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Cirsium undulatum var. undulatum
Cirsium undulatum (Nutt.) Spreng. var. undulatum
Wavyleaf Thistle, Gray Thistle, Pasture Thistle
Asteraceae (Aster Family)
Synonym(s): Carduus helleri, Carduus undulatus, Cirsium helleri, Cirsium megacephalum, Cirsium ochrocentrum var. helleri, Cirsium undulatum var. megacephalum, Cnicus undulatus var. megacephalus
USDA Symbol: CIUNU
USDA Native Status: L48 (N), CAN (N)
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Plant Characteristics
Duration: Annual , BiennialHabit: Herb
Size Notes: Up to about 7 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom Information
Bloom Color: White , Pink , PurpleBloom Time: May , Jun , Jul , Aug , Sep , Oct
Bloom Notes: No ray florets present, only disc florets.
Distribution
USA: AZ , CA , CO , GA , IA , ID , IL , IN , KS , MI , MN , MO , MT , ND , NE , NM , NV , OK , OR , PA , SD , TX , UT , WA , WI , WYCanada: AB , BC , MB , SK
Web Reference
Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.Additional resources
USDA: Find Cirsium undulatum var. undulatum in USDA PlantsFNA: Find Cirsium undulatum var. undulatum in the Flora of North America (if available)
Google: Search Google for Cirsium undulatum var. undulatum
Metadata
Record Modified: 2018-12-11Research By: CBR