Great Basin Desertparsley

Lomatium simplex (Nutt.) F. Macbr. Contr. Gray Herb. 56:
34. 1918.
Peucedanum triternatum* var. 1 plalycarpum Torr. in Stansb. Expl. Utah 389. 1852.
Peucedanum simplex Nutt.; S. Wats. Bot. King's Expl. 129. 1871.
Lomatium platycarpum Coult. & Rose, Contr. U. S. Nat. Herb. 7: 226, in part. 1900.
Cogswellia platycarpa M. E. Jones. Contr. W. Bot. 12: 32. 1908.
Cogswellia simplex M. E. Jones, Bull. Univ. Mont. Biol. 15: 41. 1910.
Plants caulescent or acaulescent, 2-6 dm. high, clustered from a long slender taproot, the stems usually simple, few-leaved, densely puberulent; leaves obovate in general outline, excluding the petioles 1 1-20 cm. long, biternate, the ultimate divisions linear, acute, 25-1 15 mm. long, 3-6 mm. broad, glabrous above, glabrous to densely puberulent below; petioles 6-14 cm. long, sheathing to near the middle, glabrous to puberulent ; involucel of linear or filiform, acute to acuminate, glabrous or puberulent bractlets, shorter than the pedicels; rays 8-17, spreading to ascending, 1.5-5.8 cm. long, unequal; pedicels 1-9 mm. long, the umbellets 10-30-flowered;
* "citernatum," an orthographic error. flowers yellow; fruit broadly oblong to suborbicular, 7-14 mm. long, 7-10 mm. broad, glabrous, the wings broader than the body; oil-tubes solitary in the intervals, 2 on the commissure.
Type locality: "Rocky Mountains," Nultall.
Distribution: Western Montana to central Washington, south to southwestern Colorado, Utah, and central Oregon {Macbride 1722, Payson & Payson 4866).