308 CYPERACEAE. 
49. Carex stricta Lam. ‘Tussock Sedge. (Fig. 719.) 
Carex stricta Lam. Encycl. 3: 387. 1789. 
Glabrous, rather dark green, culms slender, stiff, erect, 
usually in dense clumps, sharply 3-angled, rough above, 
1%°-4° tall. Leaves long, rarely overtopping the culm, 
very rough on the margins, 1/’-2’’ wide, their sheaths 
becoming prominently fibrillose; lower bract similar, 
sometimes equalling the culm; staminate spikes solitary 
or sometimes 2, stalked; pistillate spikes 2-5, linear-cyl- 
indric, often staminate at the top, very densely flowered, 
or loose at the base, 4/-2’ long, about 2/’ thick, erect 
or somewhat spreading, all sessile or the lower stalked; 
perigynia ovate-elliptic, ascending, acute, faintly few- 
nerved, 1’’ long or less, minutely beaked, the orifice en- 
tire or nearly so; scales brown-purple with green margins 
and midvein, 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. cys 
Pistillate spikes almost filiform, about 1’! in diameter, erect. New York to Illinois. 
50. Carex Haydeni Dewey. NHayden’s Sedge. (Fig. 720.) 
Carex aperta 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. stricfa but smaller, culm 
slender, rough above, seldom over 2° high. Leaves 
1//-14’’ 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’’-15’’ 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 1%4’’ 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 eee Dewey. Nebraska Suit (Fig. 721.) 
Carex Nebraskensis Dewey, Am. Journ. Sci. (II.) 18: 
WW 102. 1854. 
Glabrous, culms rather stout, erect, sharp-angled, 
smooth, or rough above, 1°-234° tall. Leaves pale 
green, 114’’-214’’ wide, rough-margined, not ex- 
| gE cae the culm, their sheaths more or less nodu- 
j lose; lower bract foliaceous, sometimes equalling 
the culm, the upper much shorter and narrower; 
staminate spikes commonly 2, stalked; pistillate 
Ve spikes 2-4, dense, oblong-cylindric, erect, 9’’-15/’ 
YAA long, about 3’ in diameter, sessile or the lower 
short-stalked; perigynia ascending, elliptic or 
somewhat obovate, prominently several-ribbed 
when mature, short-beaked, the beak 2-toothed; 
scales ovate or lanceolate, acute or mucronate, 
AR 
brown with a green midvein or green all over, the 
upper shorter than the perigynia; stigmas 2. 
Nebraska to Oregon and New Mexico. May-Aug. 
