KEY, BASED UPON FRUIT. IT 



C 6 Pod (legume) which is 

 d. Oblong, flat, about 2 in. broad and curved. 



27. GYMNOCLADUS CANADENSIS. 

 d*. Linear or nearly so 



10-18 in. long, contorted and twisted.. .28. GLEDITSCHIA TRIACANTHOS. 

 4-6 in. long, subterete, compressed between the seeds and thick- valved. 



129. PROSOPSIS JULIFLORA 



3-4 in. long, 2 8-seeded and thin valved. .128. CERCIDIUM TORREYANUM. 

 d 3 . Obliquely ovate (1-2 in. long), long stalked and mostly 1-seeded. 



109. GLEDITSCHIA MONOSPERMA. 

 C 7 . Pome; capsules 



d. 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. AMELANCHIER CANADENSIS. 



f*. Flattened-globose, waxy, fragrant and very tart. 



83. PYRUS CORONARIA. 



e 2 . 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 OOCCINEA. 



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

 C 8 . Berry, 



d. With persistent thickish calyx-lobes large (about 1 in. or more). 



61. DlOSPYROS VlRGINIANA. 



d~. Without persistent calyx lobes and smaller 



e. In thyrses 78. VITIS ^ESTIVALIS. 



e 2 . In compact-racemes and 



Hoary-tomentose 131. GARRYA ELLIPTICA. 



Smooth and flattened globose 133. ARCHSTAPHYLOS PUNGENS. 



e 3 . In open panicles 132. ARBUTUS MENZIESII. 



c 9 . Fleshy with custard-like edible pulp 76. ASIMINA TRILOBA. 



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



84. PYRUS SAMBUCIFOLIA. 

 C n . 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 . Achenium. 



3-4-angled and with membranous wing like margins. 



108. CLIFTONIA LIGUSTRINA. 

 Linear-oblong, tipped wiih the prolonged tail-like style. 



130. CERCOCARPUS PARVIFOLIUS. 

 . 1 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. 2EscuLUS HIPPOCASTANUM. 



Smooth and leaflets 5 127. ^SCULUS CALIFORNIA. 



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