448 



POACE^. 



long as tlie nodes, ciliate at the tliroat; blades involute, smooth be- 

 low, those of the cnlm 15-40 cm. long with filiform tips. Panicle 

 scarcely exserted, pale, 15-20 cm. long, 6-10 mm. wide. Spikelets 

 2-flowered; empty glumes very thin and scarious, 1-nerved, apex 

 irregularly 2-3-toothed, first 3 mm. long, second 3.5 mm. long; 

 floral glume broad, truncate, 2.2 mm. long, hirsute below on the 

 keel and lateral nerves, 5-7-nerved, awns about 17, the stouter 

 ones 4-5 mm. long. Grain 1.7 mm. long. 



Texas, Mallei/ for U. S. Nat. Mus. ; New Mexico, Wright 435, 

 2029; Mexico, Palmer 350, 1360, 1362, Frmgle 1973. 



Texas to Arizona and Mexico. Very nearly allied to, if not 

 identical with, P. laguroideum Schrad. 



2. P. Wrightii S. Wats. Proc. Am. Acad. 18:178 (1883). P. 

 horeale Torr., not Griseb. 



A rather slender branching erect or geniculate perennial, 20- 



40 cm. high; nodes villous. Sheaths 

 puberulent, ciliate at the throat; 

 blades involute, those of the culm 

 2-8 cm. long, 0.3-0.8 mm. diam. 

 Panicles terminal and axillary, often 

 more or less included by the sheaths, 

 lead-colored or pale, spikelike, 1-7 

 cm. long, 5-8 mm. diam. Spikelets 

 1-3-flowered ; empty glumes thin 

 and scarious, 5-7-nerved, acute or 

 toothed, sparingly puberulent under 

 a lens, first 3.5-4.5 mm. long, sec- 

 ond 1 mm. longer; floral gluma 

 hirsute on the central and lateral 

 nerves, oval, 2-mm. long, 9-nerved, 

 the 9 awns 3-5 mm. long. 



Texas, Havard, Jones; Arizona, 

 Pringle in 1884, Lemmon 3063; California (Los Angeles), Palmer 

 511. The latter says: "Pare, found only in the higher ridges 

 back of the bay." Mexico, Parry & Palmer 847, Palmer 1361. 

 Texas to Arizona, California and Mexico. 



Fifi. 88. — Papp ophor v. m 

 Wri(/htii. A, si)ikelet ; d, 

 florots; b, floral glume. (Scrib- 

 ner. ) 



