A<iU(>STII»K.K. 248 



loii^rer than tlie intevnodes; ligulc lanooolate, lO-l'^ mm. long; 

 li'jivcs of sterile shoots numorous, the Idiidea firm, Hat or iiivoliito, 

 l{(M() cm. long, 2-U.5 mm. wide, those of the culm *^*-3 in niiniher. 

 I'iinioles pale straw-colored, strict, 1'2-lH cm. long, rays up|»res3cd, 

 single or in pairs, densely flowered to near the base, the longest 4-5 

 cm. long. Spikelets sub.sossile or on rather stout pedicels, 1-3 mm. 

 long; empty glumes sometimes tinged with purple, Iniu'eohite, first 

 l-nerved, 4-4.5 mm. long, second 3-nerved, 6-0 mm. long, apex 

 sometimes 3-toothed; lloral glume pilose for the lower two-thirds, 

 rather firm, ovate- lanceolate, 4 mm. long, the awn 13-20 mm. long; 

 palea pilose, narrowly linear, acute, as long as its glume. Stamens 

 3 mm. long, (^rain linear, terete, 2 mm. long. 



Arizona, Priiif/Je. 



New Mexico, Arizona, and Mexico. 



9. M. firma. .1/. smht'it Scribn. n. sp. ined. 



A rather stout erect tufted perennial, 90 cm. high. Ligule 

 firm, acute, 10-18 mm. long; blades firm, closely involute, sca- 

 brous, 20-35 cm, long, pungent pointed, 1-15 mm. diam. Panicle 

 brownish purple, erect, spikelike, the base very thin and inter- 

 rupted, 15-18 cm. long, 1-2 cm. diam. Spikelets olive-brown, 

 empty glumes equal, 3.5-4 min. long, first l-nerved, second 2- 

 nerved; floral glume 5-5.5 mm. long, 3-nerved, the stout awn 

 1-3 mm. long; palea nearly as long as its glume. 



The specific name proposed by Scribnor luid been used by S. 

 Watson, Proc. Am. Acad. 17: 174 (1883). 



Growing at the altitude of 10,500 feet. 



Mexico (Oaxaca), Pr ingle 4914. 



Scribner identifies it as Tiear M. Palmeri Vasey, from which it 

 differs in having a much longer ligule, second glume two-nerved, 

 floral glume longer, awn shorter. 



10. M. ciliata (11. & K.) Trin. Unifl. 103 (1826). Poilosmmm 

 ciUatnm II. B. K. Nov. Gen. et Sp. 1 : 128 (1815). 



A very slender geniculate or diffuse light green or reddish an- 

 nual, branching near the base, the culms and leaves more or less 

 pubescent with very short fine hairs. Sheaths half as long as the 

 internodes; ligule a ciliate ring; blades thin, convolute, invo- 



