Frocccdii!i!:s of the Ohio State Academy of Science 111 



B. Fruit a legume or loment, upper petal inclosing the lat- 

 eral ones in the bud; leaves compound (sometimes 

 with I leaflet) with stipules. Papilionatae. 

 a. AVithout stipular spines ; leaflets large, 3-6 in. 

 long; base of petiole covering the axillary 

 buds like a cap. Cladrastis. (47). 

 a. With stipular spines; leaflets small, 1-2 in. long; 

 base of petiole not covering the axillary buds 

 like a cap, but solid. Robinia. (48). 



24. Carpels more than i as shown by the compound ovulary, 



cavities, placentae, styles, or stigmas. 25. 



25. Ovulary 2-locular to plurilocular. 26. 



2^. Ovulary i-locular, ovules solitary, stigmas 3; shrubs or trees 

 with resinous or milky sap and alternate leaves without 

 stipules. Anacardiaceae. 

 a. Leaves compound, styles terminal. Rhus. (52). 

 a. Leaves simple, styles lateral. Cotinus. (53). 



26. Flowers regular or nearly so. 27. 



26. Flowers irregular ; shrubs or trees with opposite digitate 



leaves ; ovulary 3-locular. Hippocastanaceae. 



,a. Aesculus. (58). 



27. Stamens neither just as many nor twice as many as the 



petals. 28. 



27. Stamens just as many or twice as many as the petals. 29. 



28. Stamens distinct and fewer than the 4 petals ; trees or shrubs 



with opposite pinnate or simple leaves. Oleaceae. 

 a. Flowers dioecious, from catkin-like scaly buds. 



Adelia. ( 70) . 

 a. Flowers bisporangiate, petals linear. Chionanthus. 



(71)- 



28. Stamens more numerous than the petals ; leaves palmately 



veined, opposite ; fruit 2-winged. Some Aceraceae. 



a. Acer. (57). 



29. Ovules I or 2 in each cavity. 30. 



