. MACKENZIE: NOTES ON CAREX 547 
long, much roughened; terminal spike staminate, slender, 5-9 
mm. long, 2.5 mm. wide, more or less strongly peduncled, several— 
many-flowered, the scales ovate, acute or short-acuminate, many- 
striate, purplish brown with lighter center and conspicuous 
white-hyaline margins; pistillate spikes 2-5, usually 5—15-flowered, 
the upper one or two usually approximate, sessile or short-pe- 
duncled (sometimes absent), the others widely separated, basal 
and strongly peduncled, the perigynia in several ranks, ascending; 
bract of upper spike (where spike is present) well developed, green, 
somewhat sheathing, slightly brownish-red tinged, shorter than 
inflorescence; scales ovate, acute to short-cuspidate, those of the 
upper spikes reddish brown with 3-nerved green center and white- 
hyaline margins, those of lower spikes slightly if at all reddish- 
brown tinged, all from slightly shorter to slightly longer and wider 
than but not enveloping or nearly concealing perigynia; perigynia 
puberulent, green, 3.25—4 mm. long, the body suborbicular, 2.25-2.5, 
mm. long, 1.75 mm. wide, 2-ribbed, otherwise nervelezs or more 
or less strongly nerved at base on one face, nearly orbicular in 
cross-section, strongly stipitate (0.5-0.75 mm.), abruptly con- 
tracted into the serrulate, slightly hyaline or purplish-tipped 
bidentate beak, 0.5-0.75 mm. long; achenes triangular with 
strongly convex sides, closely enveloped by perigynia, about 
2.25 mm. long, nearly 1.75 mm. wide, truncate and slightly apicu- 
ate at apex, round-tapering at base; style slender, not enlarged 
at base, readily detached; stigmas three. 
The type specimen, collected by Mr. W. W. Eggleston (6584) 
at Tierra Amarilla, Rio Arriba County, New Mexico, in the spring 
of 1911, isin the United States National Herbarium (sheet 660800). 
His numbers 6614, 6474, 6466, 6550, 6556, 6458, and 6593 from 
the same locality also belong here, as does also his 6655 collected 
near Chama, Rio Arriba County. The species is also represented 
by a’specimen in the Gray Herbarium, collected by Dr. Greene 
April 22, 1880 (deep shady canyon of Mineral Creek in the Mo- 
gollon Mountains). 
10. Carex brevicaulis sp. nov. 
In dense clumps, stoloniferous, the culms phyllopodic, 5-10 
cm. high, slender, exceeded by the leaves, sharply triangular, 
very rough on the angles, reddish brown and more or less fibrillose 
at base. Leaves with well-developed blades 6-10 to a fertile 
culm, clustered near base, the blades flat, 1.5-3.5 mm. wide, 
usually 2.5-7.5 cm. long, roughened above and towards apex; 
leaf-blades of sterile culms 5-12 cm. long; terminal spike stam- 
