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OAC-BIO Herbarium. University of Guelph, Canada. Year: 2012.   cc-by-nc-sa-3.0

Asclepias quadrifolia (Fourleaf Milkweed) is a species of perennial herb in the family Apocynaceae. It is listed as endangered by COSEWIC. It is native to Canada and the contiguous United States. Fourleaf Milkweed is a photoautotroph.

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EOL has data for 9 attributes, including:

Known occurrences, collected specimens and observations of fourleaf milkweed. View this species on GBIF