610 MACKENZIE: NOTES ON CAREX 
much more slender plant. It bears about the same relation to 
that species that Carex tenera Dewey does to Carex Bebbit Olney. 
The type specimen was collected “in shade of thicket” at Jones- 
ville, Northern Butte County, at an elevation of 5,100 feet, on 
July 25, 1914, by Professor H. M. Hall (No. 9781), and is in my 
herbarium. Professor Jepson’s 4374, collected July 6, 1911, at 
Eagle Pass, Yosemite, is to be referred here, as is probably also a 
young specimen collected by Bioletti near Nevada Falls, Yosemite 
Valley, in May, 1900. 
’ Carex olympica sp. nov. 
Densely cespitose, the rootstocks short, slender, conspicuously 
fibrillose covered; culms in small clumps very slender, but stiff 
and erect, 1.5-6 dm. high, 1-2 mm. wide at base, much exceeding 
leaves, roughened on angles beneath head, aphyllopodic, and light 
brownish at base, maturing second year, old leaves of first year’s 
growth conspicuous. Leaves with well-developed blades, three or 
four to a fertile culm, inserted on lower fifth, the blades flat with 
slightly revolute margins, 1-2 mm. wide, 7.5-15 cm. long, light 
green, roughened towards apex; the sheaths hyaline opposite 
blades, truncate at mouth and not prolonged upward; sterile 
culm leaves similar. Spikes three to six, aggregated or in a 
slender more or less strongly interrupted head, 12-24 mm. long, 
5~10 mm. wide, the spikes orbicular, 4-6 mm. in diameter, rounded 
at apex, rounded or the terminal one clavate at base, the perigymia 
eight to fifteen closely packed in several rows, ascending or in 
age more or less spreading, the tips conspicuous; basal staminate 
flowers inconspicuous, except in terminal spike; bracts scale-like 
or lower slightly prolonged. Scales ovate, acute or subcuspidate, 
at maturity chestnut brown with lighter midvein and slightly 
hyaline’ Margins, as wide as but conspicuously shorter than 
perigynia. Perigynia narrowly to broadly ovate, thickish and 
strongly plano-convex, narrowly winged, the walls thickish, 3.5~5 
mm. long, 1.5-2 mm. wide, greenish but soon becoming olive- 
brown tinged, rounded at base, several nerved on outer face, 
nerveless or very obscurely nerved at base on inner face, the body 
little serrulate, tapering into the serrulate beak half length of 
body, which is dark tipped, minutely bidentate, smooth and 
obscurely hyaline at the extreme apex, obliquely cut on convex 
side, the orifice not hyaline. Achenes lenticular, ovate, 1.25 mm. 
long, 0.75 mm. wide; stigmas two, slender, short. 
The species here described is a widely distributed plant in 
British Columbia, Washington and Oregon, and extends as far 
