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Pleiacanthus spinosus

(Nutt.) Rydb.

Thorny Wire-lettuce

G4Apparently Secure Found in 98 roadless areas NatureServe Explorer →
G4Apparently SecureGlobal Rank
Identity
Unique IDELEMENT_GLOBAL.2.158665
Element CodePDAST8U0E0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusPleiacanthus
Synonyms
Lygodesmia spinosaNutt.Stephanomeria spinosa(Nutt.) S. Tomb
Other Common Names
thorn skeletonweed (EN)
Concept Reference
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.
Conservation Status
Review Date1987-09-29
Change Date1987-09-29
Range Extent Comments
B.C. to MT, south to CA and AZ. Peripheral.
Ecology & Habitat

Habitat

This species is found on stony loam in arid grasslands at lower elevations (MT NHP, 2022).
Terrestrial Habitats
Grassland/herbaceous
Other Nations (1)
United StatesNNR
ProvinceRankNative
IdahoSNRYes
OregonSNRYes
CaliforniaSNRYes
NevadaS4Yes
ArizonaSNRYes
MontanaS2Yes
UtahSNRYes
Plant Characteristics
Economic Value (Genus)No
Roadless Areas (98)
California (38)
AreaForestAcres
Birch CreekInyo National Forest28,816
Black CanyonInyo National Forest32,421
Boundary Peak (CA)Inyo National Forest210,884
Carson - IcebergStanislaus National Forest56,430
Coyote NorthInyo National Forest11,932
Coyote SoutheastInyo National Forest53,159
DardanellesEldorado National Forest8,110
Devil's Gate (CA)Humboldt-Toiyabe National Forest9,946
Dexter CanyonInyo National Forest17,053
Glass MountainInyo National Forest52,867
Hoover - Green Ck NoHumboldt-Toiyabe National Forest7,155
Hoover - Mt.olsenHumboldt-Toiyabe National Forest624
Hoover - NorthHumboldt-Toiyabe National Forest1,574
Hoover - Virginia LksHumboldt-Toiyabe National Forest5,050
Horse Mdw.Inyo National Forest5,687
HortonInyo National Forest5,717
Iceberg - Mill CreekHumboldt-Toiyabe National Forest26,988
Log Cabin SaddlebagInyo National Forest15,165
Mokelumne - SprattHumboldt-Toiyabe National Forest613
Mono CratersInyo National Forest7,115
Mt. JacksonHumboldt-Toiyabe National Forest20,721
Mt. OlsenInyo National Forest2,161
Nevahbe RidgeInyo National Forest302
North LakeInyo National Forest2,406
Raymond PeakEldorado National Forest2,518
Robinson PeakHumboldt-Toiyabe National Forest5,835
Rock Creek WestInyo National Forest3,626
Silver HillHumboldt-Toiyabe National Forest4,423
SoldierModoc National Forest10,102
Soldier CanyonInyo National Forest40,589
Sweetwater (CA)Humboldt-Toiyabe National Forest19,241
Table Mtn.Inyo National Forest4,215
TinemahaInyo National Forest27,060
Tragedy - Elephants BackEldorado National Forest20,866
WattersonInyo National Forest6,922
Wheeler RidgeInyo National Forest15,744
Whisky CreekInyo National Forest865
Wild Horse Mtn. (CA)Humboldt-Toiyabe National Forest28,822
Idaho (2)
AreaForestAcres
Pioneer MountainsSalmon-Challis National Forest172,460
Pioneer MountainsSawtooth National Forest119,563
Nevada (43)
AreaForestAcres
Alta T - East BHumboldt-Toiyabe National Forest21,732
Angel Peak NorthHumboldt-Toiyabe National Forest12,577
Aurora CraterHumboldt-Toiyabe National Forest5,689
Bald Mtn.Humboldt-Toiyabe National Forest41,598
Black SpringHumboldt-Toiyabe National Forest11,016
Boundary Peak (NV)Inyo National Forest21,851
ButtermilkHumboldt-Toiyabe National Forest19,373
Charleston - Macks CynHumboldt-Toiyabe National Forest11,378
Currant - East SlopeHumboldt-Toiyabe National Forest10,101
Duck Creek Mtns.Humboldt-Toiyabe National Forest12,165
Grant - IrwinHumboldt-Toiyabe National Forest11,196
Grant - TroyHumboldt-Toiyabe National Forest3,826
Humboldt - Angel LkHumboldt-Toiyabe National Forest1,008
Jobs Peak (NV)Humboldt-Toiyabe National Forest1,342
Larken LakeHumboldt-Toiyabe National Forest4,159
Long ValleyHumboldt-Toiyabe National Forest50,472
Mahogany RidgeHumboldt-Toiyabe National Forest16,765
Moriah - Hendrys Ck.Humboldt-Toiyabe National Forest2,345
Mt. EtnaHumboldt-Toiyabe National Forest20,527
Mt. HicksHumboldt-Toiyabe National Forest15,698
NorthumberlandHumboldt-Toiyabe National Forest22,464
Pearl PeakHumboldt-Toiyabe National Forest71,405
Pine Grove SouthHumboldt-Toiyabe National Forest88,945
QuinnHumboldt-Toiyabe National Forest62,459
Red MountainHumboldt-Toiyabe National Forest30,242
Rose - EvansHumboldt-Toiyabe National Forest4,782
Rose - Whites CanyonHumboldt-Toiyabe National Forest2,568
Ruby - SouthHumboldt-Toiyabe National Forest13,195
Santa RosaHumboldt-Toiyabe National Forest54,555
Snake - Big WashHumboldt-Toiyabe National Forest4,146
Snake - ChokecherryHumboldt-Toiyabe National Forest30,845
Snake - HatcheryHumboldt-Toiyabe National Forest4,627
Snake - MurphyHumboldt-Toiyabe National Forest27,064
South SchellHumboldt-Toiyabe National Forest125,614
Spanish PeakHumboldt-Toiyabe National Forest31,520
SugarloafInyo National Forest11,534
Sweetwater (NV)Humboldt-Toiyabe National Forest5,946
Table Mtn. - EastHumboldt-Toiyabe National Forest87,789
Warm SpringsHumboldt-Toiyabe National Forest29,540
West SchellHumboldt-Toiyabe National Forest21,656
WildcatHumboldt-Toiyabe National Forest28,565
WilhoitesHumboldt-Toiyabe National Forest11,297
WoodsHumboldt-Toiyabe National Forest7,467
Oregon (1)
AreaForestAcres
Drake - McdowellFremont National Forest5,767
Utah (14)
AreaForestAcres
418031Uinta National Forest18,173
AtchinsonDixie National Forest17,655
Boulder Mtn. / Boulder Top / Deer LakeDixie National Forest110,690
Box - Death HollowDixie National Forest3,175
Burch CreekWasatch-Cache National Forest6,938
Dark ValleyDixie National Forest27,481
Happy ValleyDixie National Forest14,458
Hilgard MountainFishlake National Forest28,389
Long Neck Mesa / Steep Creek / Oak Creek - Steep Creek / OakDixie National Forest55,489
Lookout PeakFishlake National Forest9,195
Red Canyon NorthDixie National Forest9,973
Red Canyon SouthDixie National Forest3,736
Solomon BasinFishlake National Forest19,963
Thousand Lake MountainFishlake National Forest27,267
References (3)
  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.
  3. Montana Natural Heritage Program. 2022. Spiny Skeletonweed - <i>Pleiacanthus spinosus</i>. Montana Field Guide. Retrieved on September 28, 2022, from https://fieldguide.mt.gov/speciesDetail.aspx?elcode=PDAST8U0E0