Cirsium clavatum

Cirsium clavatum
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Subfamily:	Carduoideae
Tribe:	Cynareae
Genus:	Cirsium
Species:	C. clavatum
Binomial name
*Cirsium clavatum* (M.E.Jones) Petr.
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 (Fish Lake thistle)^[2] is a North American species of plants in the thistle tribe within the sunflower family. The species is native to the western United States, the States of Wyoming, Colorado, Utah, Arizona, and New Mexico.^[3]^[4]

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]

Cirsium clavatum var. americanum (A.Gray) D.J.Keil - Colorado, Utah, Wyoming
Cirsium clavatum var. clavatum - Colorado, Utah
Cirsium clavatum var. osterhoutii (Rydb.) D.J.Keil - Colorado

References

1 2 The Plant List, Cirsium clavatum (M.E.Jones) Petr.
↑ "Cirsium clavatum". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 20 June 2015.
↑ Biota of North America Program 2014 county distribution map
↑ Keil, David John 2004. Sida 21:207-219
1 2 Flora of North America, Cirsium clavatum (M. E. Jones) Petrak

External links

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