8 A Study of the Vegetation of 
and wilting coefficient, that they are considered in connection 
with the plant communities which they support. 
TOPOGRAPHY AND DRAINAGE 
Viewed from the top of a bordering mountain, or, better, from 
the summit of an isolated butte, the surrounding plateau looks 
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Fic.1, Map of southeastern Washington and adjacent Idaho. The shaded 
areas indicate coniferous woodland. Most of the outlying timbered areas are 
characterized by yellow pine. West of the dotted line and in the canyon 
of Snake River much of the area is characterized by scab-land covered 
with sagebrush or bunch-grass. 
8 
