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MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 





Figuke 723.— Leptochloa virgata. Panicle, X 1; floret, X 10. (Wilson 9402, Cuba.) 



as 10 cm. long, usually ascending or 

 appressed, or at maturity spreading; 

 spikelets usually overlapping, 7 to 12 

 mm. long, 6- to 12-flowered; lemmas 

 4 to 5 mm. long, the lateral nerves 

 pubescent below, acuminate, the awn 

 from short to as long as the body. 

 O (Diplachne fascicularis Beauv.) 

 — Brackish marshes along the coast, 



the panicle more oblong in outline, 

 with shorter, denser-flowered ra- 

 cemes; spikelets 5 to 7 mm. long, 

 6- to 9-flowered, lead-color; glumes 

 broader, more obtuse; lemmas 

 scarcely narrowed toward tip, apic- 

 ulate but not awned, the lateral 

 nerves more or less excurrent. O 

 (L. imbricata Thurb.) — Ditches and 



Figure 724. — Leptochloa domingensis. Panicle, X 1; floret, X 10. (Hitchcock 10055, Trinidad.) 



New Hampshire and New York to 

 Florida and Texas and in alkali flats, 

 ditches, and marshes, Ohio to North 

 Dakota; Washington and Colorado 

 to New Mexico, Arizona, and Cali- 

 fornia; south through tropical Amer- 

 ica to Argentina. A prostrate form 

 has been called Diplachne procumbens 

 (Muhl.) Nash and D. maritima Bickn. 

 8. Leptochloa uninervia (Presl) 

 Hitchc. and Chase. (Fig. 728.) Re- 

 sembling L. fascicularis, rather spar- 

 ingly branching, usually strictly erect, 



moist places, North Carolina; Missis- 

 sippi to Texas; Colorado and New 

 Mexico to Oregon and California, 

 south to Mexico; Peru to Argentina; 

 introduced in Maine, Massachusetts, 

 and New Jersey. 



9. Leptochloa nealleyi Vasey. (Fig. 

 729.) Annual, usually erect and rather 

 robust; culms mostly 1 to 1.5 m. tall, 

 simple or sparingly branching at base ; 

 sheaths glabrous or slightly scabrous, 

 mostly keeled ; blades elongate, flat to 

 loosely involute ; panicle commonly 25 



