308 



CYPERACEAE. 



49. Carex stricta Lam. Tussock Sedge. (Fig. 719.) 



Carex stricta I,am. Encycl. 3: 387. 1789. 



Glabrous, rather dark green, culms slender, stiff, erect, 

 usually in dense clumps, sharply 3-angled, rough above 

 -4 tall. Leaves long, rarely overtopping the culm, 

 very rough on the margins, i // -2 // wide, their sheaths 

 becoming prominently fibrillose; lower bract similar, 

 sometimes equalling the culm; statninate spikes solitary 



\ ,,,;"/ / i "jiB-ff or sometimes 2, stalked; pistillate spikes 2-5, linear-cyl- 



wDHI I || J ' indric, often staminate at the top, very densely flowered, 



or loose at the base. >'-2' long, about 2" thick, erec 

 or somewhat spreading, all sessile or the lower stalked; 

 perigynia ovate- elliptic, ascending, acute, faintly few- 

 nerved, i // long or less, minutely beaked, the orifice en- 

 tire or nearly so; scales brown-purple with green margins 

 andmidvein, oblong or lanceolate, appressed; stigmas 2. 



In swamps, Newfoundland to Ontario, south to Georgia 

 and Texas. Hybridizes with C. filiformis. July-Sept. 

 Carex stricta angustata (Boott) Bailey in A. Gray, Man. Ed. 6, 600. 1890. 

 Carex angustata Boott; Hook. Fl. Bor. Am. 2: 218. 1840. ? 



Pistillate spikes longer, 2' -4' long, erect; scales lanceolate, acute, often longer than the peri- 

 gynia. Range apparently nearly that of the type. 



Carex stricta xerocarpa (S. H. Wright) Britton, Bull. Torr. Club, 22: 222. 1895. 

 Carex xerocarpa S. H. Wright, Am. Journ. Sci. (II.) 42: 334. 1866. 



Pistillate spikes almost filiform, about i" in diameter, erect. New York to Illinois. 



50. Carex Haydeni Dewey. Hay den's Sedge. (Fig. 720. ) 



Carex af>erla Carey in A. Gray, Man. 547. 1848. Not 



Boott, 1840. 



C. Haydeni Dewey, Am. Journ. (II.) 18: 103. 1854. 

 C. stricta var. decora Bailey, Bot. Gaz. 13: 85. 1888. 



Glabrous, similar to C. stricta but smaller, culm 

 slender, rough above, seldom over 2 high. Leaves 

 i // -i^ // wide, rough-margined, shorter than or some- 

 times a little overtopping the culm, their sheaths 

 slightly or not at all fibrillose; lower bract foliaceous, 

 about equalling the culm; pistillate spikes linear-cy- 

 lindric, 6"-is" long, about 2" in diameter, erect or 

 somewhat spreading, all sessile or nearly so, some- 

 times with a few staminate flowers at the summit; 

 perigynia orbicular, obtuse, about y 2 " broad, faintly 

 2-4-nerved, minutely beaked, the orifice entire; 

 scales lanceolate, purplish, spreading, very acute, 

 about twice as long as the perigynia; stigmas 2. 



Swamps, New Brunswick to Rhode Island and Nebraska. 



51. Carex Nebraskensis Dewey. Nebraska Sedge. (Fig. 721.) 



Carex Nebraskensis Dewey, Am. Journ. Sci. (II.) 18: 

 102. 1854. 



Glabrous, culms rather stout, erect, sharp-angled, 

 smooth, or rough above, i-2% tall. Leaves pale 

 green, J^ // -2>^ // wide, rough-margined, not ex- 

 ceeding the culm, their sheaths more or less nodu- 

 lose; lower bract foliaceous, sometimes equalling 

 the culm, the upper much shorter and narrower; 

 staminate spikes commonly 2, stalked; pistillate 

 spikes 2-4, dense, oblong-cylindric, erect, *)"-i5 ff 

 long, about 3" in diameter, sessile or the lower 

 short-stalked; perigyuia ascending, elliptic or 

 somewhat obovate, prominently several-ribbed 

 when mature, short-beaked, the beak 2-toothed; 

 scales ovate or lanceolate, acute or mucronate, 

 brown with a green midvein or green all over^the 

 upper shorter than the perigyuia; stigmas 2. 



Nebraska to Oregon and New Mexico. May-Aug. 



