MYRICACEAE 267 



Tertiary, o: Cretaceous, o: Older Formations, increasing north- 

 ward. Not south of the moraine. 118-153 days. 500-1,300 ft. 



18. S. sericea Marsh. (S. subsericea (Anders.) Schneider.) In 



swamps: Me. to Mich, and Va. 



Throughout the range, except the pine-barrens and east and 

 south of them. 



19. S. viminalis L. Cultivated and occasionally escaped in the 



eastern states. Native of Europe and Asia. 

 Not a very common escape in our range. 



20. S. purpurea L. Sparingly escaped from cultivation in the 



eastern states. Native of Europe. 

 Locally abundant as a roadside plant. 

 The following hybrids have been des:ribed and are to be looked 

 for in our range wherever both the supposed parents are known. 

 Salix nigra X alba. 

 Salix • fragilis X alba. 

 Salix cordata X sericea and others. 

 Salix humilis X discolor. 

 Salix Candida X petiolaris. 

 Salix Candida X cordata. 



Salix glaucophylla Bebb. has been reported as growing in Monroe Co., Pa., but it has 

 not recently been collected. In Conn, the European 5. incana Schrank occurs as a 

 rare escape. 



MYRICACEAE 



Ovary subtended by 2-4 bractlets; leaves serrate or entire e^tipu- 

 late. 1. Myrica. 



Ovary subtended by 8 linear persistent bractlets; leaves pinnatifid, 



stipulate. 2. Comptonia 



i. Myrica L. 



Bractlets of pistillate aments persistent, clasping the drupes; low 



bog shrub. I. M. Gale. 

 Bractlets of pistillate aments deciduous, the ripe drupes separated. 

 Slender tree; leaves mostly acute, narrow; drupes less than 2 



mm. in diameter. 2. M. cerifera. 



Shrub; leaves mostly obtuse. 3-4 mm. in diameter. 3. M. carol inensis. 



i. M. Gale L. In wet places: Newf. to Alask., S. N. Y., Va., 

 Mich, and Wash. 



Conn. Rare or wanting in the littoral, increasing northward. 

 N. Y. L. I., not definitely known between it and Dutchess and 

 Ulster counties, thence increasing northward. 



