FOREST TREES OF THE PACIFIC SLOPE. 



215 



willows ; rather uncommon In Pacific region. Climatic conditions marked by moderate 

 temperature, which probably accounts for its rarity in this region. Decidedly intolerant 



Fig. 86. — Sali-x nigra: a, male flowers. 



throughout life. Abundant seeder (over greater part of range) ; reproduction best on 

 wet humus or sand. 



