154 Proceedings of the Ohio State Academy of Science 



2. Leaves obovate, spatulate, oblanceolate, or flabellate. 3. 



2. Leaves ovate, oval, orbicular-obovate, or nearly orbicular. 5. 



3. Leaves, calyx, and peduncles glabrous; oblanceolate or obovate, 



sharply serrate. 4. 

 8. Lower surface of leaves, calyx, and peduncles more or less pubes- 

 cent, at least when young; leaves slender-petioled, obovate, dull, 

 irregularly serrate; fruit large, red or yellow, globose or oval. 

 C. punctata. 



4. Thorns long, slender; leaves shining; fruit globose or slightly 



pear-shaped, dark red. C. cms-galli. 



4. Thorns short, stout, leaves dull; fruit globose, purple-black. C. 



brevispina. 



5. Leaves, calyx, and peduncles glabrous or nearly so. 6. 



5. Lower surface of leaves or their teeth, calyx, and peduncles pubes- 



cent or glandular. 9. 



6. Leaves mainly truncate or cordate at the base. 7. 



6. Leaves narrowed or wedge-shaped at the base. 8. 



7. Leaves lobed ; fruit depressed-globose, -4- in. or less high, bright 



red. C. cordata. 



7. Leaves irregularly serrate; fruit glaucous, sub-globose, \ in. high. 



C. eggerti. 



8. Leaves deeply cleft; fruit globose or globose-ovoid, small, coral- 



red. C. oxyacantha. 



8. Leaves serrate or somewhate lobed; fruit globose or oval, persistent 



into the winter. C. viridis. 



9. Leaves glabrous or nearly so. 10. 



9. Leaves pubescent, especially along the veins beneath. 12. 

 10. Leaves or most of them truncate or cordate at the base, sharply 

 incised and serrate; fruit globose or oval, red. C. coccinea. 



10. Leaves or most of them narrowed at the base. 11. 



11 . Fruit about ^ in. in diameter, globose to oval, red ; bractlets and 



calyx very glandular. C. rotundifolia. 



11. Fruit about J in. in diameter, globose or oval; bractlets and calyx 



glandular. C. macrantha. 



12. Leaves mostly truncate or cordate at the base, ovate-orbicular; fruit 



bright red, hairy. C. mollis. 

 12. Leaves mostly cuneate or narrowed at the base, ovate or oval, 

 sharply dentate or somewhat lobed ; fruit oval or oblong, large, 

 crimson or orange-red, eatable. C. tomentosa. 



I. Crataegus crus-galli L. Cockspur Hawthorn. A 

 small tree with spreading branches and numerous slender thorns. 

 Leaves coriaceous, shining above, sharply serrate. Fruit remain- 



