COULTER AND ROSE—NORTH AMERICAN UMBELLIFERAE. 145 
High mountains of Colorado and extending into Utah. 
Specimens examined : 
CoLorapo: Wolf 731, in 1873; type specimens as cited under type locality; Grays 
Peak, altitude 3,300 to 4,200 meters, Patterson 39 (small form), August, 1885; 
same station, altitude 3,990 meters, Crandall, July 18, 1892; Flat Top Moun- 
tains, altitude 2,700 meters, and Leadville Mountains, altitude 3,300 meters, 
Bethel, July, 1894; Cameron Pass, altitude 3,600 meters, Crandall 27, July 5, 
1894; near Leadville, Osterhout, June, 1895; mountains above Boreas, alti- 
tude 3,600 meters, Cowen 186, August 2, 1895; near Veta Pass, Rydberg, June 
20, 1900. 
Uran: Mount Ellen, Henry Mountains, altitude 3,300 meters, Jones 5669, July 
25, 1894; Bromide Pass, Henry Mountains, altitude 3,000 meters, Jones 5695, 
July 27, 1894; near Fish Lake, altitude 2,700 meters, Jones 5826, August 11, 
1894. 
We have seen no specimens of this from Pikes Peak, where O. humilis especially 
abounds, but it extends over the western mountains and into Utah. 
We have excluded certain larger forms, with very different foliage, which have 
been distributed as O. humilis (Cymopterus alpinus). In the absence of fruit their 
relationship can not be determined. If they belong to Oreovis the genus certainly 
contains one or two additional species and has a more extended range. The excluded 
sheets are as follows: Arizona, Palmer 40, in 1869; Fort Wingate, N. Mex., Marsh 22, 
May 25, 1883; Grays Peak, Patterson 39 (large form), August, 1885. 
45. THASPIUM Nutt. Gen. 1: 196. 1818. 
Calyx teeth conspicuous. Fruit ovoid to oblong, slightly flattened 
dorsally if at all, mostly glabrous. Carpel with 3 or 4 or all the 
ribs strongly winged. 
Stylopodium wanting; 
styles long. Oil tubes 
solitary in the intervals, 
2 on the commissural 
side. Seed sulcate be- 
neath the oil tubes, 
almost terete or some- 
what dorsally flattened, 
with plane face. 
Perennials (6to15dm. 
high), with ternately 
compound leaves (divi- 
sions sometimes  pin- 
nate) and broad serrate or toothed leaflets (or lower leaves simple), 
mostly no involucre, involucels of small bractlets, mostly yellow flow- 
ers, and all the fruits pedicelled. 
First species cited, Zhaspium aureum Nutt. 
A genus of 3 species belonging to eastern North America. 
Fic. 47.—Thaspium trifoliatum: a, b, x 8. 
Basal leaves simple or once ternate..........----.-.------------- 1. T. trifoliatum. 
Basal leaves twice or more ternate or pinnate. 
Leaflets ovate, serrate to lanceolate.......2.2..... ...2-2-------- 2. T. barbinode. 
Leaflets pinnately cut into linear or oblong lobes............. 3. T. pinnatifidum. 
