Osmorhiza longistylis (Longstyle Sweetroot) is a species of perennial herb in the family umbellifers. They have a self-supporting growth form. They are native to Canada and The Contiguous United States. They have simple, broad leaves. Flowers are visited by Myolepta varipes, Physoconops sylvosus, Sphegina campanulata, and Trypoxylon clavatum. Individuals can grow to 10 dm.
EOL has data for 19 attributes, including: