KEY, BASED UPON FEUIT. 17 



C 1 . Pome; capsules 



(I. Cartilaginous; fruit 

 e. Sunken at insertion of pedicel, 

 /. Globular 



Large, 1 in. or more, distinctly 5-celled. . . . .30. PYRUS MALUS. 



Small, more or less 10-celled 59. AMELANCHEER CANADENSIS. 



/'. Flattened, globose, waxy, fragrant and very tart. 



83. PYRUS COROXARIA. 



c-. Not sunken at insertion of pedicel, pyriforin 57. PYRUS COMMUNIS. 



d*. Not cartilaginous, 1-5 bony seeds. 



in. in diameter, red or yellow with white spots. 



58. CRATAEGUS PUNCTATA. 



in. in diameter, leaves round-ovate 86. CRATAEGUS COCCIXEA. 



in. in diameter, leaves wedge-obovate . . .85. CRATAEGUS CRUS-GALLI. 

 C 8 . Berry. 



With persistent thickish calyx, large (about 1 in. or more). 



61. DlOSPYROS VlRGINIANA. 



Without persistent calyx, small, in thyrses 78. VITIS ^ESTIVALIS. 



e 9 . Fleshy with custard-like edible pulp 76. ASIMIXA TRILOBA. 



c 10 . Berry-like pome, f in. in diameter and borne in dense clusters. 



84. PYRUS SAMBUCIFOLIA. 

 c 11 . Hesperidum seeds in juicy pulp and rind leathery. 



Subglobose, flattened at the ends 103. CITRUS AURANTIUM. 



Globose-oblong, mammillate at the extremity . . . .104. CITRUS LIMONUM. 

 C 12 . Acheniuni, 3-4-angled and with membranous wing like margins. 



108. CLIFTOXIA LIGUSTRINA. 

 .* Dehiscent pericarp. 

 C. Subglobose, and 

 d. Coriaceous or woody, dehiscent by 



e. 2-3 valves and containing one or very few large seeds with smooth shin- 

 ing coat and a large scar (^Esculus), fruit prickly and leaflets 7. 



6. JSSCULUS HlPPOCASTANUM. 



e 2 . 4 more or less distinct valves (Garya). 

 f. Epicarp thick and separating quite freely to the base; nut ridged with 



thick shell, globular ovoid and 

 g. Flattened. 



1 in. or less in length , 36. CARYA ALBA. 



1 in. or more in length 64. CARYA SULCATA. 



gr. 2 Not so much flattened, usually 4 angled. 



90. CARYA TOMENTOSA. 



/ 2 . Epicarp only moderately thick and nut of medium size, moderately 

 ridged and with shell of medium thickness. 



65. CARYA PORCINA. 

 f 3 . Epicarp thin, nuts small and thin-shelled; kernel 



g. Astringent and bitter; sutures of epicarp very prominent; nut. 

 Quite smooth, whitish and only slighly compressed. 



37. CARYA AMARA. 

 Rough, reddish, strongly compressed and angled. 



115. CARYA AQUATICA. 



y-. Slightly if at all bitter, nut whitish and sutures moderately promi- 

 nent 91. CARYA MICROCARPA. 



3 



