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Cirsium occidentale

(Nutt.) Jepson

Fall Thistle

G3Vulnerable (G3G4) Found in 190 roadless areas NatureServe Explorer →
G3VulnerableGlobal Rank
Identity
Unique IDELEMENT_GLOBAL.2.1253067
Element CodePDAST2E410
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusCirsium
Other Common Names
cobwebby thistle (EN) Cobwebby Thistle (EN)
Concept Reference
Flora of North America Editorial Committee (FNA). 2006a. Flora of North America north of Mexico. Vol. 19. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York. xxiv + 579 pp.
Taxonomic Comments
As treated here (following Kartesz, 1999 and Flora of North America Editorial Committee 2006), Cirsium occidentale is a broader concept than that in Kartesz (1994). Kartesz, (1999) and Flora of North America Editorial Committee (2006) include var. californicum, var. candidissima, and var. venustum in C. occidentale. These were each recognized as species (C. californicum, C.pastoris, and C. proteanum respectively) by Kartesz (1994).
Conservation Status
Review Date2001-05-03
Change Date2001-05-03
Ecology & Habitat
Other Nations (1)
United StatesN3
ProvinceRankNative
OregonSNRYes
NevadaSNRYes
CaliforniaSNRYes
Plant Characteristics
Economic Value (Genus)No
Roadless Areas (190)
California (177)
AreaForestAcres
AgnewSequoia National Forest9,561
AntimonyLos Padres National Forest40,911
Arroyo SecoAngeles National Forest4,703
BackboneShasta-Trinity National Forest11,466
Bald MountainTahoe National Forest5,832
Bald RockPlumas National Forest4,675
Barker ValleyCleveland National Forest11,940
Bear MountainLos Padres National Forest913
Bell QuinbyShasta-Trinity National Forest11,556
Big Butte ShinboneMendocino National Forest4,265
Big RocksLos Padres National Forest11,866
Birch CreekInyo National Forest28,816
Black ButteLos Padres National Forest5,116
Black ButteMendocino National Forest15,461
Black CanyonInyo National Forest32,421
Black MountainLos Padres National Forest16,818
Black Mtn.Sequoia National Forest15,102
Boundary Peak (CA)Inyo National Forest210,884
Bucks LakePlumas National Forest680
Cactus Springs BSan Bernardino National Forest3,106
Cahuilla MountainSan Bernardino National Forest6,952
CajonSan Bernardino National Forest7,548
CalienteCleveland National Forest5,953
CamuesaLos Padres National Forest8,209
Carson - IcebergStanislaus National Forest56,430
Chalk PeakLos Padres National Forest7,472
ChanchelullaShasta-Trinity National Forest3,915
ChannellSequoia National Forest45,429
ChicoSequoia National Forest39,836
ChinquapinShasta-Trinity National Forest22,040
Chips CreekLassen National Forest29,089
Chips CreekPlumas National Forest12,940
Circle MountainSan Bernardino National Forest6,375
City CreekSan Bernardino National Forest9,997
ColdwaterCleveland National Forest8,402
Cow CreekShasta-Trinity National Forest22,627
Coyote SoutheastInyo National Forest53,159
Crystal CreekSan Bernardino National Forest6,783
Cub CreekLassen National Forest8,643
Cucamonga AAngeles National Forest1,249
Cucamonga BSan Bernardino National Forest11,933
Cucamonga CSan Bernardino National Forest4,106
CuyamaLos Padres National Forest19,631
De La GuerraLos Padres National Forest5,418
Deep CreekSan Bernardino National Forest23,869
Deer MountainMendocino National Forest11,716
Dennison PeakSequoia National Forest6,293
Devil GulchSierra National Forest30,490
Devils RockShasta-Trinity National Forest16,209
DiableLos Padres National Forest19,597
Dinkey LakesSierra National Forest34,171
Dog CreekShasta-Trinity National Forest5,001
DomeStanislaus National Forest11,085
Domeland Add.Sequoia National Forest3,046
Dry LakesLos Padres National Forest17,043
EagleShasta-Trinity National Forest6,553
Eagle PeakCleveland National Forest6,481
East ForkShasta-Trinity National Forest6,201
East GirardShasta-Trinity National Forest27,894
Ferguson RidgeSierra National Forest6,104
Fish CanyonAngeles National Forest29,886
Fisher Gulch BShasta-Trinity National Forest4,791
Fox MountainLos Padres National Forest52,072
Garcia MountainLos Padres National Forest7,850
Glass MountainInyo National Forest52,867
GrangerModoc National Forest23
Granite PeakSan Bernardino National Forest450
Greenhorn CreekSequoia National Forest28,226
GrindstoneMendocino National Forest26,031
Grizzly PeakPlumas National Forest6,222
Hixon FlatSan Bernardino National Forest8,095
Horse Creek RidgeSan Bernardino National Forest8,969
HortonInyo National Forest5,717
Iceberg - Mill CreekHumboldt-Toiyabe National Forest26,988
IshiLassen National Forest21,805
Jennie LakeSequoia National Forest2,388
JuncalLos Padres National Forest12,289
KangarooKlamath National Forest40,617
Kettle Mtn.Shasta-Trinity National Forest4,589
Kings RiverSierra National Forest52,999
La BreaLos Padres National Forest14,031
La PanzaLos Padres National Forest4,954
LaddCleveland National Forest5,300
Little French CShasta-Trinity National Forest11,529
