CCH1:
Featuring California vascular plant data from the Consortium of California Herbaria and other sources
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Please cite data retrieved from this page:
Biodiversity data provided by the participants of the Consortium of California Herbaria (Accessed through CCH1 Data Portal, ucjeps.berkeley.edu/consortium/, 2022 June 27.

Literature Citation:
CCH1 Portal. 2022. Biodiversity data provided by the participants of the Consortium of California Herbaria (https://ucjeps.berkeley.edu/consortium/ Accessed on June 27).

Records are made available under the CCH Data Use Terms.

Please send questions or comments to Jason Alexander (jason_alexander@berkeley.edu).


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    An accepted name was found==>Xanthium spinosum.
    Synonyms were found.

    You searched for: Xanthium spinosum

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      F CCH1_AIDherbscientific namecoll. namecoll. num.formatted datecountylocality
    UCSB_SCIRH00121UCSBAcanthoxanthium spinosumMarla Daily1481976-9-16 Santa BarbaraPrisoners' Harbor, north side of barn, Santa Cruz Island.
    AHUC105350DAVXanthium spinosumBeecher Crampton9341952-11-10 SacramentoSacramento County: Brown Hereford Ranch about 2 miles east of Wilton.
    AHUC105351DAVXanthium spinosumBeecher Crampton66961962-10-09 Napa1.25 miles southwest Angwin, Howell Mtn. Road. Conn Creek.
    AHUC105352DAVXanthium spinosumBeecher Crampton66961962-10-09 Napa1.25 miles southwest Angwin, Howell Mtn. Road. Conn Creek.
    ARF0448BLMARXanthium spinosumJennifer Anthony-Wheeler4482008-10-1 Humboldtgrwing on Collenberg dairy, Mad River Road
    CAS-BOT382126CASXanthium spinosumAbrams, L. R.; Wiggins, I. L.2931931-7-3 Santa BarbaraSanta Barbara Island, Channel Islands
    CAS-BOT382127CASXanthium spinosumPollard, Henry M.sn1956-9-11 Santa BarbaraHope Ave. Santa Barbara
    CAS-BOT382128CASXanthium spinosumPhilbrick, Ralph N.; Benedict, Michael R.B65-13931965-6-13 Santa BarbaraBeach at mouth of Posa Canyon, Santa Cruz Island
    CAS-BOT382162CASXanthium spinosumRich, W. H.sn1912-4-1 Santa CruzSwanton
    CAS-BOT382163CASXanthium spinosumThomas, John H.24611950-10-1 Santa CruzRancho del Oso, about 1 mile inland from the coast, 8.5 miles NW of Davenport
    CAS-BOT382164CASXanthium spinosumThomas, John H.24981950-11-12 Santa CruzAbout 1 mile N or Corralitos
    CAS-BOT382165CASXanthium spinosumWells, Mary P.9791989-5-6 SonomaRincon Valley, Santa Rosa
    CAS-BOT382166CASXanthium spinosumde Nevers, Greg82311987-7-10 SonomaPepperwood Ranch Natural Preserve, 3450 Franz Valley Rd., Santa Rosa Murray Ranch, at NW border of Pepperwood
    CAS-BOT382167CASXanthium spinosumRubtzoff, Peter8441951-11-24 SonomaPitkin Marsh, near Forestville
    CAS-BOT382169CASXanthium spinosumKnight, Walter; Knight, Irja2571963-9-3 SonomaWiggins Hill
    CAS-BOT382170CASXanthium spinosumPettibone, Nora; Hubby, Frank W.sn1897-10-30 VenturaOjai Valley
    CAS-BOT382171CASXanthium spinosumRaven, Peter H.; Thompson, Henry J.145191959-9-27 VenturaTriunfo Corner
    CAS-BOT382173CASXanthium spinosumPollard, Henry M.sn1972-6-20 Venturabehind Taylor Ranch bluffs immediately above ranch entrance, Highway 101 about 1/2 mi. W of Ventura River
    CAS-BOT382174CASXanthium spinosumPollard, Henry M.sn1966-9-1 Venturabelow intersection of Rice and Fairview Rds., Ventura River flood-plain near Meiners Oaks
    CAS-BOT382175CASXanthium spinosumPollard, Henry M.sn1944-9-17 VenturaMaricopa Rd bet. Fairview Rd. and Matilija Canyon, Ojai Valley
    CAS-BOT382401CASXanthium spinosumOberlander, George3421949-7-30 Santa ClaraUpper Crystal Spr. [Spring] Lake
    CAS-BOT382402CASXanthium spinosumWheeler, Phillip C.s.n.1965-6-19 Santa ClaraCrocker Land Park, Brisbane.
    CAS-BOT382403CASXanthium spinosumWheeler, Phillip C.s.n.1965-6-19 Santa ClaraCrocker Industrial Park.
    CAS-BOT382404CASXanthium spinosumEastwood, Alices.n.1917-12-8 San FranciscoGolden Gate Park
    CAS-BOT382405CASXanthium spinosumHowell, John Thomas321591957-5-5 San Francisco6 & Harrison Sts
    CAS-BOT382406CASXanthium spinosumHowell, John Thomas314681956-6-3 San Franciscoat east end of Shafter St.
    CAS-BOT382407CASXanthium spinosumHowell, John Thomass.n.1957-9-29 San FranciscoNear Gilman School & Park, n. base of Bayview Hills
    CAS-BOT382408CASXanthium spinosumEdwards, Hy1701876-10-1 San FranciscoSan Francisco
    CAS-BOT382409CASXanthium spinosumRubtzoff, Peter30391956-11-3 San FranciscoSan Miguel Hills. Bottom of canyon east of O'Shanghnessy Blvd.
    CAS-BOT382410CASXanthium spinosumBush, Dr. Mildreds.n.1955-1-1 San FranciscoSan Francisco State College Campus, San Francisco
    CAS-BOT382411CASXanthium spinosumHowell, John Thomas395071963-6-22 MontereySalinas Valley 2 mi s. of King City
    CAS-BOT382412CASXanthium spinosumAbbott, E. K.s.n.1889-8-1 Monterey
    CAS-BOT382413CASXanthium spinosumAbbott, E. K.s.n.1889-8-1 Monterey
    CAS-BOT382414CASXanthium spinosumHowell, John Thomas408091964-6-29 San Luis ObispoCambria
    CAS-BOT382415CASXanthium spinosumTwisselmann, Ernest C.14321954-7-17 San Luis ObispoPalo Prieta Canyon: 6 miles south of Cholame.
    CAS-BOT382416CASXanthium spinosumTwisselmann, Ernest C.14321954-7-17 San Luis ObispoPalo Prieta Canyon: 6 miles south of Cholame.
    CAS-BOT382417CASXanthium spinosumTwisselmann, Ernest C.7601953-9-9 San Luis ObispoTwisselmann Ranch: Eastern San Luis Obispo County.
    CAS-BOT382418CASXanthium spinosumTwisselmann, Ernest C.46741958-8-11 San Luis ObispoDorothy Twisselmann Ranch, eastern San Luis Obispo County.
    CAS-BOT382419CASXanthium spinosumTwisselmann, Ernest C.6101951-1-1 San Luis ObispoChris Twisselmann Ranch: Eastern San Luis Obispo County.
    CAS-BOT382420CASXanthium spinosumTwisselmann, Ernest C.46741958-8-11 San Luis ObispoDorothy Twisselmann Ranch: eastern San Luis Obispo County.
    CAS-BOT382421CASXanthium spinosumTwisselmann, Ernest C.136981967-9-9 San Luis ObispoPalo Prieta Creek below Ortega Spring.
    CAS-BOT382464CASXanthium spinosumThomas, J. H.45901954-9-3 Santa Clara'Old Winery', between Mausoleum and Stanford Convalescent Home, Stanford University.
    CAS-BOT382465CASXanthium spinosumThomas, J. H.64431956-9-8 Santa Claraalong Mayfield Ave. between Stanford Ave. and Frenchman's Road.
    CAS-BOT382466CASXanthium spinosumKnoche, E. L. H.s.n.1929-9-3 Santa ClaraSan Jose
    CAS-BOT382467CASXanthium spinosumClark, Miss. M. E.s.n.1909-10-9 Santa ClaraEnd of Embarcadero Road, Palo Alto.
    CAS-BOT382468CASXanthium spinosumRandall, Josephine D.1021907-7-6 Santa ClaraNear San Antonio Creek
    CAS-BOT382469CASXanthium spinosumRandall, Josephine D.s.n.1907-9-28 Santa Claranear bay, Palo Alto
    CAS-BOT382470CASXanthium spinosumDickson, Misss.n.1996-11-12 Santa Claranear Stanford University
    CAS-BOT382471CASXanthium spinosumMartineau, Robert4131974-10-21 Santa ClaraFoothills of the eastern side of the Santa Cruz Mountains. Five miles south of center of Palo Alto.
    CAS-BOT382472CASXanthium spinosumClausen, J.5981932-10-9 Santa Clara8.3 miles east of Gilroy on the Pacheco Pass Road.
    CAS-BOT382473CASXanthium spinosumMcClintock, Elizabeth; Reeberg, Pauls.n.1988-6-7 Santa Claraalong north Hill Drive, industrial park, Guadalupe Valley.
    CAS-BOT382474CASXanthium spinosumThomas, J. H.11481949-10-16 Santa Clarajust north of outlet of San Gregorio Creek.
    CAS-BOT382475CASXanthium spinosumThomas, J. H.114371965-8-21 Santa ClaraEast Palo Alto near Bayshore and University Avenue.
