INDEX OF PLATES 



Plate. 



Aristida purpurea 7 



Chloris Swartziaria 28 



Cottea pappophoroidea 29 



1 )i|)lachue fascicularis 41 



imbricata 42 



Reverchoni 43 



rigida 44 



viscida 45 



Elionurus tripsacoidee 1 



Elynuis Sitanion 50 



Eragrostis curtipedicellata 46 



lugens 47 



oxylepis 48 



Purshii 49 



Hilaria rigida 2 



Lycurus phleoides . 15 



Muhlenbergia Buckleyana : 12 



depauperata 14 



Neo Mexicana 18 



Schaffneri 14 



Munroa squarrosa 81 



Oryzopsis fimbriata 11 



membranacea 10 



Paspalum distii-luim 3 



li viduin 4 



pubiflorum 5 



Plialaris intermedia var. augusta 6 



Pappnphonim apertum 17 



Wrightii 28 



Schedonnardus Texanus 24 



Soleropogon Kar\vinskianus 30 



Sponibi >lns argutus 16 



Hurkleyi 17 



interruptus 18 



tricholepis 19 



Wrightii 20 



Stipa peunata 8 



Sc-ribneri 19 



Trichloris pluriflora 24 



verticillata 25 



Trie nlia acuminata 32 



albescens , 33 



eragrostoides 34 



grandiflora 35 



Nealleyi : 36 



pulchella 37 



stricta 38 



Texana 39 



trinerviglumis 40 



Trisetum Hallii 91 



interruptum 22 



7 



