426 



CYPERACEAE. 



Vol. I. 



197. Carex impressa (S. H. Wright) Mackenzie. 



Fig. 1064. 



Hart Wright's Sedge. 



Carex riparia var. impressa S. H. Wright, Bull. Torr. Club 



9: 151. 1882. 

 Carex impressa Mackenzie, Bull. Torr. Club 37 : 236. 



1910. 



Culms stout and generally smooth, erect*i4°-3° tall, 

 neither purplish-tinged nor filamentose at base, the 

 lower sheaths blade-bearing. Leaves elongated, nodu- 

 lose, usually more or less scabrous, somewhat glaucous, 

 2"-4" wide, flat or folded at base, usually exceeding 

 the culm; lower bract similar to the leaves, the upper 

 reduced; staminate spikes 2-4, linear, their scales 

 straw-colored or light purplish-tinged; pistillate spikes 

 2-4, cylindric, ¥-3' long, about 5" in diameter, usu- 

 ally widely separate, erect, short-peduncled; perigynia 

 narrowly ovoid, 3" long, ii" wide, firm, impressed- 

 nerved when young, appearing nearly nerveless when 

 mature, scarcely inflated, tapering into a 2-toothed 

 beak, the teeth erect or slightly divergent, J" long; 

 scales ovate, the lower aristate and exceeding peri- 

 gynia, the upper more acute and shorter, straw- 

 colored or light purplish-tinged; stamens 3. 



In swamps, Ohio to Kansas, Florida and Texas. 



198. Carex Walteriana Bailey. Walter's Sedge. Fig. 1065. 



Carex striata Michx. Fl. Bor. Am. 2: 174. 1803. Not Gilib. 



1792. 

 Carex Walteriana Bailey, Bull. Torr. Club 20: 429. 1893. 

 C. striata var. brevis Bailey, Mem. Torr. Club 1 : 34. 1889. 



Long-stoloniferous, the culms slender, strict, erect, 

 slightly rough above, i°-2j° tall. Leaves narrow and elon- 

 gated, smooth or roughish, i"-2" wide, nodulose, becom- 

 ing involute; lowest bract similar, often very long, the 

 upper smaller and often almost filiform; staminate spikes 

 1 or 2, long-stalked ; pistillate spikes 1 or 2, when 2 the 

 lower remote from the upper, sessile or very short-stalked, 

 oblong-cylindric, erect, ¥-2' long, 3"-4" in diameter, 

 many-flowered; perigynia ovoid, many-nerved, slightly in- 

 flated, ascending, glabrous, or partly or wholly short- 

 pubescent, 2"-2i" long, ii" in diameter, tapering into a 

 shprt 2-toothed beak, the teeth short, variable; scales 

 ovate, short-aristate, acute or obtuse, membranous, one- 

 half to two-thirds length of perigynia. 



In pine-barren bogs, southeastern Massachusetts to Florida, 

 near the coast. May-July. 



199. Carex vestita Willd. 

 1066. 



Velvet Sedge. Fig. 



Carex vestita Willd. Sp. PI. 4: 263- 1805. 



Carex vestita var. Kennedyi Fernald, Rhodora 2 : 170. 1900. 



Strongly stoloniferous, culms strict, erect, ii°-2i° 

 tall, rough above, reddened and filamentose at base. 

 Leaves distant, ij"-2i" wide, not overtopping the culm; 

 bracts narrower, short, rough on the margins ; staminate 

 spike solitary, rarely 2, sessile or short-peduncled; pis- 

 tillate spikes i-S, oblong, 4"-i4" long, 3"-4" in diameter, 

 erect, commonly staminate at the summit, sessile or the 

 lower very short-stalked ; perigynia ovoid, ascending or 

 the lower spreading, densely pubescent, less than 1" in 

 diameter, nerved, slightly shorter than or equalling the 

 ovate-obtuse or acute scales; the beak white-hyaline 

 at orifice, in age bidentate; stigmas 3. 



In sandy woods, southern Maine to eastern New York and 

 Pennsylvania, south to Georgia. May-July. 



