Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Prenanthes aspera Michx. image
Photographer: Kenneth J. Sytsma           

Kitty Kohout

Kenneth J. Sytsma
Family Asteraceae
Prenanthes aspera Michx.
rough rattlesnake-root, rough white-lettuce
Prenanthes: from prenes for "drooping" and anthe for "blossom"
aspera: Latin for "rough" or "harsh" from coarse nature of leaves
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Endangered
Plant: erect, perennial, 2'- 5 1/2' tall forb with milky juice; stems usually with rough hairs
Flower: head 1/2" wide, with cream ray flowers, bracts (phyllaries) densely hairy; inflorescence with mostly erect heads in dense, long, narrow clusters; blooms Aug.-Sept.
Fruit:dry seed with yellowish, fluffy pappus
Leaf:alternate, rough especially below, lower leaves tapering to the stalk and falling off early, upper mostly stalkless to clasping
Habitat: dry; prairies

More Information Natural Communities Herbarium Specimens
All Prenanthes list Google- Images or Text

Flora of North America (off site)
Nabalus asperus (Michx.) Torr. & A.Gray

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