144 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
tose, from a somewhat slender elongated root; leaves pinnate, the 
leaflets cut into 3 to 7 linear-lanceolate segments; peduncles 2 to 7.5 
em. high; umbels few-rayed, with involucels of linear distinct bract- 
lets; flowers bright yellow; fruit 8 to 4 mm. long; oil tubes 2 or 3 
(rarely 1) in the intervals. 
Type locality, ‘* Rocky Mountains;” collected by J/umes, no. 179, 
in 1820; type in Herb. Columbia Univ. 
Summits of high mountains, Colorado, chiefly in the region of Pikes 
Peak. 
Specimens examined: 
Cotorapo: Pikes Peak, altitude 3,900 meters, Letterman 223, August 13, 1884; 
same station, altitude 4,200 meters, Sheldon 311, August 28, 1884; same sta- 
tion, Alice Eastwood, July, 1892; same station, Canby, August 27, 1895; same 
station, altitude 3,600 to 4,200 meters, folzinger 9, June 7, 1896; same station, 
Knowlton 20, June 14, 1896; Bear Creek Divide west of Mount Hesperus, 
altitude 3,300 meters, Baker 228, June 29, 1898. 
2. Oreoxis bakeri C. & R., sp. nov. Via. 46. 
Glabrous throughout except some puberulence at the top of peduncle 
and on rays, cespitose, from 
thickish elongated roots; leaflets 
opposite, 3 to 5 pairs, somewhat 
distant, 3 to 5-cleft into linear or 
linear-lanceolate entire lobes; pe- 
duncles longer than the leaves, 
3 to 8 cm. long, erect, or more or 
less inclined; flowering umbel 
very compact, almost) head-like; . 
fruiting rays nearly equal, 3 to 5 
mm. long; pedicels 2 mm. or less 
long; involucel of numerous dis- 
tinct obovate bractlets strongly 3-toothed at apex; fruit 3 to 4 mm. 
long, usually purplish; oil tubes 2 or 5 in the intervals. 
Type locality, mountains néar Pagosa Peak, Colorado. 
High mountains of Colorado. 
Fia. 46.—Oreoxisakeri: a, b, x 8. 
Specimens examined; 
Cotorapo : Mount Hayden, altitude 3,900 meters, Baker, Earle & Tracy 577, 
July 14, 1898; mountains near Pagosa Peak, altitude 3,600 meters, C.F 
Baker 12, August 23, 1899. 
3. Oreoxis alpina (Gray) C. & R. 
Cymopterus alpinus Gray, Am. Jour. Sci. IT. 88: 408. 1862. 
Puberulent (rarely glabrous), with paler more dissected leaves and 
shorter more crowded leaflets; involucels of somewhat broader bract- 
lets more or less united at base; flowers paler; fruit 4 to 5 mm. long, 
puberulent (at least when young); oil tubes solitary in the intervals. 
Type locality, ‘‘on high alpine ridges,” Colorado; colleeted by Parry 
in 1861; type in Herb. Gray. 
