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Cirsium muticum

Common Name(s):
Marsh thistle, Swamp thistle
Category:
Wildflowers
Comment:

Basal leaves form during the first year, followed by flowering plant in the second year.

Wildlife Value:  Members of the genus Cirsium support the following specialized beesMelissodes (Heliomelissodes) desponsusOsmia (Helicosmia) chalybea and Osmia (Helicosmia) texana.

Season:
Summer into fall
Height:
2-8 ft.
Foliage:
Rosette of long-stalked, deeply incised leaves up to 16 inches long; alternate; pinnately cut into broad prickly segments; webby beneath
Flower:
Rose-purple, clustered flower heads 1.25-2 inches wide; hollow flowering stem; sticky bracts are not tipped with spines
Site:
Swamps, wet woods, thickets; sandy soil
Life Cycle:
Biennial
Tags:
nectar, pollinator, specialized bees, bees, wildlife

NCCES plant id: 2526

Cirsium muticum Cirsium muticum basal leaves
Superior National Forest, CC BY - 2.0
Cirsium muticum Cirsium muticum bloom stalks
Wisconsin Dept of Natural Resources, CC BY-ND-2.0
Circium muticum Cirsium muticum flower
Joshua Mayer, CC-BY-SA-2.0