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Cup plant: a hulking prairie perennial

August 11, 2009
By AMY IGNATUK, The Nature Conservancy Intern

Native to tall grass prairies in the western and southwestern United States, the cup plant, Silphium perfoliatum, or cupleaf rosinweed, is a plant out of place in this region. Introduced as an herbaceous ornamental, it escaped the garden and is quickly becoming a species of concern, invading river corridors throughout the Ausable River watershed.



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