Prairie Thistle (Cirsium hillii)

Synonym:

Status: threatened in Wisconsin

Habitat Description: dry prairies

Habitat Classification
WI NHI: Dry-Mesic Prairie, Dry Prairie, and Sand Prairie
Curtis: Dry-Mesic Prairie, Dry Prairie, and Sand Prairie
Kotar:
Forest Cover:

Range: Buffalo, Chippewa, Crawford, Columbia, Dane, Douglas, Dunn, Eau Claire, Grant, Green, Iowa, La Crosse, Lafayette, Marinette, Pierce, Racine, Rock, Sauk, St Croix, Vernon, Walworth, and Waukesha

Comments:

Phenology: a perennial, producing basal rosettes of leaves the first year, followed by flowers one or two years later; flowers in June or July

Field Guides:
Britton and Brown, p.3:508/p.3:508
Gleason 1963, p.750
Gleason 1991, p.612