MANUAL OF THE GRASSES OF THE UNITED STATES 509 



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 Xew Mexico. 



Chloris radiata (L.) 

 S w a r t z . 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 truxcata 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. TKICHLORIS Fourn. 



Figure 1077. 



-Chloris latisquamea 



(M earns 1233, Ariz.) 



Panicle, X 1; florets, X 5. 



iSS^ 



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 plurijlora. Name from 

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

 3-awned. 



Spikelets 2-flowered, both lemmas with 3 long awns 1. T. mexdocixa. 



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

 sometimes obsolete 2. T. pluriflora. 



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

 X 5. (Hitchcock 5497, Tex.) 



