Syn.: Ferula macrocarpa Hook. et Arn., Lomatium macrocarpum (Nutt. ex Torr. et A. Gray) J. M. Coult. et Rose, Peucedanum macrocarpum Nutt. ex Torr. et A. Gray
Family: Apiaceae Lindl.
Cogswellia macrocarpa
Distribution: Species of the west of North America. Found from British Columbia to central California and to the east to the Dakotas.
Ecology: Grows on dry and rocky slopes, from sea level to almost 2200 m of elevation.
Cogswellia macrocarpa
Description: Perennial herb, 10–30(–50) cm tall, from thick vertical rootstock. Stem leaning or prostrate, branching from base, with dense gray hairs, later bare. Leaves are basal, with stalks, 3 times divided, 3–12 cm long, the largest ones up to 9 mm long and 2 mm wide, hairy, gray green, leaf sheaths are long, whitish or reddish. Inflorescence is an umbel, terminal, 2–6 cm across, petioles often uneven, bracts lanceolate, quite long, corollas white to reddish white. Fruits are schizocarps, flat, elliptical, 7–20(–28) mm long, smooth with whitish ribs.
Cogswellia macrocarpa
Cogswellia macrocarpa
Cogswellia macrocarpa
These images were taken in Canada, Alberta, Calgary, Edworthy Park (May 2013).