Cirsium clavatum

Cirsium clavatum, the Fish Lake thistle or fringed thistle,[2] is a North American species of plants in the tribe Cardueae within the family Asteraceae. The species is native to the western United States, the States of Wyoming, Colorado, Utah, Arizona, and New Mexico.[3][4]

Cirsium clavatum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Cirsium
Species:
C. clavatum
Binomial name
Cirsium clavatum
Synonyms[1]
Synonymy
  • Carduus clavatus (M.E.Jones) A.Heller
  • Cnicus clavatus M.E.Jones
  • Carduus centaureae Rydb.
  • Carduus laterifolius Osterh., syn of var. americanum
  • Carduus spathulatus Osterh., syn of var. americanum
  • Cirsium centaureae (Rydb.) K.Schum., syn of var. americanum
  • Cirsium griseum (Rydb.) K.Schum., syn of var. americanum
  • Cirsium laterifolium (Osterh.) Petr., syn of var. americanum
  • Cirsium modestum (Osterh.) Cockerell, syn of var. americanum
  • Cirsium scapanolepis Petr., syn of var. americanum
  • Cirsium spathulifolium Rydb., syn of var. americanum
  • Cnicus americanus (A.Gray) A.Gray, syn of var. americanum
  • Carduus araneosus Osterh., syn of var. osterhoutii
  • Carduus osterhoutii Rydb., syn of var. osterhoutii
  • Cirsium araneans Rydb., syn of var. osterhoutii
  • Cirsium osterhoutii (Rydb.) Petr., syn of var. osterhoutii

Cirsium clavatum is a biennial or perennial herb up to 100 cm (40 inches) tall, blooming only once before dying. Leaves have thin spines along the edge, much smaller than those of related species. There are several to many flower heads, with white or pale pink disc florets but no ray florets.[5]

Varieties[1][5]

References
  1. The Plant List, Cirsium clavatum (M.E.Jones) Petr.
  2. USDA, NRCS (n.d.). "Cirsium clavatum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 20 June 2015.
  3. Biota of North America Program 2014 county distribution map
  4. Keil, David John 2004. Sida 21:207-219
  5. Flora of North America, Cirsium clavatum (M. E. Jones) Petrak


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