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

Lomatium nevadense (S. Wats.) Coult. & Rose, Contr. U. S
Nat. Herb. 7: 220. 1900.
Peucedanum nevadense S. Wats. Proc. Am. Acad. 11: 143. 1876.
Peucedanum nevadense var. cupulalum M. E. Jones, Contr. W. Bot. 8: 29. 1898.
Lomatium nevadense var. cupulalum Coult. & Rose, Contr. U. S. Nat. Herb. 7: 221. 1900.
Cogswellia nevadensis M. E. Jones, Contr. W. Bot. 12: 33. 1908.
Cogswellia nevadensis var. cupulata M. E. Jones, Contr. W. Bot. 12: 33. 1908. Plants acaulescent or short-caulescent, 1-4.5 dm. high, from a long slender taproot or a deep-seated tuber, pubescent; leaves oblong to obovate in general outline, excluding the petioles 5-6 cm. long, tripinnate, the ultimate divisions crowded, oblong, 2-3 mm. long, about 1 mm. broad, apiculate; petioles 4-6 cm. long, sheathing to above the middle, purplish; peduncles exceeding the leaves; involucel of conspicuous, linear and distinct or obovate and connate, scarious-margined bractlets, about equaling the flowers; rays 8-22, spreading, 1-2.5 cm. long, unequal; pedicels 3-10 mm. long, the umbellets about 20-flowered; flowers white; fruit ovate to oblong-obovate, 6-8 mm. long, 4-6 mm. broad, puberulent, the wings narrower than the body; oil-tubes 2-9 in the intervals, 4-12 on the commissure.
Type locality: "Very frequent in western Nevada from the Washoe to the West Humboldt Mountains." 4500-6000 feet, Watson 469.
Distribution: Western Utah to central Oregon, south to southern Arizona and California, mostly east of the Sierra Nevada (Heller 10,243, Jones 3880).
32a. Lomatium nevadense var. Parishii (Coult. & Rose) Jepson, Madrono 1: 156. 1924.
Peucedanum Parishii Coult. & Rose, Bot. Gaz. 13: 209. 1888. Lomatium Parishii Coult. & Rose, Contr. U. S. Nat. Herb. 7: 235. 1900. Cogswellia nevadensis var. Parishii M. E. Jones, Contr. W. Bot. 12: 33. 1908. Cogswellia decipiens M. E. Jones, Contr. W. Bot. 12: 38. 1908. Cogswellia Parishii Coult. & Rose, Contr. U. S. Nat. Herb. 12: 450. 1909.
Usually higher; leaf-divisions sometimes elongate, up to 35 mm. long; involucel sometimes reduced to a sheath, or a single bractlet; rays usually longer, 1.5-5.5 cm. long; pedicels 3-12 mm. long; ovaries glabrous; fruit 7-10 mm. long, 3-6 mm. broad, glabrous; oil-tubes 1-4 in the intervals, 4-7 on the commissure.
Type locality: Bear Valley, San Bernardino Mountains, California, Parish 1828. Distribution: Southeastern Oregon and adjacent Nevada to western New Mexico, Sonora, and southeastern California (Jones 5072f, Purpus 5288).

Lomatium nevadense is a species of flowering plant in the carrot family known by the common name Nevada biscuitroot. It is native to the western United States and northern Mexico, where it is known from several different habitat types, including sagebrush and woodlands. It is a perennial herb growing up to about 45 centimeters tall from a taproot. The leaves are up to about 16 centimeters long, their blades divided into many oblong pointed segments. The inflorescence is an umbel of white or cream flowers.