    CAS-BOT383625CASXanthium spinosumCovel, Paul F.6491937-9-10 AlamedaOakland Hills
    CAS-BOT383626CASXanthium spinosumHansen, Geo.4791893-8-1 AmadorAgr Station
    CAS-BOT383627CASXanthium spinosumClemens, Mary Strongs.n.1920-9-19 AmadorJackson
    CAS-BOT383628CASXanthium spinosumAhart, Lowell38511982-10-11 ButteNorth of the check-in-station, Gray Lodge, about 12 miles south-west of Gridley
    CAS-BOT383629CASXanthium spinosumHeller, A. A.126551916-9-9 ButteNear Durham
    CAS-BOT383630CASXanthium spinosumHowell, John Thomas300831954-9-6 Calaveras3 miles se. of Angels Camp
    CAS-BOT383631CASXanthium spinosumBlaisdell, M.D., F. E.s.n.1931-3-30 CalaverasMokelumne Hill
    CAS-BOT383632CASXanthium spinosumStinchfield, Roxana4001916-7-8 ColusaTruck garden, Stinchfield ranch near Sycamore
    CAS-BOT383633CASXanthium spinosumMcGregor, E. A.s.n.1921-8-8 Del NorteRequa and Vicinity. 3 miles up Klamath
    CAS-BOT383634CASXanthium spinosumHelmkamp, G. K.; Helmkamp, E. A.156922009-10-20 El DoradoSierra Nevada Mountains Foothills: Sand Ridge Road 0.9 mile east of CA-49, at the junction with Morales Ranch Road, 6.8 air mi. SSW (118 deg. ) of Diamond Springs Elev. given as 1250 ft
    CAS-BOT383635CASXanthium spinosumMcFadden, Davids.n.1978-10-13 FresnoTurkey ranch just south of Humphreys Station on Dry Creek
    CAS-BOT383636CASXanthium spinosumDuncan, Carl D.s.n.1920-9-22 HumboldtHoopa Valley
    CAS-BOT383637CASXanthium spinosumBlankinship, J. W.s.n.1924-10-12 LakeClear Lake
    CAS-BOT383638CASXanthium spinosumMcCallum, Mrs. Alexanders.n.1898-7-1 LakeClear Lake
    CAS-BOT383639CASXanthium spinosumSmith, Huron H.51681912-7-2 Los AngelesAvalon, Santa Catalina Isl.
    CAS-BOT383640CASXanthium spinosumAbrams, LeRoy41811904-9-2 Los AngelesLos Angeles
    CAS-BOT383641CASXanthium spinosumHowell, John Thomas538961980-9-8 MarinBottom of Alpine Lake near Bon Tempe Lake dam
    CAS-BOT383642CASXanthium spinosumEastwood, Alices.n.1917-9-1 MarinMill Valley
    CAS-BOT383643CASXanthium spinosumBreedlove, D. E.171371969-11-27 MariposaAlong Dogtown road 3 miles above Coulterville
    CAS-BOT383644CASXanthium spinosumWheeler, Clare R.9961979-5-12 MendocinoJ. Cook's garden - Ukiah
    CAS-BOT383645CASXanthium spinosumTrue, Gordon H.1931961-8-24 NevadaG. H. True Ranch, 7 miles south-west of Grass Valley on McCourtney Road
    CAS-BOT383646CASXanthium spinosumHowell, John Thomas25601927-6-20 OrangeNorth side of Santa Ana Canon [Canyon]
    CAS-BOT383647CASXanthium spinosumHowell, John Thomas; Wagnon, H. Keith536831980-5-27 PlumasQuincy
    CAS-BOT383648CASXanthium spinosumBellues.n.1933-7-1 Sacramento
    CAS-BOT383649CASXanthium spinosumBentley, Georgias.n.1919-9-1 SacramentoVicinity of Sacramento
    CAS-BOT383650CASXanthium spinosumParish, S. B.; Parish, W. F.11031881-9-1 San BernardinoSan Bernardino
    CAS-BOT383651CASXanthium spinosumStanford, E. E.581926-10-14 San JoaquinNear Stockton
    CAS-BOT383652CASXanthium spinosumLawrence, Wm. E.12001917-8-17 SiskiyouJust west of Klamath Hot Springs
    CAS-BOT383653CASXanthium spinosumEastwood, Alice100141920-7-31 SolanoVallejo
    CAS-BOT383654CASXanthium spinosumAhart, Lowells.n.1977-7-24 SutterSouth Butte, Sutter Buttes. On the south-west side of the South Butte
    CAS-BOT383655CASXanthium spinosumAhart, Lowell43611983-8-27 SutterA little south of the Myers home, Myers Ranch, Sutter Buttes
    CAS-BOT383656CASXanthium spinosumShevock, James R.88691981-7-26 TulareSierra Nevada, Greenhorn Mountains, Sequoia National Forest. Along Parker Pass Road, approximately 5 miles from Tyler Creek
    CAS-BOT383657CASXanthium spinosumShevock, James R.89761981-8-21 TulareSierra Nevada, Greenhorn Mountains, Sequoia National Forest. Along Parker Pass Road, approximately 5 miles from Tyler Creek
    CAS-BOT383658CASXanthium spinosumWilliamson, Mrs. W. J.2971919-7-1 TuolumneSpring Gulch near Bear Creek
    CAS-BOT383659CASXanthium spinosumQuick, C. R.72-111972-7-19 YoloMerritt Island, on levee. About 20 miles SSW of Sacramento, just west of the Sacramento River, in the SE corner of Yolo Co.
    CAS-BOT383660CASXanthium spinosumZeile, E. M.11091921-9-17 Contra CostaRodeo
    CAS-BOT383661CASXanthium spinosumKnight, Walter31931978-8-27 Contra CostaContra Loma Regional Park, S. of Antioch
    CAS-BOT383662CASXanthium spinosumBreedlove, D. E.167131969-10-18 Contra CostaAlong the road bank on Reliez Valley Road at the junction with Gloria Terrace; Lafayette
    CAS-BOT383663CASXanthium spinosumTwisselmann, Ernest C.97141964-7-17 KernSan Joaquin Valley. Sycamore Creek, 0.5 mile east of Arvin
    CAS-BOT383664CASXanthium spinosumTwisselmann, Ernest C.97141964-7-17 KernSan Joaquin Valley. Sycamore Creek, 0.5 mile east of Arvin
    CAS-BOT383665CASXanthium spinosumTwisselmann, Ernest C.97541964-7-17 KernTehachapi Mountains. Tejon Ranch: Bear Trap Road at Lake Road Gate (mouth of Bear Trap Canyon)
    CAS-BOT383666CASXanthium spinosumHardham, Clare B.12321956-8-3 San Luis ObispoSanta Lucia Mountains. T. Dellaganna Ranch, near Cienega Creek
    CAS-BOT383667CASXanthium spinosumTwisselmann, Ernest C.97541964-7-17 KernTehachapi Mountains. Tejon Ranch: Bear Trap Road at Lake Road Gate (mouth of Bear Trap Canyon)
    CAS-BOT383668CASXanthium spinosumShevock, James R.90281981-9-7 KernAlong Caliente Creek Road 2 miles east of the junction with the Bodfish-Caliente Road
    CAS-BOT383669CASXanthium spinosumShevock, James R.66641979-10-23 KernA small tributary to Erskine Creek. Piute Mountains, Sequoia National Forest
    CAS-BOT383670CASXanthium spinosumFarnsworth, Evalyn L.2451964-7-27 KernGreenhorn Range. Farnsworth Ranch, 2.5 miles southwest of Glennville
    CAS-BOT383671CASXanthium spinosumHowell, John Thomas389501962-9-26 KernGlennville, Greenhorn Mountains
    CAS-BOT383672CASXanthium spinosumHowell, John Thomas475631970-11-10 KernOn Ranchiera Road at Rattlesnake Creek
    CAS-BOT383673CASXanthium spinosumSanders, A. C.; Boyd, S. D.223571998-11-22 KernSE Sierra Nevada Mtns.: Jawbone Canyon, north of Cross Mtn., near White Mtn. and confluence with Cottonwood Creek Elev. given as 2900 ft
    CAS-BOT54220CASXanthium spinosumKildale, Doris K.27111926-9-11 ModocNear Alturas.
    CATA1002CATAXanthium spinosumMark L. Hoefs18821994-7-18 Los AngelesSanta Catalina Island: Northeast of upper end of road to White's Landing
    CATA1090CATAXanthium spinosumMark L. Hoefs20401995-5-16 Los AngelesSanta Canon, near road to Two Harbors
    CATA293CATAXanthium spinosumMark L. Hoefs3111973-6-04 Los AngelesSanta Catalina Island: Field above golf course #4 green, Avalon Canon
    CDA0008998CDAXanthium spinosumM.K. Bellue1933-7-01 Sacramento.
    CDA0008999CDAXanthium spinosumM.K. Bellue1933-7-06 Sacramento.
    CDA0009000CDAXanthium spinosumT.C. Fuller1957-12-17 Napa3 miles west of Napa.
    CDA0009001CDAXanthium spinosumT.C. Fuller142691965-11-09 SonomaAbove road cut, west side of Redwood Highway (Highway 101) to Cloverdale, 5 miles north of Healdsburg.
    CDA0009002CDAXanthium spinosumW.E. Simonds1958-8-07 Napa10 miles west of Napa, Highway #37.
    CDA0009003CDAXanthium spinosumF. Bowcutt19651994-10-31 MendocinoSinkyone Wilderness State Park. 80 air miles south of Eureka, 20 air miles south of Garberville, 10 air miles west of Leggett. Along Usal Road just south of bridge over Usal Creek.
    CDA0017844CDAXanthium spinosumAustin Griffithss.n.1981-11-07 San Luis ObispoJust N of Spooners Cove, Montana de Oro State Park. Montana de Oro State Park.
    CDA0018861CDAXanthium spinosumMarionPDR 11993261999-5-03 SolanoGates Canon, Gates Canon Rd. Vacaville. Sacramento Valley.
    CDA0019787CDAXanthium spinosumKleisPDR P0825202001-9-10 ShastaOn Clover St. in Redding. Northern California.
    CDA0029559CDAXanthium spinosumMichael O'Briens.n.2009-2-1 Los AngelesLa Piedra State Beach.
    CDA0034317CDAXanthium spinosumT.K. Palmer79-111979-7-03 StanislausRoberts Fery Rd.
    CDA0034377CDAXanthium spinosumC. Takahashis.n.1990-9-1 Santa ClaraNo other data.
    CDA0037850CDAXanthium spinosumMichael Pitcairns.n.2012-7-11 LassenSusanville; Wood Ranch.
    CDA0042848CDAXanthium spinosumL. Ahart176192011-7-30 ButteGarden area, Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles (air) south of Oroville.
    CDA0043137CDAXanthium spinosumDavid J. Keil226811991-10-26 Santa BarbaraVandenberg Air Force Base, North Base. Barka Slough, near eastern boundary of base along San Antonio Creek.
    CDA0048664CDAXanthium spinosumPotier, Zarate, VigilPDR# 360P065789382017-7-13 San Bernardino10403 Riverside Dr, Ontario 91761. 36- San Bernardino; 70-Regulatory Nursery Inspection; 2 Nursery Stock, Container Grown; NREG-Nursery regulatory
    CHSC108315CHSCXanthium spinosumLowell Ahart176192011-7-30 ButteGarden area, Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles (air) south of Oroville. T1 N R04E S04 SE1/4
    CHSC10962CHSCXanthium spinosumNick Santamaria801969-8-05 LassenAlongside road 14.14 southeast of Murrer's Upper Meadow.
