606 MACKENZIE: NOTES ON CAREX 
Wasuincton: Falson Valley, Suésdorf, May—July, 1884. 
New Mexico: Fendler 881, 1847. 
/Carex perglobosa sp. nov. 
“Carex incurva Lightf.?” Bailey, in Coulter, Manual Rocky Moun- 
tain Region 390. 
Culms erect, 12 cm. high, growing in small clumps, from run- 
ning rootstocks, smooth on the angles, usually exceeding the 
leaves. Leaves clustered towards the base of the culms, the 
blades erect or somewhat spreading, 2-8 cm. long, 0.75—1.5 mm. 
wide, flattened at base, narrow but hardly involute above, slightly 
roughened towards the apex ; head erect, very globular, about 1 
cm. in diameter, the spikes entirely undistinguishable, the staminate 
flowers apical, very inconspicuous ; perigynia numerous ; bracts 
absent ; scales ovate-orbicular, brownish with silvery hyaline 
margin, obtusish or acutish, rather wider than, but exceeded at 
maturity (usually strongly) by, the perigynia; perigynia brownish 
at maturity, ovate-elliptic, 4 mm. long, 2.25 mm. wide, somewhat 
inflated and slightly nerved on both faces, rounded at base, gradu- 
ally tapering into the serrulate bidentate beak which is one third 
or less of the length’of the marginless body ; achenes lenticular 
with oblong-orbicular face, 1.75 mm. long, 1.25 mm. wide; stigmas 
This species which occurs in the high mountains of Central 
Colorado has heretofore been referred to the circumboreal Carex 
incurva Lightf., a species which in America extends south in the 
Canadian Rocky Mountains as far as Banff, but which I have not 
seen from the United States. The species are, however, clearly 
distinct, and may be distinguished from one another as well as 
from Carex vernacula Bailey (C. foetida Am. authors) as follows - 
Leaf-blades 2-3.5 mm, wide; perigynium little exceeding scale at maturity. 
C. vernacula. 
Leaf-blades 1.5 mm. wide or less ; perigynium much exceeding scale at maturity. 
Head suborbicular to short-oblong, the spikes apparent ; perigynium 3 mm. long; 
1.5 mm. wide, stipitate, not inflated. C. incurva. 
Head orbicular, the spikes not apparent; perigynium 4 mm. long, 2.25 mm. wide 
not stipitate, somewhat inflated. C. perglobosa. 
The following specimens have been examined, all from Colorado: 
Mt. Baldy, Summit County, Mackenzie 167, August, 190! 
(type, in Herbarium K, K. Mackenzie); Parry 385, 1861; Gray's 
Peak and vicinity, Patterson, September 2, 1885; Silver Plume, 
Rydberg, August 21, 1895. 
