Proceedings of the Ohio State Academy of Science 81 



7. Foliage leaves small, scale-like, appressed, opposite, 4- 

 ranked, closely covering the slightly flattened twigs 

 which are not very fan-like ; leaves nearly or quite 

 similar ; scales of the carpellate cone peltate. 



Chamaecyparis. (9). 



7. Foliage leaves of two types, scale-like and subulate, 

 opposite or in threes ; the scale-like leaves 4-ranked, 

 appressed, causing the twigs to appear cjuadrangular, 

 the subulate leaves spreading; one or both types of 

 leaves on a plant ; carpellate cone developing into a 

 bluish-black berry-like fruit. Juniperus. (10). 



8. Leaves alternate. 9. 



8. Leaves opposite or whorled. 74. 



9. Leaves simple. 10. 



9. Leaves compound. 62. 

 10. Leaves pinnately veined or with a simple midrib. 11. 



10. Leaves palmately veined or at least with 2 or more 



prominent side ribs coming from near the base of the 

 blade. 53. 



11. Leaves truncate or broadly emarginate ; with complete 



stipular rings at the nodes. Lirodendron. (33). 

 II. Leaves entire. 12. 



11. Leaves serrate, dentate, crenate, pinnatifid, or variously 



lobed. 25. 



12. With stipular rings at each leaf node ; leaves large. 



Magnolia. (32). 



12. Not with stipular rings. 13. 



13. With thorns and milky sap. 14. 



13. Without thorns; sap not milky. 15. 



14. With thorns beside the axillary buds ; leaves not taper- 



ing at the base, acute or even heart-shaped. 



Toxylon. (27). 



14. With terminal thorns and some axillary thorns ; leaves 

 tapering to the base ; narrow or slender-cuneate. 



Bumelia, (65). 



