Roadless Areas
Home/Species/ Tweedy's Thistle

Cirsium tweedyi

Rydb.

Tweedy's Thistle

GNRUnranked Found in 8 roadless areas NatureServe Explorer →
GNRUnrankedGlobal Rank
Identity
Unique IDELEMENT_GLOBAL.2.1349784
Element CodePDAST2E450
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusCirsium
Concept Reference
Siniscalchi, C.M., J.R. Ackerfield, and R.A. Folk. 2023. Diversification and biogeography of North American thistles (Cirsium: Carduoideae: Compositae): Drivers of a rapid continent-wide radiation. International Journal of Plant Sciences 184: 322-341.
Taxonomic Comments
Siniscalchi et al. (2023) recognizes Cirsium tweedyi as a distinct species. In contrast, FNA (2006) included C. tweedyi in C. eatonii var. murdockii.
Ecology & Habitat
Other Nations (1)
United StatesNNR
ProvinceRankNative
WyomingSNRYes
MontanaSNRYes
Plant Characteristics
Economic Value (Genus)No
Roadless Areas (8)
Montana (4)
AreaForestAcres
Line Creek PlateauCuster National Forest24,825
Mt. Gmt Area HCuster National Forest1,335
Proposed Line Creek PrnaCuster National Forest389
Red Lodge Creek HellroaringCuster National Forest17,210
Wyoming (4)
AreaForestAcres
Beartooth Proposed WildernessShoshone National Forest16,837
Little BighornBighorn National Forest133,949
South Beartooth HighwayShoshone National Forest105,570
Walker PrairieBighorn National Forest62,434
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. Siniscalchi, C.M., J.R. Ackerfield, and R.A. Folk. 2023. Diversification and biogeography of North American thistles (<i>Cirsium</i>: Carduoideae: Compositae): Drivers of a rapid continent-wide radiation. International Journal of Plant Sciences 184: 322-341.