472 POACEiE. 



high. Culms solid, scabrid, nodes smooth or sparingly pubescent. 

 Sheaths mostly longer than the internodes; ligule truncate, ciliate, 

 1 mm. long; leaves of sterile shoots erect, slender, often breaking 

 at the top of the sheath, those of the culm 4 in number, blades 

 rigid, scabrid, involute, pungent-pointed, 20-30 cm. long, less than 

 1 mm. diam. Panicle slender, erect, spikelike, interrupted, 10-20 

 <?m. long. Spikelets linear, purplish, nearly terete, 6- 11 -flowered, 

 12-17 mm. long; empty glumes linear-lanceolate, 1-nerved, first 

 5.5-6.5 mm. long, second 6.5-7.5 mm. long; floral glume linear 

 or oval, emarginate, awnless, pubescent on the nerves, 5.5-7 mm. 

 long; palea elliptical, pubescent on the keels, 3.5-4 mm. long. 



Texas, Beverclion for IT. S. Dept. Agricul. 239; Arizona, 

 Fringle in 1882: Mexico (Chihuahua), Pringle 405, Palmer 2220. 

 Texas to Arizona and Mexico. 



108. (261a). Redfieldia Yasey, Bull. Torr. Club, 14:133 

 (1887). 



Spikelets 3-5-fiowered, pedicellate in a lax spreading panicle 

 half or more than half the length of the culm, rachilla short, ar- 

 ticulate under the floral glumes, beset with white hairs. Empty 

 glumes about half as long as thespikelet, ovate-lauceolate, 1-nerved; 

 floral glume compressed, rather rigid, ovate-lanceolate, 3-nerved, 

 the mid-nerve curved, the lateral nerves prominent and midway 

 to the margin, base more or less pubescent; palea equalling or longer 

 than its glume, of nearly the same texture, 

 folded lengthwise in the middle and with two 

 prominent keels folded in the opposite di- 

 rection. 



Dr. Vasey believes it nearest allied to Fes- 

 tuca, from which it differs in having the 

 flowers crowded on the rachilla, in the 1- 



nerved empty glumes, in the pointed or coni- 

 FiG. M.— Redfieldia flex- ^ a ^ ^ t i i ii -u i j 



uosa. A, sijikelet; a, cal floral glumes, not rounded on the back and 

 floret. (Scribner.) ^j^iy 3-nerved. 



Named for the late J. H. Eedfield of Philadelpliia. 

 1. R. flexuosa (Thurb.) Vasey 1. c. Graphephorum {?)Jlexuosum 

 Thurb. Proc. Phila. Acad. 78 (1863). 



