2012 Keir Morse   cc-by-nc-sa-3.0

Aristida (Threeawn) is a genus of herb in the family true grasses. They are native to U.S. Virgin Islands, Eastern North America, Puerto Rico, The Contiguous United States, and Canada. Individuals can grow to 1.7 m.

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EOL has data for 13 attributes, including:

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