-- 
MACKENZIE: NoTES ON CAREX 155 
the blades erect-ascending, 1.5-2.5 mm. wide, 1-3 dm. long, 
roughened, especially on the margins; spikes five to ten, the lower 
three to six separate, the upper aggregated and undistinguishable, 
the whole head slender and often rather flexuous, 2-5 cm. long 
and less than 1 cm. wide, each spike bearing the few staminate 
flowers above and the few (10 or less) ascending perigynia beneath ; 
bracts, especially the lower, well-developed, somewhat enlarged at 
base, prolonged into a long cusp, usually or often exceeding their 
spikes, and the lowest often exceeding the head ; scales ovate-tri- 
angular, brownish straw-colored with opaque margin and green 
mid-rib, acuminate to cuspidate, rather wider and from slightly 
longer to slightly shorter than and largely concealing the peri- 
gynia; perigynia lanceolate, flat on the inner and rounded on the 
outer surface, glabrous, nerved on both surfaces, especially strongly 
on the inner, the whole 5 mm. long, the body 1.5 mm. wide, mar- 
gined above, round tapering at base into a stipe 0.5 mm. long and 
rather gradually contracted into a rough bidentate beak, which is 
about one-third the length of the body ; achenes lenticular with 
short-oblong face, 3.25 mm. long, 1.5 mm. wide ; stigmas two. 
Related to the northern and high mountain Carex Hookeriana 
Dewey, this species seems to take its place in the foothills south- 
erly and easterly of San Francisco, from which region have come 
all the specimens I have seen. It is quickly distinguished from 
that plant, as follows: 
C. Hookeriana. 
Perigynia nerveless on inner surface, 3.5 mm. long or less. 
C. tumu/icola. 
Perigynia strongly nerved on inner surface, 5 mm. long. 
SPECIMENS EXAMINED ¢ 
CALIFORNIA: Lake Temescal, Alameda county, Bioletti, June 
25, 1893 (type, in Herb. Columbia College) ; Oakland, Bolander ; 
Los Gatos, Santa Clara County, Heller 7309, April 12, 1904. 
