86 Proceedinc^s of the Ohio State Academy of Science 



46. With stipules or stipular scars. 47. 



46. Without stipules or stipular scars ; leaves sour, with 



prominent scattered hairs on the midrib beneath ; trees; 

 fruit a ca])sule. Oxydendrum. (64). 



47. With typical lateral thorns ; fruit a drupe-like pome with 



bony ripe carpels. Crataegus. (41). 



47. Not with typical lateral thorns, but some may have thorn- 



like stunted branches. 48. 



48. Leaves with i or more disc-like, wart-like, or tooth-like 



glands on the petiole or at the base of the blade. 49. 



48. Leaves not with distinct glands on the top of the petiole 



nor at the base of the blade, but they may be glandular- 

 hairy. 50. 



49. Twigs green, red, or red and green ; nectar glands disc- 



like, usually 2-4 near the base at the edge of the blade; 

 terminal bud present ; fruit a velvety drupe. 



Amygdalus. {43). 



49. Glands various; twigs not red and green, some with 



cleavage planes in basal joints: terminal bud present 

 or absent, fruit a smooth drupe. Prunus. (42). 



50. Axillary buds usually superposed ; leaves lanceolate or 



oblong-lanceolate, tapering towards the short petiole ; 

 fruit a berry-like drupe. Ilex. (54). 



50. Axillary buds not superposed. 51. 



51, Leaves with gland-tipped serrations; terminal bud absent 



on ripe twigs or if present then the lateral veins promi- 

 nent .and nearly parallel and curving upward at the 

 margin of the leaf ; fruit a berry-like drupe. 



Rhamnus. (60). 



51. Leaves not with gland-tipped serrations, or if so then 



not as above ; terminal buu present : fruit a pome. 52. 



52. Leaves sharply and regularly serrate, glabrous when 



mature, petioles long; pome with grit cells. 



Pyrus. (37). 

 52. Leaves irregularly dentate or serrate, or more or less 

 lobed ; pome without grit cells. Malus. (38). 



