COULTER AND ROSE—-NORTH AMERICAN UMBELLIFERAE, 223 
Souta Dakora: Black Hills, near Fort Meade, Forwood 145, May 6, 1887; Black 
Hills, Hot Springs, Rydberg 728, June 15, 1892; Alkali Creek, V. Bailey 18, 
June 3. 1894. 
Nepraska: “ Plains of the Platte,’’ Nuttall (type of Nuttall’s Peucedanum villosum). 
Kansas: Onaga, Creveceur, June 5, 1893. 
Texas: Eagle Pass, Havard. 
24. Lomatium vaginatum CU. & R., sp. nov. 
Short, caulescent, from an elongated more or less thickened root, 3 to 
4dm. high, often spreading from the base, somewhat scabrous through- 
out; leaves rather broad, ternate then once to twice pinnate, ultimate 
segments short and obtuse, often more or less confluent; petioles a large 
inflated purple sheath; umbels somewhat unequal, 5 to 12-rayed, with 
a single involucral bract, and involucels of numerous linear elongated 
acuminate bractlets: rays 2 to 6 cm. long; pedicels + to 7 mm. long; 
flowers pale vellow; fruit broadly oblong, somewhat scabrous, 8 to 10 
mm. long, with wings nearly as broad as body; oil tubes large, 2 or 3 
in the intervals. 
Type locality, Logan Valley, Union County, Oreg.; collected by W.C. 
Cusick, no. 1697; type in U.S. Nat. Herb. 
Eastern Oregon. 
Specimens examined: 
OrEGON: Type specimens as cited under type locality; near Grizzly Butte, Crook 
County, altitude 1,425 meters, Leiberg 234, June 14, 1894; Malheur Divide, 
Leiberg 2160, May 30, 1896; near Beulah, Malheur County, Leberg 2293, June 
17, 1896. 
CaLiroRNIA: Yreka, Siskiyou County, Greene 788, May 15, 1876. 
Mr. Cusick has distributed this species as Peucedanum donnellii, but the fruit wings 
are broader than in that species. 
25. Lomatium marginatum (Benth.) C. & R. 
Peucedanum margmatun Benth, Pl. Hartw. 312. 1849. 
Tall (at least 3 dm. high) and somewhat caulescent, glabrous; leaves 
large, much compounded into long linear segments: fruiting rays few, 
much elongated, 5 cm. long: pedicels slender, 10 to 12 mm, long; 
involueral bracts linear, elongated, acuminate, somewhat scarious 
margined; fruit immature, elliptical oblong, glabrous. 
Type locality, ‘tin valle Sacramento;” collected by L/artweg, no. 
1752, duplicate in Herb. Gray. 
Central California. 
Specimens examined: 
CALIFORNIA: Type specimens as cited under type locality. 
Brewer’s no. 4536 (1865), from the banks of the American River, California, must 
be very near this species. The only striking difference is the much smaller bractlets. 
In the Botany of California Peuwcedanum marginatum is referred to P. caruifolium, 
where it has ever since remained. A careful comparison of the Douglas plant, which 
is the type of the former, and the Hartweg plant, which is the type of the latter, 
convinces us that the two are very distinct. ?. imarginatim is a much stronger piant, 
with very different bractlets, longer pedicels, and doubtless larger fruit, etc. No 
