Oxypolis rigidior (Stiff Cowbane) is a species of perennial herb in the family Apiaceae. They have a self-supporting growth form. They are native to Eastern North America, North America, The Contiguous United States, and Canada. They have simple, broad leaves. Flowers are visited by Chlorion, Andrena personata, Monogonogastra, and Eupsyche. Individuals can grow to 1.5 m.
EOL has data for 18 attributes, including: