1966-10-27 s.n. Riverside UCR Campus Comment
  CDA9955  Ambrosia acanthicarpa A. C. Browne 1952-10-2 San Bernardino El Cajon Pass. 0 Comment
Read comments
Feb 5 2017
  CDA9959  Ambrosia acanthicarpa L. O. Haupt 1948-10-13 Kings Hanford. 0 Comment
  CDA9960  Ambrosia acanthicarpa G. C. Fleischman 1945-10-21 Riverside Highway, Beaumont / Sunnymead. 0 Comment
  CHSC105641  Ambrosia acanthicarpa Lowell Ahart; John Dittes 2010-10-5 17301 Plumas On the east side of Highway 49, 830 feet north of the Plumas-Sierra county line, 2.7 miles (air) northeast of Loyalton, 6.9 miles (air) southwest of Vinton. 1508 Comment
  CHSC108483  Ambrosia acanthicarpa Naomi Fraga; Heidi Bigelow, Michael Denslow 2004-2-10 1016 Kern Sierra Nevada; Southern Sierra Nevada region: The Owens Peak Eastern Watershed. Indian Wells Steak House and Brewery. Along state highway 14. 793 Comment
  CHSC108503  Ambrosia acanthicarpa Naomi Fraga; Sarah J. De Groot 2003-10-20 999 Kern Sierra Nevada; Southern Sierra Nevada region: The Owens Peak Eastern Watershed. In the aqueduct road between Five Fingers and Short Canyon. 1037 Comment
  CHSC112647  Ambrosia acanthicarpa Lowell Ahart 2013-9-11 19026 Plumas On the west side of the paved road, on the north side of Antelope Lake, about 1/2 mile west of Antelope Creek, about 16 miles (air) northeast of Taylorsville. 1584 Comment
  CHSC26545  Ambrosia acanthicarpa James Henrickson 1971-10-14 7188 Los Angeles NE Claremont along Foothill Blvd. 457 Comment
  CHSC50813  Ambrosia acanthicarpa Vernon Oswald; Lowell Ahart 1990-7-25 4401 Plumas Vinton Cemetery on Hwy 70, 0.9 mi east of Vinton. 1524 Comment
  CHSC51348  Ambrosia acanthicarpa Vernon Oswald; Lowell Ahart 1990-10-11 4459 Butte Dark Canyon arm of Lake Oroville, about 4 miles south of Jarbo Gap. 259 Comment
  CHSC65288  Ambrosia acanthicarpa Vernon Oswald; Lowell Ahart 1995-8-14 7191 Lassen Modoc Plateau. Horse Lake Rd. (Lasen536) 1.8 mi W of Hwy. 395, N of Susanville. 1645 Comment
  CHSC66845  Ambrosia acanthicarpa Vernon Oswald 1996-10-3 8298 Lassen North of Susanville on Horse Lake Road (Lassen 546) 3.6 mi E of Hwy. 139. Modoc Plateau. 1554 Comment
  CHSC77181  Ambrosia acanthicarpa G. Schoolcraft 1998-9-14 2809 Lassen Flats N of Turtle Point. 1264 Comment
  CHSC93233  Ambrosia acanthicarpa John Dittes 2005-11-26 1298 Los Angeles Western Transverse Ranges; San Gabriel Mtns.; Big Tujunga Cyn; ca. 2.7 air-miles SE of Mt. McKinley, ca. 3.8 air-miles W of Big Tujunga Reservoir, ca. 3.6 air-miles NE of Mt. Gleason Jr. Highschool; wash of Big Tujunga Creek near Delta Flat Picnic Area. 512 Comment
  CHSC94862  Ambrosia acanthicarpa Lowell Ahart 2006-9-21 13341 Plumas On the sides of the paved Rocky Point Road, about 1/2 mile east of Portola. 1487 Comment
  CHSC95454  Ambrosia acanthicarpa LeRoy Gross; Valerie Soza, Neil Gilbert 2000-10-18 293 Los Angeles Verdugo Mountains: Hostetter Mountainway. 701 Comment
  CHSC99984  Ambrosia acanthicarpa L. P. Janeway 2008-8-2 9524 Lassen Modoc Plateau. Honey Lake Valley, 4.9 air km southeast of Standish, along Mapes Road 0.3 km east of Lambert Lane. 1222 Comment
  CLARK-A1528-144  Ambrosia acanthicarpa Oscar F. Clarke 1970-10-10 San Bernardino Comment
  CLARK-A1528-145  Ambrosia acanthicarpa Fred B. Essig 1966-9-12 Riverside Riverside Comment
  CLARK-A1528-1533  Ambrosia acanthicarpa John C. Roos 1965-9-26 Riverside San Jacinto Mountains Comment
  CLARK-A1528-161  Ambrosia acanthicarpa John C. Roos 1951-9-24 5242 San Bernardino Loma Linda Comment
Read comments
Aug 20 2014
  GMDRC1366  Ambrosia acanthicarpa J. Andre 2003-9-8 4324 San Bernardino Cima Dome: Mojave National Preserve; 0.7 mi west of Cima along Cima Rd. Elev. 4110 ft. 1253 Comment
  GMDRC2648  Ambrosia acanthicarpa J. Andre 2007-12-6 9235 San Bernardino Kelso Dunes: Kelso Dunes: along east side of Kelbaker Rd, approx 3.5 mi. S. of Kelso, growing in deep sandy bank (dune) along margin of large wash 34 deg. 58.127' N 115 deg. 38.678' W. Elev. 2322 ft. 708 Comment
  GMDRC2980  Ambrosia acanthicarpa J. Andre, Gilbert Ocampto, Steven Dreher, T. La Doux 2008-10-3 9914 San Bernardino New York Mountains: New York Mountains: along Ivanpah Rd, approx 0.3 miles WSW of Barnwell, Mojave National Preserve, USGS Castle Peaks 7.5 min. quad 35 deg. 17.308' N 115 deg. 14.595' W. Elev. 4849 ft. 1478 Comment
  GMDRC7376  Ambrosia acanthicarpa Mark Elvin 2005-9-24 4552 San Bernardino Little San Bernardino Mountains: UC Burns Pinyon Ridge Reserve, off Skyline Ranch Rd, ca. 2 mi. (air) ESE of Pioneertown, 1.5 mi. (air) NW of Yucca Valley, in Water Canyon Wash 1075 Comment
  GMDRC7823  Ambrosia acanthicarpa J. M. Andre 2015-10-4 33686 Inyo Eastern Sierra Nevada: along McMurry Meadow Rd, 3.4 mi. SW of junction with Glacier Lodge Rd, about 6 mi. SSW of Big Pine 1664 Comment
  HSC24945  Ambrosia acanthicarpa James Henrickson 1971-10-14 7188 Los Angeles NE Claremont along Foothill Blvd. 457 Comment
  HSC5654  Ambrosia acanthicarpa W. M. Kinch 1954-9-30 24 Los Angeles Padua Ave. N. Claremont; San Antonio Wash 335 Comment
  HSC5655  Ambrosia acanthicarpa L. S. Rose 1968-7-17 68148 Mono Lee Vining 2073 Comment
  HSC5656  Ambrosia acanthicarpa W. M. Kinch 1954-10-26 12 San Bernardino S. of Chino near Calif. Inst. for Men 183 Comment
  HSC67548  Ambrosia acanthicarpa J. P. Smith, J. O. Sawyer 1970-8-24 4618 Inyo 8.6 mi. E of Big Pine on SR 168 Comment
  HSC79016  Ambrosia acanthicarpa G. K. Helmkamp 1984-4-29 - 20 San Bernardino Big Morongo Canyon near the Riverside Co. line, 2 mi. below the Big Morongo Preserve headquarters, floor of main canyon to 0.25 mi. up a broad side canyon to the east. 701 Comment
  HSC82687  Ambrosia acanthicarpa James D. Morefield 1985-8-11 3067 Mono White Mtns., sandy saddle N of McAfee Creek near its mouth, 1.2 mi. N 40 deg. E of Red Mtn., Fishlake Valley drainage 1662 Comment
  IRVC15600  Ambrosia acanthicarpa T. W. Mulroy 1972-10-22 1090 San Bernardino Roadside of town of Joshua Tree. southern Mojave Desert Comment
  IRVC24009  Ambrosia acanthicarpa Fred M. Roberts, Gordon A. Marsh 1985-10-16 2464 Los Angeles Long Beach: Los Angeles River Channel between Willow St. and Pacific Coast Hwy, 3-4.5km from ocean, along margin of channeled river course in early successional riparian habitat, sandy soil. southern coastal 5 Comment
  IRVC24033  Ambrosia acanthicarpa Fred M. Roberts, Gordon A. Marsh 1985-10-16 2474 Los Angeles Long Beach: Los Angeles River Channel between Willow St. and Pacific Coast Hwy, 3-4.5km from ocean, along margin of channeled river course in early successional riparian habitat, sandy soil. southern coastal 5 Comment
  IRVC26842  Ambrosia acanthicarpa S. D. White 1996-12-26 4640 Riverside Perris area Perris Basin 427 Comment
  IRVC27491  Ambrosia acanthicarpa Mark A. Elvin 2004-5-2 3431 Orange Irvine: San Joaquin Freshwater Marsh, near Campus and University Drs., 1.7km (air) NNW UC Irvine campus center. Southern Coastal 3 Comment
  IRVC27537  Ambrosia acanthicarpa Mark A. Elvin 2004-9-28 3758 San Bernardino Ca. 200m W of Big Bear Lake along Hwy 18; around mile marker 40.0. San Bernardino Mountains 2073 Comment
  IRVC28302  Ambrosia acanthicarpa Mark A. Elvin 2005-9-24 4552 San Bernardino UC Burns Pinyon Ridge Reserve, off Skyline Ranch Rd. ca. 2 miles (air) ESE of Pinoneertown, 1.5 mi. (air) NW of Yucca Valley; Water Cyn wash. Southern Mojave Desert, Little San Bernardino Mtns 1075 Comment
  IRVC28437  Ambrosia acanthicarpa A. C. Sanders, Mark A. Elvin 2003-10-5 27226 San Bernardino UC Burns Pinyon Ridge Reserve; big wash at Yucca Valley town limit orr (above) Pioneertown Rd, and in mouth of large canyon from NE. Southern Mojave Desert 1098 Comment
  IRVC29738  Ambrosia acanthicarpa Mark A. Elvin 2006-10-23 5214 San Bernardino Pipes CanyonPreserve; Pipes Canyon, Pipes Creek, just upstream from the ranch house and parking lot. Southern Mojave Desert, Little San Bernardino Mtns 1379 Comment
  JEPS110456  Ambrosia acanthicarpa Lowell Ahart 2006-9-21 13341 Plumas On the sides of the paved Rocky Point Road, about 1/2 mile east of Portola 1487 Comment
  JEPS117161  Ambrosia acanthicarpa Lowell Ahart, John Dittes 2010-10-5 17301 Plumas On the east side of Highway 49, 830 feet north of the Plumas-Sierra county line, 2.7 miles (air) northeast of Loyalton, 6.9 miles (air) southwest of Vinton 1508 Comment
  JEPS119242  Ambrosia acanthicarpa Dana York 1996-10-18 1619 Fresno Ca. 33 km NE of Fresno, 6 km S-SW of Tollhouse, 1.8 km W-NW of Red Mountain (headwaters of Dry Creek). Comment
  JEPS120755  Ambrosia acanthicarpa Lowell Ahart 2013-9-11 19026 Plumas On the west side of the paved road, on the north side of Antelope Lake, about 1/2 mile west of Antelope Creek, about 16 air miles NE of Taylorsville. Comment
  JEPS19920  Ambrosia acanthicarpa C. N. Smith 1941-4-23 334 Kern near Adobe Canon; Greenhorn Mountains 441 Comment
  JEPS19961  Ambrosia acanthicarpa Frank W. Peirson 1918-10-16 271 Los Angeles in Pacoima Canyon 518 Comment
  JEPS20741  Ambrosia acanthicarpa Roxana S. Ferris and Rimo Bacigalupi Mar 19 1958-Mar 25 1958 13206 San Bernardino 21 mi e, s side of Dale Dry Lake Twenty-nine Palms; Dale Dry Lake Comment
  JEPS23683  Ambrosia acanthicarpa Peter H. Raven and Henry J. Thompson 1959-9-27 14508 Los Angeles Sepulveda Canyon; Santa Monica Mountains, Los Angeles 243 Comment
  JEPS23688  Ambrosia acanthicarpa Rimo Bacigalupi 1950-9-14 7327 Tulare 4 mi s, between SPR right-of-way and U.S. 99, 2 mi s of Cross RR Siding Traver 83 Comment
  JEPS26192  Ambrosia acanthicarpa Peter H. Raven and Henry J. Thompson 1959-10-4 14586 Ventura 1 mi N Camarillo State Hospital; Santa Monica Mountains, Calleguas Creek 18 Comment
  JEPS30680  Ambrosia acanthicarpa Peter H. Raven 1961-9-17 16678 San Bernardino near, n of Rialto Fontana Power Plant; Rialto 457 Comment
  JEPS36066  Ambrosia acanthicarpa Ernest C. Twisselmann 1964-8-21 10059 Inyo head of Nine Mile Canyon; Kern Plateau, Nine Mile Canyon 1950 Comment
  JEPS40936  Ambrosia acanthicarpa W. L. Jepson 1941-10-28 20649 Los Angeles 4-8 mi s-se of, near Caswell road station Gorman; Peace Valley 914 Comment
  JEPS40939  Ambrosia acanthicarpa Marjorie D. Clary 1932-10-2 1572 Riverside 6 mi w Indio; Colorado Desert, Point Happy 30 Comment
  JEPS40942  Ambrosia acanthicarpa W. L. Jepson 1941-10-28 20644 Los Angeles 4 mi nw, near the Newhall Tunnel of the S. P. Ry. San Fernando; Fremont Pass [San Fernando Pass] 518 Comment
  JEPS40943  Ambrosia acanthicarpa W. L. Jepson 1940-10-9 20221 Kern 1.5 mi N of, along rd to McKittrick Taft Comment
  JEPS40948  Ambrosia acanthicarpa R. F. Hoover 1938-10-23 3887 Madera Irrigosa Comment
  JEPS40949  Ambrosia acanthicarpa R. F. Hoover 1936-5-18 1109 Merced 10 mi w of Merced Comment
  JEPS40950  Ambrosia acanthicarpa R. F. Hoover 1934-10-21 165 Merced Livingston Comment
  JEPS40951  Ambrosia acanthicarpa R. F. Hoover 1940-10-5 4666 Lassen Wendel Comment
  JEPS40969  Ambrosia acanthicarpa W. L. Jepson 1940-10-9 20226 Fresno se of, sw Fresno County Coalinga; Jacalitos Creek Comment
  JEPS41027  Ambrosia acanthicarpa W. L. Jepson 1939-8-11 19380 Lassen Milford 1280 Comment
  JEPS41028  Ambrosia acanthicarpa W. L. Jepson 1939-8-11 19379 Lassen Milford 1280 Comment
  JEPS41041  Ambrosia acanthicarpa S. B. and W. F. Parish 1886-9-1 San Bernardino San Bernardino Valley Comment
  JEPS49060  Ambrosia acanthicarpa Lewis S. Rose 1966-12-11 66094 Riverside Palm Springs 152 Comment
  JEPS52245  Ambrosia acanthicarpa Ernest C. Twisselmann 1968-10-4 12808 Fresno mouth of, w Fresno County Los Gatos Canyon 251 Comment
  JEPS53977  Ambrosia acanthicarpa J. Thomas Howell 1967-11-6 44189 Merced 1 mi s, 11 mi s of Turlock, 14 mi e of Newman Stevinson Comment
  JEPS59942  Ambrosia acanthicarpa Lewis S. Rose 1968-7-17 68148 Mono sandy flats Lee Vining 2072 Comment
  JEPS60777  Ambrosia acanthicarpa Ernest C. Twisselmann 1969-10-16 16309 Kern below, main w fork of the canyon Ricardo; Mojave Desert, Red Rock Canyon 792 Comment
  JEPS64633  Ambrosia acanthicarpa Ernest C. Twisselmann 1970-9-8 17483 Los Angeles .2 mi e of, at Avenue A 30th Street West; Mojave Desert, Antelope Valley 731 Comment
  JEPS64709  Ambrosia acanthicarpa Ernest C. Twisselmann 1970-10-17 17543 Ventura at, mouth of Mill Canyon Lockwood Valley; San Emigdio Range, Mount Pinos Region, Mill Canyon 1577 Comment
  JEPS64710  Ambrosia acanthicarpa Ernest C. Twisselmann 1970-10-9 17512 Fresno at Parkfield Road; Warthan Creek 594 Comment
  JEPS95710  Ambrosia acanthicarpa Vernon H. Oswald and L. Ahart 1995-8-14 7191 Lassen T33N R14E SW1/4 Sec. 2, 5400 ft, Modoc Plateau, Sagebrush Scrub. Horse Lake Rd. (Lassen 536) 1.8 mi W of Hwy. 395, N of Susanville 1645 Comment
  JEPS95745  Ambrosia acanthicarpa Vernon H. Oswald and L. Ahart 1995-8-14 7191 Lassen T33N R14E SW1/4 Sec. 2, 5400 ft, Modoc Plateau, Sagebrush Scrub. Horse Lake Rd. (Lassen 536) 1.8 mi W of Hwy. 395, N of Susanville 1645 Comment
  JOTR30755  Ambrosia acanthicarpa Andre, Jim, Tasha La Doux 2007-9-6 8708 Riverside Joshua Tree National Park. Queen Valley, just E. of Geology Tour Rd. in July 2006 burn area. 1318 Comment
  JOTR35518  Ambrosia acanthicarpa La Doux, Tasha, M. Harding, T. Herskovits, D. Shade, B. Truesdell, M. Wheeler 2012-10-2 3338 Riverside Joshua Tree National Park. Queen Valley along Park Blvd, approx 400 m W of GeoTour Rd 1341 Comment
  JOTR36384  Ambrosia acanthicarpa La Doux, Tasha, M. Harding, T. Herskovits, D. Shade, B. Truesdell, M. Wheeler 2012-10-2 3338 Riverside Joshua Tree National Park. Queen Valley along Park Blvd, approx 400 m W of GeoTour Rd 1341 Comment
  LA200148  Ambrosia acanthicarpa John O'Leary; 1974-5-3 278 Los Angeles Santa Monica Mountains, Brown Canyon, along Beverly Glen Blvd Comment
  LA211621  Ambrosia acanthicarpa Mark A. Elvin; 2014-10-22 7747 Ventura Oxnard Plain, Near junction Pleasant Valley Road and Pancho Road, area between roads and ag field. 40.0 Comment
  LA50811  Ambrosia acanthicarpa Peter H. Raven; Henry J. Thompson 1960-7-17 15561 Los Angeles Santa Monica Mountains, Saddle Peak, shoulder of peak, 1 mi E of summit 609 Comment
  NY44078  Ambrosia acanthicarpa C. R. Annable 1995-7-16 2572 Inyo BLM: Bishop District, Round Valley Comment
  OBI17114  Ambrosia acanthicarpa Lewis S. Rose 1966-12-11 66094 Riverside Palm Springs 152 Comment
  OBI28965  Ambrosia acanthicarpa David J. Keil 1976-12-12 11892 Los Angeles 5 mi W of San Bernardino Co line along Calif rte 138 Comment
  OBI2950  Ambrosia acanthicarpa Lewis S. Rose 1968-7-17 68148 Mono Lee Vining 2073 Comment
  OBI36523  Ambrosia acanthicarpa Mark Schneider 1974-1-3 s.n. San Bernardino 7 Hills Ranch, Avocado orchard, Tujunga, San Bernardino mts 549 Comment
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Feb 18 2017
  OBI37566  Ambrosia acanthicarpa Oscar F. Clarke 1970-10-1 s.n. San Bernardino Along 29 Palms Hwy about 4 mi E of Old Dale Rd intersection and about 20 mi E of 29 Palms Comment
  OBI49598  Ambrosia acanthicarpa David J. Keil 1986-9-27 19741 -2 Los Angeles NW Los Angeles Cnty. along I-5, just S of Hungry Valley rd exit. Roadside pullout 914 Comment
  OBI50618  Ambrosia acanthicarpa Sue Weis, Susan Draper 1993-7-5 161 Santa Barbara Vandenberg AFB, E of 13th St bridge Comment
  OBI60082  Ambrosia acanthicarpa George Butterworth 1997-11-17 186 San Luis Obispo T11N, R25W, S36.Beside Soda Lake Rd, 0.4 mi N of Elkhorn Rd Comment
  OBI65221  Ambrosia acanthicarpa Greg Wilvert 2005-10-5 530 San Luis Obispo SE Half of the Caliente Range. 2.0 km E of Lawson Spring along Padrones Cyn Rd 844 Comment
  OBI71941  Ambrosia acanthicarpa George Butterworth 2009-11-5 762 San Luis Obispo Chimineas. Cuyama River, Oakey 495 Comment
  OBI74448  Ambrosia acanthicarpa David J. Keil, with V. L. Holland 1988-9-9 21115 San Luis Obispo North of Cayucos. West of Highway 1 on Villa Creek Road at site of partially constructed abalone farm 20 Comment
  OBI7449  Ambrosia acanthicarpa David J. Keil, Malcolm G. McLeod & T. A. Gaskin 1976-10-3 11841 Kern 4.3 mi SE of jctn with Barker Rd and Twisselman Rd on Keck Rd Comment
  OBI75606  Ambrosia acanthicarpa David J. Keil 1988-8-24 21030 Mono West shore of Mono Lake and adjacent slopes ca. 2 miles north of Lee Vining along Hwy 395. 2000 Comment
  OBI77036  Ambrosia acanthicarpa George Butterworth 1994-11-27 8 San Luis Obispo Carrizo Plain Natural Area. T11N R26W S13,.9 mi S of Soda Lake Rd and L. E. Traver Ranch, beside rd 701 Comment
  OBI79471  Ambrosia acanthicarpa David J. Keil 2011-11-26 31201 San Luis Obispo Highway 58 east of junction with Highway 229. Lower part of Calf Canyon 415 Comment
  OBI79875  Ambrosia acanthicarpa David J. Keil 2012-7-18 31451 B San Luis Obispo Santa Maria River bed at Highway 1 bridge, just north of Guadalupe and Santa Barbara County line 22 Comment
  OBI80672  Ambrosia acanthicarpa David J. Keil 1992-10-19 23844 San Luis Obispo Laguna Lake Park. Prefumo Canyon inlet. 170 Comment
  OBI82119  Ambrosia acanthicarpa R. G. Swinney 2009-11-13 11611 Los Angeles Transverse Range; San Gabriel Mountains/Mojave Desert: confluence of Kentucky Springs Canyon and Soledad Canyon, 2.6 mi. SW of Vincent train station 921 Comment
  POM12468  Ambrosia acanthicarpa Philip A. Munz 1922-8-21 6129 San Bernardino San Bernardino Mountains: Santa Ana River 1982 Comment
