MANUAL OF THE GRASSES OF THE UNITED STATES 509 



Figure 1077.— Chloris latisquamea. Panicle, X 1; florets, X 5. 

 (Mearns 1233, Ariz.) 



blades 1 to 2 mm wide as folded, the uppermost often much reduced ; 

 spikes numerous, 2 to 5 cm long, digitate, radiating, flexuous or curled ; 

 spikelets crowded, stramineous, turning fuscous at maturity, tri- 

 angular, about 2 mm long and about as broad ; rudiment prominent, 

 compressed-cupshaped, about 1.5 mm wide, the awns of lemma and 

 rudiment about 1 mm 

 long. % — Plains and 

 sandy barrens, Texas 

 and New Mexico. 



Chloris radiata (L.) 

 Swartz . Weedy 

 branching annual; 

 culms 30 to 40 cm long, 

 decumbent; blades 

 thin, 2 to 3 mm wide ; 

 spikes slender, several 

 to many, 3 to 8 cm 

 long ; lemma narrow, 

 2.5 mm long, the nar- 

 row rudiment mostly 

 included in its margins ; 

 awns of lemma and rudiment very slender, 5 to 10 mm long. 

 O — Ballast, near Portland, Oreg.; tropical America. 



Chloris truncata R. Br. Stoloniferous perennial; culms erect, 10 to 30 

 cm tall; spikes 6 to 10, 7 to 15 cm long, horizontal or reflexea; spikelets 3 mm long, 

 the awns 6 to 12 mm long. % — Occasionally cultivated for ornament under 

 the name stargrass. Australia. 



103. TRICHLORIS Fourn. 



Spikelets 2- to 5-flowered, 

 nearly sessile, in two rows 

 along one side of a continuous 

 slender rachis, the rachilla 

 disarticulating above the 

 glumes and prolonged behind 

 the uppermost perfect floret, 

 bearing a reduced, usually 

 awned floret; glumes unequal, 

 acuminate, or short-awned, 

 the body shorter than the 

 lower lemma; lemmas nar- 

 row, 3-nerved, the midnerve 

 and usually the lateral nerves extending into slender awns. Erect, 

 slender, tufted perennials, with flat scabrous blades and numerous 

 erect or ascending spikes, aggregate but scarcely digitate at the 

 summit of the culms. Type species, Trichloris pluriflora. Name from 

 Latin tri, three, and Chloris, a genus of grasses, the lemmas being 

 3-awned. 



Spikelets 2-fiowered, both lemmas with 3 long awns 1. T. mendocina. 



Spikelets 3- to 5-flowered, the lateral awns of the lemmas more or less reduced, 

 sometimes obsolete 2. T. pluriflora. 



Figure 1078.— Chloris cucullata. Panicle, X 1; florets, 

 X 5. (Hitchcock 5497, Tex.) 



