Wheeler's Thistle

Cirsium wheeleri

Wheeler's Thistle, Cirsium wheeleri, photo © by Mike Plagens

Observed in the ponderosa forest of Upper East Verde watershead just below the Mogollon Rim, Gila Co., Arizona, USA. August 2010.

Sponsored Links:

Insect Fauna

Bumblebee Bombus huntii

Hunt's Bumblebee

FLOWERS: Pink to pale purple flowers subtended by a spiny involucre. Visited by butterflies. Blooming from mid summer during the rainy season.

LEAVES: Leaves silvery-green due to abundant fine silky hairs on young leaves. Elyptic to linear with sharp prickles along margins.

PERENNIAL: Usually one, but sometimes a few stems from a root system that can survive several seasons. Most mature, flowering plants exceed one meter in height.

RANGE: Found in montane meadows and forest edges from Utah and Colorado south into Mexico.

FRUIT: The brown seeds are topped with silky white hairs that aid in wind dispersal.

ARMED. The leaves and flower bracts have slender, sharp prickles.

Asteraceae -- Sunflower Family

More Information:

Sponsored Link:

Arizona Naturalist
Arizona's Ponderosa Woodlands
The Flora of Arizona's Ponderosa Woodlands


Copyright Michael J. Plagens, page created 10 February 2012,
updated 14 Dec. 2016.