88 



PANIC AC E^. 



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

 species. 



West Texas, U>/^/// S04; New Mexico, Wr if/ht 210Q: Arizona, 

 Leinmou lim'y, Mexico. Pr ingle 423; Texas, Nealley, Havard; 

 Arizona, Lane, liolhrock 038. 



Texas, Arizona, and northern Mexico. 



2. E. tripsacoides II.li.K. Nov. Gen. et Spec. 1 : 192 (1815). 

 Anilropofjon XuttaUii Chapm. FI. S. States, 580 (1860). Elionurfis 

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



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

 the upper 1-3 nodes, interuodes 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 

 sjiikelets 4-7 mm. long borne on 

 a hairy pedicel 3 mm. long, first 

 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-nervcd, third glume a little shorter, 2-uerved, fourth still shorter. 

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

 densely barbate, llattened, 5-0 mm. long, smooth or scabrid, the 2 

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

 bifid, 1 l-nerved, second concave, elliptical-lanceolate, nearly as long 

 as the first, keeled above, third and fourth shorter; flower perfect. 

 Florida, Cxrfiss 3030, Drummond 344. 

 Florida to Texas. 



Var. Ciliaris (Trin.) E. ciliaris II.B.K. Nov. Gen. et Sp. 

 1 : 1J)3 /. 03 (1815). 



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



Pig. 13. — EHomirus tripsacoides 

 Spikelets. (Hichardson.) 



