Southeastern Washington and Adjacent Idaho. 12 
Fic. 34. Heracleum lanatum and Crataegus brevispina in a wet meadow. 
Fic. 35. A view of the flood-plain trees along Rock Creek in western 
Whitman County. The chief trees are Betula microphylla, Crataegus brevi- 
spina, and species of Salix. 
1 