  POM182393  Ambrosia acanthicarpa Joseph A. Ewan 1931-11-11 5299 Los Angeles Del Valle, Santa Clara River Valley. 305 Comment
  POM229352  Ambrosia acanthicarpa Philip A. Munz 1943-12-28 17245 San Bernardino Sand dunes 1 mile north of Twentynine Palms schoolhouse. Comment
  POM258897  Ambrosia acanthicarpa E. C. Jaeger 1938-10-8 s.n. San Bernardino Mojave River at entrance to Cave Canyon 610 Comment
  POM262996  Ambrosia acanthicarpa J. C. Roos 1940-9-28 233 San Bernardino Loma Linda. Comment
  POM263162  Ambrosia acanthicarpa J. C. Roos 1937-8-19 359 Riverside Thomas Valley, San Jacinto Mts. Comment
  POM289593  Ambrosia acanthicarpa Lyman Benson 1935-10-19 7514 Kern 2 miles north of Greenfield. Kern Lake watershed. 122 Comment
  POM289594  Ambrosia acanthicarpa Lyman Benson 1931-11-1 2926 Kern Bakersfield, Kern River. 122 Comment
  POM295623  Ambrosia acanthicarpa Lyman Benson 1953-10-19 15254 San Bernardino 1 mi. NE of Canjon Pass. 1220 Comment
  POM310456  Ambrosia acanthicarpa Margaret Hardinge 1945-10-8 96 San Bernardino Cajon pass near Devore. 762 Comment
  POM319667  Ambrosia acanthicarpa Patricia Wilder 1971-9-29 5263 Riverside Along San Jacinto River at north end of Fairview Street, north of Florida Street, Valle Vista; east of Hemet. On dry river bed. 518 Comment
  POM320502  Ambrosia acanthicarpa Patricia Wilder 1970-10-15 4767 Riverside Prado Dam at base of dam in Prado Flood Control Basin. East of Chino Hills. 152 Comment
  POM50433  Ambrosia acanthicarpa George D. Abrams 1899-9-22 s.n. Kern Rosedale. Comment
  POM70018  Ambrosia acanthicarpa Marcus E. Jones 1924-10 s.n. Riverside Whitewater Comment
  RSA0020207  Ambrosia acanthicarpa Duncan S. Bell, Grace Cho 2013-9-17 5901 San Bernardino Bighorn Mountains; collecting in Rattlesnake Canyon, approximately 1.75 air miles north northeast of Vaughn Spring. 1502 Comment
  RSA0021315  Ambrosia acanthicarpa Duncan S. Bell 2010-11-26 2012 San Bernardino Sawtooth Mountains; Chaparrosa Spring, approximately 1.5 air miles southwest of Pioneertown. 1291 Comment
  RSA0025145  Ambrosia acanthicarpa Duncan S. Bell, Amanda Turek 2010-9-4 1917 San Bernardino Sawtooth Mountains; collecting in Sorrel Horse Canyon, about 1.25 air miles west of Pioneertown. 1248 Comment
  RSA0027879  Ambrosia acanthicarpa Greg Wilvert 2005-10-5 530 San Luis Obispo Southeast half of the Caliente Range: 2.0km E of Lawson Spring along Padrones Canyon Rd. 844 Comment
  RSA0035614  Ambrosia acanthicarpa Jon P. Rebman, W. Schmidtmann, G. Kenney 2014-5-8 28317 San Diego Camp Pendleton: Training Area India: eastern portion of Base; along the Santa Margarita River just southwest of the De Luz Road crossing. Square D6. 35 Comment
  RSA0036394  Ambrosia acanthicarpa Nick Jensen 2014-8-27 2430 Kern Tejon Ranch. Along Contour Rd, lower end of Canyon de los Gatos Montes. 1164 Comment
  RSA0039054  Ambrosia acanthicarpa R. G. Swinney 2009-11-16 11624 Los Angeles 20 m east (up canyon) from east edge of Kentucky Springs, tributary of Kentucky Springs Canyon, 3/4 mile W of Angeles Forest Hwy at Angeles National Forest boundary, 0.4 mi. west of junction of Mt. Emma Rd. and Angeles Forest Hwy 1122 Comment
  RSA0042136  Ambrosia acanthicarpa Nick Jensen, Ed Kentner 2013-2-22 153 Kern San Joaquin Valley, Between the Temblor Range and the Antelope Hills, Twisselman Ranch, south of Highway 46 and west of Highway 33. 220 Comment
  RSA0042769  Ambrosia acanthicarpa George K. Helmkamp, Elizabeth A. Helmkamp 2013-8-14 22169 Alpine Northern Sierra Nevada Mountains: Along CA-89, 0.6 mile south of Markleeville. 1691 Comment
  RSA0049482  Ambrosia acanthicarpa Richard G. Swinney 2010-8-16 13520 Los Angeles San Gabriel Mountains: Arcadia, Big Santa Anita Canyon, Arcadia Wilderness Park. 280 Comment
  RSA0050245  Ambrosia acanthicarpa J. M. Andre 2013-8-28 25465 San Bernardino Mojave National Preserve; along Cedar Canyon Rd, 4.1 mi. east of Jct w/Cima Rd, at Cedar Wash crossing 1402 Comment
  RSA0054194  Ambrosia acanthicarpa Ann Howald 2011-9-2 2816 Mono Eastern Sierra Nevada Mtns. Hwy 89, c. 0.2 mi east of gulch with white firs. 2000 Comment
  RSA0064305  Ambrosia acanthicarpa LeRoy Gross, Loraine Washburn 2015-4-30 7290 Ventura Vulcan Property; End of Torrey Road/Main street, south of Highway 126, and Piru. Surveyed up stream. 193 Comment
  RSA0068366  Ambrosia acanthicarpa Nick Jensen, Neal Kramer 2014-9-7 2498 Kern Tejon Ranch. Along Lower Tejon Creek in Upper Globe Pasture. 274 Comment
  RSA0073637  Ambrosia acanthicarpa Jim M. Andre 2011-9-29 20992 San Bernardino Mojave National Preserve; SE end of Kessler Peak near Billy Boy Mine, Ivanpah Mtns, 0.9 mi. N. of Morningstar Mine Rd, 4.9 mi. N. of town of Cima. 1324 Comment
  RSA0077498  Ambrosia acanthicarpa Erika M. Gardner, Jennifer Pilapil 2013-8-9 466 Kern Along Horse Canyon Road, on the second switch-back, near large disturbed turnout. 1718 Comment
  RSA0080649  Ambrosia acanthicarpa R. G. Swinney 2010-5-29 13009 Los Angeles May Canyon Truck Trail (FSRd. 3N54) crossing of W. Fork May Canyon, north side of rd., c. 1.3 air miles NNW of road's entrance at Veterans Memorial Park in Sylmar. 939 Comment
  RSA0083055  Ambrosia acanthicarpa Erika M. Gardner, Erma Gardner 2013-9-18 479 Kern Along Hose Canyon Road, along the first switchback. 1637 Comment
  RSA0086783  Ambrosia acanthicarpa R. G. Swinney 1967-5-26 14064 Riverside White Water Bench. 305 Comment
  RSA0092767  Ambrosia acanthicarpa Nick Jensen, Evan Meyer, LeRoy Gross 2015-3-30 3361 Kern Large wash just north of and feeding into Comanche Creek. East side of the Tejon Hills. 279 Comment
  RSA0093524  Ambrosia acanthicarpa George K. Helmkamp, Amy Barnes 2014-8-27 23029 Alpine Northern Sierra Nevada Mountains. West Fork Carson River canyon, along highway CA-88/Carson Pass Hwy, 2.6 miles east of the junction with Hwy 89/Luther Pass Rd. 1994 Comment
  RSA0105210  Ambrosia acanthicarpa R. G. Swinney 2011-10-27 15925 Los Angeles San Gabriel Mountains: West Fork San Gabriel River, c. 300 meters east (downstream) of entrance gate to Cogswell Dam, between FS Rd 2N25 and the stream. 649 Comment
  RSA0106485  Ambrosia acanthicarpa R. G. Swinney 2011-10-18 15822 Los Angeles San Gabriel Mountains: 0.1-0.4 miles east of Switzer Campground along Arroyo Seco, c. 0.3 km south of Angeles Crest Hwy. 1021 Comment
  RSA0106720  Ambrosia acanthicarpa Duncan S. Bell 2011-9-30 2933 San Bernardino The northeast section of the Arica Mountains; the northwest section of Rice Valley; collecting at the ghost town of Rice. 284 Comment
  RSA0113790  Ambrosia acanthicarpa LeRoy Gross, Sarah J. De Groot 2016-8-31 7653 Ventura Strathmore Property. South of Montalvo, west of the 101 freeway, and east of Victoria Ave. 15 Comment
  RSA0114714  Ambrosia acanthicarpa R. G. Swinney 2011-10-25 15889 Los Angeles San Gabriel Mountains; south end of Coldbrook Campground, along Coldbrook Cr., from 50 m south to 100 m north of Hwy 39. 1006 Comment
  RSA0116760  Ambrosia acanthicarpa R. G. Swinney 2010-10-5 13966 Los Angeles San Gabriel Mountains; Placerita Cyn., Placerita Canyon Natural Area, 50-300 meters west of Nature Center. 463 Comment
  RSA0119060  Ambrosia acanthicarpa Lowell Ahart 2013-9-11 19026 Plumas On the west side of the paved road, about 1/2 mile west of Antelope Creek, about 16 miles (air) northeast of Taylorsville. 1585 Comment
  RSA126675  Ambrosia acanthicarpa Peter H. Raven, Henry J. Thompson 1959-9-27 14508 Los Angeles Sepulveda Canyon. (Lat N. 34Y, Long. 118Y to 119Y W.) 244 Comment
  RSA12823  Ambrosia acanthicarpa E. R. Johnson 1934-12-5 6256 Orange Rancho Santa Ana, Santa Ana Canyon. 137 Comment
  RSA151132  Ambrosia acanthicarpa Peter H. Raven 1961-9-17 16678 San Bernardino Near Fontana Power Plant north of Rialto 457 Comment
  RSA184184  Ambrosia acanthicarpa I. L. Wiggins 1965-11-6 20351 Orange Near well #14, Kramer Oil Estates, near end of county road to Rancho Santa Ana. Comment
  RSA188422  Ambrosia acanthicarpa L. S. Rose 1966-12-11 66094 Riverside Palm Springs. 152 Comment
  RSA232937  Ambrosia acanthicarpa L. S. Rose 1968-7-17 68148 Mono Lee Vining. 2073 Comment
  RSA250072  Ambrosia acanthicarpa R. F. Thorne, Larry E. DeBuhr, et al. 1972-10-13 42440 San Bernardino due S of Lost Lake and near Blue Cut. 807 Comment
  RSA252462  Ambrosia acanthicarpa R. F. Thorne, C. W. Tilforth 1969-9-6 39266 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  RSA270866  Ambrosia acanthicarpa James Henrickson 1977-10-21 16283 b San Bernardino ca. 6 (air) miles E of Cima, in Butcher Knife Canyon on W side of New York Mountains. 1585 Comment
  RSA274076  Ambrosia acanthicarpa Richard L. Zembal 1978-7-16 020 Inyo Just north of Coco Hot Springs. 1098 Comment
  RSA289853  Ambrosia acanthicarpa B. A. Prigge 1980-9-16 4049 Riverside Indio. Coachella Valley Stormwater Channel. 0 Comment
  RSA30131  Ambrosia acanthicarpa J. Clemens 1910-9-1 s.n. Monterey Pacific Grove. Comment
  RSA31308  Ambrosia acanthicarpa Joseph A. Ewan 1932-10-22 s.n. Los Angeles Santa Catalina Island: Above Avalon. Comment
  RSA31398  Ambrosia acanthicarpa H. M. Pollard 1946-10-19 s.n. Ventura Near Wheeler's Hot Springs. Comment
  RSA314492  Ambrosia acanthicarpa R. F. Thorne, Kay Wright, R. K. Benjamin 1982-10-8 55355 Riverside Mouth of Whitewater Canyon near Whitewater Post Office in sandy wash between old and new highway bridges and along Whitewater River. 412 Comment
  RSA32428  Ambrosia acanthicarpa N. C. Cooper 1943-9-10 916 Riverside Banning. 610 Comment
  RSA3325  Ambrosia acanthicarpa C. B. Wolf 1931-10-14 2459 Riverside Cabazon, San Gorgonio Pass. 518 Comment
  RSA33313  Ambrosia acanthicarpa N. C. Cooper 1943-10-9 958 Riverside Hemet. 305 Comment
  RSA334357  Ambrosia acanthicarpa K. Thorne, John Shultz 1980-9-19 54767 San Bernardino Kinston Mountains. Area about Crystal Springs and above to theW on blue limestone mountains. 1128 Comment
  RSA340141  Ambrosia acanthicarpa R. F. Thorne, Walter Wisura 1979-8-24 53667 San Bernardino Holcomb Valley: Joshua -tree, pinyon-juniper woodland near junction of Johnston Grade and Rose Mine Road above Cactus Flat 1837 Comment
  RSA346941  Ambrosia acanthicarpa James D. Morefield 1985-8-11 3067 -d Mono 1.2 mi N 40 deg. E of Red Mtn in hills just N of the mouth of McAfee Creek; Fishlake Valley drainage. 1662 Comment
  RSA374291  Ambrosia acanthicarpa Mary DeDecker 1984-8-23 5695 Inyo White Mountains: Deep Springs Valley drainage; Payson Canyon. 2072 Comment
  RSA416894  Ambrosia acanthicarpa F. R. Fosberg 1931-7-11 7195 Los Angeles Ridge Route near Tumble Inn,, Western Sierra Madre Mts. 1100 Comment
  RSA416897  Ambrosia acanthicarpa Anstruther Davidson 1890-09 2009 Los Angeles Cienega, Los Angeles. Comment
  RSA416899  Ambrosia acanthicarpa Rothwell s.n. Kern Mohave Desert, beyond Red Rock. [Red Rock Canyon?] Comment
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Dec 24 2016
  RSA416900  Ambrosia acanthicarpa Freda Detmers 1933-8-26 17901 Inyo Keough Hot Springs. Comment
  RSA416903  Ambrosia acanthicarpa H. de Forest 1932-8-27 s.n. Riverside Beaumont-Banning Pass Comment
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Nov 2 2011
  RSA416904  Ambrosia acanthicarpa Wheeler 1933-11-11 2242 San Bernardino 3 miles n. Rialto near Lytle Creek. 442 Comment
  RSA416905  Ambrosia acanthicarpa L. C. Wheeler 1931-9-7 68 San Bernardino 1 mi. NE Camp Cajon. 1067 Comment
  RSA416909  Ambrosia acanthicarpa H. M. Pollard 1948-10-31 s.n. Ventura Ventura Oil Fields Comment
  RSA425023  Ambrosia acanthicarpa J. C. Roos 1965-9-26 s.n. Riverside Hemet Valley, San Jacimto Mtns. Comment
  RSA43903  Ambrosia acanthicarpa H. M. Pollard 1947-9-28 s.n. Ventura Near Weldons, Ojai Railroad. Comment
  RSA450869  Ambrosia acanthicarpa Karlin G. Marsh 1984-10-12 s.n. Orange Seal Beach: southeast of San Gabriel River mouth. Comment
  RSA4775  Ambrosia acanthicarpa James Snow 1932-1 s.n. Orange Bryant Ranch, near Long Beach. North West 1/4 Section 1, Township 5 S, Range 12 W, Station #1. Plant #3. Comment
  RSA481993  Ambrosia acanthicarpa Richard Noyes 1988-9-18 744 Los Angeles Behind San Antonio Dam 701 Comment
  RSA482385  Ambrosia acanthicarpa Richard Noyes 1987-10-11 456 San Bernardino San Gabriel Mountains: foothills E of San Antonio Dam along dirt service road following power pylons 716 Comment
  RSA500525  Ambrosia acanthicarpa T. P. Krantz 1988-8-12 s.n. San Bernardino Erwin Lake. San Bernardino Mts. NE/4 Section 21, Range 2 East, Township 2 North. 2073 Comment
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Jul 5 2010
  RSA518250  Ambrosia acanthicarpa A. C. Sanders 1987-12-4 7569 Los Angeles El Segundo Dunes, immediately W of Los Angeles International Airport & Pershing Dr. 30 Comment
  RSA518417  Ambrosia acanthicarpa George K. Helmkamp 1990-9-23 A- 3 Lassen 3 mi. E of Susanville, along State Road 36. 1341 Comment
  RSA518780  Ambrosia acanthicarpa O. F. Clarke 1970-10-10 s.n. San Bernardino About 4 miles east of Old Dale Rd. Intersection, and about 20 miles east of Twentynine Palms. Comment
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Jul 20 2010
  RSA522939  Ambrosia acanthicarpa Timothy S. Ross, Orlando Mistretta 1990-10-24 3307 Los Angeles San Gabriel Mountains: Upper reaches of Venedo Canyon (off the E side of the San Gabriel Reservoir) where crossed by the Upper Monroe Road. 880 Comment
  RSA544299  Ambrosia acanthicarpa Steve Boyd 1991-9-8 6427 Riverside Aguanga Valley, sandy wash of Temecula Creek, S of Hwy 79 at jtn with Hwy 371. 600 Comment
  RSA554339  Ambrosia acanthicarpa B. Pitzer, S. Bliss 1991-10-2 1827 San Bernardino Twentynine Palms Marine Corps Base, 'Sand Hill' Artillery Range, ca. 6.5 kilometers (air) SW of Surprise Spring and 9 kilometers (air) E of Landers. Tortoise Study Plot 2. 793 Comment
  RSA588803  Ambrosia acanthicarpa Darin L. Banks, Steve Boyd 1995-10-17 0756 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
  RSA594346  Ambrosia acanthicarpa Steve Boyd, Lauren Raz 1996-10-14 9031 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
  RSA594792  Ambrosia acanthicarpa Steve Boyd, Lauren Raz 1996-10-29 9103 Los Angeles Liebre Mountains region, Atmore Meadows area at the southeastern end of Liebre Mountain in a tributary drainage to the North Fork Fish Canyon. 1317 Comment
  RSA595915  Ambrosia acanthicarpa Darin L. Banks, Lauren Raz 1996-11-5 1174 Riverside NW Palomar Mountains; Agua Tibia Mountains; Pechanga Indian Reservation, E of San Gabriel Church; Along the main road in the Reservation, approximately 20 m E of its intersection with Pechanga Creek. 393 Comment
  RSA596205  Ambrosia acanthicarpa Lauren Raz, Steve Boyd 1996-10-23 016 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
  RSA603826  Ambrosia acanthicarpa Steve Boyd 1997-9-17 10040 Los Angeles Liebre Mountains Region: 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
  RSA604987  Ambrosia acanthicarpa Walter Wisura 1997-9-9 5102 San Bernardino Jurupa Hills: Mary Vagl Museum and Nature Center, Cypress St., Fontana. Comment
  RSA605571  Ambrosia acanthicarpa Steven A. Junak, C. Thomas Philbrick 1979-10-26 EA- 27 Ventura East Anacapa Island. Comment
  RSA607925  Ambrosia acanthicarpa L. C. Wheeler 1961-6-13 7878 Los Angeles Pacoima Canyon near Dutch Louie Camp 716 Comment
  RSA608583  Ambrosia acanthicarpa R. S. Woglum 1938-9-26 2159 San Bernardino South Coast: Colton. Comment
  RSA617185  Ambrosia acanthicarpa R. G. Swinney 1989-8-6 s.n. Los Angeles San Gabriel Mountains, in and near Glendora Wilderness Park, Big Dalton Canyon. Big Dalton debris basin, in a disturbed area. 365 Comment
  RSA625298  Ambrosia acanthicarpa Mary DeDecker 1984-8-23 5695 Inyo White Mountains: Deep Springs Valley drainage; Payson Canyon. 2072 Comment
  RSA625863  Ambrosia acanthicarpa Scott D. White 1998-4-19 6270 Los Angeles Irwindale, San Gabriel River Basin, Santa Fe Flood Control Basin on disturbed alluvial fan. 152 Comment
  RSA643327  Ambrosia acanthicarpa R. D. Goeden, D. W. Ricker 1983-9-21 s.n. San Bernardino Eastern Mojave Desert: Nipton Road, 3.5 miles W of Nipton 823 Comment
  RSA653533  Ambrosia acanthicarpa LeRoy Gross, Valerie Soza, Neil Gilbert 2000-10-18 293 Los Angeles Verdugo Mountains: Hostetter Mountainway. 701 Comment
  RSA657207  Ambrosia acanthicarpa Joseph M. Keefe 2001-1-19 30992 Los Angeles Big Tujunga Wash, 300 meters northwest of corner of Wescott Avenue and Grove Street, Sunland District, Los Angeles, 91040. 384 Comment
  RSA679723  Ambrosia acanthicarpa Richard L. Zembal 1978-7-16 s.n. Inyo Coso Hot Springs Area. Wash north of Coso Hot Springs Comment
  RSA680320  Ambrosia acanthicarpa Scott D. White, Jeff Lincer 2003-7-7 9617 Orange Former El Toro Marine Corps Air Stn. East of 'El Toro Marine Sch.' and Irvine Blvd.; site of former dump. 140 Comment
  RSA681132  Ambrosia acanthicarpa Michael Honer 2001-8-22 1446 Mono Benton Crossing Road; appx. 1mi. W of turnoff to Moran Spring / Chidago Cyn. 2180 Comment
  RSA682039  Ambrosia acanthicarpa Michael Honer 2001-7-23 1268 Mono S end of Adobe Valley. Intersection of Hwy 120 and 4WD Rd. headed W near S base of Black Lake. 1974 Comment
  RSA688773  Ambrosia acanthicarpa Michael Honer 2001-8-27 1530 Mono Glass Mountain Region: Roadside, Hwy 120, appx. 1 mi. W of Adobe Creek. Narrow constricted pink rhyolitic canyon as road drops down into Adobe Valley. 2053 Comment
