2(\6 POAfE.E. 



lij^nle lascoriito, 1.-5 mm. Icniii : blades of tlio culm soiibrous, eroct, 

 setaceous, (I-IO cm. Ion*:, tlio.^e of the sterile shoots about 1 cm. 

 loujf. Panicle narrow, thinly spikelike, 10-15 cm. lon<j:, rays 

 mostly in twos, appressed, llower-hearin<j: at the base, the longest 

 '.\-o cm. long, branches closely ilowered. Spikelets on very 

 short i)edi(!els or sessile; em})ty glumes c(|ual. ovate-lanceolate, 

 acuminate or awl-jjointed, 1-nerved, ;.'-;.'. 5 mm. long; iloral glume 

 sparingly liairy at base, linear-lanceolate, o-nerved, al)out 4 mm. 

 long, the awn ti-l'-l mm. Ittng; palea linear, nearly as long as its 

 glume. 



Kew ^lexico. r. S. Depf. ^tt/rind. from Vasey. 



New Mexico and Arizona, on rocky hills and mountain-sides. 



o(i. M. longiglumis Vasey, Contrib. U. S. Nat. Herb. 1:28:! 

 (180:J). 



A rather sleiuler tufted unbranched light green perennial. 

 00-100 cm. high. Culms solid, 'i'he ui)per sheaths spreading from 

 the culms and involute; ligule thin, decurrent, and o-S mm. long; 

 blades of the sterile shoots conduplicate, scabrous, thickly clothed 

 with silky hairs. 30-40 cm. long, 2 mm. wide, those of the cidm 

 about '.\ mm. wide. Panicle often purplish, slender, loosely spike- 

 like, 20-40 cjn. long; rays scattered, numerous, appressed, sparing- 

 ly brauchod, the longest about 4 cm. long, bearing 5-8 scattered 

 spikelets. Spikelets on pedicels mostly about 1 mm. long; empty 

 glumes scabrid or pubernlent, thin, sube(|ual, lanceolate, obscurely 

 1-nerved, 5.5-0 mm. long; floral glume ovate-lanceolate when 

 spread, obscurely 3-nerved, 4-5 mm. long. 2-toothed. awn "~*-0 cm. 

 long; palea acute, as long and as broad as its glume. Anthers 3 

 in number, nearly 3 mm. long. 



Mexico, P<(h)}('r TOO, Pnnyle 2305. 



57. M. Trinii Fouru. llemsl. Jiiol. Centr. Am. Bot. 3:543 

 (1880). Braclnn'hjlnun Pritujlei Vasey, ined. 



A very slender ditTuse grass, 20-40 cm. high. Sheaths and 

 nodes mostly pubescent; ligule ciliate, less than 1 mm. long; blades 

 mostly inibescent, flat, acuminate, 2-4 cm. long, about 2 mm. wide. 

 Panicle termimil and axillary, the ;atter mostly enclosed by tlie 

 sheaths, the former exserted, 8-12 cm. long. Spikelets racemose 



