Day Valley Desertparsley

Lomatium minus (Rose) Math. & Const. Bull. Torrey Club 69: 246. 1942.
Leptotaenia minor Rose; Howell, Fl. NW. Am. 1: 251. 1898. Cusickia minor M. E. Jones, Contr. W. Bot. 12: 40. 1908.
Plants short-caulescent, 1.5-3 dm. high, from stout thickened roots bearing a caudex clothed with a few scarious, dilated, bladeless sheaths, glabrous; leaves ovate in general outline, excluding the petioles 5-12 cm. long, ternate, then 2-4-pinnate, the ultimate divisions linear to filiform, 1-3 mm. long, about 1 mm. broad; petioles 4—5 cm. long, broadly sheathing at the base; cauline leaves like the basal, short-petiolate, the sheaths conspicuous; peduncles stout and somewhat inflated, exceeding the leaves; involucel of several linear, acute, scarious bractlets, shorter than the flowers; rays 6-9, stout, spreading, 2-6 cm. long, subequal; pedicels 4-14 mm. long, the umbellets about 10-flowered; flowers light purple; fruit oblong-oval, 12-16 mm. long, 5-7 mm. broad, glabrous, the wings much narrower than and homochromous with the body, slightly corky-thickened; oil-tubes large, solitary in the intervals, 3 or 4 on the commissure.
Type locality: Near Rock Creek, Morrow County, "John Day Country," Oregon, Leiberg 98. Distribution: Central to southeastern Oregon (Cusick 2373).