Frocccdii!i:;s of flic Ohio State Acadcnix of Science 111 



B. J-"ruit a legume or luincnt. upper ];etal inclosing the lat- 

 eral ones in the hud; leaves oompoimd (sometimes 

 with 1 leaflet) with stipules. Paphjonatae. 

 a. A\'ithout stijjular s])ines ; leaflets large, 3-6 in. 

 long; base of petiole covering the axillary 

 buds like a ca]). Cladrastis. (47). 

 a. ^^'ith stipul.ar spines; leaflets small, 1-2 in. long; 

 b.ase of petiole not covering the axillarv louds 

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



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



cavities, placentae, styles, or stigmas. 25.' 



25. Ovulary 2-locular to plurilocular. 26. 



-25. Ovularv i-locular, ovules solitary, stigmas 3; shrubs or trees 

 with resinous or milk}- sap and alternate leaves without 



stipules. AXACARDIACEAE. 



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

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



26. Flowers regular or nearly so. zy. 



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. 2S. 

 2^. 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 op])osite jnnnate or simple leaves. Oleaceae. 

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



Adelia. (70). 

 a. Flowers bisporangiate, petals linear. Chionanthus. 

 (71). 



28. Stamens more numerous than the petals ; leaves palmately 



veined, ()p])osite ; fruit 2-winged. Some Aceraceae. 



a. Acer. (57). 



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



