Comarum palustre (Purple Marshlocks) is a species of perennial herb in the family Rosaceae. They have a self-supporting growth form. They are native to The Contiguous United States, Saint-Pierre Et Miquelon, Alaska, Canada, North America, and Greenland. They have simple, broad leaves. Flowers are visited by Maniola jurtina, Andrena tarsata, Halictus tumulorum, and Polyommatus icarus. Individuals can grow to 0.46 m.
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