78 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Type locality, *‘ plains of the Upper Platte, near the Rocky Moun- 
tains;” collected by Wuttall; type in Herb. Philad. Acad. 
From Assiniboia to Montana, Black Hills of South Dakota, and 
Colorado. 
Specimens examined: 
AssINIBOIA: Moose Jaw, Macoun 10659, May 19, 1895. 
Montana: Grasshopper Valley, Watson 154, July 25, 1880; near Helena, Kelsey, 
May 21, 1888; Blankinship 25, May 4, 1890; near Red Lodge, Rose 8, July 24, 
1893; Pole Creek, Rydberg 4615, July 4, 1897. 
Wyomina: Alden; Yellowstone Park, Tweedy 853, June, 1885; Laramie, Nelson 10, 
May 7, 1894, 
Soutn Dakota: Black Hills, Forwood 144, June 9, 1887. 
CoLorapo: Hall & Harbour 214, in 1862; plains, Vesey, in 1868; Apex, Wolf 726, 
in 1873; foothills, altitude 1,800 meters, Cowen 185, May 11, 1895. 
3. Musineon tenuifolium Nutt. in Torr & Gray, Fl. 1: 642. 1840. 
Fig. 13. 
Acaulescent, somewhat cespitose, glaucous; leaves tripinnatifid, with 
narrowly linear segments; peduncles much longer than the leaves, 
1 to 2 dm. long; umbel 12 to 20-rayed; fruit nearly glabrous, 3 to 
4 mm. long; oil tubes large, 2 or 3 in the intervals. 
Type locality, ** Rocky Mountains,” collected by Vuttall; type in 
Herb. Philad. Acad. and Herb. Columbia Univ. 
Western Nebraska, western South Dakota, and Wyoming. 
Specimens examined: 
Nepraska: Dawes County, altitude 1,380 meters, Bessey, June 29, 1889; Sioux 
County, Webber, August 2, 1889; War Bonnet Canyon, altitude 1,560 meters, 
Williams 308, June 28,1890; Cheyenne County, Rydberg, July 4, 1891; Scotts 
Bluff County, Rydberg, July 6, 1891, 
Sourn Dakora: Black Hills, Forwood 146, May 5, 1887; same region, altitude 
1,050 to 2,100 meters, Rydberg 718, June 1892, 
Wyomine: Laramie Hills, Nelson 176, June 7, 1894; Lusk, Anowlton 108, June 
28, 1896; Laramie and Albany counties, Nelson 2878, 3168, in 1897. 
4. Musineon vaginatum Rydberg, Mem. N. Y. Bot. Garden1: 288, 
1900. 
‘*Stem less than 1 dm. high, from a thick perennial root, glabrous, 
striate, more or less purple-tinged, 2 to 3-leaved; basal leaves with 
petioles about 5 cm. long, twice or thrice ternate, with stalked divi- 
sions (stalk of the terminal one longest), glabrous; divisions divided 
into linear or linear-oblong obtuse segments about 5 mm. long; stem 
leaves similar, short petioled, and with a very conspicuous purple and 
scarious-margined sheath; umbel | to 2 cm. in diameter, with several 
rays; involucre none; involucels of linear bracts nearly as long as the 
pedicels; sepals evident; petals white or sometimes yellowish; mature 
fruit not seen; young fruit with strong angles, but no wings, a little 
compressed laterally; oil tubes apparently 3 in the intervals; seed face 
plane; stylopodium depressed.” 
