408 



CYPERACEAE. 



Vol. I. 



143. Carex formosa Dewey. Handsome 

 Sedge. Fig. 1010. 



Carex formosa Dewey, Am.'Journ. Sci. 8: 98. 1824. 



Culms slender, smooth, erect, l°-2i° tall. 

 Leaves flat, more or less pubescent, the basal 

 ii"-3i" wide, shorter or longer than the culm; 

 lower bract similar to the shorter culm-leaves; 

 spikes 3-5, all gynaecandrous, oblong-cylindric, 

 dense, i'-li' long, 2i" in diameter, filiform- 

 stalked, spreading or drooping, the lower dis- 

 tant ; perigynia oblong-ovoid, glabrous, ascending, 

 swollen, faintly few-nerved, 2" long, 1" thick, 

 tipped with a very short, emarginate beak; scales 

 lanceolate or ovate, green, with scarious margins, 

 mostly 'acute or obtuse, and much shorter than 

 the perigynia, or the lower short-awned and 

 equalling them; stigmas 3. 



In dry woods and thickets, Massachusetts and Ver- 

 mont to southern Ontario, New York and Michigan. 

 June-July. 



144. Carex oxylepis Torr. & Hook. 



Sharp-scaled Sedge. 



Fig. ion. 



Y. 3: 409. 



Carex oxylepis Torr. & Hook. Ann. Lye. N, 

 1836. 



Culms slender, smooth, or nearly so, erect, i°-23° 

 tall. Leaves flat, 1V-3V wide, pubescent, especially 

 on the sheaths, shorter than or exceeding the culm, 

 the lower bract similar but narrower; spikes 4 or 5, 

 • linear-cylindric, f-2' long, 1V-2" in diameter, 

 rather densely many-flowered, filiform-stalked and 

 at maturity spreading or drooping, the terminal one 

 normally gynaecandrous ; perigynia oblong-oval, ob- 

 scurely 3-angled, round-tapering at base, slightly 

 swollen, ii"-2" long, scarcely 1" thick, punctate, 

 several-nerved, rounded and abruptly minutely 

 beaked, the orifice emarginate at apex; scales ovate- 

 lanceolate with broad white scarious margins, acumi- 

 nate or short-awned, about one-third shorter than 

 the perigynia; stigmas 3. 



Southern Missouri to Tennessee and South Carolina, 

 south to Texas and Florida. April-May. 



Carex Davisii Schwein. & Torr. Davis' Sedge. Fig. 1012. 



Carex Davisii Schwein. & Torr. Ann. Lye. N. Y. 1 : 326. 



1825. 

 Carex Torreyana Dewey, Am. Journ. Sci. 10: 47. 1826. 



Similar to Carex oxylepis, culms stouter, ii°-3° tall. 

 Leaves ii"-3" wide, flat, pubescent, especially on the 

 sheaths, the basal ones shorter o'r longer than the 

 culm; lower bract foliaceous, often overtopping the 

 spikes; spikes 3-5, linear-oblong or oblong-cylindric, 

 clustered near the summit or the lower one distant, 

 dense, J'-ii' long, 3" or less in diameter, all filiform- 

 stalked and at length spreading or drooping, the ter- 

 minal gynaecandrous; perigynia oblong-ovoid, much 

 swollen, glabrous, strongly several-nerved, 2"-2i" long, 

 rather more than 1" thick, tipped with a very short, 

 minutely 2-toothed beak; scales ovate-lanceolate, long- 

 awned, spreading, shorter or longer than the peri- 

 gynia; stigmas 3. 



In moist thickets and meadows, Massachusetts to Minne- 

 sota, south to Georgia, Kentucky and Texas. May-July. 



