Prairie Milkweed, Sullivant's Milkweed (Asclepias sullivantii)

Synonym:

Status: threatened in Wisconsin

Habitat Description: moist prairies

Habitat Classification
WI NHI: Mesic Prairie, Wet-Mesic Prairie
Curtis: Mesic Prairie, Wet-Mesic Prairie
Kotar:
Forest Cover:

Range: Dane, Fond du Lac, Green, Jefferson, Kenosha, La Crosse, Racine, Rock, Walworth, and Waukesha

Comments:

Phenology: flowers in June and July across its US range

Field Guides:
Britton and Brown, p.3:78/p.3:79
Gleason 1963, p.558
Gleason 1991, p.398
Peterson, p.294