FOREST TREES OF THE PACIFIC SLOPE. 



257 



From 20 to 30 feet high, with a broad crown, and a short, very deep brown 

 to blackish brown, furrowed trunk, from V2 to 18 inches in diameter. Season's 

 twigs, large, clear red-brown, and dotted with minute light specks. Mature 



Fig. 112. — Betula kenaica: ". fruiting twig; b, seed, natural size and enlarged; c, cone 



scale, enlarged. 



leaves (fig. 112). smooth throughout, dull deep green on their top sides and 

 lighter beneath; both surfaces prominently marked by a net-work of veins 

 which, with the very delicate leaf stems, are yellow. Mature cones (fig. 112) 



