1905] NELSON—ROCKY MOUNTAIN PLANTS 63 
S. PTEROSPERMUM (Wats.); Oenothera pterosperma Wats., King’s 
Rep. 112. 
S. RuTILUM (Davids.); Oenothera rutila Davids., Erythea 2:61. 
COOPER’S COLORADO COLLECTIONS 
In the summer of 1904, Mr. WILi1AM S. Cooper, a student in 
Alma College, Michigan, spent some weeks in Colorado collecting 
in the vicinity of Estes Park and upon Long’s Peak. He secured 
over 300 numbers, many of them of great interest. The following 
I will characterize as new: 
Oreocarya pulvinata, n. sp.—Cespitose-pulvinate, practically 
stemless, the small cushions a few centimeters across and about 1°™ 
high; flowers as well as the leaves involved in the soft villous pubes- 
cence: leaves crowded, broadly linear, less than 1°™ long: flowers 
few, glomerate at the summit of the reduced stems (the stems scarcely 
rise above the matted leaves): calyx-lobes linear, nearly equaling 
the corolla tube: corolla white; its tube dilated, subspherical, about 
2™™ long, the broad throat only partly closed by the conspicuous 
crests; the lobes of the limb suborbicular, about as long as the tube: - 
stamens small, included, inserted near the middle of the tube; fila- 
ment almost wanting: style short, rather thick, equaling the stamens. 
This species so closely simulates Eritrichium aretioides (before the flower 
stalks of that species have developed) that one would almost certainly pronounce 
it an Eritrichium at the first glance. The pubescence and pulvinate habit are 
similar, but a glance at the flowers does not leave one in doubt very long. 
e type material, no. 278, is very scanty, but so characteristic a species 
cannot be ignored.- Collected on Mummy Mts., Estes Park, Aug. 12, 1904, 
alt: 12-13,000*, 
Chrysopsis Cooperi, n. sp.—Whitened with soft loose long-villous 
pubescence throughout: stems low, spreading, more or less decum- 
bent at base, 10-15°" high, leafy throughout: leaves narrowly 
oblanceolate, tapering into a margined petiole-like base, from 2-5°™ 
long, middle and upper stem leaves usually longer than the basal: 
heads solitary, terminal and axillary; terminal head large, 12-14™™ 
high and considerably broader, subtended by some foliar bracts 
which are long-ciliate on the margins; axillary heads reduced down- 
ward, on successively shorter leafy peduncles, usually only the 
2 OF 3 uppermost developing, the others becoming sessile and aborted 
