CLEMENTS 



PLATE 32 



A. Postclimaxes of scrub {Shepherdia, Amelanchier, etc.) and of woodland ( Ulmus, Frax- 

 imis, Quercus macrocarpa) in prairie climax, Gasman CouMe, Minot, North. Dakota. 



B. Sagebrush preclimax {Artemisia tridenlata) and Pinm ponderosa chmax, Estes 



Park, Colorado. 



