x^N 1)H01»0U( )N ILE. 45 



(1875-70). J. tvncUus Pmsl. Rclici. Ilivnk. 1: :}35 (1830). Blados 

 obtuse. ~-o cm. long, 1.5-5 inin. wide. Hueciuos very sloiulor. \-l 

 cm. long ; sjKitlic 1.5-'^ cm. long. Sessile spikclcts ;]-• 1 mm. long, 

 the iiwn 8-12 mm. long. 



Mexico, PniKjb 1771. 



^lexico to Brazil, Madugiiscar, India. China, and other coun- 

 t ries. 



•1. A. tener Knuth. Rev. Gram. % 5(15 /. 1!)7 (18-^9). 



Culms very slender, 20-70 cm. high, branching s})aringly, the 

 exserted threadlike tips 2-10 em. long, each carrying a single 

 narrow spike l-O em. long. Sheaths of culm almost carinate; 

 lignle truncate, glabrous, very short; blades destitute of hairs, the 

 lower ones 2-5 cm. long, 0.!(-2 mm. wide, the upper bristlelike, 

 1-2 cm. long. Short hairs on the rachis below the sessile spike- 

 lets. Stipe 3-(l cm. long, sj)ariugly clothed on one edge with short 

 hairs, each spikelet subtended by a short 2-i)ointed bra(!t. The 

 first glnme of the sessile spikelet ovate-lanceolate, 4-5 cm. long, 

 llattened. 2-keeled, obscurely 7-nerved; se(M)nd glnme as long iis the 

 first, compressed-keeled, )5-nervod, fourth bearing a twisted awn 8-14 

 mm. long. Anthers 2 mm. long. Pedicellate spikclets flattened, 

 ;j-5 mm. long, of 2-3 glumes only. It resembles considerably A. 

 eirni/ns J Tack. 



Mexico, Pahiier 504. 



Florida to Texas a,iid ^rexlco. 



Var. flliformis (Nces) Hack. T). C. Monog. Phan. fi : 379 

 (188'.t). Schizid'lijiriiiDi Jilifoi'me Nees, Agrost. Mras. 338 

 (I82'.t). Culms tiliforui. 40-(!0 cm. high, branching from the base; 

 Iciif-bladcs convolute, filiform. 0.4-0.5 mm. diam. ; spikes. 3-4 cm. 

 long. 



Florida, (fiir/iss ; Miss., 7'niri/. 



A. cirratus Hack, in Flora (IS : 11!) (1885). 



IMant glaucous. Culms sparingly branched, thread-like, t'x- 

 serted, 3-5 cm. long, each bearing a single spike 4-(i cm. long. 

 Slieaths terete: lignle 2 mm. huig: blade very sjtaringly hairy, the 

 "idwcr iind middle oiu's Id 15 cm. lung, 3 mm. wide, the upper 

 rarely 2 cm. bing. Spiki'S single, tlie rachis at each node and 



