AOHOSTIDE.E. 20;*! 



eluding the 'i slender bristles; iiwn very slender, 10-20 mm. loni,'; 

 paleti laneeoliite, iioute, nearly as long as its glume. Anthers 3 in 

 number, 0.5 mm. long. 

 Mexico, Pn'tif/Ic 818. 



53. M. Palmeri Vusey, Bull. Terr. Club, 13:231 (1886). 



Culms rather stout, simple, erect, 05-120 em. high, from creep- 

 ing rootstocks. Ligule firm, 2 mm. long; blades firm, scabrous 

 al)ove, becoming involute or condu})licate, 30-(iO cm. long, the 

 jioint setaceous. Panicle often purple, erect, spikolike, 18-30 cm. 

 long, 1-2 cm. diam., rays very numerous, erect, mostly llower- 

 bearing to the base. Spikelets on pedicels 1—4 mm. long; empty 

 glumes sube([ual, 1-nerved, about two-thirds as long as the tlorcts, 

 including the awn-i)oint; Horal glume scabrous, oblong-lanceolate, 

 3-nerved, about 4 mm. long, apex 2-toothed with an awn 4-0 mm. 

 long; palea scabrous, linear, acute, as long as its glume. Nearly 

 allied to M. affinis Trin. 



Mexico. Pfingle 1417. 



54. M. pauciflora liuckl. Proc. Phila. Acad. 91 (1802). 



An erect perennial, rather sjiaringly branched for the whole 

 length, 50 cm. high: culms hard, sculjriil. nodes tumid: siieaths 

 mostly shorter than the internodes, some of them crowded ot? by 

 the branches: ligule lascerate, 1-1.5 mm. long; blades of the culm.-? 

 .smooth on the lower side, rather setaceous, O-K) cm. long, those 

 near the roots few and short. Panicle spikelike, slender. (i-S cm. 

 long, rays mostly single, a])pressed. tlower-bearing to the base, the 

 longest 2 cm. long. Spikelets on very short pedicels, emj)ty glumes 

 ef|ual, lanceolate. 1-nerved. 2.5 mm. htng; lloral glume with a few 

 short hairs at the base, linear-lanceolate, 3-norved, nearly 4 mm. 

 long, the awn S-12 cm. long; ])alea linear, 4 mm ig. 



Much like .)/. Xco-Mcjinina. of which it . perhaps only a 

 variety. 



Arizona, XeaUfi/ in 1801. 



55. M. Neo-Mexicana Vasey, Coult. Bot, fJaz. 11 : 337 (1880). 

 An erect i)erennial. branching near tiu' base. C'uims hard. 



•scabrous. 30-(;o cm. high. Siieaths longer than the internodes; 



