38 



PANICACE^. 



as a distinct species, and proposes the above name for our 



species. 



West Texas, Wright SO 4:-, New Mexico, Wright 210Q; Arizona, 



Lemmon 2936; Mexico, Pringle 423; Texas, Nealley, Havarcl; 



Arizona, Lane, Rothroch 638. 



Texas, Arizona, and northern Mexico. 



2. E. tripsacoides H.B.K. Nov. Gen. et Spec. 1 : 192 (1815). 



Andropogoii Nuttallii Chapm. FL S. States, 580 (1860). Eliomirus 



Nuttallii Vasey, Descr. Cat. Gr. U. S. 25 (1885). 



Culms erect, tufted, slender, compressed, sparingly branched from 



the upper 1-3 nodes, internodes but little longer than the sheaths 



70-120 cm. high. Ligule ciliate 

 with long hairs; blades filiform- 

 involute, glabrous or pilose, the 

 lower 15-50 cm. long, 2-4 mm. 

 wide, those of the middle of the 

 culm 30-50 cm. long, the upper 

 3-5 cm. long. Spikes axillary and 

 terminal, 5-14 cm. long. Sterile 

 spikelets 4-7 mm. long borne on 



Pig. \Z.-Elionurm tripsacoides. ^ ^^^iry pedicel 3 mm. long, first 

 Spikelets. (Richardson.) glume flattened, smooth, ovate-lan- 



ceolate, obtuse, 5-nerved besides the keel at each margin, second 

 glume as long as the first, elliptical-lanceolate, keeled near the apex, 

 3-nerved, third glume a little shorter, 2-uerved, fourtli still shorter. 

 Stamens 3. Sessile spikelets on an obovate callus, 1-1.5 mm. long, 

 densely barbate, flattened, 5-6 mm. long, smooth or scabrid, the 2 

 keels clothed with short hairs, first glume flat, narrowly ovate, 

 bifid, 11-nerved, second concave, elliptical-lanceolate, nearly as long 

 as the fii'st, keeled above, third and fourth shorter; flower perfect. 



Florida, Curtiss 3630, Drummond 344. 



Florida to Texas. 



Var. Ciliaris (Trin.) E. ciUaris H.B.K. Nov. Gen. et Sp. 

 1 : 193 I. 63 (1815). 



The first glume copiously clothed on the back with short hairs. 



