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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  Cirsium hillii (Canby) Fernald image
Photographer: Mark Mittelstadt           

Botanical Illustration

Kitty Kohout

Merel R. Black

Josh Sulman

Thomas A. Meyer
Family Asteraceae
Cirsium hillii (Canby) Fernald
Hill's thistle, hollow-rooted thistle, prairie thistle
Cirsium: derived from the Greek kirsion, "a kind of thistle;" also cirsos meaning "a swollen vein" for which thistle was once a remedy
hillii: for Ellsworth Jerome Hill (1833-1917)
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Threatened
Plant: erect, biennial/(perennial?), 1'-3' tall, spiny, sweet smelling forb with thick, hollow roots
Flower: head 1 1/2"-2" wide with purple disk flowers; inflorescence usually solitary or a few heads; blooms June-Aug.
Fruit:dry seed on fluffy, feathery-divided pappus
Leaf:basal leaves often edged with red and in a large, persistent rosette
Habitat: sun; prairies; in sandy soil

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

Flora of North America (off site)
Cirsium pumilum (Nutt.) Spreng. subsp. hillii (Canby) R.J.Moore & Frankton
Cirsium pumilum (Nutt.) Spreng. var. hillii (Canby) B.Boivin
Cnicus hillii Canby

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