108 POACK.E. 



Florida, Curtiss Wll, Chtrk 5050. 



Low pino-lmrrt'iis. South Curoliim to Florida. 



5. A. appressa N'asev, ("ontril). U, S. Nat. Herb. 1 : 283 (1893). 



Culms sli'iuU-r, (JO-ISO cm. lii;;li. Tiowor leaves uot seen, the up- 

 per narrowly setaceous. 10-1, "» cm. lon<r. I'anicle narrow, !.*0-30 em. 

 lonjr, naked below. Empty <,dumes setaceous, suboqual, about 10 

 mm. lon^'; floral glume 30 mm. Inn":, ])iirple, beak somewhat 

 twisted; awns nearly equal, 10-1'^ mm. long. 



Alexico, Pidntcr in 1IS85. 



The long stilT culms are tied together by the natives for brooms. 



Var. brevior ^'asey 1. c. 



Culms tufted, 00-90 cm. high. Leaves of culm 3-4; sheaths 

 glabrous; ligule obsolete; blades Hat or involute, 15-'^ 5 cm. long. 

 Piinicle 17-24 cm. long; rays aj)pressed. S])ikelets nearly as in the 

 l)receding, but the floral glume a little longer than the emi)ty ones; 

 awns a little longer, 



Mexico (Hio Blanco), Ptiliiwr 510. 



0. A. Arizonica Vasey, Hull. Torr. Club, 13:27 (1880). 



An erect smooth unbranched grass. 30-00 cm. high. Ligule 

 short; leaf-blades of the culm usually four, ])ecoming involute. 10- 

 20 cm. long. Panicle much exserted, narrow, simple, 10-25 cm. 

 long, the lower internodes 5-7 cm. long; rays in twos below, the 

 longest 8-10 cm. long, bearing a fewspikelets along the upper half. 

 Empty glumes nearly equal, hispid on the keels, toothed, 14-15 

 mm. long, besides the very short awns, first 1-nerved, second 1-3- 

 nerved; floral glume including the hairy-beaked callus and the 

 twisted apex to the base of the separate awns about 15 mm. long; 

 awns divergent, the lateral ones 2 cm. long, the central a little 

 longer. 



Dr. Vasey says: " This species differs from A. purpurea 'Knit., 

 in a more rigid habit, longer leaves, more erect and rigid panicle, 

 and especially in the comparative length of the glumes, in the larger 

 flowering glume, and in the shorter awns." 



New Mexico. Vaxeji; Texas. Xealley. 



Texas to Californiu. 



7. A. Reverchoni Vasey, liull. Torr. Club, 13: 52 (1886). 



