CYPEKACE^J. (SEDGE FAMILY.) 391 



mens from an alpine ridge near Middle Park ( C. C. Parry] and from near 

 Mt. Gray (H. N. Patterson], Colorado, are probably to be referred here. The 

 specimens are peculiar for their upright habit, large and dark heads, and very 

 broad, inflated perigynia. 



62. C. Stenophylla, Wahl. Stoloniferous : culms stiff, 1 to 6 inches high 

 from a mass of fibrillose sheaths, usually longer than the stiff involute filiform 

 leaves: spikes 3 to 6, short (2 to 4 lines long), nearly globose, loosely conglomer- 

 ated into a small subglobose or shortly oblong head, each spike subtended by a 

 scarious mucronate bract of less than its own length : perigynium ovate, brown, 

 nerved, gradually contracted into a short, blunt, entire beak, tightly enclosing the 

 achenium, at maturity longer than the hyaline, brown, acutish scale. Dry hills 

 and mountains, New Mexico, Colorado, eastward and northward; also in 

 Iowa. (Eu.) 



C. TERETIUSCULA, Gooden., distinguished by small chestnut-colored spikes 

 disposed in an appressed or loose nearly simple panicle, will probably be found 

 in Montana. 



# # # * Spikes yellow or tawny when mature (in No. 63 often green], aggregated 

 into more or less compound heads or panicles : perigynium many-nerved, stipi- 

 tate, tapering from a spongy base into a more or less conspicuous beak. VUL- 

 PINE, Kunth. 



H- Beak shorter than the body of the perigynium. 



63. C. COnjuncta, Boott. Culms flat, about the length of the broad and 

 lax leaves : spikes 6 to many, loosely disposed into a long and interrupted 

 head, the lower branches of which are sometimes compound : perigynium ovate, 

 rough on the angles above, the base cordate on the outer side and conspicu- 

 ously white-thickened, broader and a little longer than the acute scale. 

 C. vulpina, Carey, etc., not L. Fort Pierre, Dakota (Dewey) : rare. Readily 

 distinguished by its flat culm. 



-*- -i- Beak twice or more the length of the body. 



64. C. Stipata, Muhl. Cespitose: culms thick and spongy, 1 to 2 feet high, 

 very sharply 3-angled, almost winged, about the length of the broad light green 

 canaliculate rough-edged leaves: spikes 10 to 20, loosely aggregated into an 

 oblong or pyramidal head (1 to 3 inches long), which is somewhat branching or 

 occasionally nearly simple at the base : perigynium lanceolate, finely nerved, the 

 rough beak about twice the length of the rounded base, the whole about twice (or a 

 little more) as long as the scale. Pastures and wet places throughout. 



65. C. crus-COrvi, Shuttl. Culms 2 to 4 feet high, stout, sharply angled, 

 leafy and glaucous : leaves 4 to 9 lines wide, glaucous : spikes very numerous, 

 disposed in a large panicle which is 4 to 9 inches long with the lower branches con- 

 spicuous and usually long : perigynium peculiarly corky-thickened and truncate at 

 the base, conspicuously few-nerved, the rough and slender beak thrice or more the 

 length of the body, the whole three or four times the length of the inconspicuous 

 scale. Indian Territory and southward. A conspicuous species with much 

 the aspect of Panicum crus-galli. 



* * * # Spikes yellow or tawny, aggregated into a long, appressed, compound 

 or rarely simple head: perigynium small, ovate, few-nerved or nerveless, 



