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, i$-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, li" 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, i" 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 i : 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 

 I or 2, long-stalked ; pistillate spikes I 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 

 short 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. Velvet Sedge. Fig. 

 1066. 



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



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



Strongly stoloniferous, culms strict, erect, ri-2i 

 tall, rough above, reddened and filamentose at base. 

 Leaves distant, ii"-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 1-5, oblong, 4"- 14" 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 i" 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. 



