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Bransford, W.D. and Dolphia
Cirsium undulatum (Nutt.) Spreng.
Wavyleaf thistle, Plumed Thistle
USDA Symbol: ciun
USDA Native Status: L48 (N), CAN (N)
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.
Plant CharacteristicsDuration: Biennial Habit: Herb Flower:
Fruit: Size Class:
Bloom InformationBloom Color: Pink
Bloom Time: May , Jun
, WY Canada: AB
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
Record Last Modified: 2012-12-07
Research By: TWC Staff