MANUAL OF THE GRASSES OF THE UNITED STATES 



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an axis mostly about half the entire length of the culm ; spikelets 3- to 

 4-flowered, 1 to 2 mm long, rather distant on the rachis; glumes 

 acuminate, longer than the first floret, often as long as the spikelet; 

 lemmas awnless, pubescent on the nerves, 1.5 mm long. © (L. 

 mucronata Kunth.) — Open or shady ground, a common weed in 

 gardens and fields, Virginia to southern Indiana and eastern Kansas, 

 south to Florida and Texas, west to southern California; Massa- 



Figure 1012.— Leptochloa virgata. Panicle, X 1; floret, X 10. (Wilson 9402, Cuba.) 



chusetts; throughout tropical America (fig. 1015). Much of the 

 material from the Southwest has shorter racemes. Smaller forms 

 occur throughout. These have been called L. attenuata (Nutt.) Steud. 

 6. Leptochloa viscida (Scribn.) Beal. (Fig. 1016.) Annual, freely 

 branching at base and from all the nodes, spreading or prostrate, the 

 foliage and panicles somewhat viscid; culms 10 to 30 cm tall; blades 



Figure 1013.— Leptochloa doming ensis. Panicle, X 1; floret, X 10. (Hitchcock 10055, Trinidad.) 



flat; panicles ovoid, rather dense, 1 to 8 cm long, tinged with purple, 

 included at base; spikelets 3 to 5 mm long, 5- to 7-flowered; lemmas 

 pubescent on the nerves, about 2 mm long, short-awned. © — Open 

 ground and waste places, New Mexico, Arizona, and northern Mexico. 

 7. Leptochloa fascicularis (Lam.) A. Gray. (Fig. 1017.) Annual, 

 somewhat succulent; culms erect to spreading or prostrate, freely 

 branching, 30 to 100 cm tall; blades flat to loosely involute; panicles 

 more or less included, mostly 10 to 20 cm long, often smaller, occa- 

 sionally longer, the racemes several to numerous, as much as 10 cm 



