110 Proceedings of the Ohio State Academy of Science 



c. Cavities of the ovulary becoming- twice as many as 



tlie styles. Amelanchier. (40). 



d. Cavities of the ovulary with 1-3 seeds, e. 



d. Cavities of the ovularv with manv seeds. Cydonia. 



(39). 



e. Flesh of the pome with grit-cells. Pyrus. (37). 



e. Flesh of the pome without grit-cells. Malus. (38). 

 21. Ovulary only i. carpels i to many, united. 24. 



21. Carpels 2 or more, distinct, or somewhat united at the 



base. 22. 



22. Leaves compound. 23. 



22. Shrubs or trees with alternate simple leaves. Hamamelid- 



ACEAE. 



a. Ovules i in each cavity, fruit a woody capsule. 



Hamamelis. (29). 

 a. Ovules several in each cavity, fruit globular, spiny. 



Liquidambar. ( 30) . 



23. Leaves punctate with pellucid dots, alternate. Rutaceae. 

 a. Carpels 2-5, distinct. Xanthoxylum. (49). 



a. Ovulary i, 2-locular. Ptelea. (50). 



23. Leaves large, pinnate, alternate, not punctate but with disc- 



like glands under the teeth or lobes. Simarubaceae. 



a. Ailanthus. (51). 



24. Carpel i, ovulary with i parietal placenta; leaves alternate, 



usually with stipules, usually compound. Fabaceae. 

 A. Fruit a legume ; upper petal inclosed by the lateral ones 

 in the bud ; leaves simple or compound mostly with 

 stipules. Cassiatae. 

 a. Leaves simple, flowers bisporangiate. Cercis. 



(44). 



a. I^eaves compound, flowers dioecious or imperfectly 



dioecious, b. 



b. Stamens 3-5; pod flat. Gleditsia. (45). 



b. Stamens 10 ; pod thick, woodv. Gymnocladus. 

 (46). 



