Osmorhiza aristata is
a biennial herb of 30-70cm in height found on roadsides or in
wastelands, leaves are of a bi- to tri-pinnate compound leaf, and
the leaflets are egg-shaped lanceolate, finely cleft, with coarse,
short hairs on both sides. Branch tips emerge, and small umbels and
small white flowers set themselves in them with 4-10 pedicels.
Involucral bracts are slender. Bloom time: May-July.