  RSA688813  Ambrosia acanthicarpa Michael Honer 2001-9-29 1588 Mono Deadman Summit; along E side of Hwy 395, 100m SE of turnoff to FS Rd. 1S05. 2452 Comment
  RSA692220  Ambrosia acanthicarpa Scott D. White 2003-10-9 9826 Riverside Pine Cove area. Dutch Flat. 1753 Comment
  RSA696055  Ambrosia acanthicarpa Anonymous 1928-11-11 s.n. San Diego Warner's Hot Springs. Comment
  RSA699676  Ambrosia acanthicarpa Keith E. Hoffmaster 1934-1 s.n. Orange Near Santa Ana. Comment
  RSA701227  Ambrosia acanthicarpa Jon P. Rebman, Jeannie Gregory 2003-10-7 9576 San Diego Laguna Mountains: Lucky 5 Ranch; southern portion of new acquisition by California State Parks; east side of Sunrise Hwy (S-1) between Cuyamaca Lake and Mount Laguna. 1675 Comment
  RSA702045  Ambrosia acanthicarpa Scott D. White, Angelia Carey 2004-9-16 10752 Riverside San Jacinto Mountain foothills: San Jacinto Mountain foothills: Along Poppet Creek NE of San Jacinto River. Along open sandy dry wash and adjacent roadside. 561 Comment
  RSA708868  Ambrosia acanthicarpa L. M. Moe 2004-9-25 2642 Kern Tule Elk State Reserve 88 Comment
  RSA713509  Ambrosia acanthicarpa LeRoy Gross, John Gross 2005-10-4 2432 Inyo West of the town of Lone Pine. Off road 14S04, from Hogback Creek Road. This road ends just inside the mouth of Hogback Creek. 2042 Comment
  RSA719708  Ambrosia acanthicarpa Michael A. Vincent, K. Levings 2006-7-29 12920 Lassen Along Rt 395, 46.9 road miles SE of Johnstonville, 13.9 miles N of Sierra County line. Comment
  RSA719844  Ambrosia acanthicarpa R. G. Swinney 1994-11-12 3367 San Bernardino Cajon Canyon, Baldy Mesa Ridge south of Phelan, FS Road. 3N24 NW of Nuss Ranch. 1488 Comment
  RSA720570  Ambrosia acanthicarpa Naomi Fraga 2002-9-28 159 Kern The Owens Peak Eastern Watershed: Owens Peak Wilderness Area. Lower end of Grapevine Canyon. 915 Comment
  RSA725142  Ambrosia acanthicarpa Steve Boyd, Carol Boyd 2007-10-10 11779 San Bernardino City of Colton, remnant of Colton Dunes, vacant lot between Colton Municpal Golf Course and Arrowhead Regional Medical Center at end of 200 block of Eucalyptus Ave, between Valley Blvd to south and San Bernardino Ave. to north. 335 Comment
  RSA728890  Ambrosia acanthicarpa Naomi Fraga, Daniel Brock 2004-11-14 1349 Kern Owens Peak Eastern Watershed. Indian Wells Steak House and Brewery. Along state highway 14. 793 Comment
  RSA729042  Ambrosia acanthicarpa Naomi Fraga, Sarah J. De Groot 2003-10-20 999 Kern The Owens Peak Eastern Watershed. In the aquaduct road bettwen Five Fingers and Short Canyon. 1037 Comment
  RSA730383  Ambrosia acanthicarpa Naomi Fraga, Heidi Bigelow, Michael Denslow 2004-2-10 1009 Kern Owens Peak Eastern Watershed. Indian Wells Steak House and Brewery. Along state highway 14. 793 Comment
  RSA730493  Ambrosia acanthicarpa Naomi Fraga, Heidi Bigelow, Michael Denslow 2004-2-10 1016 Kern Owens Peak Eastern Watershed. Indian Wells Steak House and Brewery. Along state highway 14. 793 Comment
  RSA731731  Ambrosia acanthicarpa Larry Hendrickson 1997-9-15 954 San Diego San Felipe Vally Wildlife Area, Californica Deaprtment of Fish & Game.11.5 mi. south of intersection of State Hwy 79 and County Hwy S-2 NW corner of ruderal area near eastern flank of Volcan Mountain. 784 Comment
  RSA736129  Ambrosia acanthicarpa T. B. Salvato, Katie Kurtz 2006-10-15 1916 Orange South Coast: Irvine, San Diego Creek flood control channel, near Michelson Drive and Harvard Avenue. Coordinates +/-1000m 6 Comment
  RSA736529  Ambrosia acanthicarpa Scott D. White, Angelia Carey 2004-7-2 10575 Riverside San Jacinto Mountain foothills: Soboba Indian Reservation, Poppet Creek Canyon. 549 Comment
  RSA737036  Ambrosia acanthicarpa Justin M. Wood 2008-8-5 103 San Bernardino Cajon Wash, approx. 1/2 mile upstream and downstream of Institution Rd. 473 Comment
  RSA737123  Ambrosia acanthicarpa Justin M. Wood 2008-10-15 189 Riverside Temecula - Murrieta Creek, downstream of 1st street bridge. 293 Comment
  RSA739689  Ambrosia acanthicarpa John Dittes 2005-11-26 1298 Los Angeles Big Tujunga Cyn; ca. 2.7 air-miles SE of Mt. McKinley, ca. 3.8 air-miles W of Big Tujunga Reservoir, ca. 3.6 air-miles NE of Mt. Gleason Jr. High School; wash of Big Tujunga Creek near Delta Flat Picnic Area. 512 Comment
  RSA746549  Ambrosia acanthicarpa A. C. Sanders, T. B. Salvato, Mitch Provance 2009-5-28 37031 Los Angeles San Gabriel River channel between Ramona Blvd. and Lower Azusa Rd., southwestern lobe of Irwindale between Baldwin Park and El Monte, under SCE powerlines 92 Comment
  RSA747325  Ambrosia acanthicarpa K. M. Meyer, A. Townesmith 2007-9-20 228 Mono Inyo National Forest, White Mountain Ranger District, 0.4 mi. on road 4380, off Hwy. 395, along Rock Creek (ca. 25 mi. north of Bishop, CA) 2052 Comment
  RSA748876  Ambrosia acanthicarpa Justin M. Wood, Dustin Ray 2009-8-27 1281 San Bernardino Wildhorse Creek from Hwy 38 up canyon +/- 1.5 miles to unnamed canyon to NW. 1966 Comment
  RSA751904  Ambrosia acanthicarpa Justin M. Wood, J. D. England 2009-7-29 1232 San Bernardino Cienega Seca Creek, between Heart Bar Campground (Fish Creek Trail) and 7,000 ft. 2095 Comment
  RSA753892  Ambrosia acanthicarpa Orlando Mistretta 2009-8-13 4050 San Bernardino Sana Ana River Canyon. Seven Oaks Road; just W of Hamilton Creek, 0.55 mi. NE of Seven Oaks Resort. Sunny, N Facing seepy, springy area just N of Road. 1592 Comment
  RSA754341  Ambrosia acanthicarpa Pam De Vries 2009-9-22 7573 Kern San Emigdio Mts. Region: Bitter Creek National Wildlife Refuge, ca 2.75 air miles SE of the junction of Cerro Noroesta and Hwy 33. 1173 Comment
  RSA755996  Ambrosia acanthicarpa R. G. Swinney 2008-10-7 9463 Los Angeles Big John Flats, north of Ball Flats, south base of Big John Peak. 1622 Comment
  RSA760606  Ambrosia acanthicarpa R. G. Swinney 2008-12-2 9927 Los Angeles Azusa, mouth of San Gabriel Canyon 0.8 mi. north of Foothill Blvd. 195 Comment
  RSA764528  Ambrosia acanthicarpa Justin M. Wood, D. M. Ray 2010-9-10 2612 San Bernardino Roadside on Highway 38, near mile maker 21.08. 1780 Comment
  RSA770401  Ambrosia acanthicarpa Duncan S. Bell, Colleen Wheeler 2010-8-16 1796 San Bernardino San Bernardino National Forest: Balky Horse Canyon; on an old road just south (up canyon) of junction of Highway 38 and Broom Flat road. 2352 Comment
  RSA772062  Ambrosia acanthicarpa Orlando Mistretta, Duncan S. Bell, Jill Beckman, J. D. England, Katie Kane, Jamie Hall, Chris McDonald, Lucila Reccia 2010-4-12 4628 Riverside San Bernardino Mountains region: Whitewater Cyn. Along Whitewater River drainage and adjacent slopes below Whitewater Visitor Center (Whitewater Trout Farm). 609 Comment
  RSA772532  Ambrosia acanthicarpa Orlando Mistretta, Duncan S. Bell, Jill Beckman, J. D. England, Katie Kane, Jamie Hall, Chris McDonald, Lucila Reccia 2010-4-12 4482 Riverside Whitewater canyon. Along Whitewater River drainage and adjacent slopes below Whitewater Visitor center (Whitewater Trout Farm) in the vicinity of Bonnie Bell. Between N33.94217, W116.64118 and N33.94722 W116.64305. 487 Comment
  RSA778557  Ambrosia acanthicarpa David J. Keil, V. L. Holland 1988-9-9 21115 San Luis Obispo North of Cayucos. West of Highway 1 on Villa Creek Road at site of partially constructed abalone farm 20 Comment
  RSA778674  Ambrosia acanthicarpa Stephanie Rockwood, Christi Gabriel 2011-10-11 075 San Bernardino Highway 62 Ironage Road Pulloff. Around Dale Lake Sand Dunes Area, Sheep Hole Mountains Wilderness. 413 Comment
  RSA778752  Ambrosia acanthicarpa J. Andre 2010-11-10 15468 San Bernardino Little San Bernardino Mountains; along Pioneertown Road, 2.6 miles N of Yucca Valley, west side of road 1135 Comment
  RSA780372  Ambrosia acanthicarpa Stephanie Rockwood, Christi Gabriel 2011-10-25 158 San Bernardino Hondo Street. Off highway 247. Follow road about 1.5 miles to sandy wash. 1116 Comment
  RSA780403  Ambrosia acanthicarpa Stephanie Rockwood, Christi Gabriel 2011-10-25 158 San Bernardino Hondo Street. Off highway 247. Follow road about 1.5 miles to sandy wash. 1116 Comment
  RSA780559  Ambrosia acanthicarpa Stephanie Rockwood, Christi Gabriel 2011-9-28 075 San Bernardino Kingston Spring. Kingston range Wilderness. About 15 miles from Hwy 127 on D152 to D171 (Kingston Wash Route). 694 Comment
  RSA781884  Ambrosia acanthicarpa Duncan S. Bell 2011-10-22 3002 Riverside Arica Mountains: west side of the mountain range, approximately 2.6 air miles west of Priests Well, and approximately 6.8 air miles southwest of the ghost town of Rice. 437 Comment
  RSA786627  Ambrosia acanthicarpa Lois Goodman 1982-9-24 S.N. San Bernardino Ft. Irwin NTC, sewage pond vicinity Comment
  RSA792902  Ambrosia acanthicarpa Naomi Fraga, Hester Bell, Monica Carlsen, Kristen Hasenstab-Lehman, Thomas Stoughton 2012-9-13 4125 San Bernardino At the mouth of Rattlesnake Canyon. Bighorn Mountain Wilderness. 1159 Comment
  RSA797712  Ambrosia acanthicarpa J. Andre 2012-10-12 23527 Kern Sierra Nevada: along Hwy 178 at Cranbrake Creek, 5.8 mi east of Onyx, approx 15 mi east of Isabella Lake. 878 Comment
  RSA798181  Ambrosia acanthicarpa J. Andre 2011-9-9 20244 San Bernardino Mid Hills; Mojave National Preserve; along Cedar Canyon Road, 1.0 miles west of Rock Springs, 0.2 miles east of Quail Rock. 1472 Comment
  RSA798968  Ambrosia acanthicarpa Duncan S. Bell, Joella Adkins, Palm Chumchim, Jessica Orozco, Aaron Sedgwick 2012-9-28 4324 San Bernardino Bighorn Mountain area; collecting along Rattlesnake Canyon, approximately 0.75 air mile east of Viscera Spring. 1576 Comment
  RSA800641  Ambrosia acanthicarpa J. Andre, Glenn L. Clifton 2012-9-5 22926 San Bernardino Mid Hills; along Cedar Canyon Road, 4.6 miles northeast of junction with Cima Road. 1441 Comment
  RSA800865  Ambrosia acanthicarpa Thomas Stoughton, Amanda Fisher, J. Travis Columbus 2011-11-3 1478 San Bernardino Transition between the San Bernardino Mountains and Little San Bernardino Mountains, Flamingo Heights area, West of highway 247 on Hondo Street 1140 Comment
  RSA854  Ambrosia acanthicarpa J. T. Howell 1927-10-22 762 Orange Near Eastern Boundary, Rancho Santa Ana. 152 Comment
  SBBG104548  Ambrosia acanthicarpa F. L. Johnson, N. A. McCarty 1993-10-15 ROB- 732 Monterey Nacimiento River at Sherwood Forest; Camp Roberts Comment
  SBBG107479  Ambrosia acanthicarpa E. R. Chandler 1962-9-19 936 Santa Barbara Ballinger Cyn, ca. 0.5 mi from Hwy 399 853 Comment
  SBBG108679  Ambrosia acanthicarpa N. Meng 1965-10-3 177 Kern W side of Lake Isabella, S of Tillie Crk, E of hwy Comment
  SBBG111763  Ambrosia acanthicarpa E. Neese, E. Painter 1995-10-24 HL 2211 Monterey ca. 0.1 km NE of San Antonio River channel, ca. 2.5 km NNW of Quail Top, ca. 0.2 rd km SE of jct of Tule and Sam Jones Rds; Ft Hunter Liggett 250 Comment
  SBBG114863  Ambrosia acanthicarpa R. Burgess, P. Munro 2001-9-19 4984 Ventura disturbed area beside Ventura Blvd N of Ventura Freeway, El Rio 22 Comment
  SBBG115307  Ambrosia acanthicarpa R. Burgess, P. Munro 2000-9-15 4222 Ventura Ormond Beach, Salicornia marsh, ca. 0.5 mi from S terminus of Arcturus Ave; Oxnard 3 Comment
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Dec 9 2014
  SBBG115310  Ambrosia acanthicarpa R. Burgess, P. Munro 2000-10-31 4279 Ventura N end of Kuehner Rd, Hummingbird Ranch, S side of Santa Susana Mtns 426 Comment
  SBBG115311  Ambrosia acanthicarpa R. Burgess, P. Munro 1999-10-29 3634 Ventura St Hwy 33, mile marker 30.12, Sespe drainage 1005 Comment
  SBBG115329  Ambrosia acanthicarpa R. Burgess, P. Munro 2000-8-24 4148 Ventura vacant field at SW corner of Anchors Way and Navigator Drive; Ventura 4 Comment
  SBBG115330  Ambrosia acanthicarpa R. Burgess, P. Munro 1996-8-25 2135 Ventura Lockwood Valley, W of Mutau Rd at Lockwood Valley Rd, mile marker 7.5 1249 Comment
  SBBG121074  Ambrosia acanthicarpa R. Burgess, P. Munro 2001-9-19 4984 Ventura Ventura Rd, N of Ventura Freeway, El Rio; Oxnard 22 Comment
  SBBG121859  Ambrosia acanthicarpa E. Neese, E. Painter 1994-9-13 HL 885 Monterey San Antonio River, ca. 2.2 km NW of Quail Top, ca. 0.2 rd km SE of jct of Tule and Sam Jones Rds; Ft Hunter Liggett 250 Comment
  SBBG124340  Ambrosia acanthicarpa R. Burgess, P. Munro 2003-5-4 5751 Ventura Santa Clara River floodplain, E of Fillmore, opposite S terminus of Powell Rd 121 Comment
  SBBG15079  Ambrosia acanthicarpa H. M. Pollard 1961-9-28 Ventura Santa Paula Comment
  SBBG17355  Ambrosia acanthicarpa H. M. Pollard 1959-10-9 Santa Barbara Southern Pacific Railroad E of and near Summerland Comment
  SBBG20868  Ambrosia acanthicarpa E. C. Twisselmann 1963-11-10 9089 Kern Twisselmann Rd, ca. 0.5 mi W of Hwy 33, Devils Den region 91 Comment
  SBBG25510  Ambrosia acanthicarpa D. Myrick 1966-10-8 1582 Santa Barbara Sisquoc River wash at Tepusquet Cyn Rd crossing 121 Comment
  SBBG32343  Ambrosia acanthicarpa L. S. Rose 1966-12-11 66094 Riverside Palm Springs 152 Comment
  SBBG33984  Ambrosia acanthicarpa L. S. Rose 1968-7-17 68148 Mono Lee Vining 2072 Comment
  SBBG40570  Ambrosia acanthicarpa H. M. Pollard 1962-10-19 Ventura Southern Pacific Railroad, oil fields (near Ortonville) Comment
  SBBG51942  Ambrosia acanthicarpa C. Davidson 1975-8-30 3244 San Bernardino 7.8 mi S and W of Onyx summit on St Hwy 38, College Camp rd branching S of Hwy 38, above Wildhorse Crk 1981 Comment
  SBBG52569  Ambrosia acanthicarpa R. Zembal 1977-6-4 Ventura between antennas and the N shore of the West Lagoon; Pacific Missile Test Center Comment
  SBBG55330  Ambrosia acanthicarpa R. Moran 1981-10-31 29862 Unknown river crossing E of Guadalupe (Francisco Zarco) 340 Comment
  SBBG61225  Ambrosia acanthicarpa R. Hoffmann 1931-8-27 Inyo Independence, near Owens River Comment
  SBBG61226  Ambrosia acanthicarpa R. Hoffmann 1927-10-14 Santa Barbara Cuyama Valley Comment
  SBBG61227  Ambrosia acanthicarpa R. Hoffmann 1927-10-14 Santa Barbara Santa Maria River Comment
  SBBG61230  Ambrosia acanthicarpa R. Hoffmann 1928-9-11 Ventura near Camulos Comment
  SBBG61231  Ambrosia acanthicarpa R. Hoffmann 1928-9-11 Los Angeles Acton Comment
  SBBG61232  Ambrosia acanthicarpa M. N. Ackley -Oct-1927 246 Los Angeles Eagle Rock 213 Comment
  SBBG61233  Ambrosia acanthicarpa H. M. Pollard 1945-11-22 Ventura Maricopa Rd (St Hwy 33), near Wheelers Comment
  SBBG7531  Ambrosia acanthicarpa H. and M. Dearing 1941-10-5 4764 Inyo near Big Pine Comment
  SBBG7532  Ambrosia acanthicarpa H. and M. Dearing 1939-12-31 4049 Riverside ca. 5 mi N of Palm Springs Comment
  SBBG7534  Ambrosia acanthicarpa H. and M. Dearing 1937-10-15 2535 Los Angeles Mint Cyn Rd near Palmdale Comment
  SBBG7535  Ambrosia acanthicarpa H. M. Pollard 1951-11-23 Santa Barbara Sandyland marsh; Carpinteria Comment
  SBBG88106  Ambrosia acanthicarpa C. F. Smith 1957-10-10 5636 Santa Barbara ca. 2 mi S of Orcutt Comment
  SBBG88107  Ambrosia acanthicarpa C. F. Smith 1952-7-10 3603 Santa Barbara Smith Cyn, on rd to Miranda Pine Mtn Comment
  SBBG88108  Ambrosia acanthicarpa H. M. Pollard -Aug-1957 Santa Barbara Sycamore Cyn; Santa Barbara Comment
  SBBG88449  Ambrosia acanthicarpa H. M. Pollard 1951-11-23 Santa Barbara railroad near Summerland Comment
  SBBG88862  Ambrosia acanthicarpa C. F. Smith 1948-8-4 2236 Santa Barbara Summerland, W of Carpinteria Comment
  SD108881  Ambrosia acanthicarpa James Henrickson 1978-10-19 17639 Inyo 12 miles south of Olancha, ca. 15 miles north of Dunmovin on Sierra alluvial fan near railroad crossing west of Hwy 395. Comment
  SD108975  Ambrosia acanthicarpa James Henrickson 1972-11-2 8089 Los Angeles 4 miles north of Newhall in Mayo Hospital site at McBean Parkway near Orchard Village Road. 370 Comment
  SD113181 Image available Ambrosia acanthicarpa Darley F. Howe 1938-10-2 763 San Diego Barrett Comment
  SD118642  Ambrosia acanthicarpa Duffie Clemons, Bob Theriault, Joan Stewart 1985-9-14 1206 San Diego alongside road, Tubb Canyon quad 1495 Comment
  SD12045  Ambrosia acanthicarpa Frank F. Gander 1935-7-10 232 San Diego Foot of Nate Harrison Grade. Comment
  SD120686  Ambrosia acanthicarpa Duffie Clemons, Erik Jonsson 1986-9-24 1549 San Diego S-2 road shoulder west of Vallecito Stage Station County Park. 440 Comment
  SD12165  Ambrosia acanthicarpa Frank F. Gander 1935-9-20 245 16 San Diego Bear Valley, near Escondido. Comment
  SD12324  Ambrosia acanthicarpa Frank F. Gander 1935-10-24 268 13 San Diego 2 miles northwest of Oak Grove. Comment
  SD12377  Ambrosia acanthicarpa Frank F. Gander 1935-10-31 276 10 San Diego One mile west of Jacumba. Comment
  SD124208  Ambrosia acanthicarpa Barry A. Prigge 1980-9-16 4049 Riverside Coachella Valley stormwater channel: west of Munroe St., Indio. Comment
  SD129576  Ambrosia acanthicarpa A. C. Sanders 1987-12-4 7569 Los Angeles El Segundo Dunes, immediately west of L. A. International Airport and Pershing Dr. Comment
  SD137916  Ambrosia acanthicarpa Darin L. Banks, Steve Boyd 1995-10-17 756 Riverside Northwest Palomar Mountains; Agua Tibia Mountains; Cleveland National Forest, Agua Tibia Wilderness Area; along lower Arroyo Seco. 515 Comment
  SD153480  Ambrosia acanthicarpa Jeannie Gregory, John Gregory 2003-9-14 527 San Diego Sunrise Highway, 1 mile below Crouch Valley 1372 Comment
