368 



FOREST TEEES OF THE PACIFIC SLOPE. 



Climatic Conditions.— Similar to those of gray pine. 



Tolerance.— Endures a good deal of shade in early life and light shade when older: 

 tolerance appears greater with increased soil moisture. 



Fig. 172. — Cercis occiilcnialis: a, seed. 



reproduction.— Plentiful seeder. Seed of high rate of germination (60 to 70 per cent), 

 hut tardy; vitality persistent. Young plants frequent in crevices, pockets, and little 

 benches where seed has been well covered with mineral soil. 