    CHSC112246CHSCXanthium spinosumLowell Ahart186552013-4-29 ButteIn corral at the barn, about 1/4 mile north of the Honcut Cemetary, about 3 1/4 miles (air) northeast of Honcut. T1 N R04E S1 W1/4
    CHSC112728CHSCXanthium spinosumLowell Ahart191842013-10-22 GlennNear an old homestead, strand of Stony Gorge Reservoir, about two miles south of the dam, about 17 miles (air) northwest of Willows. T2 N R0 W S27 W1/2
    CHSC118447CHSCXanthium spinosumJulie Kierstead Nelson2014-0902014-10-15 TrinityIndian Valley Ranch; distrubed barnyard near Indian Valley Creek. UTM NAD 83 Zone 10, 507195n E, 45001 N.
    CHSC31575CHSCXanthium spinosumL. Ahart11961976-9-19 ButtePeter Ahart Ranch, Honcut.
    CHSC33054CHSCXanthium spinosumJames P. Smith47991971-9-18 SiskiyouState 3 between Callahan and Etna at the turnoff to the Proctor Ranch. Roadside.
    CHSC37080CHSCXanthium spinosumL. Ahart38511982-10-11 ButteFire guard, n of the check-in station, Graylodge Wildlife Refuge, ca. 12 mi sw of Gridley.
    CHSC432CHSCXanthium spinosumD. Bower1953-7-23 Butte3A Llano Seco. Marsh.
    CHSC43638CHSCXanthium spinosumVernon Oswald19341985-9-01 ButteSewer Treatment Plant on Chico River Rd. ca. 4 mi w of Chico. Top of a levee. T2 N R01E S07 NE1/4 of NW1/4
    CHSC45779CHSCXanthium spinosumVernon Oswald31511987-7-23 ButtePortion of Rancho Basquejo. Feenstra's Riverview Orchard located at the w end of Cana Rd. between the s half of Cana Lake (Dicus Slough) and the Sacramento River. In and along the edge of a bean field. T2 N R0 W S
    CHSC62042CHSCXanthium spinosumL. P. Janeway46121993-10-05 Los AngelesPuente Hills; ridgetop between the heads of Arroyo San Miguel and Arroyo Pescadero. Edge of dirt road down the ridgetop. T02S R1 W S25 SE1/4 NE1/4 USGS Quadrangle: La Habra 1:24,000
    CHSC66000CHSCXanthium spinosumVernon H. Oswald74561996-4-27 MercedSan Joaquin Valley. Arena Plains National Wildlife Refuge. U.S. Fish and Wildlife Service parcel located ca. 13 W of Merced. On dunes. T08S R12E S07 SE1/4 NW1/4
    CHSC71690CHSCXanthium spinosumVernon H. Oswald95571998-8-30 ShastaDirt road heading north of McArthur to the boat ramp on Big Lake. Roadside. T3 N R05E S29 SE1/4
    CHSC80347CHSCXanthium spinosumCaroline Warren1998-6-11 ColusaVicinity of Funks Creek and Logan Ridge. T1 N R0 W S USGS Quadrangle: Sites 1:24,000
    CHSC84340CHSCXanthium spinosumLowell Ahart105652003-9-12 SutterOn the north side of Pass Road, near the deep wash, 150 yards east of the gas pumps, Sutter Buttes, about 7 miles northwest of Sutter. T1 N R01E S3 W1/4
    CHSC89720CHSCXanthium spinosumR. Fischer3532004-8-12 ShastaAhjumawi Lava Springs State Park, 3 miles n. of McArthur, on western edge Modoc Plateau. Along rd. between McArthur and Rat Farm. Old McArthur Swamp. USGS Quadrangle: Fall River Mills 1:24,000
    CHSC92453CHSCXanthium spinosumLowell Ahart124612005-10-16 ButtePeter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. T1 N R04E S09 NE1/4
    CHSC95215CHSCXanthium spinosumR. D. Fischer8152004-9-14 ButteChico. Sierra Nevada foothills within upper Bidwell Park in Chico. USGS Quadrangle: Paradise West 1:24,000
    CHSC97444CHSCXanthium spinosumLowell Ahart138462007-5-14 YubaDry red bare soil, east of the dirt road, 20 yards northeast of the gate, about 20 yards south of the power tower, about 30 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville. T1 N R04E S2 W1/4
    CLARK-A1528-2146CLARKXanthium spinosumJohn C. Roos1965-7-21 San BernardinoLoma Linda
    CLARK-A1528-310CLARKXanthium spinosumJohn C. Roos52471951-9-24 San BernardinoLoma Linda
    CLARK-A1528-921CLARKXanthium spinosumPatricia A. Andrews59061975-6-26 OrangeCapistrano Bay Beach
    DAV162834DAVXanthium spinosumCarol W. Witham9762003-8-8 YoloDFG Tule Ranch vernal pools. Approximately 8 miles southeast of Davis. Southeast of the junctions of County Roads 38 and 105.
    DAV32895DAVXanthium spinosumErnest C. Twisselmann79381962-10-21 San Luis ObispoSan Luis Obispo County: Dorothy Twisselmann Ranch, western part of county.
    DAV348799DAVXanthium spinosumA. Solomeshchs.n.2004-10-2 NapaSouth end of Lake Berryessa; Spanish Flat
    DAV348803DAVXanthium spinosumFrederica Bowcutt19651994-10-31 MendocinoMendocino Co.: Sinkyone Wilderness State Park. 80 air miles south of Eureka, 20 air miles south of Garberville, 10 air miles west of Leggett. Along Usal Road just south of bridge over Usal Creek.
    DAV348804DAVXanthium spinosumA. S. Crafts4781926-7-08 YoloYolo County: University Farm Campus, Davis.
    DAV348805DAVXanthium spinosumRobert A. Norris47921984-7-27 MarinMarin County: near base of Bon Tempe Dam and upper reaches of Alpine Lake.
    DAV348806DAVXanthium spinosumC. H. Lamoureux13231959-5-28 SolanoSolano County: east shoulder of Chadbourne Road (this road 0.9 mile west of Fairfield stop light), around 100 yards south of junction with U.S. Highway 40.
    DAV348807DAVXanthium spinosumMalcolm A. Nobs1411948-7-15 MercedMerced County: Big Water Club, east of Gustine.
    DAV348808DAVXanthium spinosumA. G. O'Berg, Jr.81955-10-01 FresnoFresno County: 2.1 miles south of San Joaquin.
    DAV348809DAVXanthium spinosumGordon Pilone711960-10-03 Los AngelesLos Angeles County: Mills and Baseline in Claremont. San Gabriel Mountain Range.
    DAV348810DAVXanthium spinosumLowell Ahart176192011-7-30 ButteButte County: Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles (air) south of Oroville.
    DAV348811DAVXanthium spinosumD. S. Park2992011-5-21 Santa BarbaraSanta Barbara County: Lompoc. Al Toasty's ranch. Private property off of Cebada Canon Rd. Growing inside/around corrals. Abundant.
    DAV348812DAVXanthium spinosumEllen Dean26892005-6-25 SacramentoSacramento County: Deer Creek Hills Reserve. South of Latrobe Road, due south of Corral Gate and south of fence line.
    DAV348813DAVXanthium spinosumH. R. Drevers.n.1945-8-24 ColusaColusa County: Near Grimes.
    DAV348814DAVXanthium spinosumDavid Dunns.n.1940-9-26 Los AngelesLos Angeles County: north of the UCLA Botany Garden.
    DAV348815DAVXanthium spinosumMorris Halperins.n.1931-6-25 YoloYolo County: Davis; C St. between 1st and 2nd.
    DAV348816DAVXanthium spinosumA. A. Heller126551916-9-09 ButteButte County: near Durham.
    DAV348817DAVXanthium spinosumErnest C. Twisselmann60151960-10-12 San Luis ObispoSan Luis Obispo County: Summit of Palo Prieta Canon.
    DAV348818DAVXanthium spinosumErnest C. Twisselmann97141964-7-17 KernKern County: Sycamore Creek, 0.5 mile east of Arvin. East side of county.
    DAV348819DAVXanthium spinosumHenry Washburns.n.1924-9-28 Santa CruzSanta Cruz County: Santa Cruz.
    DAV348820DAVXanthium spinosumL.W. Winter7411927-10-02 Santa ClaraSanta Clara County: Milpitas.
    DAV348821DAVXanthium spinosumHenry M. Pollards. n.1957-9-21 Santa BarbaraSanta Barbara Cunty: Sandyland. Near Carpinteria.
    DAV348822DAVXanthium spinosumBob Rodin2981943-7-30 AlamedaAlameda County: Strawberry Canon, University of California Campus, Berkeley. On southern slope near cyclotron.
    DAV348823DAVXanthium spinosumJames P. Smith47991971-9-18 SiskiyouSiskiyou County: State 3 between Callahan and Etna at turnoff to the Proctor Ranch.
    ELH02398ELHXanthium spinosumGary Schoolcraft9041982-8-25 LassenAlong Ramhorn Spring Road
    GMDRC10772GMDRCXanthium spinosumJ. M. Andre396662017-10-1 San BernardinoNew York Mountains: east side of range, 0.4 WNW of Lecyr Well, 0.9 mi. W of junction Ivanpah Rd, among granitic boulders
    GMDRC3533GMDRCXanthium spinosumJ. Andre107752009-6-27 San BernardinoNew York Mountains: New York Mountains: Mojave National Preserve, east side of NY Mtns at Lecyr Well, approx 0.6 mi. E of mouth of Keystone Canon, 0.2 W. of Ivanpah Road. USGS 7.5 min. Quad: Castle Peaks 35 ° 16.7 N 115 ° 15.182' W. Elev. 4925 ft.
    HREC977HRECXanthium spinosumH. F. Heady4421952-8-25 MendocinoVassar Pasture - Hopland Field Station
    HREC978HRECXanthium spinosumA. H. M.HF 1311955-8-16 MendocinoHeadquarters Barn Area
    HSC100161HSCXanthium spinosumJ.P. Smith13,3762011-8-14 LassenSandy roadside
    HSC26899HSCXanthium spinosumJ.P. Smith47991971-9-18 SiskiyouHwy. 3 between Callahan and Etna at the turnoff to the Proctor Ranch.
    HSC6339HSCXanthium spinosumD.E. Anderson2332b1962-8-06 Lassen
    HSC6340HSCXanthium spinosumC.E. Fellows1331965-9-06 Los Angeles3/10 W of Las Virgenes Rd. on Mullholland Rd., SW side.
    HSC65550HSCXanthium spinosumThomas Wood1991979-8-08 Modoc1 mi. S of Ft. Bidwell, along Hwy. 1, corner house where road turns W
    HSC93301HSCXanthium spinosumF. Bowcutt19651994-10-31 Mendocino80 air mi. S of Eureka, 20 air mi. S of Garberville, 10 air mi. W of Leggett, along Usal Rd., just S of bridge over Usal Creek.