  SD154424  Ambrosia acanthicarpa Jeannie Gregory, John Gregory 2003-9-21 568 San Diego Kitchen Creek Truck Trail, south of Sunrise Highway, Laguna Mountains. 1678 Comment
  SD155320  Ambrosia acanthicarpa Jon P. Rebman, Mike Mayer 2001-10-3 7505 San Diego Mission Valley Preserve: along the San Diego River from Sefton Park to the Interstate 5 bridge 20 Comment
  SD156478  Ambrosia acanthicarpa Jon P. Rebman, Jeannie Gregory 2003-10-7 9576 San Diego Laguna Mountains: Lucky 5 Ranch; southern portion of new acquisition by California State Parks: east side of Sunrise Hwy (S-1) between Cuyamaca Lake and Mount Laguna 1675 Comment
  SD161855  Ambrosia acanthicarpa Jerilyn Hirshberg 2004-8-31 852 San Diego adjacent to north side of Hwy 78/79, opposite Inaja picnic area, about 1 mile southeast of Santa Isabel 1000 Comment
  SD162468  Ambrosia acanthicarpa Robert Lauri, Matt Guilliams 2003-1-20 394 San Diego Cleveland National Forest. Just south of the Palomar Mountain State Park boundary along S-6. Approximately 2.4 miles north of Highway 76. 1045 Comment
  SD169410  Ambrosia acanthicarpa Jared Aldern, Larry Hendrickson 2004-10-22 3 San Diego Anza-Borrego Desert State Park, San Felipe Valley, just north of road and east of HWY 78 bridge over San Felipe Creek, E part of Scissor's Crossing. Roadside embankment. 687 Comment
  SD170929  Ambrosia acanthicarpa Joe Barth 2005-6-24 565 San Diego Chula Vista Wildlife Reserve in southeast San Diego Bay: sandy area south of west basin. (CVWR is accessed via electrical power plant and is a human made site constructed as mitigation for the adjacent J St. marina construction). 0 Comment
  SD175974  Ambrosia acanthicarpa Joe Barth 2005-10-11 616 San Diego Pine Valley: Ol' Hwy 80 at Deodar Tr. just west of county park. 1146 Comment
  SD175975  Ambrosia acanthicarpa Joe Barth 2005-10-13 636 San Diego Jacumba Valley, on the shoulders of Old Highway 80 between the town of Jacumba and Jacumba Airstrip, approx 1.5 miles SSE of Round Mtn, and 0.3 mile N of the international border. 854 Comment
  SD175976  Ambrosia acanthicarpa Joe Barth, Jill Leach 2005-10-16 690 San Diego Cleveland National Forest. About 3 miles SE of Pine Valley. Spring on the E side of Buckman Springs Rd (Hwy S1) at mile marker 9. About 1.7 miles N of Buckman Springs exit off I-8 freeway, and about 2.2 miles SSE of intersection of Sunrise Hwy (S1) & I-8. 1085 Comment
  SD177374  Ambrosia acanthicarpa Char Glacy, Nancy Nenow, Kerry Knudson 2005-10-4 130 San Diego Warner Springs, Cleveland National Forest. Lost Valley Rd. off Hwy 79 I(c) mile from Indian Flats Campground on Indian Flats Rd. N of Pine Mountain. 1217 Comment
  SD177960  Ambrosia acanthicarpa Jon P. Rebman, J. Gregory and M. Mulligan 2006-10-5 12952 San Diego Lake Henshaw (Vista Irrigation District property): approx. 2.5 miles N of the Lake; along Henshaw Truck Trail where it crosses the riparian area that drains into the lakel 835 Comment
  SD180497  Ambrosia acanthicarpa Nancy Nenow, Judy Gibson 2005-9-9 255 San Diego Warner Springs. South side of Hwy 79, I(c) mi W of where Agua Caliente Creek crosses Hwy 79, Ao mile E of airport runway. 897 Comment
  SD180498  Ambrosia acanthicarpa Larry Hendrickson 2005-11-12 1238 San Diego Anza-Borrego Desert State Park. SE side of Granite Mountain, 3.83 air miles SE of peak at wash on the north side of County Hwy S-2 that drains south into Box Canyon. 808 Comment
  SD183882  Ambrosia acanthicarpa Barbara Booth 2006-9-24 34 San Diego Oak Grove. 25249 Oak Grove Truck Trail, ca. 1 mile S of its intersection with Highway 79, at east edge of mowed field between Oak Grove Truck Trail and Temecula Creek. 915 Comment
  SD186592  Ambrosia acanthicarpa Jon P. Rebman, M. Mulligan & W. Schmidtmann 2008-6-19 15578 San Diego Camp Pendleton Marine Corps Base: along North River Road, just east of Stuart Mesa Road; along the Santa Margarita River in the southwestern portion of the base 3 Comment
  SD187332  Ambrosia acanthicarpa Scott D. White, Angelia Carey 2004-9-16 10752 Riverside San Jacinto Mountain foothills: Along Poppet Creek northeast of San Jacinto River. 561 Comment
  SD187605  Ambrosia acanthicarpa Larry Hendrickson 1997-9-15 954 San Diego San Felipe Valley Wildlife Area, California Department of Fish & Game. 11.5 miles south of intersection of State Hwy 79 and County Hwy S-2. West of S-2 NW corner of ruderal area near eastern flank of Volcan Mountain. 783 Comment
  SD187606  Ambrosia acanthicarpa Larry Hendrickson 2006-10-12 1903 San Diego Banner, 3 mi W of Scissors Crossing, Banner Creek in private campground (Banner Recreation Ranch), 0.2 air mi. NE of intersect of State hwy. 78 and Chariot Canyon Road. 815 Comment
  SD18909  Ambrosia acanthicarpa Frank F. Gander 1937-9-23 4504 San Diego Warner Springs Comment
  SD19260  Ambrosia acanthicarpa Frank F. Gander 1937-9-28 4545 San Diego Simmons Ranch, Oak Grove. Comment
  SD196202  Ambrosia acanthicarpa Mike Logan, Sharan Logan 2007-9-2 1005 San Diego Oak Grove, along Hwy 79 approximately 0.9 mi N W of Oak Grove Ranger Station at bridge where Hwy 79 crosses Chihuahua Creek 793 Comment
  SD19738  Ambrosia acanthicarpa Frank F. Gander 1937-10-27 4669 San Diego Peak southwest of Boulder Park. Comment
  SD198944  Ambrosia acanthicarpa Larry Hendrickson 2007-9-24 2502 San Diego Anza-Borrego Desert State Park, Earthquake Valley, in road shoulder of San Diego Co. hwy. S-2, 5.0 miles southeast of intersection with State hwy 78 (Scissors Crossing) 737 Comment
  SD198945  Ambrosia acanthicarpa Larry Hendrickson 2007-10-4 2511 San Diego Anza-Borrego Desert State Park, Earthquake Valley, East of Granite Mountain in road shoulder of San Diego Co. hwy. S-2, 4.8 miles SE of intersection with State hwy 78 (Scissors Crossing) 730 Comment
  SD200676  Ambrosia acanthicarpa Margaret R. Mulligan 2008-6-16 2605 San Diego Camp Pendleton Marine Corps Base, Santa Margarita floodplain, ca. I(c) mi SW of O'Neill Lake, ca. I(c) mi N of the intersection of Vandegrift Road and Rattlesnake Canyon Road. 28 Comment
  SD203212  Ambrosia acanthicarpa Larry Hendrickson 2007-12-4 2597 San Diego Chariot Canyon, Bureau of Land Management. Chariot Canyon Road, 4.0 surface miles south of intersection with State hwy. 78 (Banner) and 1.0 air mile WNW of Chariot Mountain summit. 1088 Comment
  SD205155  Ambrosia acanthicarpa Jerilyn Hirshberg 2008-8-23 1947 San Diego Cleveland National Forest, NW of Cuyamaca Mtns, about 6 miles south of intersection of Hwy 78 and 79 (Santa Ysabel), and about I(c) mile west of Kessler Flat 879 Comment
  SD207533  Ambrosia acanthicarpa Melvin M. Sweet 2008-10-11 713 San Diego Anza-Borrego Desert State Park, Coyote Canyon, Middle Willows, I(c) mi S of Riverside County Line at the end of the Coyote Canyon jeep road, about 14 mi NW from the town of Borrego Springs. 547 Comment
  SD208657  Ambrosia acanthicarpa Larry Hendrickson 2008-9-18 3280 A San Diego Cuyamaca Rancho State Park. Paso Picacho Campground, in maintenance yard south of campground entrance on SW-side of State hwy. 79, near Lookout Fire Road gate, 0.4 air mile WSW of Stonewall Peak. 1488 Comment
  SD208658  Ambrosia acanthicarpa Larry Hendrickson 2008-10-14 3306 San Diego Anza-Borrego Desert State Park. Sentenac Canyon on S-side of Grapevine Mountain. In steep drainage above cement spillway on N-side of State hwy. 78, 1.2 mile NE of northern intersection of 78 and County Road S-2, and 0.5 air mile SW of Sentenac Mountain 701 Comment
  SD210653  Ambrosia acanthicarpa Larry Hendrickson 2010-9-20 5160 San Diego Cuyamaca Mountains, Cuyamaca Rancho State Park. Sweetwater River in lower Green Valley, near State hwy. 79 bridge. 1.2 miles SSW of intersection of 79 and access road to Visitor Center and County Outdoor School. 1214 Comment
  SD214102  Ambrosia acanthicarpa Nancy Nenow, Barbara Nolan 2009-7-19 690 San Diego Warner Springs Ranch, about Ao mi N of Camino San Ignacio and Camino Moro, on road near water tank east of Ranch buildings. 1000 Comment
  SD219279  Ambrosia acanthicarpa Jon P. Rebman, W. Schmidtmann, G. Kenney, and others 2012-1-4 22359 San Diego Camp Pendleton: Training Area Hotel, along the Santa Margarita River; northwest of Fallbrook 60 Comment
  SD219698  Ambrosia acanthicarpa Larry Hendrickson 2009-9-27 4287 San Diego Banner Canyon, State hwy. 78 (Banner Grade), at spring on cutbank above highway. 1.5 air miles ENE of Julian, and 1.4 surface miles SE of intersection of 78 and Wynola Road. 1070 Comment
  SD219699  Ambrosia acanthicarpa Larry Hendrickson 2009-10-9 4303 San Diego San Felipe Valley near historic San Felipe. San Felipe Valley Road (S-2), 2.0 miles S of intersection with Montezuma Valley Road (S-22), and 0.1 mile S of intersection of S-2 and access road to Santa Ysabel Indian Reservation. 1059 Comment
  SD219700  Ambrosia acanthicarpa Larry Hendrickson, Fredrick Campbell 2009-9-29 4292 San Diego San Felipe Valley Wildlife Area, California Department of Fish & Game property. 3.8 air miles W of SW intersection of State hwy. 78 and County Road S-2 (Scissors Crossing), and 1.4 miles NW of access gate at hwy. 78. 790 Comment
  SD219701  Ambrosia acanthicarpa Larry Hendrickson 2009-10-9 4324 San Diego Valle de San Jose (Portilla), E of Lake Henshaw, at intersection of County Road S-2 and Montezuma Valley Road (S-22). 1029 Comment
  SD220152  Ambrosia acanthicarpa Nancy Nenow 2010-8-28 1442 San Diego Cleveland National Forest; Puerta La Cruz Road; 2 miles SE Mitchell Camp Road and Chihuahua Valley Road; 5.7 miles N of Warner Springs and Hwy 79 1168 Comment
  SD220153  Ambrosia acanthicarpa Nancy Nenow 2010-8-28 1411 San Diego Warner Springs, I(c) mile N of airport along Lost Valley Road about a quarter of a mile north of highway 79. 928 Comment
  SD221851  Ambrosia acanthicarpa Nancy Nenow, Char Glacy 2009-8-18 840 San Diego Warner Springs Ranch, A| mi SE intersection Hwy 79 and Camino San Ignacio, south of Los Tules and east of Camino San Ignacio on dirt road ending at a capped well 1100 Comment
  SD224821  Ambrosia acanthicarpa G. K. Helmkamp 1997-9-30 2498 Inyo East side of White Mountains 1707 Comment
  SD22647  Ambrosia acanthicarpa Frank F. Gander 1938-8-31 6436 San Diego Laguna Junction. Comment
  SD22650  Ambrosia acanthicarpa Frank F. Gander 1935-9-2 6439 San Diego Pine Valley Comment
  SD22982  Ambrosia acanthicarpa Frank F. Gander 1938-10-5 6625 San Diego Near Boulder Oaks Comment
  SD230411 Image available Ambrosia acanthicarpa Jon P. Rebman, W. Schmidtmann and G. Kenney 2012-11-6 25305 San Diego Camp Pendleton: Training Area Hotel; in the extreme eastern part of the Base; northwest of Fallbrook and just north of De Luz Road; along the Santa Margarita River just north of the De Luz Road bridge 85 Comment
  SD230412  Ambrosia acanthicarpa Jon P. Rebman, Victoria Marshall & Tom Barckley 2012-6-26 25055 San Diego Cleveland National Forest: vicinity of Buckman Springs, NE of Morena Reservoir; just south of Morena Stokes Valley/Corral Canyon Rd. and west of Buckman Springs Road 935 Comment
  SD23044  Ambrosia acanthicarpa Frank F. Gander 1938-10-5 6687 San Diego Cottonwood Comment
  SD23181  Ambrosia acanthicarpa Frank F. Gander 1938-10-20 6818 San Diego Near Santa Ysabel. Comment
  SD234274  Ambrosia acanthicarpa T. B. Salvato, K. Kurtz 2006-10-15 1916 Orange South Coast: Irvine, San Diego Creek flood control channel, near Michelson Drive and Harvard Avenue. 6 Comment
  SD240549  Ambrosia acanthicarpa Jon P. Rebman, W. Schmidtmann & G. Kenney 2014-5-8 28317 San Diego Camp Pendleton: Training Area India: eastern portion of Base; along the Santa Margarita River just southwest of the De Luz Road crossing 35 Comment
  SD244309  Ambrosia acanthicarpa Jon P. Rebman, M. Rood, J. & S. Rebman-Rood, I. Happle 2013-10-5 27098 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 854 Comment
  SD246728  Ambrosia acanthicarpa Larry Hendrickson 2011-9-16 5588 San Diego Cuyamaca-Laguna Mountains. Beside County Road S-1 (Sunrise Highway), at an access gate to Anza-Borrego Desert State Park opposite entrance to Lucky 5 Ranch. 3.9 air miles SSE of intersection of S-1 and State Highway 79. 1524 Comment
  SD247035  Ambrosia acanthicarpa Bill Sullivan 2009-10-21 763 San Diego Anza-Borrego Desert State Park, Coyote Canyon Jeep Road, 0.2 mi. south of Third Crossing, 8 miles N of Borrego Springs 345 Comment
  SD247773  Ambrosia acanthicarpa Nancy Nenow, Lawrence Glacy 2011-10-30 2063 San Diego Warner Springs Ranch; 0.6 mile E of Highway 79, east of swimming pools near a large water storage tank. 1004 Comment
  SD250890  Ambrosia acanthicarpa Larry Hendrickson, Keng-Lou James Hung 2013-9-12 6202 San Diego Anza-Borrego Desert State Park. East of Culp Valley. 1.6 miles SE of intersection of County Road S-22 (Montezuma Valley Road/Grade) and access road to Culp Valley Primitive Camping Area. 857 Comment
  SD250891  Ambrosia acanthicarpa Ian Cain, Emily Clayton 2009-9-25 1268 San Diego Cleveland National Forest; W side of Kitchen Creek Road at Cameron Fire Station just north of I-8; 0.25 miles NE of junction with I-8 1004 Comment
  SD250892  Ambrosia acanthicarpa John LaGrange, Grant Fletcher, Tom Oberbauer, Fred Sproul 2013-9-24 1266 San Diego Hot Springs Mountain; Eagles Nest Ranch spring area; near 0.44 mile NE of house and lake 1474 Comment
  SD251171  Ambrosia acanthicarpa Duncan S. Bell 2013-8-28 5736 San Bernardino Mojave Desert; East Mojave Desert region: Castle Mountains; at Hightower Well collecting around pond beside old caral, ca. 4.0 air miles southwest of Hart Peak. 1349 Comment
  SD252961  Ambrosia acanthicarpa CRES Native Seed Gene Bank, M. Kaminsky, L. Anderson 2011-11-14 766 San Diego Ranchita; E side of San Felipe Hills; Grapevine Canyon Road; 2.4 mi SE of junction with Montezuma Valley Road; W of Old Wilson Road 1149 Comment
  SD253363  Ambrosia acanthicarpa R. G. Swinney 2011-10-27 15925 Los Angeles San Gabriel Mountains: West Fork San Gabriel River, ca. 300 m east of entrancce gate to Cogswell Damm, between FS Rd 2N25 and the stream. 648 Comment
  SD254794  Ambrosia acanthicarpa Susan T Welker 1993-9-21 San Diego Agua Caliente Creek, Lake Henshaw area, Vista Irrigation District property. West of Swan Lake, east of San Luis Rey River. 850 Comment
  SD258010  Ambrosia acanthicarpa Larry Hendrickson 2014-10-20 6535 San Diego Palomar Mountain State Park. Boucher Hill, SE of paved parking area, between historic fire lookout tower and CalFire/CA State Parks communications tower, above Boucher Hill Loop Road, 0.7 mile WNW of intersection of loop road and Nate Harrison Grade. 1661 Comment
  SD25857  Ambrosia acanthicarpa Frank F. Gander 1939-9-26 7775 San Diego Near Lakeside. Comment
  SD25864  Ambrosia acanthicarpa Frank F. Gander 1939-9-28 7782 San Diego Rincon Comment
  SD28209  Ambrosia acanthicarpa Frank F. Gander 1940-9-25 8841 San Diego Santa Margarita River ford; road, Fallbrook to DeLuz. Comment
  SD30762  Ambrosia acanthicarpa Edith A. Purer 1935-11-17 6837 San Diego Warner's Hot Springs. Comment
  SD5660  Ambrosia acanthicarpa F. Youngberg 1934-8-17 San Diego Laguna Junction. Comment
  SD71347  Ambrosia acanthicarpa Henry M. Pollard 1965-10-13 Ventura Ventura River flood-plain east of Taylor Ranch pastures. Comment
  SD81235  Ambrosia acanthicarpa Darley F. Howe 1971-8-27 Tulare Kennedy Meadows. 1890 Comment
  SD83791  Ambrosia acanthicarpa Helen V. Witham 1972-10-3 1610 San Diego Sweetwater Viewpoint on I-8. 950 Comment
  SD85882  Ambrosia acanthicarpa R. Mitchel Beauchamp, Dudley Preston 1971-7-23 2890 San Diego Cottonwood Valley. 1260 Comment
  SD8860  Ambrosia acanthicarpa Daniel Cleveland Oct 1886 San Bernardino Victor Comment
  SDSU16203  Ambrosia acanthicarpa Jon Rebman, Mike Mayer 2001-10-3 7505 San Diego Mission Valley Preserve: along the San Diego River from Sefton Park to the Interstate 5 bridge 20 Comment
  SDSU6279  Ambrosia acanthicarpa R. M. Beauchamp 1966-12-28 92 San Bernardino On top of east bank of Cucamonga Wash north of Foothill Blvd. Comment
  SDSU6857  Ambrosia acanthicarpa F. Young Berg 1934-8-17 1631 San Diego Laguan Jch. Comment
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Nov 7 2016
  SDSU6858  Ambrosia acanthicarpa R. Havin 1962-7-6 3 San Diego In San Diego River channel at west end of Motel Circle. Comment
  SEINET10725714  Ambrosia acanthicarpa Karen M. Meyer, Andrew Townesmith 2007-9-20 Meyer 228 Mono Inyo National Forest, White Mountain Ranger District, 0.4 mi. on road 4380, off Hwy. 395, along Rock Creek (ca. 25 mi. north of Bishop, CA). 2052 Comment
  SEINET1076094 Image available Ambrosia acanthicarpa G. Helmkamp 1986-4-7 763 Riverside Canyon just E of and parallel to Highway 62; BLM land N of Indian Ave. 579 Comment
  SEINET156174  Ambrosia acanthicarpa Norman C. Cooper 1943-9-10 916 Riverside Banning. 610 Comment
  SEINET1908500  Ambrosia acanthicarpa G. K. Helmkamp, E. A. Helmkamp 2008-1 13888 Alpine Eastern Sierra Nevada Mountains: Carson River road, 0.4 mile east of its west junction with CA-88. 1713 Comment
  SEINET2043617 Image available Ambrosia acanthicarpa H. S. Gentry 1954-7-26 14252 Riverside Dripping Springs, along Rt. 79 Comment
