COULTER AND ROSE—-NORTH AMERICAN UMBELLIFERAE. 191 
in the intervals, 6 to 8 on the commissural side; seed face slightly con- 
cave. 
Type locality, ‘tin the Rocky Mountains, south of Virginia City, 
Montana;” collected by //ayden, in 1871 (distributed as Cymopterus 
Joeniculaceus); type in Herb. Gray. Also associated with type in 
original description; **ona ridge above Bannock City, southwest Mon- 
tana,” Watson, in L880; **on Mount Helena, Montana,” Canby, in 1883. 
In the mountains of western Wyoming, Montana, Idaho, and 
Oregon. 
Specimens examined: 
Wryomine: Monida, .f. & 7. Nelson 5411, June 16, 1899. 
Montana: Ridges above Bannock, altitade 2,100 meters, Watson 158, July 19, 
1880; Mount Ilelena, Canby 148, July 6, 1883; same station, Williams 516, 
April 50, 1886; same station, Aelsey 153, May-June, 1887 and 1888; Tweedy, 
June, 1888; Pole Creek and Cedar Mountain, Rydberg 4628, 4629, 4630, July 
4-16, 1897. 
Ipano: Mountain top near Challis, altitude 2,400 meters, /Zenderson 3810, 
August 3, 1895. 
OreEGoN: Steins Mountains, Cusick 2040a, July 15, 1898. 
Kelsey 133 of US87 and Tireedy of 1888 differ from the ordinary forms of the species 
in having glabrous leaves, with narrow and longer leaf segments. 
Cymopterus nivalis Watson, Bot. King Sury. 123. 1871, collected by Watson (no. 
448), has not been collected since, and on account of absence of fruit and general 
insufliciency of material can not be definitely placed. The testimony at hand, how- 
ever, suggests that it may be congeneric with Pseudocymoplerus bipinnatus. The type 
locality is given as ‘Kast Humboldt Mountains, [N.] Nevada, 9,000 to 10,000 feet 
altitude,’’ the material being collected July, 1868, 
55. POLYTAENIA DC. Coll. Mém. 5: 53. 1829, 
Calyx teeth conspicuous. Fruit obovate to oval, much flattened 
dorsally, glabrous. Carpel with 
dorsal and intermediate — ribs 
small or obscure in the depressed 
often corky back; laterals form- 
ing broadand usually thick corky 
wings closely contiguous to those 
of the other carpel and forming 
the margin of the fruit.  Stylo- 
podium wanting. Oil tubes 12 
to 18 about the seed (4 to 6 on the 
commissural side) and many scat- 
tered through the thick corky Fic, 57.—Polytaenia nuttallii: a, b, «4. 
pericarp, which also contains 5 
small bundles of strengthening cells. Seed section oval or much 
flattened. 
Perennial mostly glabrous herbs, with twice pinnate leaves, no invo- 
lucre, involucels of narrow bractlets, and bright yellow flowers. 
A monotypic genus of the Mississippi Basin. 
