Black Cherry 



a. Winter twig, x 



b. Leaf, x 2/^. 



c. Margin of leaf, enlarged. 



d. Flowering branchlet, x i/^. 



e. Vertical section of flower, enlarged. 



f. Fruiting branchlet, x i/^. 



Common Chokegherry 



a. Winter twig, x 1. 



b. Leaf, x 34. 



c. Flowering branchlet, x i/^. 



d. Fruiting branchlet, x I/2. 



14 ^ 



[260] 



