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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  Carduus acanthoides L. image
Photographer: Emmet J. Judziewicz           

Botanical Illustration

Clifford Orsted

Hugh H. Iltis

Kenneth J. Sytsma

Kenneth J. Sytsma

Robert Bierman
Family Asteraceae
Carduus acanthoides L.
plumeless thistle, spiny plumeless thistle
Carduus: the classical Latin name for thistle
acanthoides: like the genus Acanthus
  Restricted Invasive - Eradicate!  Stop It symbol- click for definition
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Introduced - naturalized; ecologically invasive
Plant: erect, biennial, 1'-4' tall forb; stems tough, spiny-winged
Flower: head 1/2"-1" wide with pink disk flowers, bracts (phyllaries) spiny; inflorescence an erect, usually a solitary head or in clusters at the ends of the branches and (if present) on a long, winged stalk; blooms July-Oct.
Fruit:4-angled, dry seed with a fluffy, but not feathery pappus
Leaf:deeply lobed to pinnately-divided
Habitat: disturbed sites, roadsides

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

Flora of North America (off site)
There are no synonyms for this taxon.

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