SHREVE 



Plate 20 



atTfctoL y. -.-? .-,..- -ifx, 



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A. Flood-plain in Bear Canon at (J.OUU feet, with Pinus arizonica, Populus jamesii, an open carpet of 

 summer-active herbaceous perennials, and Sporobolus confuse*. 



B. Stream way in Bear Canon at 6,000 feet, with Pinus arizonica, Juglans rupestris, and Vitis arizonica. 