  SEINET2049192 Image available Ambrosia acanthicarpa A. C. Sanders, Mark A. Elvin 2003-10-5 27226 San Bernardino University of California, Southern Mojave Desert: UC Burns Pinyon Ridge Reserve, big wash at Yucca Valley town limit off (above) Pioneertown Rd. and mouth of large canyon from NE (Yucca Valley North 7.5) 1098 Comment
  SEINET2073811  Ambrosia acanthicarpa S. Rhodes 2000-9-14 148 Riverside Desert Center, Dillon Road exit off I-10, sandy, disturbed area in Larrea tridentata desert. 274 Comment
  SEINET269277 Image available Ambrosia acanthicarpa G. R. Ballmer 1994-10-12 San Bernardino San Bernardino Valley: San Timoteo Creek about 100 m above its confluence with the Santa Ana River below Waterman Avenu Comment
  SEINET269550 Image available Ambrosia acanthicarpa Scott D. White 1996-9-22 4532 Riverside Lakeview Mountains: north of Homeland along Juniper Flats Road about 1.2 road miles north of intersection with State h 472 Comment
  SEINET270119 Image available Ambrosia acanthicarpa G. Helmkamp 1993-9-22 34 -10 San Bernardino 6.7 miles up Burns Canyon from the junction of Pioneer Town and Pipes Canyon roads 1524 Comment
  SEINET3871758  Ambrosia acanthicarpa Richard R. Halse 2010-8-26 8089 Lassen Along State Hwy. 70 at Beckwourth Pass ca 4.3 miles west of its junction with U.S. Hwy. 395 or 1.6 miles E of Sierra Valley.; 0 1584 Comment
  SEINET4560415  Ambrosia acanthicarpa Thomas Stoughton, Amanda Fisher and J. T. Columbus 2011-1 1478 San Bernardino Transverse Ranges; San Bernardino Mountains region: Transition between the San Bernardino Mountains and Little San Bernardino Mountains; Flamingo Heights area; West of highway 247 on Hondo Street. 1140 Comment
  SEINET4560557  Ambrosia acanthicarpa R. G. Swinney 2009-1 11611 Los Angeles Transverse Range; San Gabriel Mountains/Mojave Desert: Confuence of Kentucky Spring Canyon and Soledad Canyon, 2.6 mi. SW of Vincent train station 920 Comment
  SEINET5538667  Ambrosia acanthicarpa H. S. Gentry 1954-1 14252 Riverside Dripping Springs, along Route 79. Comment
  SEINET5586214  Ambrosia acanthicarpa George K. Helmkamp, Elizabeth Helmkamp 2013-1 22169 Alpine Northern Sierra Nevada Mountains: along CA-89, 0.6 mile south of Markleeville. 1691 Comment
  SEINET8044309 Image available Ambrosia acanthicarpa Larry Hendrickson 2006-1 1903 San Diego Banner; 3 mi W of Scissors Crossing, Banner Creek in private campground (Banner Recreation Ranch), 0.2 air miles NE of intersect of state hwy. 78 and Chariot Canyon Rd. 816 Comment
  SFV17215  Ambrosia acanthicarpa J. W. Dole 1980-11-1 s. n. Riverside Snow Creek road, 1 mile from junction of Highway 111 and Interstate Highway 10. 360 Comment
  SFV21086  Ambrosia acanthicarpa L. Gross, V. Soza, N. Gilbert 2000-10-18 293 Los Angeles Verdugo Mountains Hostetter Mountainway, along roadside near above coordinates. 701 Comment
  SFV21144  Ambrosia acanthicarpa J. M. Keefe 2001-1-19 30992 Los Angeles San Fernando Valley Big Tujunga Wash, 300 m northwest of corner of Westcott Avenue and Grove Street in Sunland. 384 Comment
  SFV3919  Ambrosia acanthicarpa H. M. Pollard 1959-10-9 s. n. Santa Barbara Southern Pacific Railroad east of and near Summerland. Comment
  SFV3920  Ambrosia acanthicarpa H. M. Pollard 1961-9-28 s. n. Ventura Santa Paula. Roadside. Comment
  SFV7049  Ambrosia acanthicarpa T. Gordon, K. A. Wilson, M. H. Grayum, L. R. Ballou, J. Berger 1974-9-13 665 Inyo Sierra Nevada Along Whitney Portal Road at junction with Horseshoe Meadow Road in very arid situation. 1372 Comment
  SJSU13939  Ambrosia acanthicarpa N. A. Hopkins 1986-8-28 1378 Lassen by County Road 33 (Scott Road), lower Long Valley, N of Highway 70 & E of Beckwourth Pass Comment
  UC1118420  Ambrosia acanthicarpa A. Simontacchi 1938-10-7 662 Monterey 4.9 mi sw Sweetwater School; King City Quad. 106 Comment
  UC1118421  Ambrosia acanthicarpa G. A. Graham 1937-9-18 284 Mono 4 mi ese Sonoma; Bridgeport Quad., Mono National Forest 1706 Comment
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Feb 26 2014
  UC1118423  Ambrosia acanthicarpa C. W. Hanks 1934-9-25 86 Lassen floor of, (near Plumas National Forest) Long Valley; Sierraville Quad., Plumas National Forest 1371 Comment
  UC1118424  Ambrosia acanthicarpa R. St. John 1931-10-6 256 Kern Kennedy Meadow; Kernville Quad. Comment
  UC1192130  Ambrosia acanthicarpa Malcolm A. Nobs and S. Galen Smith 1949-6-24 866 San Luis Obispo 1 mi w, (at Atascadero Laek) Atascadero; Atascadero Lake Comment
  UC1192149  Ambrosia acanthicarpa Malcolm A. Nobs and S. Galen Smith 1948-9-6 568 San Diego 2 mi e of, near Imperial-San Diego Co. line Jacumba 762 Comment
  UC149250  Ambrosia acanthicarpa L. R. Abrams 1903-9-27 4088 Monterey Neponset; Salinas River Comment
  UC1518845  Ambrosia acanthicarpa Robert F. Thorne, Kay L. Wright and Richard K. Benjamin 1982-10-8 55355 Riverside near, in wash between new and old hwy bridges and along Whitewater River Whitewater Post Office; San Bernardino Mts., Whitewater River, Whitewater Canyon 411 Comment
  UC1523918  Ambrosia acanthicarpa James D. Morefield 1985-8-11 3067 (f) Mono 1.2 mi N 40 deg E, (sandy saddle on n side of McAfee Cr near its mouth) Red Mountain; White Mountains, Fish Lake Valley 1661 Comment
  UC1548563  Ambrosia acanthicarpa H. C. Forbes and J. R. Haller 1983-10-21 FS 126 Inyo 4.5 mi n, 1 mi n on Fish Slough Road from jct with Jean Blanc Rd. Bishop; Owens Valley (n end) Comment
  UC160248  Ambrosia acanthicarpa J. B. Hickman 1911-9-18 Monterey Metz Comment
  UC166730  Ambrosia acanthicarpa S. B. Parish 1907-10-7 6496 San Bernardino San Bernardino Valley 300 Comment
  UC1922043  Ambrosia acanthicarpa Naomi Fraga, Heidi Bigelow, Michael Denslow 2004-2-10 1016 Kern Sierra Nevada; Southern Sierra Nevada region; Owens Peak eastern watershed. Indian Wells Steak House and Brewery. Along state highway 14. 793 Comment
  UC1922618  Ambrosia acanthicarpa Naomi Fraga, Heidi Bigelow, Michael Denslow 2004-2-10 1009 Kern Sierra Nevada; Southern Sierra Nevada region: the Owens Peak Eastern Watershed. Indian Wells Steak House and Brewery. Along state highway 14. Comment
  UC1923000  Ambrosia acanthicarpa Naomi Fraga, Daniel Brock 2004-11-14 1349 Kern Sierra Nevada; Southern Sierra Nevada region: the Owens Peak Eastern Watershed. Indian Wells Steak House and Brewery. Along state highway 14. Comment
  UC1928430  Ambrosia acanthicarpa Naomi Fraga, Sarah J. De Groot 2003-10-20 999 Kern Sierra Nevada; Southern Sierra Nevada region; Owens Peak Eastern Watershed. In the aquaduct road between Five Fingers and Short Canyon. 1037 Comment
  UC1928624  Ambrosia acanthicarpa Steve Boyd 2007-10-10 11779 San Bernardino Coastal Plains & Basins; San Bernardino Basin region; City of Colton, remnant of Colton Dunes, vacant lot between Colton Municipal Golf Course and Arrowhead Regional Medical Center at end of 200 block of Eucalyptus Ave, between Valley Blvd to south and San Bernardino Ave. to north. 335 Comment
  UC1929936  Ambrosia acanthicarpa Scott D. White 2003-10-9 9826 Riverside San Jacinto Mountains: Pine Cove area. Dutch Flat. San Jacinto Peak 7.5' Quad. Comment
  UC1979346  Ambrosia acanthicarpa David Keil with V. L. Holland 1988-9-9 21115 San Luis Obispo North of Cayucos. West of Highway 1 on Villa Creek Road at site of partially constructed abalone farm. Comment
  UC202346  Ambrosia acanthicarpa H. M. Hall 1917-10-30 10608 Inyo (Fish Hatchery) Oak Creek; Owens Valley Comment
  UC202357  Ambrosia acanthicarpa H. M. Hall 1917-10-27 10579 Los Angeles Lancaster Antelope Valley Comment
  UC2027032  Ambrosia acanthicarpa Greg Wilvert 2005-10-5 530 San Luis Obispo Southeast Half of the Caliente Range. 2.0km E of Lawson Spring along Padrones Canyon Road Comment
  UC2044822  Ambrosia acanthicarpa Nick Jensen with Neal Kramer 2014-9-7 2498 Kern Tejon Ranch. Along Lower Tejon Creek in Upper Globe Pasture. Comment
  UC2045129  Ambrosia acanthicarpa Nick Jensen 2014-8-27 2430 Kern Tejon Ranch. Along Contour Road, lower end of Canyon de los Gatos Montes. Comment
  UC2047211  Ambrosia acanthicarpa A. C. Sanders with Sandra L. Leatherman, Jeff Crain 2015-5-18 41712 Riverside Temescal Valley near Glen Ivy, along Temescal Canyon Road at Campbell Ranch Road intersection. Lake Mathews 7.5' Quad. Comment
  UC463498  Ambrosia acanthicarpa Ira L. Wiggins 1929-10-6 4207 Kern 1 mi s Bakersfield Comment
  UC468988  Ambrosia acanthicarpa Geo. B. Grant 1904-7-1 B 38 Los Angeles Pasadena Comment
  UC472289  Ambrosia acanthicarpa unknown 1905-9-25 243 Riverside Terraces Ranch Comment
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Oct 20 2007
  UC495847  Ambrosia acanthicarpa Mark Kerr 1932-9-21 41 Inyo Independence Comment
  UC527697  Ambrosia acanthicarpa C. B. Wolf 1931-10-14 Riverside roadside at Cabazon; San Gorgonio Pass 518 Comment
  UC54168  Ambrosia acanthicarpa E. B. Babcock 1902-11-1 Los Angeles near Pomona Comment
  UC56960  Ambrosia acanthicarpa A. Davidson Los Angeles Los Angeles Comment
  UC570409  Ambrosia acanthicarpa Chas. M. Belshaw 1936-11-14 2738 Fresno 3 mi w, roadside Alcalde; Inner Coast Ranges, Waltham Creek 335 Comment
  UC583145  Ambrosia acanthicarpa Lewis S. Rose 1936-10-13 36741 Kern Tehachapi Pass 1219 Comment
  UC712134  Ambrosia acanthicarpa Charles B. Fiker 1946-9-2 3643 San Diego Oak Grove Camp; Palomar Mt. Comment
  UC71785  Ambrosia acanthicarpa Mrs. M. H. Manning 1904-1-1 393 Modoc near(?) Fort Bidwell Comment
  UC750627  Ambrosia acanthicarpa Lewis S. Rose 1946-12-24 46308 Riverside 5 mi e Cabazon 441 Comment
  UC761987  Ambrosia acanthicarpa R. F. Hoover 1938-10-23 3887 Madera Irrigosa Comment
  UC761997  Ambrosia acanthicarpa R. F. Hoover 1940-10-5 4666 Lassen Wendel Comment
  UC76430  Ambrosia acanthicarpa Miss M. Alice King 1892-11-1 San Bernardino Colton Comment
  UC88765  Ambrosia acanthicarpa A. B. Leckenby 1886-10-1 Kern Bakersfield Comment
  UC896700  Ambrosia acanthicarpa Lewis S. Rose 1935-12-21 35679 Riverside Cabazon; Colorado Desert 609 Comment
  UC912213  Ambrosia acanthicarpa Herbert L. Mason 1928-10-2 4973 Monterey 1 mi below, (at Salinas River) Salinas; Salinas River Comment
  UCD128708  Ambrosia acanthicarpa Morris Halperin; A. S. Crafts 1932-8-6 410 Inyo Rock Creek. 2438 Comment
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Mar 6 2019
  UCD128710  Ambrosia acanthicarpa G. K. Helmkamp; E. A. Helmkamp 2006-9-12 11396 Alpine Northern Sierra Nevada Mountains: west end of Caples Lake at a dam; alongside Hwy CA-88. 2335 Comment
  UCD128713  Ambrosia acanthicarpa E. M. Johnston 1915-7-1 21 J Merced Los Banos. Comment
  UCD128715  Ambrosia acanthicarpa Daryl Koutnik 1978-4-21 411 Los Angeles Glendale at east end of Glenoaks Avenue, near Scholl Canyon Park. 304 Comment
  UCD128719  Ambrosia acanthicarpa K. M. Meyer; A. Townesmith 2007-9-20 228 Mono Inyo National Forest, White Mountain Ranger District, 0.4 mi. on road 4380, off Hwy. 395, along Rock Creek (ca. 25 mi. north of Bishop, CA). 2052 Comment
  UCD128860  Ambrosia acanthicarpa Lewis S. Rose 1966-12-11 66094 Riverside Palm Springs. 152 Comment
  UCD128861  Ambrosia acanthicarpa Lewis S. Rose 1968-7-17 68148 Riverside Lee Vining. 2072 Comment
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Feb 1 2014
  UCD128862  Ambrosia acanthicarpa L. S. Rose 1935-12-21 s.n. Riverside Cabazon, Colorado Desert. 609 Comment
  UCD128865  Ambrosia acanthicarpa Gordon Pilone 1960-10-15 55 Kern Second east-west canyon north of Lebec on Ridge Route. Emigdio Mountain Range, Kern River Drainage Area. 1054 Comment
  UCD128866  Ambrosia acanthicarpa Henry M. Pollard 1957-9-27 s. n. Santa Barbara Southern Pacific R.R. Summerland, Santa Barbara. Comment
  UCD128868  Ambrosia acanthicarpa Robert Tofsrud 1951-7-1 s.n. Inyo Deep Springs. Comment
  UCD128869  Ambrosia acanthicarpa Ernest C. Twisselmann 1963-11-10 9089 Kern Twisselmann Road, 0.5 mile west of Highway 33, Devils Den region. 91 Comment
  UCD128870  Ambrosia acanthicarpa Ernest C. Twisselmann 1958-10-1 4865 Kern Ridgecrest Road, 0.7 mile east of Inyokern. 741 Comment
  UCD128871  Ambrosia acanthicarpa Scott D. White 1997-11-5 6019 Los Angeles Malibu Coast; mouth of Trancas Canyon, north of Pacific Coast Hightway. 7 Comment
  UCD143900  Ambrosia acanthicarpa Richard R. Halse 2010-8-26 8089 Lassen along State Highway 70 at Beckwourth Pass around 4.3 miles west of its junction with US Highway 395 or 1.6 miles east of Sierra Valley. 1584 Comment
  UCD159541  Ambrosia acanthicarpa D. S. Park 2010-1-26 271 -1 Fresno Growing in field/ditch next to gas station (76). Coalinga, S. Lassen Ave. 148 Comment
  UCD159542  Ambrosia acanthicarpa D. S. Park 2010-1-26 271 -2 Fresno Growing in field/ditch next to gas station (76). Coalinga, S. Lassen Ave. 148 Comment
  UCD170033  Ambrosia acanthicarpa A. C. Sanders 1987-12-4 7569 Los Angeles El Segundo Dunes, immediately W of Los Angeles International Airport and Pershing Dr. (Near 33d 56'N, 118d 26'W). 30 Comment
  UCD73252  Ambrosia acanthicarpa Ayzik Solomeshch 2004-11-2 s. n. Merced Great Valley Grasslands State Park. 10 Comment
  UCD74493  Ambrosia acanthicarpa J. E. Sandoval 1995-10-30 100 Merced Great Valley Grasslands State Park (encompasses the former Fremont Ford State Recreation Area). South of the town of Stevinson, 1 mi. south of Hwy 140 on Hwy 165. 17 Comment
  UCD83189  Ambrosia acanthicarpa CNPS SSN-SJV Foothill Team 2008-6-9 127 Tulare Tulare County; Sequoia Riverlands Trust. Kaweah Oaks Preserve. 88 Comment
  UCR100211  Ambrosia acanthicarpa Scott D. White 1996-12-26 4640 Riverside Perris Basin, Perris area 442 Comment
  UCR101920  Ambrosia acanthicarpa Walter Wisura 1997-9-9 5102 San Bernardino San Bernardino Valley, Jurupa Hills, Mary Vagl Museum and Nature Center, Cypress St., Fontana. Comment
  UCR102611  Ambrosia acanthicarpa George K. Helmkamp, E. A. Helmkamp 1997-9-12 2415 Mono River Springs Lake, 3.1 mi. NE of Calif. hwy 120 on River Springs Rd. 1997 Comment
  UCR103561  Ambrosia acanthicarpa George K. Helmkamp, E. A. Helmkamp 1998-1-7 2558 Riverside San Jacinto Valley, 4.7 mi. SE of Florida Ave. (Hemet) on Bautista Rd. 701 Comment
  UCR10501  Ambrosia acanthicarpa O. F. Clarke 1970-10-10 s.n. San Bernardino Mojave Desert, c. 4 mi. east of Old Dale Road [=Gold Crown Rd. at Old Dale] on 29 Palms Hwy [= State Hwy 62], c. 20 mi. east of Twentynine Palms 518 Comment
  UCR106907  Ambrosia acanthicarpa D. L. Banks, L. Raz 1996-11-5 1174 Riverside Agua Tibia Mountains, Pechanga Indian Reservation, east of San Gabriel Church; along main road in the Reservation; c. 20 m east of its intersection with Pechanga Creek 393 Comment
  UCR108387  Ambrosia acanthicarpa L. C. Wheeler 1961-6-13 7878 Los Angeles San Gabriel Mtns., Pacoima Canyon near Dutch Louie Camp 716 Comment
  UCR109604  Ambrosia acanthicarpa R. D. Goeden, Don W. Ricker 1983-9-21 s.n. San Bernardino Eastern Mojave Desert, Nipton Road, 3.5 miles west of Nipton 823 Comment
  UCR111762  Ambrosia acanthicarpa Mitch Provance 1998-3-17 216 San Bernardino Jurupa Mountains, 'Pyrite Canyon', c. 100 yards south of the end of Savonia Dr. in Southridge, Fontana. Collected just north of the Riv. / S.B. county line. 335 Comment
  UCR113600  Ambrosia acanthicarpa A. C. Sanders, Mitch Provance, B. Pitzer 2000-9-27 23675 Riverside Santa Ana River Valley, SW side of Mt. Rubidoux, NW of intersection of Tequesquite Ave. and Gregory Rd., near confluence of Arroyo Tequesquite and the river 232 Comment
  UCR115128  Ambrosia acanthicarpa Mitch Provance 2000-10-28 2281 Riverside Jurupa Mountains, Jurupa Mountains Cultural Center, 1/4 mile SE of peak 1411 290 Comment
  UCR118556  Ambrosia acanthicarpa David Charlton 1989-10-7 4080 Ventura Tierra Rejada Valley, junction of Hwy 23 and Tierra Rejada Rd., SE of Moorpark and west of Simi Valley 198 Comment
  UCR121260  Ambrosia acanthicarpa R. G. Swinney 1989-11-24 1498 Los Angeles San Gabriel Mtns, Big Dalton Canyon area, in and near Glendora Wilderness Park. Big Dalton debris basin 366 Comment
  UCR128253  Ambrosia acanthicarpa A. C. Sanders, Kelly Volansky 2003-10-16 27343 Riverside Moreno Valley, lower Pigeon Pass Valley, NE corner of intersection of Old Lake Dr. and Pigeon Pass Rd. 534 Comment
  UCR128319  Ambrosia acanthicarpa A. C. Sanders, Mark A. Elvin 2003-10-5 27226 San Bernardino Southern Mojave Desert, UC Burns Pinyon Ridge Reserve, big wash at Yucca Valley town limit off (above) Pioneertown Rd. and in mouth of large canyon from NE 1098 Comment
  UCR141472  Ambrosia acanthicarpa Mike Misenhelter 2004-9-18 s.n. San Bernardino San Bernardino Valley, Ontario, San Antonio Winery, Hamner Ave. at Riverside Dr., near the Riverside Co. line 244 Comment
  UCR145115  Ambrosia acanthicarpa A. C. Sanders, P. J. MacKay, Tim Thomas 2004-10-17 28913 San Bernardino Southern Mojave Desert, Belfield Blvd. at southern tip of Spy Mtn., c.1 mile south of Giant Rock, NE of Landers 884 Comment
  UCR145438  Ambrosia acanthicarpa A. C. Sanders, P. J. MacKay, Tim Thomas 2004-10-17 28937 San Bernardino Southern Mojave Desert, Johnson Valley, wash below Ruby Canyon in the Bighorn Mtns., above Old Woman Springs Rd. 0.1 mi. west of Valley Vista Rd. 921 Comment
  UCR146497  Ambrosia acanthicarpa Scott D. White, Angelia Carey 2004-9-16 10752 Riverside San Jacinto Mountains foothills, Along Poppet Creek NE of San Jacinto River 610 Comment
