CYPEBACE^E. (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. Stolonfferous : 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 

 acheniurn, 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. 



- 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. Eeadily 

 distinguished by its flat culm. 



- - 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, 



