Lomatium nuttallii (A. Gray) Macbr.

Lomatium megarrhizum (A. Nelson) Mathias, Ann. Mo. Bot
Gard. 25; 282. 1937.
Musenium tenuifolium sensu Hook. Lond. Jour. Bot. 6: 237. 1847. Not M. tenuifolium Nutt.
1840.
Peucedanum megarrhiza A. Nelson, Bull. Torrey Club 26: 130. 1899.
Cynomarathrum megarrhizum Rydb. Fl. Rocky Mts. 629, 1064. 1917.
Plants acaulescent, 1-3 dm. high, clustered from a broad, semiwoody, deep-seated root, the caudex multicipital, broadly eespitose, the branches numerous, crowded, thickly clothed with old leaf-sheaths, glabrous; leaves few to several from each crown, rigidly erect, linearoblong in general outline, excluding the petioles 5.5-9.5 cm. long, pinnate, the leaflets in 2-5 remote pairs, 1 1-25 mm. long, about 1 mm. broad, entire and narrowly linear and cuspidate to irregularly and remotely pinnatifid, the lobes few, linear, 1-10 mm. long, 1 mm. broad, cuspidate; petioles 4.5-8 cm. long, shortly sheathing below; peduncles equaling or shortly exceeding the leaves; involucel of subdimidiate, linear, acute to short-acuminate bractlets, connate below, longer than the pedicels; rays 10-11, spreading to reflexed, 0.8-2.3 cm. long, subequal; pedicels 1-2 mm. long, spreading to reflexed, the umbellets about 20-flowered; flowers yellow; fruit oblong, 5-8 mm. long, 2.5-3 mm. broad, the wings narrower than the body; oil-tubes about 3 in the intervals, 6-10 on the commissure.
Type locality: Point of Rocks, Wyoming, A. Nelson 4769.
Distribution: Southwestern Wyoming (Nelson 7080. Payson &■ Payson 2596).

Lomatium nuttallii (A. Gray) F. Macbr. Contr. Gray Herb. 56: 35. 1918.
Seseli Nuttallii A. Gray, Proc. Am. Acad. 8: 287, in part. 1870.
Cynomaralhrum saxalile Nutt.; A. Gray, Proc. Am. Acad. 8: 287, as syn. 1870.
Peucedanum graveolens S. Wats. Bot. King's Expl. 128. 1871. Not P. graveolens Benth. & Hook.
1867. Peucedanum Kingii S. Wats. Proc. Am. Acad. 22: 474. 1887. Cynomaralhrum Nuttallii Coult. & Rose, Contr. U. S. Nat. Herb. 7: 245. 1900. Cogswellia Nuttallii M. E. Jones, Contr. W. Bot. 12: 32. 1908.
Plants acaulescent, 1.5-4.2 dm. high, from a multicipital, subwoody caudex covered with old leaf-sheaths, glabrous; leaves oblong in general outline, excluding the petioles 5.5-13 cm. long, 1-2-pinnate or ternateor quinate-pinnate, the ultimate divisions remote, linear, 10-50 mm. long, 1-2 mm. broad, entire, cuspidate; petioles 3-15 cm. long, shortly sheathing below; peduncles stout, usually greatly exceeding the leaves; involucel of distinct or shortly connate, linear, acute to acuminate bractlets, entire or once-lobed near the base, longer than or equaling the flowers, sometimes reflexed; rays 5-16, erect to suberect, 1.5-4.3 cm. long; pedicels 3-7 mm. long, suberect, the umbellets 15-20-flowered; flowers yellow; fruit narrowly oblong, 9-13 mm. long, 3-4 mm. broad, the wings about one-half the width of the body; oil-tubes 3-5 in the intervals, 6-10 on the commissure.
Type locality: "Rocky Mountains," Nuttall.
Distribution: Southwestern Wyoming to eastern Nevada, south to northwestern New Mexico; one collection from Nebraska. (Payson b" Payson 2707, 4887.)

Neoparrya megarrhiza es una especie de planta herbácea perteneciente a la familia de las apiáceas. Se encuentra en Estados Unidos.

Lomatium nuttallii là một loài thực vật có hoa trong họ Hoa tán. Loài này được (A. Gray) J.F. Macbr. mô tả khoa học đầu tiên năm 1918.