    HSC95420HSCXanthium spinosumL. Ahart105652003-9-12 SutterN side of Pass Rd., near the deep wash, 150 yds. E of the gas pumps, Sutter Buttes, about 7 W of Sutter.
    IRVC105739IRVCXanthium spinosumG.K. Helmkamp; E.A. Helmkamp87822004-8-14 San Luis Obispojunction of Thompson Rd. and Mehlschau Rd., NE of Nipomo
    IRVC105740IRVCXanthium spinosumG. A. Marsh61965-7-31 Los AngelesCatalina Island, Fisherman Cove
    IRVC105741IRVCXanthium spinosumG. A. Marsh61965-7-31 Los AngelesCatalina Island, Fisherman Cove
    IRVC105742IRVCXanthium spinosumA.C. Sanders; Mark Elvin, Cathleen Weigand254722002-7-30 Los AngelesNewhall Ranch, mouth of Potrero Canon just above gate at edge of Santa Clara River Valley
    IRVC108895IRVCXanthium spinosumP. Rundel14791964-9-10 San MateoSan Francisquito Creek.
    IRVC113538IRVCXanthium spinosumMichael G. Simpson46602020-7-13 OrangeForster Canon Trail system, Flagpole Hill trail, ca. 500 meters west of junction with Via Cerro Rebal trail, ca. 500 meters east of flag at Patriots Hill. Edge of road/trail.
    JEPS100163UCJEPSXanthium spinosumA. LangstonAL782003-7-28 Contra CostaMt. Wanda; Martinez; John Muir National Historic Site; Mt. Wanda, John Muir National Historic Site
    JEPS104112UCJEPSXanthium spinosumLowell Ahart105652003-9-12 SutterOn the n side of Pass Rd, near the deep wash, 150 yd e of the gas pumps, Sutter Buttes, ca 7 mi nw of Sutter.
    JEPS108130UCJEPSXanthium spinosumLowell Ahart124612005-10-16 ButtePeter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville
    JEPS111649UCJEPSXanthium spinosumA. G. Murdock1812003-9-12 SolanoMare Island On road near munitions storage buildings on edge of salt marsh
    JEPS118311UCJEPSXanthium spinosumLowell Ahart176192011-7-30 ButteGarden area, Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles (air) south of Oroville
    JEPS22449UCJEPSXanthium spinosumDouglas Warnock91481951-5-13 Mercedone mi e hiway 33 (3 mi n of Dos Palos, weedy area at edge of garden)
    JEPS30350UCJEPSXanthium spinosumDouglas Warnock91481951-5-13 Mercedone mi e Hiway 33 (three mi n of Dos Palos, weedy area at edge of garden)
    JEPS30637UCJEPSXanthium spinosumPeter H. Raven, Henry J. Thompson145191959-9-27 VenturaTriunfo Corner Santa Monica Mountains
    JEPS30875UCJEPSXanthium spinosumJohn H. Thomas24611950-10-01 Santa Cruzabout 1 mi inland from coast (8.5 mi nw of Davenport); Rancho del Oso
    JEPS36083UCJEPSXanthium spinosumErnest C. Twisselmann97141964-7-17 Kern0.5 mi e Arvin (Kern County e side); San Joaquin Valley, Sycamore Creek
    JEPS36194UCJEPSXanthium spinosumErnest C. Twisselmann97541964-7-17 KernBear Trap Road at Lake Road Gate (mouth of Bear Trap Canon); Tehachapi Mountains, Tejon Ranch
    JEPS37539UCJEPSXanthium spinosumL. M. Booth12401932-7-01 OrangeAnaheim Creek
    JEPS37540UCJEPSXanthium spinosumWillis L. Jepson102271923-10-10 SolanoGooyear station Suisun Marshes
    JEPS37543UCJEPSXanthium spinosumElizabeth Day Palmer1908-7-17 Los AngelesLos Angeles
    JEPS41256UCJEPSXanthium spinosumR. F. Hoover1801934-10-20 StanislausCarpenter Road near San Joaquin R. (15 mi s of Modesto)
    JEPS41262UCJEPSXanthium spinosumWillis L. Jepson1896-3-11 AlamedaClaremont
    JEPS41268UCJEPSXanthium spinosumGeo. D. Butler5041908-7-21 Siskiyounear Yreka (in barnyard); Butler's Ranch
    JEPS45179UCJEPSXanthium spinosumPerry Allen1961-9-21 Stanislausvicinity La Grange
    JEPS8430UCJEPSXanthium spinosumV. F. Hesse14321954-11-18 Santa Cruzbottom of lake near Freedom; College Lake (drained)
    LA00638664LAXanthium spinosumLouis C. Wheeler14231932-10-07 Los AngelesSanta Monica Mountains; Westwood; University of California, Los Angeles Campus
    LA213087LAXanthium spinosumLee Hainess.n.1955-10-07 Los AngelesPierce Junior College
    LA31642LAXanthium spinosumPeter H. Raven145191959-9-27 VenturaSanta Monica Mountains; Russell Valley; Triunfo Corner
    LOB118458LOBXanthium spinosumAnne Mowers.n.1966-7-09 Los AngelesSanta Catalina Island. Big Fisherman Cove.
    LOB118460LOBXanthium spinosumMc.Fadden1291959-5-27 Unknown
    LOB118461LOBXanthium spinosumJ.T McNays.n.1976-10-23 Santa BarbaraJct. of St.1 & St. 135
    OBI119791OBIXanthium spinosumDavid Keil324672014-9-3 San Luis ObispoOutskirts of Shandon on Trusedale Rd.
    OBI121972OBIXanthium spinosumGeorge Butterworth10422018-10-18 San Luis ObispoSanta Margarita; East end of town, between El Camino Real and RR tracks
    OBI121973OBIXanthium spinosumDavid Keil233111992-5-28 San Luis ObispoLaguna Lake Park. Low areas near lake edge. Weed in low area of pasture near lake.
    OBI121974OBIXanthium spinosumDavid Keil336162016-3-14 San Luis ObispoSouthern foothills of San Luis Range. Wild Cherry Ranch west of Avila Beach.
    OBI121975OBIXanthium spinosumLee Griffin1947-7-03 San Luis ObispoCal Poly campus
    OBI121976OBIXanthium spinosumZachary McDermott32015-11-8 San Luis ObispoMorro Creek, next to CA 1 and Keiser Park
    OBI121977OBIXanthium spinosumDavid J. Keil226811991-10-26 Santa BarbaraVandenberg Air Force base, North base. Barka Slough, near eastern boundary of base along San Antonio Creek. Areas of freshwater marsh, riparian woodland, and salt-marsh meadow.; 34.771 -120.4674
    OBI121978OBIXanthium spinosumDavid J. Keil211131988-9-09 San Luis ObispoNorth of Cayucos. West of Highway 1 on Villa Creek Road at site of partially constructed abalone farm
    OBI121979OBIXanthium spinosumDavid J. Keil225791991-8-22 San Luis ObispoSan Simeon State Park and vicinity along San Simeon Creek from beach to about ___ miles inland and on adjoining slope to C.T. Ranch.
    OBI121980OBIXanthium spinosumHans Wilgenburg191977-8-11 San Luis ObispoCal Poly campus
    OBI121981OBIXanthium spinosumAustin P. Griffithss.n.1981-11-07 San Luis ObispoMontana de Oro State Park; just N of Spooners Cove
    OBI121982OBIXanthium spinosumDavid J. Keil118231976-9-18 San Luis Obispo0.7 N of Lopez Dr on Rte 227, N of Arroyo Grande
    OBI121983OBIXanthium spinosumDavid J. Keil142081980-9-17 San Luis ObispoCyn Ranch on Shell Crk rd 6 N of hwy 58. Plants coll from zone around small artificial reservoir
    OBI121984OBIXanthium spinosumDavid J. Keil147071981-5-16 San Luis ObispoArea around Arroyo de la Cruz near its crossing of hwy 1
    OBI121985OBIXanthium spinosumMelissa Luckow8871982-6-24 San Luis ObispoCambria, jctn of hwy 1 and rd to Black Mt. SE corner of rd. EIR vouchers
    OBI121986OBIXanthium spinosumJulie M. Vanderwiers.n.1979-8-17 San Luis ObispoIndian Knob Tar Sands
    OBI121987OBIXanthium spinosumSmeltzer2031982-7-28 San Luis ObispoAlong the N foot trl in Laguna Lake park
    OBI121988OBIXanthium spinosumDavid J. Keil179061983-8-30 San Luis ObispoBlack Lake Cyn, S of Arroyo Grande
    OBI121989OBIXanthium spinosumAllison Berry1411984-5-03 San Luis ObispoCamp San Luis Shooting Facility 6.5 N of San Luis Obispo on hwy 1. In man-made ravine at N end of old bunkers
    OBI121990OBIXanthium spinosumEric Wise18341983-10-16 San Luis ObispoGrant Lake. Bordering James Grant's property on Choice Valley rd about 1 mi S of Choice Valley school
    OBI121991OBIXanthium spinosumEric Wise17521983-8-30 San Luis ObispoAlong the length of Black Lake Cyn with San Luis Obispo Co. Planning Board Et al.
    OBI121992OBIXanthium spinosumEric Wise6901981-6-26 San Luis ObispoDrainage ditch at E entrance to Cambria Air Force Station 5.6 mi S of Cambria W of hwy 1
    OBI121993OBIXanthium spinosumJan Barber801993-8-14 San Luis ObispoSan Simeon State Park. Near seasonal outlet to ocean of San Simeon crk
    OBI121994OBIXanthium spinosumDavid J. Keil149651981-7-03 San Luis ObispoArroyo de la Cruz, N of San Simeon. Along N side of the stream from freshwater marsh W of hwy 1 E along the ridge system to lower slopes of Pine Top Mtn and back to the hwy along riparian zone
    OBI121995OBIXanthium spinosumJim Heaston181955-10-07 San Luis ObispoCal Poly SLO
    OBI121996OBIXanthium spinosumBetty Sheehan181957-10-11 San Luis ObispoCal Poly Campus, Science bldg
    OBI145489OBIXanthium spinosumDavid J. Keil214851990-9-28 Santa BarbaraSan Luis Obispo-Santa Barbara County line area west of Guadalupe. From west end of West Main Street eastward along channel of Santa Maria River.
    OBI161561OBIXanthium spinosumDavid Keil35736-12019-5-9 Santa BarbaraSanta Ynez Mountains. Phytojog 2019 trip to The Nature Conservancy's Jack and Laura Dangermond Preserve. Cojo Ranch side. Along Cojo Bay Rd. 3.68 miles S from Cojo Gate, at the cattle guard where Cojo Bay Rd becomes parallel with the train tracks.
