74 TRIANDRIA. DIGYNIA. 



B. Flowers polf/^anious. 



t, Pqnicled, 



48. PANICUM. 49. HIEROCHLOAr 



50. H0LCU5. 



ft. Spiked. 



* With an involuerum, 



51. SETARIA* 



** Without an involuerum* 



52. DieiTARIA. 53. ANDROPOaON, 



54. HORDEUM. 



1. LEERSIA. Swartz, 



Calyx 0. Corolla (calyx, Trin.) 2-valved, closed j 

 valves compressed, boat-shaped. Nectaries obovate, 

 entire, collateral, Swarjz Prod. p. 21. Gen. pL 

 105. (subAspRELLA.) NutL Gen. I. p. 43. Tri- 

 nius Agrosto^raph. 34. Asprella Lam. III. n. 858* 

 Roem. y Schult. Gen. 208. P. de Beauv. 1. Co 

 t. IV. f. 2. Vhalaridis spp. Lin. Homalocen- 

 c H R u s Ha Her. Flowers panicled. Rice- grass, 



1. L. virginica Willd,: panicle simple; the lower 

 branches diffuse ; flowers appressed, monandrous, sparingly 

 ci iate on the keeh Willd. Spec. I. p. 325. Elliott Sk. 

 1. p. 100. Muhl. Gram. p. 100. Asprella virginica 

 Roem. 4r Schtilt. l\. p. 266. h. monaridra Swartz 

 prod. p. 21 ? Oryza glumis carina hispidis Gron, Virg, 

 153. 



Root fibrous, perennial. Culm 2—4 feet high, geniculate, 

 branched, erect or decumbent, pubescent at the joints. Leavee 

 linear-lanceolate, about 6 inches long, 2 — 3 lines wide, sca- 

 brous, slightly ciliate on the margin. Sheatha deeply stri- 

 ate, a little roughened by nninute hooked prickles, rarely pu- 

 bescent. Stifiuh short, truncate, membranaceous. Panicle 

 terminal, much exsert; branches few and solitary. Florets on 

 short, appressed, flexuous racemes, pedicellate ; valves bent 

 round and partly embracing the common peduncle, imbricate, 

 covered with impressed dots ; the inferior valve boat-shaped, 

 acuminate, ciliate on the keel ; the superior linear-lanceolate. 

 SramttnX. (Stamens 2. Muhl.) Styles 2 \ stigmas IcdXhtvcA^ 

 white. Seed oblong. 

 Hab. In wet woods and along the borders of swamps. Au- 

 gust. Whice-graee, 



