Sium suave (Hemlock Waterparsnip) is a species of perennial herb in the family Apiaceae. They have a self-supporting growth form. They are native to The Contiguous United States, Canada, and Alaska. They have simple, simple leaves. Flowers are visited by Eupsyche, Eurytoma, Myrmosa, and Ageniella.
EOL has data for 14 attributes, including: