North American Cyperacea. 437 
1 — 2 inches long. Heads half an inch in diameter. Spikelets of a dull 
greenish white colour, mixed with yellow. Scales quite distinct, sj)read- 
ing almost horizontall}' ; the upper half distinctly recurved. Stamens 
always solitary. Nut greenish, somewhat obovate. 
Hab. Texas, T. Drummond! (Coll. III. no. 450.) 
Obs. Allied to C. vircns, but easily distinguished from the 
other species of the section to wliich it belongs by its slender 
culms, narrow leaves, and distinct scales. 
Carex Drummoxdii, Torr. 4' Hool-. 
Culm tall and very slender, very acutely triangular, the sides 
concave ; umbel simple, 5 — 6-rayed ; rays very short ; heads 
subglobose, composed of many crowded spikelets ; involucre 
2-leaved, longer than the umbel ; spikes 20 — 30-flo\vered, 
much compressed ; scales lanceolate, strongly appressed, acute, 
slightly spreading at the tip; interior scales ; stamen soli- 
tary ; nut oblong, acute at each end, papillose in lines. 
Culm 3 — 4 feet high ; the angles almost winged, sharp, and scabrous. 
Leaves much shorter than the culm, 2 — 3 lines wide. Rays of the 
umbel very short, so that the heads appear almost sessile. Heads 
nearly an inch in diameter, composed of about 40 — 50 radiating spike- 
lets. Spikelets ovate-Ianceola'e, nearly one -third of an inch long, rather 
obtuse, of a pale yellowish colour. Scales somewhat coriaceous, very 
closely imbricated, with '.i obscure nerves, the points slightly bent out- 
wards. Interior scales indistinct, forming a mere zig-zag line on the 
rachis. Stamen always solitary. Nut with 3 nearly flat sides, con- 
tracted at the base into a sort of pedicel ; the surface roughened with 
minute papillse arranged in lines. 
Hab. Texas, T. Drummond ! (Coll. I. without a num- 
ber.) 
Obs. The spikes have a very neat appearance, much like 
those of some species of Eragrostis It is nearly allied to C. 
aureus, H. B. ^ K. 
