58 



785. Bouteloua breviseta Vascy, n. up. Culms iisceutlinj; from ;i decumbent root- 



ing rhizome, almoat woody below, 15 to rJO'''" high, leafy below : leaves rififid, 

 involute, sjireadiug, pungent, 2.") to 5''" long, smooth or sparsely eiliato- 

 fringed; ligule ciliate : spikes ono to three, distant when more than one, 

 ii.5 to 3.5"" loitg, closely llosverod, very narrow: spikelots 4""" long or less, 

 including the awns: empty glumes unequal, 2 to 2.5""" long, the upper one 

 pungeiitly i)(>inted: llowering glume about :5""" long, iucluding the awurt, 

 oblong, three-uorved, three-lobed near the apex, and with three short awns, 

 more or less pubescent on the back: palet nearly as long, narrower, two- 

 nerved: imperfect llower of three short awns on a short pedicel which is 

 hairy lulled at top.— Screw Bean (Presidio county). Apparently growing 

 in sand. 



786. Bouteloua bromoides Vasey (ii. HumboUiiana Kuuth). Rio Grande City 



(Starr county). 



787. Bouteloua Burkei Scribner. JJallinger (Runnels county). 



788. Bouteloua eiiopoda Torr. Devil's River (Val Verde county). 



789. Bouteloua Havardii Vasey. Chenato Mountains (Presidio county). 



790. Bouteloua hirsuta Lag. 



791. Boiiteloua hirsuta Lag., var. major Vasey. 



792. Bouteloua hirsuta Lag , var. minor Vasey. Pena (Duval county). 



793. Bouteloua oligostachya Torr. Screw IJean (Presidio county). 



794. Bouteloua oligostachya Torr., var. major Vasey, - 



795. Bouteloua polystacliya Torr. Peua (Duval county). 



796. Bouteloua racemosa Lag. Uallingor (Runnels county). 



797. Bouteloua ramosa Scribner. Ciienate Mountains (Presidio county). 



798. Bouteloua stiicta Vasey. 



799. Bouteloua Texana Watson. Point Isabel. 



800. Bouteloua trifida Thnrl)er. Pena (Duval county). 



801. Eleusine ^gyptiaca I'ers. Introduced. 



802. Eleusine IndicaGicrtn. Introduced. 



803. Leptochloa Domingeusis Link. Hidalgo (Hidalgo county), 



804. Leptochloa mucronata Kunth, 



805. Leptochloa Nealleyi \'asoy. 



806. Buchloe dactyloides Engelm. 



807. Pappophoriun apertum Munro. Rio Grande City (Starr county), 



808. Pappophorum laguroideum Schrad. Rio Grande City (Starr county). 



809. Pappophorum Wrightii Watson. Chenato Mountains (Presidio county). 



810. Cottea pappophoroides Kunth. 



811. Cathestechum erectum Vasey A Hackel. 



812. ScleropogonKarwinskianus Benth. Pena (Duval county). 



813. Monauthochloe littoralis Engelm. 



814. Munroa squarrosa Tcnr. 



815. Aruudo Donax L. i'robably introduced, but wild on the Rio Grande. 



816. Phragmites communis Trin. 



817. Triodia acuminata Vasey. Santa Anna (Coleman county) and Chenate 



Mountains (I'residio county). 



818. Triodia albescens Va.soy. 



819. Triodia ambigua Vasey. Point Isabel, 



820. Triodia avenace a IIBK. ? 



821. Triodia cuprea .Jac<i. I'oint Isabel. 



822. Triodia eragroatoides Vasey & Scribner, n. sp. Culms 6 to y**" high, leafy : 



sheaths longer than the internodes, roughish ; ligule short, ciliate-toothed : 

 blade Hat, 2 to IJ''"' long, scabrous, acuminate : panicle largo and spreading, 

 3din long, the branches slender, rather distant, single or in twos, the lower 

 ones 12.'''> to 15"" Jong, lax-tlowered : spikeleta sbort-pediccled, alternate, and 



