MACKENZIE: NOTES ON CAREX 535 
fibrillose at base, much exceeded by leaves, slender, very rough 
on the sharp angles; sterile shoots strongly aphyllopodic. Leaves 
with well-developed blades four to eight to a fertile culm, the 
blades flat with slightly revolute margins, 1.5—3 mm. wide, those 
of the fertile culms short, of the sterile up to 25 cm. long, much 
roughened on both sides and averaging wider than those of the 
fertile; terminal spike slender, staminate, 5-8 mm. long, about 
0.5 mm. wide, sessile or short-peduncled, few-flowered, the scales 
lanceolate or ovate-lanceolate, acuminate with 1-3-nerved green 
center and broad hyaline margins richly chestnut-tinged; pistillate 
spikes 4-6, 1-4-flowered, the upper 2 or 3 approximate, sessile or 
short-peduncled, the others basal, widely separated and strongly 
peduncled (the erect peduncles not much elongated), the zigzag 
rachis often terminating in a sterile flower; bracts of upper spikes 
well-developed, green, hyaline-margined and chestnut-tinged, all 
or only the lowest exceeding inflorescence, the lower more or less 
strongly sheathing, the upper sheathless or nearly so; scales ovate 
or ovate-lanceolate, cuspidate or long-awned with several-nerved 
green center, and with wide, strongly hyaline reddish-brown tinged 
margins, usually slightly longer but narrower than perigynia; 
perigynia softly short-pubescent, green, usually reddish-brown 
tinged, 4.5 mm. long, the body oval, 2.5 mm. long, 1.75 mm. wide, 
strongly 2-ribbed, finely many-nerved on outer face, nearly or- 
bicular in cross-section, strongly stipitate (1 mm.), abruptly con- 
tracted into the serrulate, hyaline-tipped, bidentate beak 1 mm. 
long; achenes triangular with strongly convex sides, closely en- 
veloped by perigynia, 2.25 mm. long, nearly 1.75 mm. wide, 
truncate at apex, round-tapering at base; style slender, not en- 
larged at base, readily detached; stigmas three. 
The type specimen (herb. Brainerd) of this distinct plant 
was collected by Dr. Ezra Brainerd (z21) in El Dorado County, 
California, on July 19, 1897, on a mountain north of Slippery 
Ford in the Sierra Nevada Mountains. A duplicate of the type 
is in the Gray Herbarium. Bolander 6196, collected in 1866 in the 
Yosemite Valley (H.; L. S.), a specimen collected by Mrs. Austin, 
in 1877, in Plumer County (H.), and H. E. Brown 370, collected 
near Sisson, Siskiyou County, California (N. Y.) are probably to 
be referred to this species. None of these specimens, however, 
is in very good condition. 
3. CAREX NIGRO-MARGINATA Schwein. Ann. Lyc. N. Y. 1: 68. 
1824 
Carex lucorum var. nigro-marginata Chapm. Fl. S. E. U. S. 539. 
