GENERAL INDEX OF PLATES. 



.'Egopogon geminiflorus . 

 Andropogon cirrliatus . . . . 



hirtiflorus . , . 



saccharoides . 



Wrightii 



Diplaclme fascicularis . . . . 



imbricata 



Reverclioni .... 



rigida 



vis'cida 



Elioiiurus barbiculmis 



tripsacoides 



Elymus Sitanion 



Epicampes macroura 



rigens 



Eragrostis curtipedicellata . 



lugens 



oxylepis 



Purshii 



Eremochloe Bigelovii 



Kingii 



•Eriocliliia .sericea 



Aristida Arizonica 



divarieata 



purpurea 



Bouteloua arenosa 



aristidoides 



Burkei 



eriojioda 



Havardii 



hirsuta 



Huraboldtiana 



oligostachya 



prostrata 



racemosa 



rainosa 



Bouteloua stricta 



trifida 



Buchloe dactyloides 



Cathestecutn erectiini 



Cenclirus myosuroides 



tribuloides _ 



Chloris alba 



ciliata 



cucuUata 



glauca 



Swartziana I 



vertieillata 



Cottea pappophoroides I 



Plate. 

 12 

 18 

 19 

 20 

 21 

 ''2 



