INDEX OF PLATES. 



Aristida purpurea 7 



Chloris Swartziana ■ 23 



Cottea pappophoroides 29 



Diplachne fascicularis 41 



imbricata 42 



Reverchoni 43 



rigida 44 



viscida 45 



Elionurus tripsacoides 1 



Elymus Sitanion 50 



Eragrostis curtipedicellata 46 



lugens 47 



oxylepis 48 



Purshii 49 



Hilaria rigida 2 



Lycurus phleoides 15 



Muhlenbergia Buckleyana 12 



depauperata 14 



Neo Mexicana 13 



Schaffneri 14 



Munroa squarrosa 31 



Oryzopsis flmbriata 11 



membranacea 10 



Paspalum distichum 3 



lividum , 4 



pubiflorum 5 



Phalaris intermedia var. angusta 6 



Pappophorum apertum 17 



Wrightii ,....' 28 



Schedonnardus Texanus 24 



Scleropogon Karwinskianus 30 



S| x )i( >l »olu3 argutus 16 



Buckleyi 17 



interruptus • 18 



tricholepis 19 



Wrightii 20 



Stipa pennata „ .... 8 



Scribneri 19 



Trichloris pluriflora 24 



verticillata 25 



Triodia acuminata 32 



albescens 33 



eragrostoides 34 



grandiflora 35 



Nealleyi 36 



pulchella 37 



stricta 38 



Texana 39 



trinerviglumis 40 



Trisetuni Hallii 21 



interruptum 22 



