Cirsium undulatum (Nutt.) Spreng.
Wavyleaf Thistle, Plumed Thistle
Asteraceae (Aster Family)
USDA Symbol: CIUN
Wavyleaf Thistle is a member of the aster family (family Asteraceae) which includes herbs, sometimes shrubs or vines, rarely trees, with simple or compound, alternate or opposite leaves. Flowers small, but organized into larger heads resembling a single, radially symmetrical flower cupped by a ring of green bracts. Flower-like heads: tiny, radially symmetrical central flowers form the disk; larger flowers around the edge, the rays, strap-shaped and resembling petals; however, all flowers in one had may be disk flowers or rays.
From the Image Gallery
Bloom InformationBloom Color: Pink
Bloom Time: May , Jun
DistributionUSA: AZ , CA , CO , IA , ID , IL , IN , KS , MI , MN , MO , MT , ND , NE , NM , NV , OK , OR , PA , SD , TX , UT , WA , WI , WY
Canada: AB , BC , MB , SK
Value to Beneficial InsectsSpecial Value to Native Bees
Special Value to Bumble Bees
Provides Nesting Materials/Structure for Native Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
National Wetland Indicator Status
BibliographyBibref 610 - Edible wild plants of the prairie : an ethnobotanical guide (1987) Kindscher, K.
Bibref 1294 - The Midwestern Native Garden: Native Alternatives to Nonnative Flowers and Plants An Illustrated Guide (2011) Adelman, Charlotte and Schwartz, Bernard L.
Bibref 286 - Wildflowers of the Texas Hill Country (1989) Enquist, M.
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Additional resourcesUSDA: Find Cirsium undulatum in USDA Plants
FNA: Find Cirsium undulatum in the Flora of North America (if available)
Google: Search Google for Cirsium undulatum
MetadataRecord Modified: 2015-02-10
Research By: TWC Staff