GENUS 18. 



SEDGE FAMILY. 



409 



146. Carex aestivaliformis Mackenzie. False Summer Sedge. Fig. 1013. 



C. gracillima X aestivalis? Bailey, Bull. Torr. Club 20 : 



419. 1893. 

 C. aestivaliformis Mackenzie, Bull. Torr. Club 37: 238. 



1910. 



Culms slender, erect, strongly roughened above, i- 

 2 high. Leaves flat, \"-2." wide, elongated, but usually 

 shorter than the culms, rough, the lower sheaths (at 

 least) short-pubescent, the blades . sometimes slightly 

 so; lower bract foliaceous, often overtopping the culm, 

 strongly sheathing, the others smaller, little sheathing ; 

 spikes 3 to 5, narrowly linear-cylindric, i'-ii' long, \\" 

 in diameter, many-flowered with -perigynia rather close, 

 filiform-stalked, and, at maturity, spreading or droop- 

 ing, the terminal one gynaecandrous ; perigynia oblong- 

 ovoid, obscurely triangular, deep green, round-tapering 

 at base, slightly swollen, somewhat less than 2" long, 

 nearly i" thick, strongly several-nerved, tapering and 

 very short-beaked at apex, the orifice more or less 

 hyaline and emarginate or shallowly bidentate; scales 

 ovate, strongly hyaline-margined, somewhat shorter 

 than the perigynia ; stigmas 3. 



In mountain meadows, New Jersey, New York and Penn- 

 sylvania. June-July. 



147. Carex aestivalis M. A. Curtis. Summer Sedge. Fig. 1014. 



Carex aestivalis M. A. Curtis ; A. Gray, Am. Journ. Sci. 

 42 : 28. 1842. 



Culms very slender or filiform, erect or nearly so, 

 rougliish near the summit, i-2i tall. Leaves flat, 

 \"-\\" wide, elongated but usually shorter than the 

 culm, the lower sheaths at least short-pubescent, the 

 blades sometimes slightly so; lower bracts sheathing, 

 similar to the leaves, but narrower, the others smaller, 

 little sheathing; spikes 3-5, narrowly linear, erect or 

 somewhat spreading, i'-z' long, about li" thick, 

 loosely many-flowered or the upper ones dense, the 

 terminal one staminate at the base or also at the 

 summit; perigynia narrowly elliptic, pointed at both 

 ends, 3-sided, not inflated, glabrous, few-nerved, i' 

 long or less, ' thick, beakless, the orifice entire ; 

 scales ovate-oblong, obtuse, or the lower cuspidate 

 or short-awned, green, thin, usually about one-half 

 as long as the perigynia or more ; stigmas 3. 



In mountain woods, New Hampshire, Massachusetts 

 and northern New York to Georgia. Winter-grass. 

 June-Aug. 



148. Carex oblita Steud. 



Dark-green Sedge. 



Fig. 1015. 



1855. 



Carex oblita Steud. Syn. PL Cyp. 231. 



Carex glabra Boott, 111. 93. 1860. 



Carex vanista var. minor Boeckl. Linnaea 41 : 255. 1877. 



Glabrous, culms slender, erect or lax, sharply 3-angled, 

 smooth or very nearly so, i-3 high. Leaves 2"-3" 

 wide, shorter than the culm, slightly rough; lower bract 

 similar to the culm-leaves but narrower, the sheaths 

 puberulent ; staminate spike solitary, filiform-stalked, 

 sometimes partially pistillate; pistillate spikes 2-4, nar- 

 rowly linear, i'-2 long, about 2" thick, loosely 4-18- 

 flowered, slender-stalked, the upper mostly close together 

 and spreading or ascending, the lower distant, drooping; 

 perigynia dark green, coriaceous, 3-angled, glabrous, 

 somewhat more than 2.V long, less than i" thick, 

 ascending, rather strongly about lo-nerved, tapering into 

 a short hyaline-tipped, 2-toothed beak ; scales obtuse or 

 acute, strongly reddish-brown-tinged, one-third to one- 

 half the length of the perigynia ; stigmas 3. 



In bogs, central New York, Pennsylvania and New Jersey 

 to Alabama and Louisiana. June-Aug. 