    OBI181203OBIXanthium spinosumDavid J. Keil314552012-7-18 San Luis ObispoJust north of bridge over Santa Maria River on highway 1, north of Guadalupe
    PGM752PGMXanthium spinosumYadon, Vern1970-7-06 MontereyDiablo Range, Slack Cyn, Nr Jct with Big Sandy Rd in river bed
    POM11275RSAXanthium spinosumP. A. Munz46951921-10-15 Los AngelesClaremont.
    POM129166RSAXanthium spinosumW. J. Williamson2971919-7-01 TuolumneSpring Gulch near Bear Creek
    POM146125RSAXanthium spinosumE. E. Stanford581926-10-14 San JoaquinNear Stockton.
    POM155746RSAXanthium spinosumM. B. Dunkle20071928-10-07 Los AngelesMiddle Ranch Canon. Santa Catalina Island.
    POM171426RSAXanthium spinosumJohn Vosss.n.1930-9-02 Santa BarbaraSan Miguel Island. Canon at east end of island.
    POM201742RSAXanthium spinosumL. M. Booth12401932-7-01 OrangeAnaheim Marsh
    POM219528RSAXanthium spinosumH. F. Copeland5961923-7-09 ButteMud Creek Ranch
    POM263011RSAXanthium spinosumJ. C. Roos2361940-11-01 San BernardinoLoma Linda, San Bernardino Valley
    POM290162RSAXanthium spinosumArthur L. Cohen4051934-5-20 KernBakersfield. Kern River Watershed.
    POM290163RSAXanthium spinosumAnonymous18071897-8-1 Los AngelesLos Angeles River [?]
    POM290164RSAXanthium spinosumLyman Benson6241928-11-28 LakeWestern side of Mt Konocti, Middle N Coast mtn range, Clear Lake watershed.
    POM77735RSAXanthium spinosumE. C. Jaegers.n.1925-11-10 San DiegoCanon on desert-edge below Montezuma Valley.
    POM87802RSAXanthium spinosumL. R. Abramss.n.1897-10-1 Santa ClaraStanford University
    PPWD178PPWDXanthium spinosumG. de Nevers82311987-7-10 SonomaPepperwood Preserve - Murry Ranch; at NW border of Pepperwood; abundant in cow and pig pens.
    PUA1132PUAXanthium spinosumJohn Roos1938-9-01 NapaLocal landmark: Pacific Union College. St. Helena Quad.
    PUA57763PUAXanthium spinosumG.L. Clifton1983-7-28 HumboldtLocal landmark: Camp Grant. Weott Quad.
    RSA0016955RSAXanthium spinosumM. Van Valkenburghs.n.1934-10-27 Los AngelesTejon Pass
    RSA0023279RSAXanthium spinosumJustin M. Wood4019-A2011-5-9 VenturaSimi Valley: Arroyo Simi: East of State Route 23, south of the Metrolink Railroad Tracks, and south of the creek.; Simi Valley West
    RSA0042786RSAXanthium spinosumLee Hainess.n.1955-10-07 Los AngelesPierce Campus - Canoga Park.
    RSA0068372RSAXanthium spinosumNick Jensen25922014-9-29 KernTejon Ranch. Wet area in and around the stock pond north of Contour road, about 1 road km east of the National Cement Plant.
    RSA0070296RSAXanthium spinosumNick Jensen6042013-9-13 KernTejon Ranch. Lower Pescado Creek about 1.25 road km to the north of the junction with Contour Rd.
    RSA0082678RSAXanthium spinosumErnest C. Twisselmann97541964-7-17 KernBear Trap Road at lake Road gate (mouth of Bear Trap Canon).
    RSA0117842RSAXanthium spinosumSarah J. De Groot79492016-7-6 VenturaThe Nature Conservancy (TNC). The Nature Conservancy Loughman property; west of Santa Paula and south of Highway 126. Along the Santa Clara River north of South Mountain and South Mountain Road.; Santa Paula 7.5'
    RSA124630RSAXanthium spinosumAllan G. O'Berg, Jr.81955-10-01 Fresno2.1 mi S of San Joaquin on E side of Colorado Rd. on rice levee next to road at 200 ft.
    RSA12643RSAXanthium spinosumC. B. Wolf60561934-8-16 Los Angelespeat land on Bryant Ranch east of Long Beach. 700 ft. east of center of sect. 34; 950 ft. So. of No. line of Same.
    RSA126671RSAXanthium spinosumP. H. Raven145191959-9-27 VenturaTriunfo Corner
    RSA133869RSAXanthium spinosumJohn H. Thomas24611950-10-01 Santa CruzRancho del Oso, About 1 mile inland from coast. 8.5 W of Davenport.
    RSA160503RSAXanthium spinosumJ. D. Olmsted8341959-8-26 OrangeAlong road south of mouth of Black Star Canon north of Rock Crushing Plant.
    RSA17977RSAXanthium spinosumC. B. Wolf7011927-7-28 Merced11 mi. east of Los Banos. San Joaquin Valley.
    RSA187800RSAXanthium spinosumR. F. Thorne366581966-9-14 Los AngelesSanta Catalina Island: lower Middle Ranch Canon, ca. 3/4 mile above Ben Weston Beach
    RSA188037RSAXanthium spinosumR. F. Thorne362711966-4-29 Los AngelesSanta Catalina Island: above ranch in Middle Ranch Canon
    RSA210836RSAXanthium spinosumR. F. Thorne391141969-9-04 ModocN Fork of Pit River 3.4 N of Alturas where crossed by Highway 395.
    RSA212499RSAXanthium spinosumPaul F. Covel6491937-9-10 AlamedaOakland Hills.
    RSA234481RSAXanthium spinosumJames Henrickson50521970-7-25 Orange2 miles N. of Huntington Beach along dry NE margin of Bolsa Chica Salt Marsh
    RSA256368RSAXanthium spinosumRobert A. Norris21271974-7-28 MarinNear small canal and near Sir Francis Drake Hwy about 1 WSW Pt Reyes Station.
    RSA317484RSAXanthium spinosumRobert A. Norris47921984-7-27 MarinIn dry gully near base of Bon Tempe Dam and upper reachers of Alpine Lake. Area submersed in winter and/or spring.
    RSA332374RSAXanthium spinosumR. F. Thorne583371984-5-04 Santa BarbaraSanta Cruz Island. Stream bed behind Prisoner's Harbor Camp.
    RSA441169RSAXanthium spinosumF. R. FosbergS45471931-4-10 Los AngelesAvalon Valley, Santa Catalina Island.
    RSA441170RSAXanthium spinosumF. R. FosbergS53781931-7-11 Los AngelesMiddle Ranch Canon, Santa Catalina Island.
    RSA441171RSAXanthium spinosumBlanche Trask19311902-8-1 Los AngelesAvalon, Catalina Island.
    RSA441172RSAXanthium spinosumRobert Gustafson23431981-8-07 Los AngelesBallona Wetlands, Area 2, along Culver Blvd.
    RSA441173RSAXanthium spinosumL. C. Wheeler14231932-10-07 Los AngelesU. C. L. A. Campus, W Los Angeles.
    RSA441175RSAXanthium spinosumE. S. Spaldings.n.1923-6-25 Los AngelesEagle Rock.
    RSA441176RSAXanthium spinosumAnstruther Davidsons.n.1890-9-1 Los AngelesCienega, Los Angeles.
    RSA441177RSAXanthium spinosumF. R. Fosbergs30921930-7-03 Los AngelesSan Gabriel River, El Monte.
    RSA441178RSAXanthium spinosumM. B. Dunkle83641939-7-29 Santa BarbaraSan Miguel Island. Cuyler Harbor.
    RSA441179RSAXanthium spinosumM. B. Dunkle83641939-7-29 Santa BarbaraSan Miguel Island. Cuyler Harbor.
    RSA441180RSAXanthium spinosumWilliam C. Draper421927-10-06 Santa ClaraFound near Santa Clara.
    RSA441181RSAXanthium spinosumJosephine Meyerss.n.1932-9-1 VenturaBroome's Ranch, Coast Highway.
    RSA441182RSAXanthium spinosumP. A. Meyers10801973-9-03 VenturaAbandoned agricultural fields approximately one mile west of Port Hueneme Naval base and 1/4 to 1/2 mile inland from beach.
    RSA507535RSAXanthium spinosumL. C. Wheeler98671967-6-26 Los AngelesSan Gabriel Mountains : Elsmere Canon, near mouth.
    RSA507540RSAXanthium spinosumL. C. Wheeler104601967-8-13 Los AngelesReynier Canon off San Canon, Placerita Canon Road
    RSA512367RSAXanthium spinosumSteven A. Junak3601980-12-19 Santa BarbaraSanta Cruz Island. Prisoners'Harbor, on W side of mouth of Canada del Puerto.
    RSA515359RSAXanthium spinosumSteven A. Junak2961980-5-13 Santa BarbaraCentral Valley, along Valley Road at foot of Portezuela grade.
    RSA549939RSAXanthium spinosumSteven A. Junak20751990-10-17 Santa BarbaraSanta Cruz Island. W. side of lower Laguna Canon, ca. 0.25 N of beach, on N side of fifth small side canyon inland from beach.
    RSA550238RSAXanthium spinosumSteven A. Junak20531990-10-16 Santa BarbaraSanta Cruz Island. Mouth of Pozo Creek.
    RSA573469RSAXanthium spinosumTimothy S. Ross65911992-6-15 Los AngelesWhittier Hills: (local name for the western extremity of the Puente Hills): ridgetop near the head of Turnbull Canon.; Whittier 7.5' USGS
    RSA588207RSAXanthium spinosumSteven A. Junak28671991-9-14 Santa BarbaraSanta Cruz Island. Scorpion Canon, just inland from mouth.
    RSA588616RSAXanthium spinosumSteven A. Junak35311992-11-07 Santa BarbaraSanta Cruz Island. E end of man-made pond just SE of Cavern Point.
    RSA598348RSAXanthium spinosumL. C. Wheelers.n.1969-5-17 Los AngelesSanta Catalina Island. Catalina Harbor (Isthmus).
    RSA599921RSAXanthium spinosumE. R. BlakleyB-25671958-10-13 Santa BarbaraSanta Cruz Island. Prisoners Harbor
    RSA600757RSAXanthium spinosumL. C. Wheeler98671967-6-26 Los AngelesSan Gabriel Mountains : Elsmere Canon, near mouth.
