59 



mostly single, live to nine flowered, 5™" long: empty glumes nearly equal, 

 lanceolate-acuminate, oueiierved: flowering glumes 2 to 2.5""" long, three- 

 nerved, oblong, obtuse, eniargiuate, short-cuspidatt;, the lateral nerves and 

 midrib pubescent belon' : palet one-fourth shorter, obtuse, and denticulate.^ 

 Florida (lilodgett), Texas {Buckleij, JVeallei/, lieverclmi). A beautiful species, 

 having the aspect of an Kratjrostis. 'I'here are several forms of this verging 

 towanl T. atnhif/iia, 



823. Triodia graudiflora Vasey, n. up. Cuhns ;J to 5"^'" liigh: leaves narrow, rigid, 



idaueor condiiplicate, .j to lU"" long, lower with thesheaths softly pubescent : 

 panicle oblong, dense, '.iJ) to tl''" long, branches appressed: spikelots 8 to 10'""' 

 long: empty glunicsuuequal, lanceolate, the upper H""" long, one-nerved, the 

 lower rather shorter, three-nerved: flowering glumes 7 tori""" long, acute, apex 

 two-lobed, lobes acute, the fissure less than 2""" long, awn about 2""" long, the 

 lateral nerves densely ciliate the entire length, and the midrib below : palet 

 narrow, a third as long as its glume, pubescent on the nerves, abruptly acute. 

 -ChenateMountains (Presidio county) ; collected also in Arizona and Chi- 

 huahua by Pringle. Tliis has been distributed !is T. avenacea HBK., but 

 it does not agree with the description and figure given. The spikolets and 

 flowers are larger than in any other Triodia. 



824. Triodia mutica Vasey. (T. trinervif/lumis Miin.) Ballingcr (Eumiela county). 



825. Triodia Nealleyi Vasey. Ciienate Mountains (Presidio county). 



826. Triodia pulchella Vasey. Chenatc Mountains (Presidio county). 



827. Triodia purpurea A'asey. 



828. Triodia stricta Vasey. 



829. Triodia Texana Vasey. Point Isabel. 



830. Diplachne dubia ISenth. 



831. Diplachne fascicularis P. lir. 



832. Diplachne imbricata Tliurber. Point Isabel. 



833. Diplachne Reverchoni Vasey. 



834. Diplachne rigida Vasey. 



835. Eragrostis carapestris Trin {fJ. nitida Chapman). 



836. Eragrostis capillaris Vasey. Pena (Duval county). 



837. Eragrostis conferta Trin. 



838. Eragrostis curtipedicellata IJuckl. Hidalgo (Hidalgo county). 



839. Eragrostis lugens N(^es. 



840. Eragrostis major Host. 



841. Eragrostis Neo-Mexicana Va.scy. 



842. Eragrostis oxylepis Torr. Point Isabel. 



843. Eragrostis pectinacea (iray. 



844. Eragrostis Purshii Schnid. Pena (Duva! county). 



845. Eragrostis Purshii Schrad., var. diffusa Vasey {E. diffusa Hu(;kl.). 



846. Eragrostis reptans Nees. Point Isabel. 



847. Eragrostis teiiuis (Jlray. 



848. Eragrostis tenuis Gray, var. Texensis Vasey, n. rmr. Culm rigid, erect, 75 to 



yO'"' high, leafy, simple : sheaths striali!, smoothish or silky-liairy above and 

 at the throat ; blade rather rigid, nearly as long as the culm, scabrous and 

 with .a few scattered hairs on the upper surface, smooth below, upper sheath, 

 inclosing the base of the pauicle, which is half tlie length of the plant, the 

 branches erect-spreading: spikelels three to five-flowered, acute: empty 

 glumes lanceolate, acute, longer than the lowest flowering glume. — Collected 

 by both Keverchon and Noalley. 



849. Eatouia obtusata Gray. 



850. Eatonia Pennsylvauica Gray. 



851. Koeleria cristata Pers. 



