Cirsium eatonii

Cirsium eatonii, commonly known as Eaton's thistle or mountaintop thistle, is a North American species of flowering plants in the aster family.[2][3]

Cirsium eatonii
Cirsium eatonii var. clokeyi
in Southern Nevada
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Cirsium
Species:
C. eatonii
Binomial name
Cirsium eatonii
Synonyms[1]

The species has been found in Idaho, Montana, New Mexico, Wyoming, Nevada, Utah and Colorado.[4]

Description

Cirsium eatonii is highly variable. It is an erect herb up to 150 cm (60 inches or 5 feet) tall in some populations. The entire foliage is more or less spiny. One plant produces several flower heads with pink to purple or yellow flowers. The species grows at high elevations in grasslands, sagebrush steppes, open savannahs, etc.[3]

Varieties[1][3]

A number of varieties have been identified, which include:

Var. eriocephalum in northern New Mexico.

References

  1. The Plant List, Cirsium eatonii (A.Gray) B.L.Rob.
  2. "Cirsium eatonii". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 11 March 2012.
  3. "Cirsium eatonii". Flora of North America. efloras.org. Retrieved 11 March 2012.
  4. "Cirsium eatonii (A. Gray) B.L. Rob". USDA PLANTS database. Retrieved 11 March 2012.


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