71 



• 



than or subequal to the scales in length at anthesis, while those of 

 the latter remarkably protruded beyond the scales ; the color of the 

 withered anthers turns to grayish yellow and not to a blackish color; 

 and the cases of subopposite leaves are scarcely met with. 



Sapporo Agricultural College, 

 Sapporo, Japan. July 31st, 1896. 



EXPLANATIONS OF THE PLATE VI. 



Figs. 1, 2, 3, 4, 5 and 17 are of natural size ; the rest more or 

 less magnified. 



Fig. 1. — Matured leaves, stipules, and buds on a part of a branch. 



Fig. 2 and 3. — Male catkins on twigs. 



Fig. 4. — Female catkins on a twig. 



Fig. 5. — A detached female catkin. 



Fig. 6. — Part of a female catkin. 



Fig. 7. — Part of a female catkin with much developed scales. 



Fig. 8 and 9.— Male flowers. 



Fig. 10.— Anthers (front view). 



Fig. 11. — Single anther (lateral view). 



Fig. 12.— Gland of a male flower. 



Fig. 13. — Female flowers (lateral view). 



Fig. 14. — Capsule (front view). 



Fig. 15. — Gland of a female flower. 



Fig. 16.— Scale of a female flower. 



Fig. 17. — A branch with matured capsules. 



Fig. 18.— Seeds (inverted)- 