Little PineLos Padres National Forest1,315
Lpoor CanyonLos Padres National Forest13,762
Machesna MountainLos Padres National Forest12,271
Magic MountainAngeles National Forest15,542
Malduce BuckhornLos Padres National Forest14,177
ManzanaLos Padres National Forest2,101
MatilijaLos Padres National Forest5,218
MayfieldLassen National Forest14,444
Middle ForkPlumas National Forest29,278
Mill CreekSequoia National Forest27,643
Mill CreekLassen National Forest7,587
Mill PeakSan Bernardino National Forest7,884
Mokelumne - SprattHumboldt-Toiyabe National Forest613
MonarchSierra National Forest697
MonoLos Padres National Forest28,141
MosesSequoia National Forest22,077
Mt. Shasta BShasta-Trinity National Forest2,809
Murphy GladeShasta-Trinity National Forest1,015
Mystic (CA)Humboldt-Toiyabe National Forest836
NightStanislaus National Forest3,173
No NameCleveland National Forest4,897
NordhoffLos Padres National Forest12,031
North MountainStanislaus National Forest7,856
Orleans Mtn.Klamath National Forest49,090
Orleans Mtn. BSix Rivers National Forest17,183
Orleans Mtn. CSix Rivers National Forest15,589
PaiuteInyo National Forest58,712
PantherShasta-Trinity National Forest12,016
PattisonShasta-Trinity National Forest29,299
Penney RidgeShasta-Trinity National Forest5,226
Pilot CreekSix Rivers National Forest9,192
Pine CreekCleveland National Forest503
Pleasant ViewAngeles National Forest26,395
PortugueseKlamath National Forest18,915
Pyramid Peak BSan Bernardino National Forest7,194
QuatalLos Padres National Forest7,253
Raywood Flat BSan Bernardino National Forest11,373
Red MountainAngeles National Forest8,034
RinconSequoia National Forest54,610
Rouse HillSan Bernardino National Forest13,745
RubiconEldorado National Forest4,872
RussianKlamath National Forest21,771
Salt CreekAngeles National Forest11,022
Salt CreekSix Rivers National Forest9,505
Salt GulchShasta-Trinity National Forest6,511
San DimasAngeles National Forest7,160
San Gabriel AddAngeles National Forest2,527
San SevaineSan Bernardino National Forest6,866
Santa CruzLos Padres National Forest21,182
Sawmill - BadlandsLos Padres National Forest51,362
ScodiesSequoia National Forest725
Sespe - FrazierLos Padres National Forest106,910
Sespe - FrazierAngeles National Forest4,254
ShacklefordKlamath National Forest1,679
Sheep MountainAngeles National Forest21,098
Sill HillCleveland National Forest5,294
Silver HillHumboldt-Toiyabe National Forest4,423
SiskiyouKlamath National Forest54,039
Siskiyou BSix Rivers National Forest18,871
Slate Mtn.Sequoia National Forest12,299
SnoozerKlamath National Forest23,414
Snow MountainMendocino National Forest14,457
SoldierModoc National Forest10,102
Soldier CanyonInyo National Forest40,589
SoliderSix Rivers National Forest14,918
South ForkShasta-Trinity National Forest16,786
South SierraSequoia National Forest8,008
South SierraInyo National Forest41,853
Stanley MountainLos Padres National Forest14,674
Stoveleg GapShasta-Trinity National Forest61
Strawberry PeakAngeles National Forest7,245
SugarloafSan Bernardino National Forest8,206
TequepisLos Padres National Forest9,080
ThatcherMendocino National Forest16,652
Thomes CreekMendocino National Forest16,616
Timbered CraterLassen National Forest4,096
TinemahaInyo National Forest27,060
Tom MartinKlamath National Forest9,031
TrabucoCleveland National Forest23,341
Trumbull PeakStanislaus National Forest6,164
TuleAngeles National Forest9,861
UnderwoodSix Rivers National Forest6,591
WaterhouseStanislaus National Forest4,394
West GirardShasta-Trinity National Forest37,516
WestforkAngeles National Forest4,407
Wheeler RidgeInyo National Forest15,744
White LedgeLos Padres National Forest18,632
Wild Horse Mtn. (CA)Humboldt-Toiyabe National Forest28,822
Wilderness ContiguousMendocino National Forest3,606
WildhorseCleveland National Forest1,483
Wonoga Pk.Inyo National Forest11,272
WoodpeckerSequoia National Forest11,936
WoolstaffSequoia National Forest41,445
Nevada (10)
AreaForestAcres
Jobs Peak (NV)Humboldt-Toiyabe National Forest1,342
Mystic (NV)Humboldt-Toiyabe National Forest5,644
Rose - Alum CreekHumboldt-Toiyabe National Forest853
Rose - Davis Mdw.Humboldt-Toiyabe National Forest2,361
Rose - EvansHumboldt-Toiyabe National Forest4,782
Rose - GalenaHumboldt-Toiyabe National Forest3,711
Rose - Hunter EastHumboldt-Toiyabe National Forest54
Rose - NortheastHumboldt-Toiyabe National Forest550
Rose - Whites CanyonHumboldt-Toiyabe National Forest2,568
Wellington HillsHumboldt-Toiyabe National Forest21,009
Oregon (3)
AreaForestAcres
North KalmiopsisSiskiyou National Forests91,560
Shasta CostaSiskiyou National Forests14,420
South KalmiopsisSiskiyou National Forests104,477
References (2)
  1. Flora of North America Editorial Committee (FNA). 2006a. Flora of North America north of Mexico. Vol. 19. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York. xxiv + 579 pp.
  2. Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.