    RSA607953RSAXanthium spinosumL. C. Wheeler44501936-9-08 MontereyPoint Lobos Reserve: Carmelo Meadow.
    RSA610674RSAXanthium spinosumR. N. PhilbrickB65-15181965-8-24 Santa BarbaraSan Miguel Island. South branch of Willow Canon, north of road to Cardwell Point
    RSA618540RSAXanthium spinosumA. C. Sanders223571998-11-22 KernSE Sierra Nevada Mtns: Jawbone Canon, north of Cross Mtn., near White Mtn. and conflience with Cottonwood Creek; Cross Mountain 7.5'
    RSA626596RSAXanthium spinosumSteven A. Junak29401991-10-11 Santa BarbaraSanta Cruz Island. Along road to Fraser Point, 0.1 mile N of corrals behind N end of Christy Beach.
    RSA638192RSAXanthium spinosumScott D. White71891998-10-15 OrangeYorba Linda: 1/2 mile south of Telegraph Cyn. Between Ohio St. and Fairmont. Proposed for development.; Yorba Linda
    RSA643270RSAXanthium spinosumR. D. Goedens.n.1965-9-28 Santa BarbaraSanta Cruz Island. Mouth of Canon) at the ocean.; Santa Cruz Island B
    RSA643351RSAXanthium spinosumR. D. Goedens.n.1978-9-21 VenturaVentura: Main Street, west of the Ventura River.; Ventura 7.5
    RSA653487RSAXanthium spinosumA. C. Sanders220901998-7-02 VenturaMoorpark: hills S of Tierra Rejada Valley, along Read Rd. ca. 1/2 mile E of Moorpark Rd., just W of Hwy 23, ca. 1 mile NW of Wood Ranch Reservoir, ca. 2 NE of Thousand Oaks.; Thousand Oaks 7.5' Q.
    RSA699678RSAXanthium spinosumKeith E. Hoffmasters.n.1927-6-30 San DiegoSan Onofre
    RSA714664RSAXanthium spinosumA. C. Sanders267812003-5-21 RiversideElsinore Valley: Wildomar, old ranch parcel SE of Wesley St. and SW of Laguna Rd., west of Orange St., NE of Palomar St.; Wildomar 7.5
    RSA735545RSAXanthium spinosumA. C. Sanders354752008-6-17 OrangeLomas de Santiago, East Loma Ridge Spur Road near Hicks Cyn. Haul Rd.; El Toro 7.5' Q.
    RSA749525RSAXanthium spinosumGeorge K. Helmkamp142072008-10-6 Yubajunction of CA-65 and Ostrom No. 3 Road, southeast of Olivehurst; Olivehurst 7.5' Q.
    RSA781949RSAXanthium spinosumGeorge K. Helmkamp156922009-10-20 El DoradoSand Ridge Road 0.9 mile east of CA-49, at the junction with Morales Ranch Road, 6.8 air mi. SSW (188 deg,) of Diamond Springs; Fiddletown 7.5' Q.
    RSA795263RSAXanthium spinosumL. Ahart176192011-7-30 ButteGarden area, Peter Ahart Ranch, about 1.5 miles north and 1 mile east of Honcut, about 12 air miles south of Oroville.
    RSA93917RSAXanthium spinosumF. W. Peirson13211920-8-01 Ventura6 miles west of Ventura
    RSA969RSAXanthium spinosumJ. T. Howell1731927-6-20 OrangeBotany Garden, Rancho Santa Ana.
    SBBG101160SBBGXanthium spinosumF. L. Johnson, N. A. McCartyROB7171993-10-14 San Luis ObispoCamp San Luis Obispo; Chorro Crk in cantonment area; Camp San Luis Obispo
    SBBG101493SBBGXanthium spinosumSteven A. JunakSC 28671991-9-14 Santa BarbaraSanta Cruz Island: Scorpion Cyn, just inland from mouth
    SBBG101566SBBGXanthium spinosumSteven A. JunakSC 29401991-10-11 Santa BarbaraSanta Cruz Island: rd to Fraser Pt, 0.1 N of corrals behind N end of Christi beach
    SBBG102219SBBGXanthium spinosumM. DailySR1491979-5-04 Santa BarbaraSanta Rosa Island: N side of rd W of Torrey pine area
    SBBG105853SBBGXanthium spinosumSteven A. JunakSC 35081992-10-04 Santa BarbaraSanta Cruz Island: N of Near Pt
    SBBG111173SBBGXanthium spinosumE. Neese, E. PainterHL22231995-10-25 MontereyFort Hunter Liggett: ca. 1.5 N of Sulphur Springs Rd, ca. 2.2 W of Jolon Rd, ca. 2.8 km W of Jolon Crk; Ft Hunter Liggett
    SBBG114598SBBGXanthium spinosumR. Burgess50232001-11-22 VenturaLos Padres National Forest: Middle Matilija Crk, NE of Old Man Cyn
    SBBG116069SBBGXanthium spinosumR. Burgess40952000-8-11 VenturaVentura River mouth, between Southern Pacific Railroad Bridge and US 101
    SBBG121062SBBGXanthium spinosumR. Burgess, P. Munro, T. Austin49132001-8-17 VenturaLos Padres National Forest; stock ponds S of White Ledge Peak, Superior Ridge fire break
    SBBG12839SBBGXanthium spinosumE. R. Blakley47511961-9-23 Los AngelesSanta Catalina Island: beach bluff between Isthmus Harbor and Fisherman's Cove
    SBBG12872SBBGXanthium spinosumE. R. Blakley53701962-10-03 Los AngelesSanta Catalina Island: banks around Wrigley Reservoir at the summit of the island rd
    SBBG129172SBBGXanthium spinosumA. Sawdo, E. Edinger1988-5-06 Santa BarbaraSanta Rosa Island: Old Ranch Cyn, near Plot 82
    SBBG130141SBBGXanthium spinosumSteven A. Junak, D. Wilken, K. McEachernSC 42111995-10-04 Santa BarbaraSanta Cruz Island: Lagunitas Rd
    SBBG130142SBBGXanthium spinosumSteven A. Junak, D. Wilken, K. McEachernSC 42121995-10-04 Santa BarbaraSanta Cruz Island: valley rd, Canada de la Puertezuelo
    SBBG138942SBBGXanthium spinosumR. Burgess87072010-7-23 VenturaN side of base along Arnold Rd, Point Mugu Naval Base.
    SBBG139999SBBGXanthium spinosumSteven A. JunakSC-41811995-7-31 Santa BarbaraSanta Cruz Island: Main stream channel just W of field station, Central Valley (just W of bypass road).
    SBBG144434SBBGXanthium spinosumR. Burgess108822018-5-31 VenturaEastern Ventura city, Walker-Herne Ranch, N of terminus of Kimball Rd., city of Ventura
    SBBG16126SBBGXanthium spinosumErnest C. Twisselmann79381962-10-21 San Luis ObispoDorothy Twisselmann Ranch
    SBBG27718SBBGXanthium spinosumMichael R. Benedict1965-12-07 Los AngelesSanta Catalina Island: beach 0.25 W of Arrow Pt
    SBBG28362SBBGXanthium spinosumR. N. PhilbrickB66-162b1966-5-03 Santa BarbaraSanta Cruz Island: beach at mouth of Laguna Cyn
    SBBG28389SBBGXanthium spinosumR. N. PhilbrickB67-1341967-4-16 Santa BarbaraSanta Cruz Island: upper Sierra Blanca Pk
    SBBG29723SBBGXanthium spinosumR. N. Philbrick w/ M. R. BenedictB65-13931965-6-13 Santa BarbaraSanta Cruz Island: beach at mouth of Posa Cyn
    SBBG31143SBBGXanthium spinosumR. F. Thorne362711966-4-29 Los AngelesSanta Catalina Island: near temporary pool above ranch in Middle Ranch Cyn
    SBBG32144SBBGXanthium spinosumR. N. Philbrick w/ R. F. ThorneB67-2031967-5-18 Los AngelesSanta Catalina Island: Middle Bulrush Cyn, Salta Verde
    SBBG36564SBBGXanthium spinosumClifton F. Smith361945-9-03 Santa BarbaraTunnel Rd, Mission Cyn
    SBBG36565SBBGXanthium spinosumH. and M. Dearing50031940-11-03 Venturanear Foster Park
    SBBG38970SBBGXanthium spinosumHenry M. Pollard1962-9-19 Venturanear Ventura River bridge at Foster Park
    SBBG39845SBBGXanthium spinosumE. R. Blakley, E. K. Balls25671958-10-13 Santa BarbaraSanta Cruz Island: Prisoners Harbor
    SBBG42245SBBGXanthium spinosumM. B. Dunkle83641939-7-29 Santa BarbaraSan Miguel Island: Cuyler Harbor
    SBBG46587SBBGXanthium spinosumHenry M. Pollard1972-6-20 Venturabehind Taylor Ranch bluffs immediately above ranch entrance, US Hwy 101, ca. 0.5 W of Ventura River
    SBBG47775SBBGXanthium spinosumP. A. MeyersDM-10801973-9-03 Venturaca. 1 W of Port Hueneme Naval Base and 0.25 to 0.5 mi inland from beach
    SBBG48428SBBGXanthium spinosumL. S. MatlovskyDM8837-371974-5-17 Santa BarbaraSanta Ynez Mtns: Las Flores Cyn, ca. 16 W of Goleta
    SBBG51710SBBGXanthium spinosumR. N. PhilbrickB65-15181965-8-24 Santa BarbaraSan Miguel Island: S branch of Willow Cyn, N of rd to Cardwell Pt
    SBBG52608SBBGXanthium spinosumR. Zembal1977-6-04 VenturaPacific Missile Test Center: just above tidal debris on marsh side of E barrier beach, half way between ocean inlet and E boundary of the base
    SBBG52934SBBGXanthium spinosumS. A. JunakSR 1261978-5-12 Santa BarbaraSanta Rosa Island: 100 NE of windmill, Windmill Cyn
    SBBG54914SBBGXanthium spinosumSteven A. Junak w/ M. C. HochbergSC 4441981-9-09 Santa BarbaraSanta Cruz Island: S end of Christi beach
    SBBG61636SBBGXanthium spinosumHenry M. Pollard1942-10-27 VenturaVentura River, near river mouth; Ventura
    SBBG61637SBBGXanthium spinosumRalph Hoffmann1927-8-30 Los Angelesnear Castaic
    SBBG79771SBBGXanthium spinosumRalph Hoffmann1930-6-11 Santa BarbaraSan Miguel Island
    SBBG81320SBBGXanthium spinosumSteven A. Junak1978-10-13 Santa BarbaraSan Miguel Island: W portion of San Miguel Island
    SBBG86413SBBGXanthium spinosumClifton F. Smith1931943-10-02 Santa BarbaraMission Cyn Rd, below Dr. Richter's above Botanic Garden
    SBBG86414SBBGXanthium spinosumClifton F. Smith361943-9-03 Santa BarbaraSanta Ynez Mtns: N end of Cheltenham Rd, above Tunnel Rd, Mission Cyn
    SBBG86415SBBGXanthium spinosumClifton F. Smith2331943-10-09 Santa BarbaraMission Cyn Rd, below Dr. Richter's above Botanic Garden
    SBBG89922SBBGXanthium spinosumSteven A. Junak w/ M. C. HochbergSC 3601980-12-19 Santa BarbaraSanta Cruz Island: Prisoners Harbor, on W side of mouth of Canada del Puerto
    SBBG91300SBBGXanthium spinosumSteven A. Junak w/ M. C. HochbergSC 2961980-5-13 Santa BarbaraSanta Cruz Island: Valley Rd at foot of Portezuela grade
    SBBG95452SBBGXanthium spinosumM. B. Dunkle20071928-10-07 Los AngelesSanta Catalina Island: Middle Ranch Cyn
    SBBG98356SBBGXanthium spinosumSteven A. JunakSC 20751990-10-17 Santa BarbaraSanta Cruz Island: W side of lower Laguna Cyn, ca. 0.25 mi from beach, on N side of fifth small side cyn inland from beach
    SBBG98371SBBGXanthium spinosumSteven A. JunakSC 20531990-10-16 Santa BarbaraSanta Cruz Island: mouth of Pozo Crk
    SBBG98374SBBGXanthium spinosumSteven A. JunakSC 20561990-10-16 Santa BarbaraSanta Cruz Island: Playa Larga, in small cyn just E of mouth of Johnson Cyn
    SD00017493SDXanthium spinosumBarbara Booth6532017-6-17 San DiegoOak Grove Valley; and 0.10 east of Highway 79 South proceeding south to property boundary fence; around west side of evaporating pond just south of Chihuahua Creek
    SD113180SDXanthium spinosumDarley F. Howe7151938-8-07 San DiegoNear Poway on highway
    SD12175SDXanthium spinosumFrank F. Gander245-201935-9-20 San DiegoMurphy Canon
    SD135450SDXanthium spinosumSteven A. JunakSC-20531990-10-16 Santa BarbaraSanta Cruz Island: Mouth of Pozo Creek
    SD143557SDXanthium spinosumR. D. Goedens.n.1965-9-28 Santa BarbaraSanta Cruz Island: mouth of Canada de Laguna at the ocean.
