MACKENZIE: NOTES ON CAREX 153 
20 mm. long and about 7 mm. broad, the individual spikes poorly 
defined, and having from two or three to about ten ascending or 
somewhat spreading perigynia at the base of the rather inconspicu- 
ous terminal staminate flowers, which form a short cylinder ; bracts 
absent, or occasionally the lowest one present, 8 mm. long or less, 
awl-shaped, long-attenuate; scales broadly triangular, hyaline, 
with the central portion brownish straw-colored, acuminate to 
short-cuspidate, noticeably exceeded by the perigynia; perigynia 
oblong-elliptical, 3.5 mm. long, 2 mm. wide, flat on the inner, 
rounded on the outer surface, the body round-tapering at base, 
beak, which is about 1 mm. long, the body smooth, polished and 
nerveless ; achenes lenticular, with orbicular face, 2 mm. long, 2 
mm. wide; stigmas two. 
Several specimens of this distinct plant have been collected 
within the last few years, and by some collectors have been named 
Carex vallicola Dewey. The original description of this last-named 
species, however, does not answer to our plant at all, but rather 
seems to indicate Carex Hookeriana Dewey, calling as it does fora 
plant with developed bracts and large scales. Our plant is readily 
distinguished from both Carex Hookeriana Dewey and its close 
relative Carex occidentalis Bailey by the scales being much shorter 
than and exposing the perigynia, while in the two species referred 
to the scales completely cover the perigynia or very nearly so. 
SPECIMENS EXAMINED : 
Wyominc: Red Desert, Orendo Butte, Sweetwater County, A. 
Nelson 7124, June 11, 1900 (type, in Herb. N. Y. Bot. Gard.); 
Evanston, A. Nelson 3000, May 29, 1897 (very young); Leucite 
Hills, Merrill & Wilcox 487, June 17, 1901. 
Orecon: North Pine Creek near Snake River, Cusick 25179, 
May 24, I190I. 
’ Carex neomexicana sp. nov. 
Culms erect, growing in small clumps, 2.5—4 dm. high, much 
exceeding the leaves, which are clustered towards the base, rough- 
ened on the angles, especially above. Leaves with well-developed 
blades about three to a culm, the blades erect-ascending, 1.5-2.5 
mm. wide, 1-3 dm. long, roughened, especially on the margins ; 
spikes few (about five), all aggregated into a rather stiff head 1.5- 
2.5 cm. long and about 1 cm. wide, the upper spikes not distin- 
guishable, the lower readily distinguishable but little separated, 
