190 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
white or yellow flowers; rays 1 to 7.5 em. long; pedicels 2 to 6 mm. 
long; fruit about + mm. long, the carpel irregularly 2 to 5-winged; 
oil tubes | to 3 in the intervals, 2 to + on the commissural side: seed 
face plane, 
Type locality, ‘* Dry hills in the middle mountains,” Colorado; col- 
leeted by Tall & Harbour, no, 222, in 1862; type in Herb. Gray, 
duplicate in U.S. Nat. Herb. 
Mountains of Colorado, Utah, and Nevada, northward to north- 
western Wyoming and Oregon. 
Specimens examined : 
CoLorabo: Type specimens as cited under type locality; Scoville, in 1869; El Paso 
County, Letlerman 220, August 3, 1884; Grays Peak, Patterson 40, July- 
August, 1885; North Cheyenne Canyon, El Paso County, altitude 2,550 
meters, August 6, 1892; Red Cliff, altitude 2,400 meters, Bethel, July 2, 1894. 
Wyomina: Fort Steele, Ne/sou 4803, June 18, 1898; Teton Mountains, lt. 2, 
Nelson 6507, August 16, 1899, 
Uran: Alta, Wasatch Mountains, altitude 3,750 meters, Jones 5677, July 25, 1894, 
Nevapa: Kast Hnmboldt Mountains, altitude 2,400 meters, Watson 453, August, 
1868. 
+. Pseudocymopterus hendersoni (. & R.,sp. nov. 
Acaulescent, cespitose, the caudex clothed with old leaf sheaths and 
petioles; leaves on short petioles, very pale, narrow in outline, pin- 
nate; the pinnae somewhat ovate in outline, but deeply cleft into 3 to 
5 linear entire segments; peduncles longer than leaves, 3 to 5 em. long; 
umbels small, compact; rays 4 to 6,3 to 5 mm. lone; pedicels short; 
involucel of linear entire bractlets; fruit immature, 
Type locality, mountain peak near source of Mill Creek, Idaho, alti- 
tude 3,740 meters; collected by //enderson, no. 4068, August 21, 1895; 
type in U.S. Nat. Herb. 
Mountains of Idaho. 
Specimens examined : 
Ipano: Type specimens as cited under type locality. 
This species is nearest P. anisatus, but has very different foliage. 
4, Pseudocymopterus bipinnatus (Watson) C. & R. Rev. N. Am. Umbell. 
75, 188s. 
Cymopterus bipinnatus Watson, Proe. Am. Acad. 20: 368, 1885. 
Cespitose, the short branches of the rootstock covered with the 
crowded remains of dead leaves. glaucous, puberulent; leaves pinnate 
with few pairs of short segments, which are pinnately divided into 
short linear lobes; peduncles 1 to 2 dm. high, much exceeding the 
leaves; rays 2 to 8 mm. long; involucels of conspicuous linear-lanceo- 
late or broader bractlets, with hyaline margins, and more or less united 
at base; flowers white; fruit nearly sessile, ovoid, 3 to 4 mm. long, 
moderately flattened dorsally, the 5 thickish carpel wings equal and 
narrow (often being but very prominent acute ribs); oil tubes 3 or 4 
