FESTUCE.E. 483 



nerves prominent, smooth, 2.7-3.2 mm. long; palea incurved, 

 emarginate, ciliatc ou tlie keels, 2-2.3 mm. long. Grain oval, 

 slightly compressed, 1 mm. long more or less. 



Texas, Hall 781, Liudheimer 734, 735, Palmer 1370, Reverchon 

 for U. S. Dept. Agricul. 584, Pringle 1960, Nealley; Mississippi 

 (Ocean Springs), Tracy; New Mexico, Fendler 913. 



Mississippi, Texas, and New Mexico. 



12. E. tenuis (Ell.) A. Gray, Man. Ed. 2, 564 (185G). Poa 

 tenuis Ell. Fl. S. C. & Ga. 1: 156 (1817). 



Erect tufted perennials, 60-120 cm. high. Sheaths smooth or 

 more or less softly tomentose, the lower ones leaving the culm, 5-30 

 cm. long, the upper extending a third to half the height of the 

 plant, throat ciliate ; ligule a mere ring ; blades smooth, firm, invo- 

 lute with long slender tips, 30-60 cm. long, 3-5 mm. wide at the 

 base. Panicle usually but little exserted, open, ovoid or linear, 

 30-75 cm. long, rays numerous, mostly single, sometimes bearded 

 in the axils and with many capillary branches, the longest often 20 

 cm, long. Spikelets on very slender pedicels, 2-20 cm. long, some- 

 what flattened, oval or linear, 2-6-12-floAvered ; empty glumes 

 1-nerved, lanceolate or awl-shaped, first 1.5-2.5 mm. long, second 

 2-3 mm. long; floral glume with three strong nerves, ovate-acute or 

 ovate-lanceolate, 2.5-3 mm. long; palea slightly incurved, oval 

 when spread, obtuse, nearly as long as its glume. Grain subglo- 

 bose, with a slight groove on one side, 1 mm. long. 



niinoife, Geyer, Patterson; Texas, Drummond 736, Lindheimer, 

 Nealley; New Mexico, Wright 771, 1317. 



Sandy soils. New England to Texas and New Mexico. 



13. E. erosa Scribn. ined. 



A tufted jierennial, about 90 cm. high. Sheaths smooth; ligule 

 bearded; blades involute, rigid, smooth below, 30-40 cm. long, about 

 3 mm. Avide. Panicle diffuse, ovoid, 30-40 cm. long, rays diverg- 

 ing, some of them in twos and threes, sparingly branched, branches 

 capillary and bearing 2-5 pedicellate spikelets. Spikelets light lead- 

 color, moderately flattened, linear, 4-12-flowered, 6-12 mm. long; 

 empty glumes smooth, thin, ovate, 1-nerved, first about 1.6 mm. 

 long, second about 3 mm. long; floral glume broadly ovate, obtuse 