    SD194295SDXanthium spinosumSteven A. JunakSC-35081992-10-04 Santa BarbaraSanta Cruz Island, southwest corner of island, north of Near Point.
    SD196329SDXanthium spinosumPhillip Roullard1582007-8-4 San DiegoSan Diego, Borderfield State Park, « mi S of westernmost end of Monument Road, just N of US / Mexico border, near beach
    SD197701SDXanthium spinosumG.K. Helmkamp142902008-10-30 SacramentoSouthern Sacramento Valley: along Highway E13 (Twin Cities Road) 4.4 miles west of its junction with CA-99.
    SD21967SDXanthium spinosumCatharine M. Woods.n.1927-4-17 San DiegoSan Pasqual
    SD236227SDXanthium spinosumG.K. Helmkamp142072008-10-6 YubaSacramento Valley: junction of CA-65 and Ostrom No. 3 Road, southeast of Olivehurst (Olivehurst 7.5'Q)
    SD240910SDXanthium spinosumGeorge K. Helmkamp184962011-11-28 SutterSacramento Valley: Sacramento Ave., 0.2 miles from its junction with CA-99, 0.75 mile NW of Nicolaus, beside the levee of the Feather River (Nicolaus 7.5'Q)
    SD256002SDXanthium spinosumBarbara Booth6192012-7-22 San DiegoOak Grove Valley; agricultural pastures just east of Highway 79; 0.46 mile SSE of intersection with Chihuahua Valley Road; just north of U.S. Forest Service Oak Grove Campground.
    SD25804SDXanthium spinosumFrank F. Gander77231939-9-14 San DiegoSpring Valley
    SD28186SDXanthium spinosumFrank F. Gander88181940-9-25 San DiegoSanta Margarita Ranch near mouth of Santa Margarita River
    SD30832SDXanthium spinosumEdith A. Purer54071933-8-13 San MateoSanta Clara Valley, Baden Station
    SDSU19351SDSUXanthium spinosumRoullard, Phillip1582007-8-4 San DiegoSan Diego, Borderfield State Park, 1/2 mi S of westernmost end of Monument Road, just N of US / Mexico border, near beach
    SFV103358SFVXanthium spinosumP. M. Schiffmans. n.1996-10-27 KernVentura Mountains; San Emigdio Mountains. In creek bed in San Emigdio Canon.
    UC1070514UCJEPSXanthium spinosumA. Simontacchi6831938-12-10 Monterey3.4 mi nw Welby; King City Quadrangle
    UC1070515UCJEPSXanthium spinosumB. Bolt5201935-11-07 Calaveras1 1/2 mi n Canon Flat; Jackson Quadrangle
    UC1070516UCJEPSXanthium spinosumH. S. Yates59431936-7-26 Alameda2 mi w San Leandro; Haywards Quadrangle
    UC1070517UCJEPSXanthium spinosumB. Bolt5401936-1-14 San Luis Obispo3/8 mi ne Islay Creek (mouth); Cayucos Quadrangle
    UC1192252UCJEPSXanthium spinosumMalcolm A. Nobs, S. Galen Smith1411948-7-15 Mercede Gustine (along dike); Big Water Club
    UC1211078UCJEPSXanthium spinosumHuron H. Smith51681912-7-02 Los AngelesAvalon Santa Catalina Island
    UC1223296UCJEPSXanthium spinosumJoseph P. Tracy174521943-11-28 Humboldtriver bar at mouth Van Duzen River (near Alton); Eel River
    UC1294190UCJEPSXanthium spinosumE. K. Balls, E. R. Blakley236851958-10-13 Santa BarbaraPrisoner's Harbor Santa Cruz Island
    UC129775UCJEPSXanthium spinosumMiss Harriet A. Walker4791906-7-01 AlamedaWest Berkeley
    UC149138UCJEPSXanthium spinosumLeRoy Abrams41811904-9-02 Los Angeleswaste places Los Angeles
    UC1614373UCJEPSXanthium spinosumCharles M. Belshaw2121934-10-06 Alamedaby cattle yard at Poultry Farm Station Strawberry Canon (Berkeley); , Strawberry Canon
    UC163874UCJEPSXanthium spinosumGeo. D. Butler9911908-9-07 Siskiyoubarnyard near Yreka
    UC1951984UCJEPSXanthium spinosumSteven A. JunakSC-20531990-10-16 Santa BarbaraSanta Cruz Island. Mouth of Pozo Creek.
    UC2044828UCJEPSXanthium spinosumNick Jensen, Ed Kentner25922014-9-29 KernTejon Ranch. Wet area in and around the stock pond north of Contour road, about 1 road km east of the National Cement Plant.
    UC2045000UCJEPSXanthium spinosumNick Jensen, Tommy Stoughton, Evan Myer, Manuel Lujan6042013-9-13 KernTejon Ranch. Lower Pescado Creek about 1.25 road km to the north of the junction with Contour Road.
    UC2073320UCJEPSXanthium spinosumSteven A. JunakSC-42121995-10-04 Santa BarbaraSanta Cruz Island. Valley Road, Canada de la Portezuela.
    UC36805UCJEPSXanthium spinosumJ. Burtt Davy70601900-7-28 Santa ClaraBerryessa
    UC36806UCJEPSXanthium spinosumIvar Tidestrom1893-11-14 AlamedaHaywards
    UC36807UCJEPSXanthium spinosumJ. Burtt Davy42771898-5-01 Colusanear Willows
    UC36808UCJEPSXanthium spinosumWillis L. Jepson1891-9-01 SolanoVacaville
    UC36811UCJEPSXanthium spinosumJ. Burtt Davy1731893-5-05 San FranciscoSan Francisco
    UC36812UCJEPSXanthium spinosumJ. Burtt Davy1898-9-17 Alamedanw Alameda County Alameda Marshes
    UC485133UCJEPSXanthium spinosumR. L. Pendleton4861906-8-19 Santa Clarabank of Campbell Creek Saratoga
    UC485134UCJEPSXanthium spinosumC. F. Millspaugh45091920-1-02 Los Angelesin bed of dry stream beyond Golf Links; Santa Canon
    UC485135UCJEPSXanthium spinosumHarriet A. Walker8841907-9-08 San JoaquinLathrop
    UC519963UCJEPSXanthium spinosumLouis C. Wheeler14231932-10-07 Los AngelesUniversity of California campus, Los Angeles University of California campus, Los Angeles (w Los Angeles)
    UC537023UCJEPSXanthium spinosumLawrence M. Booth12401932-7-01 OrangeAnaheim Marsh
    UC54178UCJEPSXanthium spinosumErnest Braunton7311902-11-08 Los AngelesSherman
    UC571652UCJEPSXanthium spinosumH. K. Sharsmith38451936-9-12 Santa Claraeastern slope Mount Day Ridge (below spring in abandoned farmyard); Mount Hamilton Range
    UC582623UCJEPSXanthium spinosumJoseph P. Tracy86861929-11-11 HumboldtWillow Creek Trinity River Valley
    UC604736UCJEPSXanthium spinosumLouis C. Wheeler44501936-9-08 MontereyCarmelo Meadow , Carmelo Meadow (Pt. Lobos Reserve)
    UC668191UCJEPSXanthium spinosumJoseph P. Tracy161741938-10-30 HumboldtHolmes Flat
    UC685606UCJEPSXanthium spinosumBob Rodin2981943-7-30 Alamedaon southern slope near cyclotron; Berkeley, University of California campus, Strawberry Canon
    UC691367UCJEPSXanthium spinosumMary L. Bowerman4391930-8-31 Contra Costaroadside near south entrance; Mount Diablo
    UC691384UCJEPSXanthium spinosumMary L. Bowerman16681932-11-25 Contra Costaat head of spring Mount Diablo, Silver Spring
    UC735726UCJEPSXanthium spinosumCharles B. Heiser, Jr.19241947-6-01 YoloDavis
    UC89858UCJEPSXanthium spinosumE. Palmer, M. D.2661876-6-01 San Luis ObispoCentral California
    UC912206UCJEPSXanthium spinosumP. Schulthess1931-8-05 LakeHighland Springs
    UC912237UCJEPSXanthium spinosumHerbert L. Mason7671923-10-06 Napain pasture bordering Suisun Marsh
    UCR101883UCRXanthium spinosumA.C. Sanders223571998-11-22 KernJawbone Canon, north of Cross Mtn., near White Mtn. and confluence with Cottonwood Creek.; SE Sierra Nevada Mtns.
