612 MACKENZIE: NOTES ON CAREX 
culm, on lower half, not bunched, the sheaths rather loose, hyaline 
ventrally, soon breaking, conspicuously many-striate dorsally; 
the blades erect, flat, 2.5-4 mm. wide, mostly 1-2 dm. long. Head 
2.5-3.5 cm. long, 8-15 mm. wide, the spikes six to twelve, closely 
approximate or lower slightly separate, ovoid or oblong ovoid, 
7-15 mm. long, about 4—5 mm. wide, short clavate and sparingly 
staminate at base, rounded at apex, the fifteen to thirty-five 
perigynia closely appressed with erect tips. Bracts conspicuous, 
dilated at base, closely appressed to spikes, the lower three or 
four usually prolonged and from nearly equalling to exceeding 
head, the others less prolonged. Scales ovate, acute or short 
cuspidate, greenish and slightly tawny tinged, the midvein 
prominent, somewhat narrower and shorter than perigynia. Peri- 
gynia (young) ovate, 3.5-4 mm. long, 1.75 mm. wide, rounded 
and contracted at base, margined, several nerved on both faces, 
strongly serrulate, light green, contracted into a beak one third to 
one half length of body, the tip slightly tawny tinged and 
obliquely cut dorsally. Achenes lenticular, apiculate, the slender 
style at length deciduous. Stigmas two. 
The type specimen of this species in the herbarium of Dr. 
Brainerd was called to my attention by him several years ago as 
probably representing an undescribed species. The bracts are 
especially amplectant at flowering time. At maturity this char- 
acter is less evident. It is a species of the Sierra Nevada 
Mountains. 
SPECIMENS EXAMINED 
CaLtForNIA: Yosemite, 4,000 ft., Jepson 4265 in part, June 
24, 1911 (K.M.); Nevada Falls, Yosemite Valley, Bioletti, May, 
1900 (K.M.); Snow Creek Trail, Yosemite, 6,000 ft., Jepson 4388 
in part, July 8, rg11 (K.M.); Big Tree Grove, 4,788 {t., Bolander 
4978, 1866 (Cal., Brainerd); road near Lover’s Leap, Eldorado 
County, 5,900 ft., Brainerd 2009, July 22, 1897 (type, in Herb. 
Brainerd). 
i 
Carex sub-bracteata sp. nov. 
Cespitose, from short creeping tough black fibrillose root- 
stocks, the culms erect, 5-8 dm. high, obtusely triangular, smooth, 
much exceeding leaves, light brownish at base. Leaves with well- 
developed blades usually three to five to a fertile culm, on lower 
fourth, but not bunched, the blades flat, 2.5-4 mm. wide, usually 
1-3 dm. long. Head globose or ovoid, 1:5-2.5 cm. long, and 
rather narrower, the spikes five to ten, closely aggregated, gynae 
