586 FLORA OF TEXAS. 



perianth of 4-6 bristles, which are dilated and connate at 

 the base; stamens 3; style elongated, entire or slightly 

 2-cleft at the apex ; nut compressed, crowned with the 

 persistent and hispid lower half of the style. Perennials. 

 Culms ioiwiQii, leafy; sjnkes scattered in an open corymb, 

 or clustered in a globose head. 



C. CORNICULATUS, Nees. Culms stout (3°-4° high), 

 3-angled; leaves flat, scabrous on the edges (6"-10" wide) ; 

 corymbs 3-5, erect, compound; sioikes brown, ovate-lanceo- 

 late; style very long, the lower and persistent portion up- 

 wardly scabrous ; met narrowly obovate, smooth, the sides 

 concave and minutely dotted ; bristles 5-6, rigid, smooth- 

 ish, half as long as the nut; tubercle subulate, 3-4 times 

 the length of the nut. (Rhynchospora longirostris. Ell.) 

 Ponds and ditches. 'July-September. Leaves l°-2° long ; 

 nut and tubercle nearly 1' long. 



CLADIUM, Browne. 



Spikes ovate, 1-2-flowered ; scales loosely imbricated, the 

 lower ones empty ; 7:?erm??Y/i none ; stamens 2 ; style 2-3- 

 cleft, the divisions often 2-3-cleft, deciduous; nut globose- 

 ovate, the pericarp thickened and corky near the apex; 

 tubercle none. Culms tall ; spikes disposed in axillary and 

 terminal cyme-like panicles. 



0. EFFUSU^, Torr. (Saw-grass.) Culms (4°-8° high) 

 nearly terete; leaves linear, elongated, saw-edged; panicles 

 numerous, diffuse; spikes small, 3-4 in a cluster, deep 

 brown; scales about 6, the uppermost bearing a perfect 

 flower, the next below staminiferous, the others empty; 

 nut ovate, pointed, wrinkled. (Schoenus effusus, Swartz.) 

 Tresh or brackish marshes along the coast. July and 

 August. 



SCLERIA, L. NuT-KUSH. 



Floioers monoecious; sterile spike few-many-flowered; 

 scales loosely imbricated in 2-3 rows; fertile fowers soli- 



