KEY TO IMPORTANT WOODY PLANTS 



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17. Ripe fruits red, hairless to hairy; thorns stout to slender, to 

 2V 2 inches long, usually sharp; twigs brown, aging light gray; 

 leaf margins, leafstalks and sepals usually with gland-tipped 

 teeth; occasional, near streams, e. Oreg., e. Wash. 

 18. Fruits scarlet (or dark red to purplish), hairless; thorns 

 often stout, straight; leaves reversely egg-shaped, often ap- 

 pressed-hairy; margins 5- to 9-lobed above middle, saw- 

 toothed; flower- and fruit-clusters nearly hairless; much- 

 branched shrubs or small trees 6-15 feet high; type locality, 

 along Columbia River and its tributaries e. of Cascades. 



Columbia hawthorn (Crataegus columbiana) . 

 18. Fruit coral red, hairy; thorns slender, straight or somewhat 

 reflexed; leaves broadly oval, shortly tapered at tip, ap- 

 pressed-hairv on both sides; margins doubly saw-toothed 

 above (singly so below) middle; shrubs to 10 feet high; type 

 localitv, springy, gravelly hillsides, Pullman, Wash. 



Piper hawthorn (Crataegus piperi). 



Piper hawthorn 



y - 10402-1 



Columbia hawthorn 