  UCR153996  Ambrosia acanthicarpa Jon P. Rebman, M. Mayer 2001-10-3 7505 San Diego Mission Valley Preserve: along the San Diego River from Sefton Park to the Interstate 5 bridge. Square: R8 20 Comment
  UCR164531  Ambrosia acanthicarpa T. B. Salvato, Sandra Murcia 2005-11-1 1250 Los Angeles West Mojave Desert, NE edge of Palmdale c. 2 mi N of Pearland, 10 acre parcel east of 46th St., 0.1 mi past Hwy 138 on Palmdale Blvd, and south of Avenue Q 793 Comment
  UCR167407  Ambrosia acanthicarpa John F. Green 2005-6-11 s.n. San Bernardino Mojave Desert, Victor Valley, c. 9 mi. SE of Victorville, c. 2 mi north of Calif. Aqueduct and c. 2 mi east of US Highway 395 1010 Comment
  UCR167472  Ambrosia acanthicarpa John F. Green 2005-11-26 s.n. San Bernardino Mojave Desert, SW of 29 Palms Marine Corps Base, c. 3 mi SE of Yucca Valley, large wash at edge of parcel 1061 Comment
  UCR17124  Ambrosia acanthicarpa S. R. Szarek 1970-11-7 s.n. San Bernardino San Gabriel Mtns, Lytle Creek, across from Lytle Creek Ranger Station 823 Comment
  UCR17227  Ambrosia acanthicarpa L. F. LaPre 1979-10-8 s.n. San Bernardino Mojave Desert, Valley Mountain, c. 5 mi. NE of Twentynine Palms 503 Comment
  UCR172460  Ambrosia acanthicarpa Anuja Parikh, Nathan Gale 2005-7-11 2132 Los Angeles Santa Clara River Valley, Newhall Ranch, N of the Santa Clara River, near Del Valle and the mouth of Chiquito Canyon, study area 29 274 Comment
  UCR175758  Ambrosia acanthicarpa Mark A. Elvin 2005-9-24 4552 San Bernardino S Mojave Desert, Little San Bernardino Mtns: UC Burns Pinyon Ridge Reserve off Skyline Ranch Rd., c. 2 (air) mi ESE of Pioneertown and 1.5 (air) mi NW of Yucca Valley, Water Canyon Wash 1075 Comment
  UCR176692  Ambrosia acanthicarpa R. D. Goeden, Don W. Ricker 1969-7-31 s.n. Riverside Peninsular Range; San Jacinto Mtns., Lake Hemet, along Hwy 74 south of inlet 1326 Comment
  UCR176699  Ambrosia acanthicarpa R. D. Goeden 1966-10-27 s.n. Riverside Riverside, UCR Campus 366 Comment
  UCR176766  Ambrosia acanthicarpa G. S. Nuessly 1980-11-11 s.n. Riverside Riverside: U.C. Riverside campus, near Health Center 351 Comment
  UCR178040  Ambrosia acanthicarpa Scott D. White 2003-9-9 9826 Riverside San Jacinto Mtns, Pine Cove area, Dutch Flat 1753 Comment
  UCR178647  Ambrosia acanthicarpa George K. Helmkamp, E. A. Helmkamp 2006-9-12 11396 Alpine Northern Sierra Nevada Mountains, west end of Caples Lake at a dam; alongside CA Hwy 88 2335 Comment
  UCR179618  Ambrosia acanthicarpa R. G. Swinney 1991-10-6 1627 San Bernardino San Gabriel Mtns., San Bernardino National Forest. Cajon Canyon, near stream c. 0.5 mi south of the N end of Old Hwy 395 881 Comment
  UCR181012  Ambrosia acanthicarpa R. G. Swinney 1994-11-12 3367 San Bernardino San Gabriel Mtns., Cajon Canyon, Baldy Mesa Ridge south of Phelan, FS Rd. 3N24 NW of Nuss Ranch 1488 Comment
  UCR186134  Ambrosia acanthicarpa T. B. Salvato, Katie Kurtz 2006-10-15 1916 Orange South Coast, Irvine, San Diego Creek flood control channel, near Michelson Drive and Harvard Avenue 6 Comment
  UCR195796  Ambrosia acanthicarpa Jim Andre, T. La Doux 2007-9-6 8708 Riverside Little San Bernardino Mountains, Joshua Tree National Park, Queen Valley, just east of Geology Tour Road, in July 2006 burn area 1319 Comment
  UCR196581  Ambrosia acanthicarpa Naomi Fraga, Heidi Bigelow, Michael Denslow 2004-2-10 1016 Kern Southern Sierra Nevada Range, Owens Peak Eastern Watershed, Indian Wells Steak House and Brewery, along CA Hwy 14 793 Comment
  UCR196794  Ambrosia acanthicarpa George K. Helmkamp, E. A. Helmkamp 2008-7-22 13888 Alpine Eastern Sierra Nevada Mountains, Carson River road, 0.4 mile east of its west junction with CA-88 1713 Comment
  UCR199558  Ambrosia acanthicarpa Scott D. White, Angelia Carey 2004-7-2 10575 Riverside San Jacinto Mountain foothills, Soboba Indian Reservation, Poppet Creek Canyon 610 Comment
  UCR200094  Ambrosia acanthicarpa Naomi Fraga, Sarah J. De Groot 2003-10-20 999 Kern Southern Sierra Nevada Range, Owens Peak Eastern Watershed, aquaduct road between Five Fingers and Short Canyon 1037 Comment
  UCR200376  Ambrosia acanthicarpa Jim Andre 2007-12-6 9235 San Bernardino Mojave Desert, Kelso Dunes, along east side of Kelbaker Road, c. 3.5 mi south of Kelso 708 Comment
  UCR201859  Ambrosia acanthicarpa Justin M. Wood, Scott D. White 2008-8-5 103 San Bernardino San Bernardino Valley, Cajon Wash, c. 1/2 mi upstream and downstream of Institution Road 524 Comment
  UCR202681  Ambrosia acanthicarpa George K. Helmkamp, E. A. Helmkamp 2008-9-22 14149 Alpine Northern Sierra Nevada Mountains, Carson River Road running about parallel to CA-88, 2.2 miles east of its western junction with CA-88 1619 Comment
  UCR209635  Ambrosia acanthicarpa R. G. Swinney 2008-10-8 9536 Los Angeles San Gabriel Mtns., Table Mountain West, north of Big Pines 2291 Comment
  UCR210009  Ambrosia acanthicarpa R. G. Swinney 2008-10-7 9463 Los Angeles San Gabriel Mtns., Big John Flats, north of Ball Flats, south base of Big John Peak 1671 Comment
  UCR210088  Ambrosia acanthicarpa R. G. Swinney 2008-10-20 9645 Los Angeles San Gabriel Mountains, San Dimas Canyon at Puddingstone Diversion Dam 354 Comment
  UCR210173  Ambrosia acanthicarpa R. G. Swinney 2008-10-16 9620 Los Angeles San Gabriel Mtns., Big Pine Meadow 2061 Comment
  UCR210306  Ambrosia acanthicarpa R. G. Swinney 2008-10-16 9592 Los Angeles San Gabriel Mtns., Jackson Lake, south side of Big Pines Highway 1872 Comment
  UCR210308  Ambrosia acanthicarpa R. G. Swinney 2008-11-17 9840 San Bernardino San Gabriel Mtns., near Lost Lake in Lone Pine Canyon, hidden spring on south side of dirt road 902 Comment
  UCR210314  Ambrosia acanthicarpa A. C. Sanders, Fred M. Roberts, Jutta Burger 2009-10-21 37199 Orange Peninsular Range; Santa Ana Mtns., Lomas de Santiago, Bee Flat at mouth of Limestone Canyon 264 Comment
  UCR210320  Ambrosia acanthicarpa R. G. Swinney 2008-10-30 9746 San Bernardino San Gabriel Mtns., Wright Lake, Wrightwood 1841 Comment
  UCR210439  Ambrosia acanthicarpa R. G. Swinney 2008-12-11 9983 San Bernardino San Gabriel Mtns./Mojave Desert, Bob's Gap, NE of Valyermo and 3 miles S of Hwy 138 1280 Comment
  UCR210483  Ambrosia acanthicarpa R. G. Swinney 2008-12-2 9927 Los Angeles San Gabriel Mtns., Azusa, mouth of San Gabriel Canyon 0.8 mi. north of Foothill Blvd. 195 Comment
  UCR210506  Ambrosia acanthicarpa R. G. Swinney 2008-11-7 9778 San Bernardino San Bernardino Valley/ San Gabriel Mtns., Glen Helen Regional Park, marsh to the west of the fishing lakes 610 Comment
  UCR210643  Ambrosia acanthicarpa R. G. Swinney 2008-10-23 9701 San Bernardino San Gabriel Mtns., Clyde Ranch, Lone Pine Canyon 1500 Comment
  UCR210702  Ambrosia acanthicarpa R. G. Swinney 2008-11-10 9814 San Bernardino San Gabriel Mtns., Cajon Pass, 0.6 mi. SW of Swarthout Canyon Rd. junction with Cajon Road 805 Comment
  UCR213376  Ambrosia acanthicarpa Dan S. Cooper 2010-3-20 20100320- 07 A Los Angeles South Coast, Madrona Marsh, Torrance 24 Comment
  UCR213711  Ambrosia acanthicarpa Justin M. Wood, Dustin Ray 2009-8-27 1281 San Bernardino San Bernardino Mountains, Wildhorse Creek from Hwy 38 up canyon c. 1.5 miles to unnamed canyon to northwest 2349 Comment
  UCR214680  Ambrosia acanthicarpa A. C. Sanders 2007-10-26 34411 D San Bernardino San Bernardino Mountains Foothills/ San Bernardino Valley, NW Bernardino at NE edge of Calif. State University S.B., near debris basin between the mouths of Sycamore and Badger canyons 474 Comment
  UCR216562  Ambrosia acanthicarpa Dan S. Cooper 2010-6-13 610- 66 Los Angeles Western Transverse Range; eastern Santa Monica Mtns., Forest Lawn Drive west of Griffith Park 155 Comment
  UCR22008  Ambrosia acanthicarpa Steve Boyd 1980-9-8 346 Riverside Gavilan Hills, Harford Springs County Park, NW corner of the Gavilan plateau 610 Comment
  UCR220309  Ambrosia acanthicarpa Bill Wagner 2005-10-7 s.n. Riverside Peninsular Range; Gavilan Hills Region, Cajalco Flood Control Basin site (proposed, since constructed), at NE corner of El Sobrante Rd. and Cajalco Rd. 447 Comment
  UCR223937  Ambrosia acanthicarpa Ann Howald 2010-9-5 2656 Mono Eastern Sierra Nevada Mtns., Convict Creek, UC Sierra Nevada Aquatic Research Lab, Mt. Morrison Rd, 0.8 mi NW of intersection with Hwy 395 2155 Comment
  UCR224069  Ambrosia acanthicarpa Jim Andre 2010-9-29 14830 San Bernardino Eastern Mojave Desert, Cima Dome, Mojave National Preserve; along Morningstar Mine Rd 3 mi. NNE of Cima 1103.07 Comment
  UCR227262  Ambrosia acanthicarpa Orlando Mistretta 2009-8-13 4050 San Bernardino San Bernardino Mountains, Santa Ana River Canyon, near junction of Stetson Creek and Hwy 38 1914 Comment
  UCR228444  Ambrosia acanthicarpa Jim Andre 2010-10-4 15319 Inyo Owens Valley, along Hwy 190, 0.9 mi east northeast of Olancha 1102 Comment
  UCR228968  Ambrosia acanthicarpa Jim Andre 2010-9-17 15309 San Bernardino Mojave Desert, Cima Dome, Mojave National Preserve, along Cima Road c. 2 miles southwest of Cima 1189 Comment
  UCR230204  Ambrosia acanthicarpa A. C. Sanders 2011-4-6 38991 Riverside Peninsular Range; Santa Ana Mtns. Region, Temescal Canyon, along Temescal Canyon Rd. 1.5 mi. NE (73 deg. ) of Glen Ivy Hot Springs, 0-0.4 mi. NE of I-15 crossing 320 Comment
  UCR236327  Ambrosia acanthicarpa Jim Andre 2010-11-10 15468 San Bernardino Little San bernardino Mtns., along Pioneertown Road, 2.6 mi. N of Yucca Valley 1135 Comment
  UCR239599  Ambrosia acanthicarpa O. F. Clarke 2004-5-26 s.n. Riverside San Bernardino Valley Region, Riverside, Santa Ana River near the old Salt Lake Railroad bridge 215 Comment
  UCR239933  Ambrosia acanthicarpa O. F. Clarke 2004-5-29 s.n. Orange Santa Ana River Canyon, Santa Ana River on the west side of Featherly Park 110 Comment
  UCR239956  Ambrosia acanthicarpa R. G. Swinney 2009-11-16 11624 Los Angeles Transverse Range; San Gabriel Mountains/Mojave Desert, 20 m east (up canyon) from east edge of Kentucky Springs, tributary of Kentucky Springs Canyon, 3/4 mile W of Angeles Forest Hwy at Angeles National Forest boundary, 0.4 mi. west of junction of Mt. Emma Rd. and Angeles Forest Hwy 1122 Comment
  UCR239971  Ambrosia acanthicarpa R. G. Swinney 2009-11-18 11658 Los Angeles Transverse Range; San Gabriel Mountains, summit of Oracle Hill, 1 air mi. ESE of junction of Angeles Forest Hwy & Soledad Canyon 1310 Comment
  UCR240030  Ambrosia acanthicarpa R. G. Swinney 2009-11-13 11611 Los Angeles Transverse Range; San Gabriel Mountains/Mojave Desert, confluence of Kentucky Springs Canyon and Soledad Canyon, 2.6 mi. SW of Vincent train station 921 Comment
  UCR240146  Ambrosia acanthicarpa Ann Howald 2011-9-2 2816 Mono Eastern Sierra Nevada Mtns., Hwy 89, c. 0.2 mi east of gulch with white firs 2000 Comment
  UCR24354  Ambrosia acanthicarpa John C. Roos 1965-9-26 s.n. Riverside San Jacinto Mtns, Hemet Valley 518 Comment
  UCR244448  Ambrosia acanthicarpa Jim Andre 2011-10-26 19176 Inyo Eastern Sierra Nevada Mtns., Big Pine Canyon, along Glacier Lodge Road, lower part of canyon at base of major switchback 1552 Comment
  UCR247244  Ambrosia acanthicarpa George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22169 Alpine Northern Sierra Nevada Mountains, along CA-89, 0.6 mile south of Markleeville 1691 Comment
  UCR247984  Ambrosia acanthicarpa David J. Keil 1986-9-27 19741 -2 Los Angeles Along Hwy I-5, just south of Hungry Valley Road exit 915 Comment
  UCR254535  Ambrosia acanthicarpa Jon P. Rebman, Warren Schmidtmann, G. Kenney 2012-11-6 25305 San Diego Camp Pendleton, Training Area Hotel, in the extreme eastern part of the Base, northwest of Fallbrook and just north of De Luz Road, along the Santa Margarita River just north of the De Luz Road bridge. Square: C7 85 Comment
  UCR255216  Ambrosia acanthicarpa Jon P. Rebman, M. Rood, J. & S. Rebman-Rood, I Happle 2013-10-5 27098 San Diego Anza-Borrego Desert State Park; Oriflamme Canyon, southeast of Julian, west of Box Canyon & south of Granite Peak; riparian area off Mason Valley Truck Trail. Atlas Square: L22 855 Comment
  UCR255329  Ambrosia acanthicarpa Ian Cain, Emily Clayton 2009-9-25 1268 San Diego Peninsular Range, Cleveland National Forest, west side of Kitchen Creek Road at Cameron Fire Station just north of I-8; 0.25 mi. NE of junction with I-8. Atlas Square: S23 1004 Comment
  UCR257751  Ambrosia acanthicarpa George K. Helmkamp, Elizabeth Helmkamp 2012-8-24 19701 Alpine Northern Sierra Nevada Mountains, along CA-88, Carson Pass Hwy, at the west side of Carson Spur, 1.7 air mi west (278 deg. ) of Kirkwood 2436 Comment
  UCR257891  Ambrosia acanthicarpa George K. Helmkamp, Amy Barnes 2014-8-27 23054 Mono Northern Sierra Nevada Mountains, Monitor Pass along CA-89, 0.6 mile south of the junction with Big Springs Road 2360 Comment
  UCR257916  Ambrosia acanthicarpa George K. Helmkamp, Amy Barnes 2014-8-27 23062 Mono Northern Sierra Nevada Mountains, Monitor Pass along CA-89, 4.7 miles west of the junction with CA-395 2040 Comment
  UCR258535  Ambrosia acanthicarpa George K. Helmkamp, Amy Barnes 2014-8-27 23029 Alpine Northern Sierra Nevada Mountains, West Fork Carson River canyon, along highway CA-88/Carson Pass Hwy, 2.6 miles east of the junction with Hwy 89/Luther Pass Rd. 1994 Comment
  UCR258563  Ambrosia acanthicarpa R. G. Swinney 2010-5-29 13009 Los Angeles San Gabriel Mountains, May Canyon Truck Trail (FSRd. 3N54) crossing of W. Fork May Canyon, north side of rd., c. 1.3 air miles NNW of road's entrance at Veterans Memorial Park in Sylmar 939 Comment
  UCR258890  Ambrosia acanthicarpa R. G. Swinney 2010-8-16 13520 Los Angeles San Gabriel Mountains, Arcadia, Big Santa Anita Canyon, Arcadia Wilderness Park 280 Comment
  UCR258993  Ambrosia acanthicarpa George K. Helmkamp, Amy Barnes 2014-9-16 23076 Alpine Eastern Sierra Nevada Mountains, Paynesville, junction of Chambers Lane and Diamond Valley Road along West Fork Carson River 1593 Comment
  UCR259548  Ambrosia acanthicarpa R. G. Swinney 2010-10-15 14064 Los Angeles San Gabriel Mountains, from Little Tujunga Wash at the I-210 Fwy, to the east end of Hansen Lake 329 Comment
  UCR261707  Ambrosia acanthicarpa Dick Newell, Don Millar 2014-9-14 384 Orange Peninsular Range; Santa Ana Mtns. Foothills, Lomas de Santiago, Agua Chinon Wash, 0.1 mi. above the 241 Toll Rd./Foothill Transp. Corridor 202 Comment
  UCR262407  Ambrosia acanthicarpa S. J. Myers, Vesta A. Myers 2006-9-30 1011 San Bernardino San Bernardino Mtns./Mojave Desert, Arrastre Canyon near Juniper Flats, c. 2 miles SE of Rock Springs, east of Coxey Rd. 1241 Comment
  UCR265336  Ambrosia acanthicarpa Larry Hendrickson 1997-9-15 954 San Diego San Felipe Valley Wildlife Area, California Dept. of Fish & Game, c. 11.5 mi south of intersection of State Hwy 79 and County Hwy S-2. West of S-2 northwest corner of ruderal area near eastern flank of Volcan Mountain and just west of barbed wire fence that parallels. Square: I21 784 Comment
  UCR272518  Ambrosia acanthicarpa R. G. Swinney 2011-10-27 15925 Los Angeles San Gabriel Mountains, West Fork San Gabriel River, c. 300 meters east (downstream) of entrance gate to Cogswell Dam, between FS Rd 2N25 and the stream 649 Comment
  UCR273225  Ambrosia acanthicarpa R. G. Swinney 2011-10-18 15822 Los Angeles San Gabriel Mountains, 0.1-0.4 miles east of Switzer Campground [=Picnic Area] along Arroyo Seco, c. 0.3 km south of Angeles Crest Hwy 1037 Comment
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Aug 24 2017
  UCR273406  Ambrosia acanthicarpa R. G. Swinney 2011-10-25 15889 Los Angeles San Gabriel Mountains, south end of Coldbrook Campground, along Coldbrook Cr., from 50 m south to 100 m north of Hwy 39 1006 Comment
  UCR275353  Ambrosia acanthicarpa T. B. Salvato, Melissa Clemons 2005-6-9 1496 Riverside Peninsular Range, Gavilan Hills, E/W trending side canyon feeding into Walker Canyon, c. 0.3 mile northeast of Hwy 15 457 Comment
  UCR277185  Ambrosia acanthicarpa R. G. Swinney 2010-10-5 13966 Los Angeles San Gabriel Mountains, Placerita Cyn., Placerita Canyon Natural Area, 50-300 meters west of Nature Center 463 Comment
  UCR278590  Ambrosia acanthicarpa Onkar Singh 2014-9-20 5032 Inyo White Mountains, east side of Hwy 168 at bend near Gilbert Pass, c. 8 km northeast of Deep Springs 1900 Comment
  UCR279749  Ambrosia acanthicarpa Ann Howald 2016-8-18 3960 Mono East of Sierra Nevada, Northwest shoreline of Mono Lake, c. 0.2 mile southeast of intersection of Hwy 395 and Cemetery Road 1965 Comment
  UCR280465  Ambrosia acanthicarpa Onkar Singh 2015-10-25 5603 San Bernardino Mojave Desert, c. 13 km NW of Hinkley, just south of Harper Lake, north side of Lockhart Rd 2.5 km east of Harper Lake Rd 631 Comment
  UCR3416  Ambrosia acanthicarpa Heidi A. Haid 1964-5-19 64519- 1 Riverside east end of Blaine St. at Box Springs Mtn. 428 Comment
  UCR34357  Ambrosia acanthicarpa A. C. Sanders, N. M. Fellows 1983-10-12 4001 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
  UCR34910  Ambrosia acanthicarpa L. B. Ziegler 1967-7-27 194 Riverside San Jacinto Mtns., Hemet (Garner) Valley 1387 Comment
  UCR44066  Ambrosia acanthicarpa James D. Morefield 1985-8-11 3067 Mono Northern Mojave Desert, White Mtns., north side of McAfee Creek near its mouth 1662 Comment
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Apr 3 2014
