Chapter C: GRACILLIMA x PUBESCENS, Bailey. Tall and erect; leaves narrower than

in the last, usually slightly hairy; spikes slender, erect or slightly spreading, often staminate at top; perigynium exactly intermediate between the two species, ovate, obscurely nerved, sparsely hairy, beaked, about the length of the ovate ciliate rough-awned scale. (C. Sullivantii, _Boott_.)--Columbus, Ohio (_Sullivant_); Yonkers, N. Y. (_E. C. Howe_); Stanton, Del. (_Commons_).

[++][++] _Perigynium large, prominently inflated_.

56. C. formosa, Dewey. Slender, erect, 1--21/2 deg. high; leaves flat, mostly rather broad, those of the culm very short; spikes 3--5, scattered, oblong or short-cylindrical (1' long or less), compact, all flexuose or drooping; perigynium ovate, puncticulate, obscurely nerved, short-beaked with a slightly notched orifice, all but the lowest one or two twice longer than the blunt or cuspidate scale.--Woods and copses, Vt. to Mich.; local.

57. C. Davisii, Schwein. & Torr. Always taller; spikes heavier; perigynium more inflated, strongly nerved and prominently toothed, no longer or shorter than the conspicuously awned and spreading scale.--Wet meadows, W. Mass. to S. Minn., and southward; rare east and northward.

[*] 4.--[+] 6. _Griseae_.

58. C. grisea, Wahl. Stout, 1--2 deg. high; leaves broad (2--3'') and slightly glaucous; bracts broad and leaf-like, diverging, very much exceeding the culm; staminate spike small and sessile; pistillate spikes 3--4, short (1' long or less), the highest two usually contiguous to the staminate spike and sessile, the others somewhat remote and peduncled, all erect, compact; perigynium oblong, pointless, marked with impressed nerves, turgid and cylindric, all but the lowest longer than the narrow, cuspidate or blunt, nerved scale.--Moist grounds, throughout, except along our northern borders; common.--Var. ANGUSTIFOLIA, Boott. Much more slender; leaves scarcely half so wide, the bracts, especially, much narrower and shorter and more erect; spikes slender, perigynium scarcely inflated, triangular-oblong, bearing a sharp beak-like point, 2-ranked; scale nerveless, long-awned and spreading. N. J. to S. Ohio, and southward; common.--Var. GLOBOSA, Bailey. Low, 3--12' high, often spreading; spikes few-flowered, often with but 2 or 3 perigynia; perigynium short, inflated, very blunt, nearly globose or obovate; scale short, not prominently cuspidate or the upper ones wholly blunt. Mo., Kan., and southward.

Var. (?) rigida, Bailey. Rigid; leaves rather narrow, long and erect; staminate spike prominently peduncled; pistillate spikes scattered, all more or less stalked, conspicuously 2 ranked; perigynium triangular-oblong, hard, longer than the cuspidate ascending scale.--Sellersville, Penn., and Del.

59. C. glaucodea, Tuckerm. Lax or somewhat strict (6--18' high), densely glaucous; leaves flat, variable in width; spikes as in n. 58; perigynium firm, not inflated, prominently impressed-nerved, glaucous, longer than the short-cuspidate or blunt thin and appressed scale. (C. flaccosperma, last ed.)--Meadows and swamps, Mass. to S. Ill., and southward; local.

[*] 5. SPIROSTACHYAE.--[+] 1. _Granulares_.

60. C. granularis, Muhl. Erect or spreading, 8'--2 deg. high, somewhat glaucous; leaves flat, various; bracts broad and long, much exceeding the culm; spikes 3--4, scattered, all but the upper peduncled, erect or ascending, compact, short-oblong to cylindric, never exceeding 1' in length; staminate spike small and usually sessile; perigynium ovoid, very strongly nerved, the nearly entire short beak usually bent; scale thin and pointed, about 1/2 the length of the perigynium.--Moist grassy places; common.--Var. HALEANA, Porter. Habitually lower and more slender; radical leaves very broad (3--4'') and more glaucous; pistillate spikes 1/2' long or less, thinner; perigynium a half smaller, narrower. Wisc. to Va.; infrequent.

61. C. Crawei, Dewey. Low, strict, stoloniferous (4--12' high); leaves narrow; bracts scarcely exceeding the culm; spikes 2--4, scattered, the lowest radical or nearly so, short-peduncled or the upper sessile, erect, compact, 9'' long or less; staminate spike generally peduncled; perigynium ovate, usually resinous dotted, obscurely or few-nerved, very short-pointed, longer than the obtuse or short-pointed scale.--Moist places, N. Y. to Ill. and Minn.; local, especially eastward.

[*] 5.--[+] 2. _Extensae_.