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TREES OF MINNESOTA. 



Plate 54. Rhamnus catharticus. Buckthorn. 



1. Flowering branch from staminate plant, one-half natural size. 2. Flowering- 

 branch from pistillate plant, one-half natural size. 3. Staminate flower, enlarged 

 4. Longitudinal section of staminate flower, enlarged. 5. Pistillate flower, en- 

 larged, (i. Longitudinal section of pistillate flower, enlarged. 7. Cross section 

 of ovary. 8. Single fruit, one-half natural size. 9. Single fruit with a part re- 

 moved to show nutlets. 10. Cross section of seed. 11. Embryo. 12. View 

 of grounds showing the use of Buckthorn for a hedge. 



