MACKENZIE: NOTES ON CAREX 609 
‘SPECIMENS EXAMINED 
CALIFORNIA: Summit, Placer County, 7,000 feet, Heller 0841, 
July 16, 1909 (type, in Herb. K.M.); Jason & Stewart’s Camp, 
headwaters of Hat Creek, Shasta County, 2,120 m., Eggleston 
7380, 7430, July 31, 1911 (K.M.); meadow near Stoneman Bridge, 
Yosemite Valley, Abrams 43090, July 19, 1911 (K.M.); trail to 
Slippery Ford, Eldorado County, Brainerd 216, July 10, 1897 
(Brainerd); above Slippery Ford, Eldorado County, Brainerd 
205 in part, July 15, 1897 (Brainerd). 
OREGON: West slope of Three Sisters, 5,000 ft., M. E. Peck 72, 
_ July 19, 1914 (K.M.). 
’ Carex teneraeformis sp. nov. 
Cespitose, the culms 3-4.5 dm. high, erect, very slender, tri- 
angular, smooth or nearly so on angles, exceeding leaves, aphyllo- 
podic, light brownish at base. Sterile shoots conspicuous with 
four to six erect leaves. Fertile culms normally making growth 
in one year, with three to four leaves on lower fourth, but not 
bunched, the sheaths strongly hyaline ventrally, the blades flat 
or with slightly revolute margins, 1.5 mm. wide, usually 6-18 cm. 
long; sterile shoots with similar leaves. Spikes five to eight, 
readily distinguishable, -+ strongly separate in a slender head, 1.5- 
2.5 cm. long and much narrower, the spikes gynaecandrous, 
3-5-6 mm. long, 3.5-4.5 mm. wide, rounded at apex, the lateral 
rounded and the terminal short tapering at base, the six to twelve 
perigynia loosely appressed in several ranks, with rather con- 
spicuous tips, the staminate flowers few and inconspicuous; bracts 
scale-like or lowest sometimes slightly prolonged. Scales ovate, 
acute, light brownish with lighter midvein and inconspicuous 
white hyaline margins, narrower and slightly shorter than peri- 
-gynia. Perigynia green, ovate, widest near middle of achene, 
3-25 mm. long, 1.25 mm. wide, plano-convex, thickish, winged to 
base, the walls submembranaceous, conspicuously several nerved 
i rounded at base, 
serrulate above and on beak, tapering into a slender white hyaline 
slightly dark tipped beak, 1 mm. long, obliquely cut dorsally, 
ip wi the teeth strictly erect 
and closely contiguous. Achenes lenticular, short suborbicular, 
sessile, 1 mm. long, nearly I mm. wide, 
at length deciduous; stigmas two. 
Related to Carex subfusca W. Boott, from which it is to be 
_ distinguished by the loose inflorescence and in general by being a 
