374 POACE^. 



Low grounds, New York, to Illiuois and southward. 



2. T. Ludovicianum Vasey, Bull. Torr. Club, 12 : 6 (1885). 

 Culms 60-80 cm. high, smooth, leafy. Some of the lower blades 



15-25 cm. long, the upper larger, with smooth sheaths. Panicle 

 15-25 cm. long, about 3 cm. wide, nearly erect, rather loose, rays 

 mostly in fives. S^iikelets 2-3-flowered, the lower floret unawned, 

 rachilla stout, very sj)arsely hairy, raising the lower floret two-thirds 

 of 1 mm., second 2 mm. higher, the rudiment sometimes bearing a 

 glume or a floret. Empty glumes smooth, equal, about 5 mm. 

 long, 3-nerved, acute, first elliptical-lanceolate, second obovate; 

 floral glume scabrous, 3-nerved, not bifid, that of the lower floret 

 nearly 6 mm. long, elliptical-lanceolate, unawned; second floral 

 glume smaller, with a bent awn as long as itself, arising 1 mm. 

 below the acuminate apex; palefe broad, one-third shorter than 

 their glumes, bifid, the two nerves widely diverging. 



Nearly allied to T. jJalustre. E. Hackel considers it a species 

 of Ventenata. 



Louisiana, Rev. A. B. Langlois. 



3. T. deyeuxioides (H. B. K.) Kunth, Eev. Gram. 1:102 

 (1829). Aimia deyeuxioides H. B. K. Nov. Gen. et Sp. 1 : 147, t. 

 687 (1815). Deyeuxia triflora 'Nees, in Linnsea 19: 691 (1847). 



Culms 60-90 cm. high. Leaf-blades of the culm 12-18 cm. 

 long, 3 mm. wide. Panicle 15-25 cm. long, 2-4 cm. broad, loose 

 •with spikelike rays. Spikelets purplish, 2-3-flowered, rachilla 

 clothed with numerous long bristly hairs, some of which extend to 

 the tip of the florets; empty glumes lanceolate, equal, 6-7 mm. 

 long, 1-nerved; floral glumes narrow, 3.5-4.5 mm. long, 5-nerved, 

 bearing an awn near the middle, reaching about 4 mm. above the 

 nerveless tips of the glumes; palea hyaline, lanceolate, three-fourths 

 as long as its glume. Grain linear, 2.5 mm. long, acute at the 

 base. 



The plant is evidently intermediate between Deyeuxia and 

 Trisefum. 



Mexico, Pringle 821, Palmer 210. 



Var. pubescens Scribn. ined. Leaves and branches of the pan- 

 icle pubescent. 



