472 



POACE.E. 



high. Chihiis solid, scabrid, nodes sniootli or sparingly pubescent. 

 Shoatlis mostly longer than the internodes; ligule truncate, eiliute, 

 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, pungehc-pointed. 20-30 cm. long, less than 

 1 mm. diam. Panicle slendi.'r, erect, s])ikelike, interrupted, 10-20 

 cm. long. Spikelets linear, purplish, I'.early terete, 0-1 1 -flowered, 

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

 5.5-().5 mm. long, second 0.5-7.5 mm. long; floral glume linear 

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

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



Texas, Ncrerrfinn for V. 8. Dept. Agricul. 2:5!): Arizona, 

 Priiiglc'm 1882: Mexico (Chihualuia), Pn'>i(jlc iOb, Pahiier 2'ZW. 

 Texas to Arizona and ^lexico. 



108. (2Gla). RedFIELDIA Vasey, Bull. Torr. Club, 14:133 

 (1887). 



Spikelets 3-5-flowercd, pedicellate in a lax si)reading panicle 

 half or more than half the length of the culm, raciiilhi sliort. ar- 

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

 ghuues about half as long as thespikelet. ovate-laiu'colate, l-nerved; 

 floral glume com})ressed, rather rigid, ovate-lanceolate, 3-nerved, 

 the mid-nerve curved, the lateral nerves i)romini'nt and midway 

 lo the margin, base more or loss pubescent: palea equalling or longer 



than its glume, of nearly the same texture, 

 folded lengthwise in the middle and with two 

 ])rominent keels folded in the o})posite di- 

 rection. 



I>r. Yasey believes it nearest allied to Fes- 

 tuca, from which it differs in having the 

 flowers crowded on the rachilla, in the 1- 



nerved emptv glumes, in the pointed orconi- 

 Fir.. U.-ltedfieldia Jkx- , ,, ' ' , , i „ , , , 



uom A, si)ikelet; a, cai floral glumes, not rouiideu on tlie back and 

 fl..n.t. (Scribiier.) q,j,^, 3-ncrved. 



Named for the late J. II. IJedtield of Philadel])hia. 

 1. R. flexuosa (Thurb.) Vasey 1. c. Grapheplwrum {'^)Jlexuosum 

 Thurb. Proc. Phila. Acad. 78 (1803). 



