874 POACE.B. 



Low grounds, Now York, to Illinois and souUiwurd. 



2. T. Ludovicianum Viiany. lUiU. Torr. Club, 1!»:«) (1S85). 

 Ciilnia GO-SO uni. Iiigli. sniootli, loafv Some of the lower I)liide8 



15-;.*.") (;ni. long, the upper larger, with smooth Hhealha. I'unicle 

 15-^5 em. long, ahout \i cm. wide, nearly erect, rather loose, rays 

 mostly in lives. Spikelets "-i-y-llowered, the lower floret unawncd, 

 rachilla stout, very sparsely hairy, raising the lower floret two-thirds 

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

 glume or a floret. Knipty glumes smooth, e(puil, ahout 5 mm. 

 long, 3-nerved, acute, first ellijitical-lanccolate, second ohovate; 

 floral glume scabrous, y-nerved, not bifid, th t ot" the lower floret 

 nearly (J mm. long, elliptical-lanceolate, umiwned; second floral 

 glume snuiller, with a bent awn sis long as itscilf, arising 1 mm. 

 below the acuminate apex; })aleiM broad, one-third shorter than 

 their glumes, bifid, the two nerves widely diverging. 



Nearly allied to T. paltislrc. E. llackel considers it a species 

 of Vfutetiala. 



Louisiana. AV/-. .1. li, fjfii(/Iois. 



3. T. deyeuxioides (H. B. K.) Knnth, Kev. T.ram. 1:102 

 (1820). Arnia <In/i'ii.rioiih-s H. K K. Nov. fJen. et Sp. 1 :14:. /. 

 687 (1815). Deffeiixia frijiora Noes, in Linniwi 19: 691 (1847). 



Culms 00-90 cm. high. Leal-blades of the culm 12-18 cm. 

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

 with s])ikelike rays. Spikelets purjilish, 2-3-flowered, rachilla 

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

 the tip of the florets; empty glumes lanceolate, erpnd, G-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 Deyetixia and 

 Trisetnm. 



Mexico, Pringh 821. Palmer 210. 



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

 icle pubescent. 



