Cous Biscuitroot

Lomatium circumdatum (S. Wats.) Coult. & Rose, Contr. U. S Nat. Herb. 7: 213. 1900.
Peucedanum circumdatum S. Wats. Proc. Am. Acad. 22: 474. 1887. Cogswellia circumdata M. E. Jones, Contr. W. Bot. 12: 33. 1908.
Plants caulescent, 1.5-3.5 dm. high, from an elongate to subglobose tuber, glabrous to somewhat pubescent; leaves broadly oblong in general outline, excluding the petioles 5-6 cm. long, ternate, then 1-2-pinnate, the ultimate divisions distinct, linear, 6-10 mm. long, 1-2 mm. broad, apiculate; petioles 3-6 cm. long, those of the cauline leaves wholly scarious-sheathing ; peduncles exceeding the leaves; involucel of conspicuous, obovate, acute, prominently nerved, sometimes connate bractlets, much longer than the flowers; rays 7-12, ascending, 2-8 cm. long; pedicels 2-3 mm. long, the umbellets many-flowered; fruit oblong, 6-9 mm. long, 3-4 mm. broad, glabrous, the wings much narrower than the body; oil-tubes solitary in the intervals, 4 on the commissure. Type locality: "Abundant on hillsides in the Wallowa region of eastern Oregon," Cusick. Distribution: Western Idaho to adjacent Washington, southeastern Oregon, and northeastern Nevada (Heller &• Heller 4043, Sandberg, MacDougal &■ Leiberg 21).

Lomatium cous (S. Wats.) Coult. & Rose, Contr. U. S. Nat Herb. 7:214. 1900.
Peucedanum Cous S. Wats. Proc. Am. Acad. 21: 453. 1886. Cogswellia Cous M. E. Jones, Contr. W. Bot. 12: 33. 1908.
Plants acaulescent or short-caulescent, 2-2.5 dm. high, from a globose, sometimes elongate tuber; leaves oblong to obovate in general outline, excluding the petioles 5.5-9.5 cm. long, usually glabrous, ternate, then 2-3-pirmate or pinnately decompound, the ultimate divisions crowded, ovate to oblong, 1-5 mm. long, 1-2 mm. broad, mucronulate; petioles 3-6 cm. long, sheathing to above the middle; peduncles exceeding the leaves, scaberulous; involucel of oblanceolate, shortly connate bractlets, about equaling the flowers; rays 10-20, spreading, 1-5 cm. long, unequal; pedicels 2-4 mm. long, the umbellets about 20-flowered; flowers yellow; fruit oblong-oval, 7-10 mm. long, 3-5 mm. broad, granular-roughened, the wings narrower than the body; oil-tubes usually solitary in the intervals, 4 on the commissure.
Type locality: "John Day's Valley, eastern Oregon," Howell 270.
Distribution: Western Idaho to southeastern Washington and central Oregon (Cusick 1837, Heller &■ Heller 3052).

Lomatium montanum Coult. & Rose, Contr. U. S. Nat. Herb. 7: 214. 1900.
Lomatium purpureum A. Nelson, Bull. Torrey Club 28: 226. 1901. Peucedanum montanum Blankinship, Mont. Agr. Coll. Stud. 1: 93. 1905. Cogswellia montana M. E. Jones, Contr. W. Bot. 12: 34. 1908.
Plants acaulescent, 1-3 dm. high, cespitose from a thickened taproot or a subglobose tuber, glabrous; leaves usually oblong in general outline, excluding the petioles 2.5-12 cm. long, ternate, then 2-3-pinnate, the ultimate divisions crowded, oblong, 2-10 mm. long, 0.5-3 mm. broad, apiculate; petioles 1.5-7 cm. long, sheathing to above the middle, purplish; peduncles exceeding the leaves; involucel of conspicuous, obovate, purplish bractlets, distinct or united below; rays 5-15, spreading, 1-6.5 cm. long, unequal; pedicels 2-3 mm. long, the umbellets about 20-flowered; flowers yellow; fruit oval-oblong, 5-12 mm. long, 3-5 mm. broad, the wings narrower than or about equaling the body; oil-tubes 2-4 in the intervals, 6 on the commissure.
Type locality: "Mountain ridges in Yellowstone National Park," Rose 479. Distribution : Western Montana and Wyoming to northern Idaho and eastern Oregon (Blankin-