HACKBERRY. 307 
Plate 40. Celtis oecidentalis. Hackberry. 
1. Flowering branch, one-half natural size. 2. Fruiting branch, one- 
half natural size. 3. Winter twig, one-half natural size. 4. Staminate flower 
before straightening of filaments, enlarged. 5. Staminate flower, expanded, 
enlarged. 6. Perfect flower, enlarged. 7. longitudinal section of perfect 
flower, enlarged. 8. Longitudinal section of fruit, natural size. 9.  Trans- 
verse section of fruit, natural size. 10. Diagram of flower. 