    UCR103719UCRXanthium spinosumB.G. Pitzer33721997-11-08 OrangeCrystal Cove State Park, along Moro Canon Trail, from beginning to a point c. 1.75 miles up the canyon; San Joaquin Hills
    UCR109591UCRXanthium spinosumRichard D. Goedens.n.1978-9-21 VenturaMain Street, west of the Ventura River; Ventura
    UCR109607UCRXanthium spinosumRichard D. Goedens.n.1965-9-28 Santa BarbaraSanta Cruz Island, mouth of Canon] at the ocean; Santa Cruz Island
    UCR114172UCRXanthium spinosumB.G. Pitzer32831997-10-06 San BernardinoLos Rios Rancho, south of Oak Glen, field south of pond; San Bernardino Mtns.
    UCR11541UCRXanthium spinosumF. Harlan Lewis10031939-9-23 Los AngelesWest Los Angeles
    UCR118663UCRXanthium spinosumA.C. Sanders220901998-7-02 VenturaMoorpark, hills south of Tierra Rejada Valley, along Read Rd. c. 1/2 mile east of Moorpark Rd., just west of Hwy 23, c. 1 mile NW of Wood Ranch Reservoir, c. 2 miles NE of Thousand Oaks; Moorpark
    UCR123359UCRXanthium spinosumA.C. Sanders254722002-7-30 Los AngelesNewhall Ranch, Potrero Canon just above old ranch buildings and corrals
    UCR125120UCRXanthium spinosumA.C. Sanders251102002-6-18 Los AngelesNewhall Ranch, farm area in valley along a wash, 1 mile SSW of Canon, west of Magic Mountain amusement park
    UCR125269UCRXanthium spinosumA.C. Sanders255412002-8-1 Los AngelesNewhall Ranch, central Potrero Canon, at circular cement cattle trough on south side of valley
    UCR127559UCRXanthium spinosumA.C. Sanders267812003-5-21 RiversideWildomar, old ranch parcel SE of Wesley St. and SW of Laguna Rd., west of Orange St., NE of Palomar St.
    UCR132009UCRXanthium spinosumGeorge K. Helmkamp82102003-10-8 San Luis Obispobase of Nipomo Mesa 0.25 mile SW of Halcyon Rd along an unnamed road near the railroad crossing
    UCR132530UCRXanthium spinosumA.C. Sanders205551997-4-20 KernSan Emigdio Ranch, along dirt road from San Emigdio Canon south to Los Lobos Creek
    UCR134698UCRXanthium spinosumGeorge K. Helmkamp81532003-9-19 San Luis ObispoNipomo Mesa area. Pomeroy Rd, 0.2 mile south of Los Berros Rd.
    UCR147247UCRXanthium spinosumGeorge K. Helmkamp87822004-8-14 San Luis Obispojunction of Thompson Rd. and Mehlschau Rd., NE of Nipomo
    UCR151118UCRXanthium spinosumScott D. White71891998-10-15 OrangeYorba Linda, c. 0.5 mile south of Telegraph Canon between Ohio St. and Fairmont Blvd.
    UCR161632UCRXanthium spinosumMike Misenhelters.n.2005-10-5 Los AngelesCanon, old landfill site SE of intersection of 110 (Harbor) and 405 (San Diego) freeways, west side of Dominguez Channel and 405, east of Main St.
    UCR184273UCRXanthium spinosumA.C. Sanders340792007-6-6 KernGeghus Ridge c. 7 miles NE of Lebec, S-facing slopes above Bear Trap Canon, below VABM (4260 ft.) Lewis
    UCR193042UCRXanthium spinosumA.C. Sanders354752008-6-17 OrangeLomas de Santiago, East Loma Ridge Spur Road near Hicks Cyn. Haul Rd.
    UCR19308UCRXanthium spinosumO.F. Clarkes.n.1964-6-20 RiversideRiverside, O.F. Clarke's property, 1012 Spruce Street
    UCR19498UCRXanthium spinosumJohn C. Rooss.n.1965-7-21 San BernardinoLoma Linda
    UCR201544UCRXanthium spinosumGeorge K. Helmkamp142902008-10-30 Sacramentoalong Highway E13 (Twin Cities Road) 4.4 miles west of its junction with CA-99
    UCR201741UCRXanthium spinosumGeorge K. Helmkamp142142008-10-6 SutterSouth Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City
    UCR201776UCRXanthium spinosumGeorge K. Helmkamp142072008-10-6 Yubajunction of CA-65 and Ostrom No. 3 Road, southeast of Olivehurst
    UCR203003UCRXanthium spinosumPhillip Roullard1582007-8-4 San DiegoSan Diego, Border Field State Park, 0.5 m south of westernmost end of Monument Road, just north of US/Mexico border, near beach. Square W10
    UCR219160UCRXanthium spinosumGeorge K. Helmkamp156922009-10-20 El DoradoSand Ridge Road 0.9 mile east of CA-49, at the junction with Morales Ranch Road, 6.8 air mi. SSW (188 ° ) of Diamond Springs
    UCR235438UCRXanthium spinosumGeorge K. Helmkamp184962011-11-28 SutterSacramento Ave., 0.2 miles from its junction with CA-99, 0.7 W of Nicolaus, beside the levee of the Feather River
    UCR250551UCRXanthium spinosumMark A. Elvin72132013-8-9 San Luis ObispoSanta Maria River Valley, Guadalupe Dunes. Guadalupe-Nipomo Dunes National Wildlife Refuge, north edge of Refuge, at parking lot and sand dune interface
    UCR253819UCRXanthium spinosumMitch Provance0607--142007-6-29 KernTejon Ranch, Tejon Mountain Village survey area 8.3B, SE rim of Dry Field Canon, c. 2 miles east of Castac Lake
    UCR26353UCRXanthium spinosumA.C. Sanders23971981-10-31 RiversideMcKinley St. between Riverside and Corona, at the point where McKinley ends c. 1 mi north of the Riverside (91) Freeway
    UCR281817UCRXanthium spinosumMitch Provance617--622017-6-29 Los AngelesSanta Canon, SCE corridor, vicinity of Middle Ranch Rd., ENE of Thompson Dam
    UCR284751UCRXanthium spinosumTim Thomas24071999-10-31 KernEmigdio Ranch, Neasons Flat
    UCR291881UCRXanthium spinosumGeorge K. Helmkamps.n.1974-9-28 San Luis Obispo3 miles west of Lopez Lake
    UCR46562UCRXanthium spinosumB.G. Pitzer03431986-10-21 OrangeLomas de Santiago, c. 10 mi east of Santa Ana along Jeffrey Rd. in Hicks Canon, c. 1.0 mi north of South Coast Gun Club
    UCR48573UCRXanthium spinosumC. Butschs.n.1987-4-23 San BernardinoStellingwerf Dairy in Chino
    UCR52414UCRXanthium spinosumDon Pendletons.n.1988-6-06 Santa BarbaraSanta Rosa Island, Becher's Bay area, halway between the Ranch and Skunk Pt; Santa Rosa Island
    UCR73178UCRXanthium spinosumScott D. White8731992-10-08 Los AngelesMalibu, just north of Pacific Coast Hwy [= CA Hwy 1], extending as far east as Malibu Creek. Bounded on the south by Civic Center Road; terminates on the west in vicinity of Malibu School
    UCR77547UCRXanthium spinosumSteven A. JunakSC--20531990-10-16 Santa BarbaraSanta Cruz Island, mouth of Pozo Creek; Santa Cruz Island
    UCR95600UCRXanthium spinosumJohn Wears.n.1996-10-16 MontereyArroyo Seco, near center of Paraiso Springs USGS Q.
    UCSB028798UCSBXanthium spinosumMagney, David; Wellonen, CherABF-124-012001-4-5 Santa BarbaraOuter South Coast Ranges; Orcutt Quad., T9N, R3 W, Punta De La Laguna, San Bernardino BM; between Solomon & Black Roads (~280-ac site); N of SR1, W of Orcutt, Plot/Trench #13/Stop #15 ~5,000 feet WNW of Solomon Rd. bridge & ~940 feet NNE of SR1
    UCSB028799UCSBXanthium spinosumWellonen, Cher; Olsen, JodyU-86-991999-11-04 VenturaWestern Transverse Ranges; Santa Paula Peak Quad.; Ex Mission San Buenaventura; T4N, R2 W San Bernardino Base Meridian; found in SE Sulphur Mtn., Adams Canon, Parcel H
    UCSB028800UCSBXanthium spinosumMartin Fletcher1931979-12-07 Santa BarbaraOn the west ridge of Canada de Sanita Anita, 0.7 mile up Del Norte, on the canyon floor
    UCSB028801UCSBXanthium spinosumRalph Philbrick1841954-7-01 OrangeOn Bathgate Ranch, 3 miles north of San Juan Capistrano
    UCSB028802UCSBXanthium spinosumDavid PritchettCSM-2301987-10-30 Santa BarbaraBetteravia, 1.5 km. ESE of Union Sugar facility.
    UCSB028803UCSBXanthium spinosumDennis E. Breedlove5421961-6-04 Santa BarbaraAlong the Alamo Pintado Creek from 7-8 miles north of Los Olivos; base of Figueroa Mountain, Birabent Canon, San Rafael Range
    UCSB028804UCSBXanthium spinosumMaynard F. Moseley381949-11-05 Santa BarbaraNo Data
    UCSB028805UCSBXanthium spinosumBotanical Society541978-11-05 Santa Barbara50 yds. below hot springs off of fire road, Gaviota State Park
    UCSB028806UCSBXanthium spinosumWilliams, M.23152000-8-31 Santa BarbaraSouthern foothills of the San Rafael Range, Sedgwick Reserve, at intersection of Lisque and Figueroa roads
    UCSB040911UCSBXanthium spinosumAndrew C. Sanders267812003-5-21 RiversideElsinore Valley: Wildomar, old ranch parcel SE of Wesley St. and SW of Laguna Rd., west of Orange St., NE of Palomar St.; 33.6136111 -117.2786111
    UCSC8808UCSCXanthium spinosumAl KeuterAK00-0382012-11-6 Santa CruzQuail Hollow Ranch County Park, north edge of central meadow bounded by Discover Loop Trail.
    UCSC9283UCSCXanthium spinosumD. Styer5462012-9-21 MontereyFt. Ord National Monument Boy Scout Lake (Region L9)

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