Lomatium greenmanii Mathias

Lomatium greenmanii Mathias, Ann. Mo. Bot. Gard. 25 : 274. 1937.
Plants low, caulescent, 0.5-0.8 dm. high, from a multicipital woody caudex; leaves oblong in general outline, excluding the petioles 1.5-2.5 cm. long, 1-2-pinnate, the ultimate divisions oblong, distinct, 5-10 mm. long, 2-2.5 mm. broad, apiculate, the margins slightly roughened; petioles 1.5-3 cm. long, purplish, sheathing below; cauline leaf 1, much reduced, pinnate; peduncles exceeding the leaves; involucel of a few, filiform, white-scarious bractlets, about equaling the pedicels; umbels reduced to 1-3 fertile umbellets, the rays 1.5-2 mm. long, and 1 or 2 sessile sterile umbellets; pedicels about 1 mm. long, the umbellets few-flowered; flowers white; fruit ovate, 3.5 mm. long, 2 mm. broad, glabrous, the wings much narrower than the body, the dorsal ribs filiform; oil-tubes solitary in the intervals, 2 on the commissure.
Type locality: Wallowa Mountains, head of Keystone Creek, Oregon, 9000 feet, Cusick 2458. Distribution: Known only from the type locality.