CLEMENTS 



; ts&f^B 



mvf'jtfx 



Srk 



*&* 





A. Tobosa "swag," Hilaria and Scleropogon subclimax to desert plains grassland, Las 



Cruces, N< \v Mexico. 



B. Playa in the Bulhilis subclimax stage, the old shore-line marked by Euphorbia, Texhoma, 



Oklahoma 



