107. Carex Richardsonii R. Br. Richardson's Sedge

Fig. 974

Carex Richardsonii R. Br. Frankl. Journ. 751. 1823.

Stolomferous, the culms slender, rough, erect, 4'-12' tall. Leaves flat, about 1" wide, the basal shorter than or sometimes equalling the culm, those of the culm very short; bracts bladeless, sheathing, -1/4'-1' long, usually brown-purple with a white hyaline acute summit; staminate spike solitary, stalked, 6"-13" long; pistillate spikes 1 or 2, erect, narrowly cylindric, short-stalked, 4"-10" long, compactly many-flowered, close together, their stalks partly or wholly enclosed in the sheaths; perigynia obovoid, triangular, pubescent, about 1" long, minutely beaked, obscurely nerved, mostly shorter than the ovate, subacute, purple, conspicuously white-margined scales; stigmas 3.

In dry soil, Ontario to Saskatchewan, Alberta and British Columbia, south to western New York, Illinois, Iowa and South Dakota. Summer.

108. Carex Eburnea Boott. Bristle-Leaved Sedge

Fig. 975

C. alba var. setifolia Dewey, Am. Journ. Sci. 11: 316. 1826. C. eburnea Boott; Hook. Fl. Bor. Am. 2: 226. pl. 225. 1840. Carex setifolia Britton; Britton & Brown, 111. Fl. 1: 332. 1896.

Glabrous, pale green, culms filiform, smooth, weak, 4-15' long, from slender, elongated rootstocks. Leaves filiform, shorter than the culm, less than 1/4" wide; bracts reduced to bladeless sheaths 2"-5" long; staminate spike solitary, sessile or very nearly so, 2"-4" long; pistillate spikes 2-4, erect, slender-stalked, 2"-4" long, rather less than 1" thick, loosely few-flowered, the upper commonly overtopping the staminate, the lower one sometimes distant; perigynia oblong, pointed at both ends, 3-angled, 1" long, 1/2" or less thick, polished and nearly black when mature, very faintly few-nerved, tapering into a short entire beak; scales ovate, obtuse or the lower acute, thin, hyaline, shorter than the perigynia; stigmas 3.

In dry sandy or rocky soil, preferring limestone rocks, New Brunswick to Alberta, south to Virginia, Tennessee, Missouri and Nebraska. May-July.

108 Carex Eburnea Boott Bristle Leaved Sedge 975108 Carex Eburnea Boott Bristle Leaved Sedge 976

109. Carex Hassei Bailey. Hasse's Sedge

Fig. 976

C. aurea var. celsa Bailey, Mem. Torr. Club 1: 75. 1889.

Carex Hassei Bailey, Bot. Gaz. 21: 5. 1896. C. bicolor Robinson & Fernald, in A. Gray, Manual, Ed. 7, 232. 1909. Not All.

Similar to the following species, the culms slender, usually 6"-2° long, from slender elongated rootstocks. Leaves flat, 1"-2" wide, generally shorter, than culm; bracts similar to culm-leaves, the lower exceeding spikes, sheathing, not dark auricled; terminal spike short-stalked, gynae-candrous or frequently staminate; pistillate spikes 2-5, linear-oblong, the upper aggregated and sessile or short-stalked, the lower distant and long-stalked, loosely or somewhat compactly 6-20-flowered, 2"-10" long, about 1 3/4 " thick; perigynia ellipsoid or narrowly obovoid, whitish pulverulent and not fleshy or translucent at maturity, less than 1" in diameter, the nerves faint, tapering at base, beakless, the orifice entire; scales as in the next, but more often dark-tinged; stigmas 2.

Labrador to north Maine, westward across the continent and south in the mountains of California. June-Aug.