  UCR48112  Ambrosia acanthicarpa Michael Theroux 1983-8-24 610 Kern Tehachapi Mountains, Cummings Valley, 1 mi north of Banducci Road, 0.5 - 1 mi west of Pellisier Road. along Chanac Creek 1159 Comment
  UCR51499  Ambrosia acanthicarpa A. C. Sanders 1987-12-4 7569 Los Angeles South Coast, El Segundo Dunes, immediately west of Los Angeles International Airport and Pershing Dr. 31 Comment
  UCR56122  Ambrosia acanthicarpa H. M. Pollard 1951-11-23 s.n. Santa Barbara Along RR near Summerland. Comment
  UCR58163  Ambrosia acanthicarpa George K. Helmkamp 1989-8-1 s.n. Mono Eastern Sierra Nevada Mountains, US Hwy 395, just south of the summit of Devil's Gate Pass 2256 Comment
  UCR67435  Ambrosia acanthicarpa George K. Helmkamp 1990-9-23 A- 3 Lassen Northern Sierra Nevada Mountains, 3 mi east of Susanville, along State Road 36 1345 Comment
  UCR70041  Ambrosia acanthicarpa B. G. Pitzer, S. Bliss 1991-10-2 1827 San Bernardino Mojave Desert, 29 Palms Marine Corps Base, 'Sand Hill' Artillery Range, c. 6.5 km airline SW of Surprise Spring, & 9 air km east of Landers. At Tortoise Study Plot 2 795 Comment
  UCR76396  Ambrosia acanthicarpa Scott D. White 1993-7-6 1616 San Bernardino San Bernardino Mtns. Cismontane Foothills, Downslope from mouth of Badger Canyon, c. 1 air mi. NE of Calif. State Univ., San Bernardino 550 Comment
  UCR77760  Ambrosia acanthicarpa Steve Boyd 1991-9-8 6427 Riverside Peninsular Range, Aguanga Valley, sandy wash of Temecula Creek, south of Hwy 79 at jct with Hwy 371 600 Comment
  UCR79290  Ambrosia acanthicarpa George K. Helmkamp 1993-9-22 34- 10 San Bernardino San Bernardino Mtns., 6.7 mi. up Burns Canyon from junction of Pioneertown and Pipes Canyon Roads 1529 Comment
  UCR92226  Ambrosia acanthicarpa D. L. Banks, Steve Boyd 1995-10-17 0756 Riverside NW Palomar Mtns, Cleveland National Forest, Agua Tibia Mtns, Agua Tibia Wilderness Area, south of Dripping Springs Campground 512 Comment
  UCR92765  Ambrosia acanthicarpa F. M. Reed 1933-10-14 8191 Riverside South Coast; San Bernardino Valley, Riverside, Terraces Ranch [547 Chicago Ave., near Arroyo Tequesquite] 245 Comment
  UCR92766  Ambrosia acanthicarpa F. M. Reed 1933-9-20 8087 Riverside San Jacinto Mtns, Garner Valley 1470 Comment
  UCR94938  Ambrosia acanthicarpa Scott D. White 1996-9-22 4532 Riverside Perris Basin, Lakeview Mtns: north of Homeland, along Juniper Flats Road, c. 1.2 road miles north of intersection with State Hwy 74, unnamed drainage channel parallel to the road 500 Comment
  UCSB10270  Ambrosia acanthicarpa Ballard 1954-10-30 Riverside 3 miles south of Men's Reform School, (Chino Institute), Chino 198 Comment
  UCSB14593  Ambrosia acanthicarpa Breedlove, Dennis 1961-8-5 Riverside Along State Highway 74, 5 miles east of Keen Camp, Hemet Valley, San Jacinto Mountains 1341 Comment
  UCSB27676  Ambrosia acanthicarpa Lavinger, S. 1975-10-6 Los Angeles On Los Angeles Crest Highway, 0.3 miles north of Angeles Crest Ranger Station; San Gabriel Mountains 762 Comment
  UCSB45946  Ambrosia acanthicarpa Roos, John 1965-9-26 Riverside Hemet Valley, San Jacinto Mtns. Comment
  UCSB48044  Ambrosia acanthicarpa Roberts, Fred 1981-9-26 Orange Anaheim Bay; Calif. Rte. 1 at southern margin of Naval Weapons Station, 1.7 km. SE McGaugh School; 1.1 km. W Hog Island 1 Comment
  UCSB51542  Ambrosia acanthicarpa Hodgson, John 1928-10-4 Los Angeles Cr. bottom at upper gato, Bailey Place, Peace Valley 975 Comment
  UCSB70508  Ambrosia acanthicarpa Forbes, Holly 1983-10-21 Inyo 1 mile N on Fish Slough Rd. from jct. with Jean Blanc Rd. at dirt rd. separating drainage of slough from canal of Owens River; Fish Slough; 4.5 mi. N of Bishop at northern end of Owens Valley; study site includes 14 sq. mi. along a 7 mi. drainage axis 1341 Comment
  UCSB7140  Ambrosia acanthicarpa Ballard 1954-10-30 Riverside 3 miles south of Men's Reform School, (Chino Institute), Chino 198 Comment
  UCSB7142  Ambrosia acanthicarpa Philbrick, Ralph 1954-10-24 Riverside 4 miles south of Chino Institute Comment
  UCSB7143  Ambrosia acanthicarpa Philbrick, Ralph 1954-9-30 Los Angeles San Antonio Canyon 426 Comment
  VVC1482  Ambrosia acanthicarpa R. D. Goeden 1983-9-21 s.n. San Bernardino Eastern Mojave Desert, Nipton Road, 3.5 miles W of Nipton 823 Comment
  VVC1542  Ambrosia acanthicarpa A. C. Sanders, PJ MacKay, Tim Thomas 2004-10-17 28937 San Bernardino Southern Mojave Desert, Johnson Valley, wash below Ruby Canyon in the Bighorn Mtns., above Old Woman Springs Rd. 0.1 mi. west of Valley Vista Rd. 921 Comment
  VVC1568  Ambrosia acanthicarpa A. C. Sanders, PJ MacKay, Tim Thomas 2004-10-17 28913 San Bernardino Southern Mojave Desert, Belfield Blvd. at southern tip of Spy Mtn., ca.1 mile south of Giant Rock, NE of Landers 884 Comment
  VVC2121  Ambrosia acanthicarpa Jim Andre 2003-4-15 4481 Inyo Owens Valley,, Manzanar Historic Site, NW corner 1186 Comment
  VVC630  Ambrosia acanthicarpa P. J. MacKay, A. C. Sanders 1996-10-20 57 San Bernardino San Bernardino Mtns, Crowder Cyn along PCT east of Tiffany's Restaurant at I-15 and Hwy 138 1006 Comment
  CAS-BOT-BC13537  Ambrosia acanthicarpa Beatrice F. Howitt 1963-12-17 S. 381 Alpine East side of Monitor Pass, about 2 miles from highway 395 near Coleville Comment
  CAS-BOT-BC13539  Ambrosia acanthicarpa J. H. Thomas 1958-12-29 7512 Madera Brenda [Berenda] Slough at State Highway 152. About 2.5 miles south of Chowchilla. 68 Comment
  CAS-BOT-BC13540  Ambrosia acanthicarpa John Thomas Howell 1973-10-31 50269 Madera Berenda Slough, 3 miles west of Califa 76 Comment
  CAS-BOT-BC13543  Ambrosia acanthicarpa R. E. Frenkel 1964-8-26 762 San Benito On Quien Sabe Road, 0.1 mile east of Tres Pinos 170 Comment
  CAS-BOT-BC13544  Ambrosia acanthicarpa Roxana S. Ferris; W. R. Ernst 1956-10-21 13074 San Benito San Benito River. Along Cienaga Road near junction with State Highway 25, 4.7 miles S of Cienaga School. Comment
  CAS-BOT-BC13546  Ambrosia acanthicarpa John Thomas Howell 1967-11-6 44189 Merced 1 mile south of Stevinson Comment
  CAS-BOT-BC13547  Ambrosia acanthicarpa Ernest C. Twisselmann 1957-11-7 4129 Kern Bitterwater Valley, western Kern County 419 Comment
  CAS-BOT-BC13548  Ambrosia acanthicarpa Ernest C. Twisselmann 1958-10-1 4865 Kern Ridgecrest Road, 0.7 mile east of Inyokern 741 Comment
  CAS-BOT-BC13549  Ambrosia acanthicarpa Ernest C. Twisselmann 1958-10-1 4865 Kern Ridgecrest Road, 0.7 mile east of Inyokern 741 Comment
  CAS-BOT-BC13552  Ambrosia acanthicarpa Loraine Meng 1965-10-10 188 Kern Country Road Yards, Inyokern 731 Comment
  CAS-BOT-BC13555  Ambrosia acanthicarpa Ernest C. Twisselmann 1957-11-7 4129 Kern Bitterwater Valley, western Kern County 419 Comment
  CAS-BOT-BC13559  Ambrosia acanthicarpa Lyman Benson 1932-10-16 4063 Kern East Bakersfield 182 Comment
  CAS-BOT-BC13562  Ambrosia acanthicarpa James R. Shevock 1979-10-1 6624 Kern Along Calif Hwy 178, Kern River Canyon, Sequoia National Forest 365 Comment
  CAS-BOT-BC13564  Ambrosia acanthicarpa Elmer I. Applegate 1981-11-8 6979 Kern Eric Station, Mojave-Tehachi Road, 12 miles NW of Mojave Comment
  CAS-BOT-BC13598  Ambrosia acanthicarpa J. B. Hickman 1919-10-1 s.n. Monterey Aromas Comment
  CAS-BOT-BC13599  Ambrosia acanthicarpa Beatrice F. Howitt 1963-9-30 1775 Monterey Salinas River on Davis Road, near the bridge, about 1/2 mile east of Reservation Road, west of Salinas. Comment
  CAS-BOT-BC13600  Ambrosia acanthicarpa Beatrice F. Howitt 1963-9-28 1750 Monterey Road up to Mt. Toro in front of Violini Ranch. 213 Comment
  CAS-BOT-BC13601  Ambrosia acanthicarpa Beatrice F. Howitt 1963-7-12 1669 Monterey River Road on west side of Salinas Valley before reaching Soledad Mission Comment
  CAS-BOT-BC13602  Ambrosia acanthicarpa J. T. Howell 1963-6-21 39471 Monterey San Lucas 121 Comment
  CAS-BOT-BC13603  Ambrosia acanthicarpa J. T. Howell 1930-10-26 5709 Monterey Salinas River at the Soledad Bridge. Comment
  CAS-BOT-BC13605  Ambrosia acanthicarpa J. W. Tilden 1946-8-26 s.n. Monterey King City Comment
  CAS-BOT-BC13630  Ambrosia acanthicarpa Clare B. Hardham 1956-10-7 1434 San Luis Obispo Oak flat Comment
  CAS-BOT-BC13631  Ambrosia acanthicarpa R. F. Hoover 1966-9-12 9981 San Luis Obispo Santa Maria River north of Santa Maria. Comment
  CAS-BOT-BC13632  Ambrosia acanthicarpa R. F. Hoover 1966-9-12 9982 San Luis Obispo Santa Maria River north of Santa Maria. Comment
  CAS-BOT-BC13634  Ambrosia acanthicarpa Ernest C. Twisselmann 1954-9-1 1536 San Luis Obispo Temblor Range, Bitterwater Road, 4 miles east of Choice Valley School 518 Comment
  CAS-BOT-BC13635  Ambrosia acanthicarpa Ernest C. Twisselmann 1954-9-1 1536 San Luis Obispo Temblor Range, Bitterwater Road, 4 miles east of Choice Valley School 518 Comment
  CAS-BOT-BC13636  Ambrosia acanthicarpa Ernest C. Twisselmann 1954-9-29 1606 San Luis Obispo Temblor Range, Palo Prieta Canyon, 6 miles south of Cholame 579 Comment
  CAS-BOT-BC13637  Ambrosia acanthicarpa Ernest C. Twisselmann 1954-9-29 1606 San Luis Obispo Temblor Range, Palo Prieta Canyon, 6 miles south of Cholame 579 Comment
  CAS-BOT-BC13638  Ambrosia acanthicarpa Javier Penalosa 1960-11-14 1000 San Luis Obispo Four (Kramers) Corners, the intersection of US 395 & 466 Comment
  CAS-BOT-BC13642  Ambrosia acanthicarpa Ernest C. Twisselmann 1955-9-15 2382 Santa Barbara San Emigdio Range, Ventacopa Highway at Santa Barbara Canyon 847 Comment
  CAS-BOT-BC13643  Ambrosia acanthicarpa Ernest C. Twisselmann 1955-9-15 2382 Santa Barbara San Emigdio Range, Ventacopa Highway at Santa barbara Canyon 847 Comment
  CAS-BOT-BC13647  Ambrosia acanthicarpa Ernest C. Twisselmann 1967-9-21 13942 Tulare Kern Plateau, Chimney Meadow. 1950 Comment
  CAS-BOT-BC13648  Ambrosia acanthicarpa Ernest C. Twisselmann 1969-8-1 15858 Tulare Kern Plateau, Big Pine Creek, 2,2 miles below Marques Spring 1920 Comment
  CAS-BOT-BC13655  Ambrosia acanthicarpa Ernest C. Twisselmann; Eben McMillan; John Nicoll 1968-8-13 14873 Tulare Kern Plateau, Troy Meadow Road on the slope above Bitter Creek 2194 Comment
  CAS-BOT-BC13656  Ambrosia acanthicarpa John Thomas Howell 1973-10-31 50277 Tulare Near Potvisha, Middle Fork of Kaweah River 609 Comment
  CAS-BOT-BC13657  Ambrosia acanthicarpa John Thomas Howell 1952-10-27 28890 Tulare Eleven Range View Point, Sequoia Park 1590 Comment
  CAS-BOT-BC13660  Ambrosia acanthicarpa John Thomas Howell; Gordon H. True 1967-9-18 43799 Tulare Kern Plateau, 1.3 miles from Long Valley on road to Lamont Meadow 1828 Comment
  CAS-BOT-BC13662  Ambrosia acanthicarpa John Thomas Howell; Gordon H. True 1967-8-9 43617 Tulare Kern Plateau, about 6 miles N of Chimney Meadow 2103 Comment
  CAS-BOT-BC42852  Ambrosia acanthicarpa Geo. B. Grant 1905-10-24 s.n. Los Angeles Cajon Pass Comment
Read comments
Oct 10 2020
  CAS-BOT-BC42853  Ambrosia acanthicarpa Robert F. Thorne; M. Z. Thorne 1966-8-29 36569 Los Angeles San Gabriel Mtns., Angeles N.F., near hwy along N Fork of San Gabriel River, 3 mi. S of Coldbrook Campground 670 Comment
  CAS-BOT-BC42855  Ambrosia acanthicarpa Cecil Hart 1922-9-12 5 Los Angeles Howard & Smith's nursery, Montebello Comment
  CAS-BOT-BC42856  Ambrosia acanthicarpa C. W. Tilforth 1969-10-17 236 Los Angeles N of Rancho Santa Ana Bot. Garden Comment
  CAS-BOT-BC42861  Ambrosia acanthicarpa Alice Eastwood 1906-5-27 337 Los Angeles Santa Nearia river bed Comment
  CAS-BOT-BC42862  Ambrosia acanthicarpa R. E. Frenkel 1964-8-30 808 Mono On California Hwy. 108 near Sonora Pass 2651 Comment
  CAS-BOT-BC42863  Ambrosia acanthicarpa R. E. Frenkel 1964-10-1 916 Lassen On California Hwy. 36, 1 mile east of California Hwy 44, west of Susanville 1493 Comment
  CAS-BOT-BC42865  Ambrosia acanthicarpa J. H. Thomas 1959-9-19 8167 Mono Lee Vining Comment
  CAS-BOT-BC42866  Ambrosia acanthicarpa J. H. Thomas 1961-9-14 9780 Mono Near the center of Lee Vining 2133 Comment
  CAS-BOT-BC42868  Ambrosia acanthicarpa J. W. Congdon 1898-8-17 s.n. Mono Mono Lake Comment
  CAS-BOT-BC42870  Ambrosia acanthicarpa Lewis S. Rose 1937-9-29 37702 Mono Mono Lake 2042 Comment
  CAS-BOT-BC42872  Ambrosia acanthicarpa J. Burch; J. Robins; T. Wainwright 1976-8-26 317 Mono Mono Lake and vicinity, north of Lee Vining 1950 Comment
  CAS-BOT-BC42877  Ambrosia acanthicarpa Ernest C. Twisselmann 1966-10-4 12808 Fresno Mouth of Los Gatos Canyon, western Fresno County 251 Comment
  CAS-BOT-BC42878  Ambrosia acanthicarpa Ernest C. Twisselmann 1966-10-4 12808 Fresno Mouth of Los Gatos Canyon, western Fresno County 251 Comment
  CAS-BOT-BC42879  Ambrosia acanthicarpa Ira L. Wiggins 1929-10-5 4180 Fresno 0.5 mi. N of Fresno Comment
  CAS-BOT-BC42880  Ambrosia acanthicarpa Ira L. Wiggins 1929-10-5 4180 Fresno 0.5 mi. N of Fresno Comment
  CAS-BOT-BC42881  Ambrosia acanthicarpa E. Robinson 1935-9-21 s.n. Fresno Palm and Weldon Ave. 914 Comment
  CAS-BOT-BC42882  Ambrosia acanthicarpa Walter S. Ball 1934-1-1 s.n. Fresno near Fresno Comment
  CAS-BOT-BC42883  Ambrosia acanthicarpa R. Doug Stone; G. DeNevers; Steve Castagnoli 1980-9-15 299 Inyo Front gate of Crystal Spring, Beck Canyon 1127 Comment
  CAS-BOT-BC42884  Ambrosia acanthicarpa Roxana S. Ferris 1927-10-23 6923 Inyo Deep Springs Ranch, Deep Springs Valley Comment
  CAS-BOT-BC42885  Ambrosia acanthicarpa Ira L. Wiggins 1971-10-23 21760 Inyo Margin of landing field, Bishop Airport, near town of Bishop Comment
  CAS-BOT-BC42889  Ambrosia acanthicarpa P. Monnet 1913-8-1 966 Lassen unspecified Comment
  CAS-BOT-BC42894  Ambrosia acanthicarpa Timothy S. Ross; Steve Boyd 1994-9-21 8311 Los Angeles Liebre Mountain: southwesterly slope at the W end of the Mtn., along FSR 7N23, ca 1080 m SW of Sandberg Traingulation Pt 1470 Comment
  CAS-BOT-BC42895  Ambrosia acanthicarpa J. H. Thomas 1956-9-29 6458 Los Angeles near Pasasdena, along dry bottom of reservoir behind Devils Gate Dam Comment
  CAS-BOT-BC42900  Ambrosia acanthicarpa L. R. Abrams 1930-9-19 12908 Los Angeles Vacant lot in Los Angeles Comment
  CAS-BOT-BC42924  Ambrosia acanthicarpa K. A. Stone 1978-11-3 s.n. Fresno Mill Creek at intersection of Ellwood & Pine Flat roads 182 Comment
  CAS-BOT-BC61448  Ambrosia acanthicarpa Nora Pettibone; Frank W. Hubby 1895-11-23 s.n. Ventura Foothills near San Fernando Comment
  CDA13495  Ambrosia acanthicarpa B. Villegas 1997-11-2 s.n. San Luis Obispo Intersection of Hwy 41/ 46 E of Cholame. James Dean crash site. 350 Comment
  CDA20038  Ambrosia acanthicarpa W. West 2002-9-19 PDR P 130203 Alpine Sierra Nevada; Lower Manzanita & Hwy 89 in the vicinity of Woodfords. 0 Comment
  CDA42072  Ambrosia acanthicarpa G. F. Hrusa 1993-5-2 11020 San Luis Obispo 200 meters N of Niblick Rd. Bridge over Salinas River. 0 Comment
  CDA43108  Ambrosia acanthicarpa David J. Keil 1986-9-27 19741 -2 Los Angeles NW Los Angeles County, along I-5, just south of Hungry Valley Road exit, roadside pullout. Comment
  CDA9956  Ambrosia acanthicarpa T. C. Fuller 1961-8-22 6912 Mono Walker. 0 Comment
  CDA9957  Ambrosia acanthicarpa A. C. Browne 1952-10-25 San Diego 0 Comment
  CDA9958  Ambrosia acanthicarpa Wright s Office Nov 1948 Riverside 0 Comment
  GMDRC3373  Ambrosia acanthicarpa J. Andre 2001-5-11 4009 San Bernardino Granite Mountains: Granite Mountains: Approximately 3.5 miles N of I-40 on W side of Kelbaker Rd. T8N R13E SE sec. 20. Elev. 3850 ft. 1174 Comment
  GMDRC3374B  Ambrosia acanthicarpa J. Andre 2001-5-11 4009 San Bernardino Granite Mountains: Approximately 3.5 miles N of I-40 on W side of Kelbaker Rd. T8N R13E SE sec. 20. Elev. 3850 ft. 1174 Comment
  GMDRC955A  Ambrosia acanthicarpa J. Andre 2001-5-11 4009 San Bernardino Granite Mountains: Approximately 3.5 miles N of I-40 on W side of Kelbaker Rd. T8N R13E SE sec. 20. Elev. 3850 ft. 1174 Comment
  HSC87019  Ambrosia acanthicarpa J. Freeman 1988-5-18 San Bernardino 1/4 mile N of Greenspot Rd. 579 Comment
  JEPS103153  Ambrosia acanthicarpa E. Neese, E. Painter 1995-10-24 HL 2211 Monterey Fort Hunter Liggett; (Training Areas 22, 25), ca. 0.05 to 0.1 km NE of San Antonio River channel, ca. 2.5 air km NNW of Quail Top, ca. 0 to 0.2 road km (0 to 0.1 mile) SE of junction of Tule and Sam Jones Roads 250 Comment
  JEPS19960  Ambrosia acanthicarpa W. L. Jepson 1911-9-22 4723 Monterey just w of, near Old Hilltown Spreckles Sugar Refinery; Salinas River, Old Hilltown 30 Comment
  JEPS28135  Ambrosia acanthicarpa Rimo Bacigalupi and P. C. Hutchison 1961-7-28 8024 Mono .5 mi n, along U.S. 395, at Rock Creek crossing Tom's Place 2133 Comment
  JEPS34288  Ambrosia acanthicarpa Rimo Bacigalupi, and L. R. Heckard 1962-11-9 8781 Fresno 4 1/2 mi w of Panoche Station of P.G. and E. Co.; Big Panoche Creek 49 Comment
  JEPS41042  Ambrosia acanthicarpa Elizabeth Day Palmer 1908-8-15 Los Angeles Arroyo Rico Comment
  JEPS60842  Ambrosia acanthicarpa Ernest C. Twisselmann 1969-8-1 15858 Tulare 2.2 mi below, along Big Pine Creek Marques Spring; Sierra Nevada, Kern Plateau, Big Pine Creek 1920 Comment
  JEPS76578  Ambrosia acanthicarpa L. R. Heckard 1977-10-13 4671 Kern n of Forbes Avenue and w Lancaster Road (Edwards Air Force Base); Edwards Air Force Base Comment
  LA200149  Ambrosia acanthicarpa J. Sauer; R. Schubel 1976-12-18 5916 Los Angeles Santa Monica Mountains, Laibu Creek unit Comment
  LA31644  Ambrosia acanthicarpa Peter H. Raven; Henry J. Thompson 1959-9-27 14508 Unknown Comment
