Lomatium cusickii (S. Wats.) Coult. & Rose

Lomatium cusickii (S. Wats.) Coult. & Rose, Contr. U. S. Nat Herb. 7:226. 1900.
Peucedanum Cusickii S. Wats. Proc. Am. Acad. 21: 453. 1886. Cogswellia Cusickii M. E. Jones, Contr. W. Bot. 12: 32. 1908. Cogswellia brecciarum M. E. Jones, Contr. W. Bot. 12: 37. 1908. Cogswellia altensis M. E. Jones. Bull. Univ. Mont. Biol. 15: 41. 1910. Cynomaralhrum brecciarum Rydb. Fl. Rocky Mts. 630, 1064. 1917.
Plants caulescent, 1-2.2 dm. high, cespitose, from a long, slender, fusiform taproot; leaves obovate to elliptic in general outline, excluding the petioles 3.5-12 cm. long, glabrous to slightly scaberulous, ternately compound, the leaflets few, filiform to linear, 6-75 mm. long, 0.5-2 mm. broad, apiculate; petioles 1-9 cm. long, sheathing, purplish; peduncles exceeding the leaves, glabrous; involucel of filiform to linear-acuminate, scarious-margined bractlets, about equaling the flowers; rays 5-12, 1-3.5 cm. long, unequal; pedicels 2-6 mm. long, the umbellets about 10-flowered; flowers white or purplish; fruit oblong, 1 1-13 mm. long, 4—6 mm. broad, glabrous, the wings about equaling the body; oil-tubes 1-3 in the intervals, 5 on the commissure.
Type locality: "On the highest summits of the Eagle Creek [Wallowa] Mountains, Union County, Oregon," Cusick.
Distribution: Mountains, western Montana to northeastern Oregon, 6000-9300 feet (Cusick 3335, Piper 2333).

Lomatium cusickii (Cusick's biscuitroot) is a perennial herb of the family Apiaceae. Its range is in the Northwestern United States. Its native habitats include well-drained meadows, ridges, slopes, and conifer forests.