2012 Keir Morse   cc-by-nc-sa-3.0

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

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EOL has data for 14 attributes, including:

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