  OBI17112  Ambrosia acanthicarpa Robert F. Hoover 1966-9-12 9981 San Luis Obispo Bed of Santa Maria River n of Santa Maria Comment
  OBI17113  Ambrosia acanthicarpa Robert F. Hoover 1966-9-12 9981 San Luis Obispo Bed of Santa Maria River n of Santa Maria Comment
  OBI17115  Ambrosia acanthicarpa Robert F. Hoover 1966-9-12 9982 San Luis Obispo Bed of Santa Maria River n of Santa Maria Comment
  OBI25770  Ambrosia acanthicarpa David J. Keil 1980-9-17 14210 San Luis Obispo Cyn Ranch on Shell Crk rd 6 mi N of hwy 58 Comment
  OBI38208  Ambrosia acanthicarpa Eric Wise 1981-10-23 1319 San Luis Obispo Sinton South Pond on Shell Crk rd 6.4 mi N of hwy 58 Comment
  OBI49583  Ambrosia acanthicarpa David J. Keil 1986-9-27 19756 Ventura NW Ventura 7 mi N of jctn with Lockwood Valley rd along Calif 33 Comment
  OBI52544  Ambrosia acanthicarpa David J. Keil 1995-5-25 25233 Santa Barbara Vandenberg AFB. North Base. Vicinity of triangle formed by jctn of San Antonio Rd W with Lompoc-Csmalia Rd Comment
  OBI54842  Ambrosia acanthicarpa David J. Keil, with Field Botany class 1996-11-3 26065 Kern Eastern slopes of Siera Nevada at Walker Pass along Hwy 178. Comment
  OBI64604  Ambrosia acanthicarpa David J. Keil, with Margriet Wetherwax, Beth Painter, Jody Olsen, Kevin Downing, Charis Bratt, and Lynne Dee (Oyler) Althouse 2000-5-16 28688 San Luis Obispo Camp Roberts; vicinity of Twin Bridges (over Nacimiento River). Comment
  OBI69829  Ambrosia acanthicarpa D. R. Miller 1993-9-15 993 -52 San Luis Obispo Pine Mt Region, at sand pile at Hartman Cabin, E slope Pine Mt 762 Comment
  OBI75616  Ambrosia acanthicarpa David J. Keil 1988-8-24 21042 Mono Hwy 395, 3.4 miles south of junction with Hwy 120 (road to Tioga Pass) Comment
  PGM2323  Ambrosia acanthicarpa Vern Yadon 1982-9-11 Monterey Salinas Valley, Highway 101-Hwy 198 jct, @ junction of two roads Comment
  PGM2353  Ambrosia acanthicarpa Vern Yadon 1982-10-9 Monterey Salinas Valley, Highway 101-Hwy @ 198 jct, @ junction of two roads Comment
  PGM5344  Ambrosia acanthicarpa Beatrice F Howitt 1963-9-28 1750 Monterey Sierra de Salinas, Mt Toro route to, Violini Ranch front of Comment
  PGM5345  Ambrosia acanthicarpa Beatrice F Howitt 1963-9-30 1755 Monterey Salinas Valley, Salinas River, Davis Road Bridge near Comment
  PGM7462  Ambrosia acanthicarpa Yadon & Styer 2005-11-3 Monterey Salinas Valley, Salinas River @ Toro Creek confluence, at confluence with Toro Cr Comment
  POM13559  Ambrosia acanthicarpa Philip A. Munz 1922-11-20 6564 Los Angeles Charter Oak, near Covina. Comment
  POM14308  Ambrosia acanthicarpa Philip A. Munz 1922-10-15 6545 Los Angeles Claremont. 366 Comment
  POM180478  Ambrosia acanthicarpa I. L. Wiggins 1929-10-6 4207 Kern Near Bakersfield Comment
  POM181663  Ambrosia acanthicarpa I. L. Wiggins 1929-10-5 4180 Fresno 1/2 mi. N of Fresno Comment
  POM193528  Ambrosia acanthicarpa L. R. Abrams 1930-9-19 12908 Los Angeles Vacant Lot. Comment
  POM201848  Ambrosia acanthicarpa L. M. Booth 1932-7-30 1340 Orange Santa Ana River, 2 miles from ocean Comment
  POM266300  Ambrosia acanthicarpa J. C. Roos 1942-9-19 1711 Los Angeles West Los Angeles. Comment
  POM277139  Ambrosia acanthicarpa E. S. Steele 1935-10-11 s.n. Los Angeles Glen Oaks Hills, Glendale Comment
  POM289595  Ambrosia acanthicarpa Lyman Benson 2063 Kern East Bakersfield. Kern River Watershed. 183 Comment
  POM294254  Ambrosia acanthicarpa Lyman Benson 11555 Los Angeles Claremont. Pacific slope. 366 Comment
  POM308932  Ambrosia acanthicarpa Anonymous 1943-6-22 920 Los Angeles Dalton road, half mile below fork to Tanbark and Glendora road 899 Comment
  POM324259  Ambrosia acanthicarpa Keith C. Hughes 1960-10-15 288 Kern Second Canyon north of Lebec. 1159 Comment
  RSA0025515  Ambrosia acanthicarpa John F. Emmel 1986-4-12 990 San Bernardino Central Mojave Desert: sand dunes area ca. 20 road mi E of Twentynine Palms, near Clarks Pass. 579 Comment
  RSA0031475  Ambrosia acanthicarpa April Garbat, Aaron Sedgwick 2012-12-18 03 San Bernardino Mojave Desert: Helendale, CA. At the intersection of Shadow Mtn Road and Helendale Road, in the sandy shoulder east of the Helendale Road. Comment
  RSA004144  Ambrosia acanthicarpa Fay A. MacFadden 1929-09 1026 Los Angeles Verdugo Mountains: La Tuna Canyon. Comment
  RSA0105779  Ambrosia acanthicarpa Alan Romspert 2000-7-28 s.n. San Bernardino Santa Ana Riverbed & Jtn w/RIX inflow transcet. Comment
  RSA0106068  Ambrosia acanthicarpa Alan Romspert 2000-7-28 s.n. San Bernardino Santa Ana Riverbed, RIX discharge Transect. Comment
  RSA0106317  Ambrosia acanthicarpa Lyman Benson 1946-5-13 12091 Orange Corona del Mar. 15 Comment
  RSA120223  Ambrosia acanthicarpa Chas. H. Quibell, Edith M. Quibell 1953-9-26 3582 San Benito Rising rolling slopes n. of Griswold Hills and e. of Panoche Valley, s. of Hiway 180. Old sheep camp rd. up near footslopes of the Hills s. of the old ranch on s. side of 180 not far. e. of Panoche Valley. Comment
  RSA132023  Ambrosia acanthicarpa Delzie Demaree 1959-8-18 41520 Lassen P.O. Termo. Comment
  RSA132225  Ambrosia acanthicarpa Chas. H. Quibell 1953-10-5 3604 Fresno Bank between road and railroad where Wishon Ave. underpasses Santa Fe R. R. - N side- Fresno. Comment
  RSA132876  Ambrosia acanthicarpa Simon Simonian 1953-10-24 1484 Fresno Oleander N Br. Ditch, E-W sect. xing Cedar Ave. S of Clayton Ave. About 8 mi. S of Fresno. Comment
  RSA20164  Ambrosia acanthicarpa L. S. Rose 1937-9-29 37702 Mono Mono lake 2043 Comment
  RSA212631  Ambrosia acanthicarpa E. C. Twisselmann 1969-8-1 15858 Tulare Big Pine Creek, 2.2 miles below Marques Spring 1921 Comment
  RSA216305  Ambrosia acanthicarpa E. C. Twisselmann 1970-10-9 17512 Fresno Warthan Creek at the Parkfield Road. 595 Comment
  RSA218784  Ambrosia acanthicarpa Mary DeDecker 1969-8-31 2398 Inyo Owens Valley- Manznar Road between airport and Locust Ditch. 1143 Comment
  RSA274077  Ambrosia acanthicarpa Richard L. Zembal 1974-9-15 019 Inyo Open ground at Bircham Spg. 1726 Comment
  RSA297847  Ambrosia acanthicarpa S. Castagnoli, Greg de Nevers, R. Doug Stone 1980-9-15 299 Inyo Gravelly outwash near front gate at Crystal Spring, Beck Canyon. 1128 Comment
  RSA320375  Ambrosia acanthicarpa J. R. Shevock 1979-10-1 6624 Kern Along California highway 178, Kern River Canyon, Sequoia National Forest. 366 Comment
  RSA346902  Ambrosia acanthicarpa James D. Morefield 1984-8-12 2534 Inyo White Mountains. 1.6 mile N 60 degree E of Westgard Pass summit in Payson Canyons, Deep Springs Valley drainage. 1899 Comment
  RSA416893  Ambrosia acanthicarpa F. R. Fosberg 1931-11-7 7206 Los Angeles Small creek near Castaic, Santa Clara Valley. 300 Comment
  RSA416895  Ambrosia acanthicarpa Robert Gustafson 1980-9-16 1897 Los Angeles Ballona Wetlands, Area 3. Comment
  RSA416896  Ambrosia acanthicarpa Louis Greata 1900-10 s.n. Los Angeles Eagle Rock Valley Comment
  RSA416898  Ambrosia acanthicarpa Anstruther Davidson 1893-09 s.n. Los Angeles Hollywood. Comment
  RSA416901  Ambrosia acanthicarpa Wm. Martin 1971-9-7 20007 Inyo Vicinity of Olancha, near Owens Lake. 991 Comment
  RSA416906  Ambrosia acanthicarpa Christopher Davidson 1975-8-30 3244 San Bernardino 7.8 mi S and W of Onxy Summit on Hwy 38; College Camp rd branching S of 38. 1982 Comment
  RSA416907  Ambrosia acanthicarpa H. S. Gentry 1939-10 4659 San Diego WEst side of Colorado Desert. -30 Comment
  RSA416908  Ambrosia acanthicarpa H. M. Pollard 1959-10-9 s.n. Santa Barbara Southern Pacific Railroad east of Summerland. Comment
  RSA488232  Ambrosia acanthicarpa H. M. Pollard 1951-11-23 s.n. Santa Barbara Along RR near Summerland. Comment
  RSA515735  Ambrosia acanthicarpa L. F. LaPre 1988-9-21 s.n. Kern In wash, 5 mi. E of Backersfield (sec. 35). Comment
  RSA5214  Ambrosia acanthicarpa C. B. Wolf 1932-9-13 4069 Los Angeles Bryant Ranch near middle of S boundary of SE 1/4 sect 27. 5 Comment
  RSA524912  Ambrosia acanthicarpa Mary DeDecker 1989-9-29 6175 Inyo Owens Valley: west of Independence; Foothill Road near Symmes Creek. 1706 Comment
  RSA557855  Ambrosia acanthicarpa D. Charlton, Victoria Hamilton 1992-5-4 s.n. Mono Volcanic Tablelands 7 miles NW of Bishop. Bishop tuff, road along base of scarp and north of Owens River in sports fishing area. 1280 Comment
  RSA585027  Ambrosia acanthicarpa Timothy S. Ross 1991-11-15 s.n. Los Angeles Claremont: RSABG grounds: Indian Hill Mesa. 405 Comment
  RSA587172  Ambrosia acanthicarpa Orlando Mistretta 1995-10-2 1931 Los Angeles San Gabriel Mountains: Little Rock Creek. Upstream from Basin Campground 1037 Comment
  RSA589100  Ambrosia acanthicarpa Orlando Mistretta 1994-9-13 1457 Los Angeles San Gabriel Mountains; Santiago Canyon; Santiago Creek near jct. of Forest Road 4N20 and BM 3980. 1213 Comment
  RSA592226  Ambrosia acanthicarpa L. C. Wheeler 1967-4-30 9236 Los Angeles San Gabriel Mountains. Limekiln Canyon. 549 Comment
  RSA615616  Ambrosia acanthicarpa Mary DeDecker 1957-9-19 768 Inyo Owens Valley: City of Independence. 1195 Comment
  RSA618495  Ambrosia acanthicarpa Mary DeDecker 1969-8-31 2398 Inyo Owens Valley-Manzanar: Locust Ditch north of Manzanar Road, between Manzanar airport and Owens River. 1143 Comment
  RSA668153  Ambrosia acanthicarpa Ian Swift 2001-9-2 308 Los Angeles W. Antelope Valley, Desert Pines Wildlife Sanctuary, Ave G and 200th St. West; north flank of Portal Ridge, lower Kings Canyon Wash. 939 Comment
  RSA695720  Ambrosia acanthicarpa Keith E. Hoffmaster 1933-9-24 s.n. Los Angeles Near Santa Ana. Comment
  RSA77365  Ambrosia acanthicarpa Elroy Robinson 1935-9-21 s.n. Fresno In field W of Palm and Weldon Ave. Comment
  RSA783366  Ambrosia acanthicarpa J. D. Olmsted 1959-9-22 979 Orange Along Santa Ana River N of Sycamore Park along Hwy. 8-9mile WSW of Corona north of Hwy. 134 Comment
  RSA791492  Ambrosia acanthicarpa R. F. Thorne, E. W. Lathrop, Walter Wisura 1977-7-8 49612 Orange Santa Ana Mountains: along Ortega Highway (74) about 2.5 miles above San Juan Fire Station Comment
  RSA794622  Ambrosia acanthicarpa J. Andre 2003-4-15 4481 Inyo Owens Valley: Manzanar Historic Site, northwest corner. 1186 Comment
  RSA93934  Ambrosia acanthicarpa F. W. Peirson 1919-11-8 5275 Orange Road south of Arch Beach. Comment
  RSA93935  Ambrosia acanthicarpa F. W. Peirson 1919-10-26 271 Los Angeles Rubio Reservoir, south base of San Gabriel Mts. Comment
  SBBG45022  Ambrosia acanthicarpa J. Snow 1932-1 Los Angeles Bryant Ranch, near Long Beach; T4S, R11W, SE/2 S27 Comment
  SBBG54460  Ambrosia acanthicarpa L. R. Abrams 1930-9-19 12908 Los Angeles Los Angeles Comment
  SBBG61228  Ambrosia acanthicarpa unknown -Sep-1893 Los Angeles Los Angeles Comment
  SBBG61229  Ambrosia acanthicarpa R. Hoffmann 1927-9-21 Ventura between Piru and Castaic Comment
  SD81142  Ambrosia acanthicarpa Darley F. Howe 1971-8-23 Inyo By Owens River east of Big Pine. 1220 Comment
  SD81211  Ambrosia acanthicarpa Darley F. Howe 1971-9-30 Inyo Two miles east of Deep Springs turn off. 1645 Comment
  SD92975  Ambrosia acanthicarpa W. Bertsch 1953-10-25 340 Kern Mt. Pinos near Lebec. 1220 Comment
  SD98887  Ambrosia acanthicarpa Darley Howe 1976-10-8 4929 Mono Inyo National Forest, 6.4 miles from north entrance. 2075 Comment
  SDSU6267  Ambrosia acanthicarpa D. F. Howe 1976-10-8 4929 Inyo 6.4 miles from entranceto Inyo National Forest east of Big Pine. 1981 Comment
  SDSU6856  Ambrosia acanthicarpa F. Young Berg 1933-10-9 1632 Los Angeles Vacant lot, Claremont. Comment
Read comments
Mar 3 2009
  SEINET10474398  Ambrosia acanthicarpa Mary Susan Taylor 1976-9-3 Taylor 1247 Monterey Abundant in Riparian Woodland, under bridge over Salinas River, at junction of Chualar Rd and River Rd, ca. 15 mi SE of Salinas. 30 Comment
  SEINET10474400  Ambrosia acanthicarpa Mary Susan Taylor 1983-4-6 Taylor 5262 San Bernardino T8N R21E. Creosote Bush Scrub, around KOA Camp- ground, n end of Needles. Comment
  SEINET10617150  Ambrosia acanthicarpa David J. Keil 1976-8-20 Keil K 11772 San Luis Obispo 1.3 mi. W of Kern Co. boundary on CA Rte. 166. Comment
  SEINET11840763  Ambrosia acanthicarpa C. R. Orcutt 1882-1 Unknown Pinene Forest Comment
  SEINET11855045  Ambrosia acanthicarpa L. S. Rose 1937-1 Mono Mono Lake 2042 Comment
  SEINET13262388 Image available Ambrosia acanthicarpa P. C. Martinelli 1967-8-22 s.n. Mono Highway 395 S. Comment
  SEINET13262391 Image available Ambrosia acanthicarpa P. C. Martinelli 1967-8-22 s.n. Mono Highway 395 S. Comment
  SEINET5514074  Ambrosia acanthicarpa J. C. Beatley 1969-1 Los Angeles along rdsides Rte 138 near San Bernardino County line NTS Herbarium coll. Drainage area: Antelope Valley drainage 1067 Comment
  SEINET5710284  Ambrosia acanthicarpa Elizabeth M. Harris 1988-1 754 San Luis Obispo Growing on dunes along Morro Bay Beach opposite of Morro Dunes RV Park.; Morro Bay Beach Comment
  SEINET6738517 Image available Ambrosia acanthicarpa S. B. Parish 1907-10-7 6496 San Bernardino San Bernadino Valley 300 Comment
  SEINET6738599 Image available Ambrosia acanthicarpa M. Lavin 1980-7-10 SW 85 Mono East Walker River near stock cross. Comment
  SEINET6738624 Image available Ambrosia acanthicarpa M. Lavin, K. Walters 1980-9-13 SW 143 Mono Cottonwood Mdws. E side Sweetwater Mtns. (Cottonwood Cr - Burcham Flat Rd.) 2195 Comment
  SEINET6738693 Image available Ambrosia acanthicarpa M. Lavin 1980-8-13 SW 127 Mono E. Walker River, N of Bridgeport, CA along rt. 22 Comment
  SEINET7042426  Ambrosia acanthicarpa A. G. Vestal 1963-3-30 s.n. Kern Ca 3 miles east of Arvin and 1 mile south of Bear Mountain Roadrangle Arvin quad. UTM Zone 11, 339612mE, 3896335mN. Comment
  SFV14733  Ambrosia acanthicarpa J. C. Dittes, P. Dittes 1989-9-23 6 Los Angeles East side of lower Castaic Lake along Parker Road. Comment
  SFV16846  Ambrosia acanthicarpa J. D. Dilley 1996-10-26 s. n. Los Angeles San Gabriel Mountains Vincent Gap on Angeles Crest Highway. In gravelly soil by parking lot. 2134 Comment
  SJSU937  Ambrosia acanthicarpa J. W. Tilden 1956-9-3 1031 Monterey Arroyo Seco about 18 miles SW of Greenfield Comment
  UC1300325  Ambrosia acanthicarpa Robert M. Lloyd 1963-7-12 2978 Inyo at,( mouth of Birch Creek Canyon) Westgard Pass; White Mountains, Birch Creek Canyon 1539 Comment
  UC1321335  Ambrosia acanthicarpa R. F. Hoover 1966-9-12 9982 San Luis Obispo n of, (bed of Santa Maria River) Santa Maria; Santa Maria River Comment
  UC1562326  Ambrosia acanthicarpa Vernon Oswald and Lowell Ahart 1990-7-25 4401 Plumas .9 mi e on Hwy 70, (Vinton Cemetery) Vinton; Vinton Cemetery Comment
  UC217956  Ambrosia acanthicarpa P. A. Munz 1922-10-15 6545 Los Angeles Claremont 365 Comment
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Aug 14 2010
  UC29421  Ambrosia acanthicarpa S. W. Austin 419 Inyo Comment
  UC31944  Ambrosia acanthicarpa S. B. Parish 1888-10-1 San Bernardino Comment
  UC34490  Ambrosia acanthicarpa Prof. Brewer Dec 1-5, 1860 22 Los Angeles sandy flats near town Los Angeles Comment
  UCD128705  Ambrosia acanthicarpa Beecher Crampton 1977-9-13 4607 Merced US Hwy 99 freeway, 1.5 miles south of Delhi. Comment
  UCD128707  Ambrosia acanthicarpa James Dilley 1996-10-26 s.n. Los Angeles San Gabriel Mountains, Angeles National Forest, Vincent Gap, on Angeles Crest Hw. Comment
  UCD128711  Ambrosia acanthicarpa John Thomas Howell 1967-11-3 44064 Tulare Near midpoint along Road 160, about 4.5 miles east-northeast of Pixley. 83 Comment
  UCD128717  Ambrosia acanthicarpa Daryl Koutnik; Bruce Holguin 1978-4-1 204 Los Angeles Mint Canyon on Sierra Hwy, 5 miles northwest of State Hwy 14. 563 Comment
  UCD128720  Ambrosia acanthicarpa P. A. Munz 1922-10-15 6545 Los Angeles Claremont. 365 Comment
  UCD128722  Ambrosia acanthicarpa Chas. H. Quibell; Edith M. Quibell 1953-9-26 3582 Fresno north of Griswold Hiss and east of Panoche Valley, south of Highway 1-80. Old Sheep camp road up near footslopes of the Hills. South of the old ranch on south side of I-80 not far east of Panoche Valley. Comment
  UCD128724  Ambrosia acanthicarpa Elroy Robinson 1935-9-21 s.n. Fresno Palm and Weldon Avenues, Fresno. 91 Comment
  UCD128864  Ambrosia acanthicarpa J. B. Perret 1921-11-22 s.n. Los Angeles San Fernando. Comment
  UCD128872  Ambrosia acanthicarpa Ira L. Wiggins 1929-10-5 4180 Fresno 0.5 mile north of Fresno. Comment
  UCSB27640  Ambrosia acanthicarpa Lavinger, S. 1975-10-27 Los Angeles On Little Tujunga Road 3 miles south from its junction with Bear Drive; Little Tujunga Canyon 457 Comment
  UCSB31545  Ambrosia acanthicarpa Miller, Brian 1963-10-13 Kern Mt. Pinos 1981 Comment
  UCSB38042  Ambrosia acanthicarpa Goodwin, Cindy 1978-11-19 Santa Barbara Santa Maria Riverbed near Guadalupe Comment
  UCSC001014  Ambrosia acanthicarpa D. J. Norman 1967-10-22 160 Monterey near Corral de Tierra, along dry roadside near Corral de Tierra. Corral de Tierra 183 Comment
  UCSC010185  Ambrosia acanthicarpa Unknown 2012-10-13 Monterey El Toro Creek , Fort Ord National Monument (Region N6) Comment
  CLARK-A1656-798  Franseria acanthicarpa Theo Glenn 1982-10-7 Riverside Snow Creek 396 Comment
  PASA836  Franseria acanthicarpa Sally Ellis 1939-10-2 Los Angeles Claremont Comment



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