Lomatium nudicaule (Pursh) Coult. & Rose

Lomatium nudicaule (Pursh) Coult. & Rose, Contr. U. S. Nat Herb. 7:238. 1900.
Smyrniiim nudicaule Pursh, Fl. Am. Sept. 196. 1814.
Ferula nudicaulis Nutt. Gen. 1: 183. 1818.
Pastinaca nudicaulis Spreng. in R. & S. Syst. Veg. 6: 587. 1820.
Ferula Nuttallii DC. Prodr. 4: 174. 1830.
Seseli leiocarpum Hook. Fl. Bor. Am. 1: 263. 1832.
Peucedanum latifolium Nutt.; T. & G. Fl. N. Am. 1: 625. 1840. Not P. latifolium DC. 1830.
Peucedanum leiocarpum Nutt.; T. & G. Fl. N. Am. 1: 626. 1840.
Peucedanum leiocarpum var. campestre Nutt.; T. & G. Fl. N. Am. 1: 626. 1840.
Peucedanum nudicaule Nutt.; T. & G. Fl. N. Am. 1: 627. 1840. Not P. nudicaule of later authors.
Peucedanum Nuttallii S. Wats. Bot. King's Expl. 128. 1871. Not Seseli Nuttallii A. Gray, 1870.
Peucedanum robustum Jepson, Ervthea 1: 9. 1893.
Lomatium platvphvllum Coult. & Rose, Contr. U. S. Nat. Herb. 7: 238. 1900.
Cogswellia nudicaulis M. E. Jones, Contr. W. Bot. 12: 31. 1908.
Cogswellia latifolia M. E. Jones. Contr. W. Bot. 12: 31. 1908.
Cogswellia platyphylla Coult. & Rose, Contr. U. S. Nat. Herb. 12: 450. 1909. Plants acaulescent, rarely with 1 cauline leaf, 2.5-7 dm. high, from a long thickened taproot, glabrous; leaves broadly ovate in general outline, excluding the petioles 9-18 cm. long, 1-2-ternate, then pinnate, the ultimate divisions distinct, lanceolate to broadly ovate, entire or toothed and lobed at the apex, 15-90 mm. long, 5-40 mm. broad; petioles 4—25 cm. long, sheathing to above the middle; peduncles exceeding the leaves, swollen at the apex; involucel wanting; rays 10-20, ascending, 1-20 cm. long, somewhat swollen at the apex; pedicels 3-15 mm. long, the umbellets many-flowered; flowers yellow; fruit oblong, 10-14 mm. long, 3-5 mm. broad, the wings narrower than the body; oil-tubes solitary in the dorsal intervals, 1-several in the lateral, 4-7 on the commissure.
Type locality: "On the Columbia River [Rock Fort Camp, at The Dalles]," Oregon, Lewis.
Distribution: Alberta and Idaho to British Columbia, south to western Utah and central