MANUAL OF THE GKASSES OF THE UNITED STATES 183 



5. Uniola sessiliflora Poir. (Fig. 362.) Culms erect, 0.5 to 1.5 

 m tall, in loose tufts with short rhizomes; sheaths pilose, at least 

 toward the summit; blades elongate, firm, mostly sparsely pilose on 

 the upper surface toward the base, 5 to 10 mm wide, tapering to base; 

 panicle long-exserted, 20 to 50 cm long, narrow, the branches distant, 



stiffly ascending or appressed, 

 the lower as much as 7 cm long, 

 the upper short, somewhat capi- 

 tate; spikelets nearly sessile, 

 aggregate in clusters, flat, usu- 

 ally 3- to 5-flowered, broadly 

 V-shaped at maturity, the first 



Figure 361. — Uniola ornithorhyncha. Plant, X 1; 

 floret, X 5. (Tracy and Lloyd 448, Miss.) 



Figure 362.— Uniola sessiliflora. Plant, X 1; 

 floret, X 5. (Tracy, Miss.) 



lemma empty; glumes about 2 mm long; lemmas spreading, about I 

 mm long, acuminate, beaked, especially before maturity, striate 

 nerved; palea shorter than the lemma, acute, broad, the keels narrowly 

 winged ; grain black, 3 mm long, at maturity spreading the lemma and 

 palea. % (U. longifolia Scribn.) — Rich woods, southeastern 

 Virginia to Tennessee and Oklahoma, south to Florida and eastern 

 Texas (fig. 363). 



