VI INDEX. 



Heteropogon contortus 



Hilaria cenchroides 



mutica 



rigida 



Lycurus phleoides 



Melica diffusa 



Porteri 



Muhlenbergia Buckleyana 



depauperata 



distichophylla 



gracilis 



Neo-Mexicana 



Schaffneri 



Munroa squarrosa 



Oryzopsis finibriata 



membranacea 



Panicum bulbosum . . . .- 



ciliatissimum 



lachnanthum 



Paspalum distichum 



lividum 



pubiflorum 



Phalaris intermedia, var. angusta 



Pappophorum apertum 



Wrightii 



Schedonnardus Texanus 



Scleropogon Karwinskianus 



Setaria caudata 



Sporobolus argutus 



Buckleyi 



interruptus 



tricholepis 



Wrightii 



Stenotaplmun Americanum 



Stipa flexuosa 



pennata 



Scribneri 



Thurberia Arkansana 



Trachypogon polymorphus 



Tragus racemosus 



Trichloris pluriflora 



verticillata 



Triodia acuminata 



albescens 



eragrostoides 



grandiflora 



Nealleyi 



pulchella 



stricta 



Texana 



trinerviglumis 



Trisetum Hallii 



interruptum 



Part. 



Plate. 



I 



16 



I 



10 



I 



11 



II 



2 



II 



15 



I 



49 



I 



50 



II 



12 



II 



14 



I 



25 



I 



26 



II 



13 



II 



14 



II 



31 



II 



11 



II 



10 



I 



2 



I 



3 



I 



4 



II 



3 



II 



4 



II 



5 



II 



6 



II 



17 



II 



28 



II 



24 



II 



30 



I 



5 



II 



16 



11 



17 



II 



18 



II 



19 



II 



20 



I 



8 



I 



24 



II 



8 



II 



19 



I 



9 



I 



17 



I 



14 



II 



24 



II 



25 



11 



32 



II 



33 



II 



34 



II 



35 



II 



36 



II 



37 



II 



38 



II 



39 



II 



40 



II 



21 



II 



22 



