96 Tips of lobes of leaves rounded..WHITE OAK group (QUERCUS) 



96 Tips of lobes of leaves pointed 



RED and BLACK OAKS (QUERCUS) 



97 Leaves usually double-toothed ; winter-buds often hairy or 



sticky, woolly inside MOUNTAIN-ASH (SORBUS) 



97 Leaves sometimes single-toothed; winter-buds sometimes 



hairy, but not sticky or woolly 98 



98 Stipule-scars present ; leaf-margins sometimes wavy 99 



98 Stipule-scars absent ; margins always double-toothed 100 



99 Tip of leaf 3-lobed ; teeth of margin not long-pointed 



FLOWERING ALMOND (PRUNUS) 



^ Tip of leaf not 3-lobed ; teeth of margin long-pointed 



CHERRY (PRUNUS) 



1(X) Second-year twigs purple-brown ; leaves 2-6 cm. long, wavy- 

 margined, single-toothed, varying from unlobed to deeply 

 lobed or compound ; both twigs and leaves eventually hair- 

 less PEAR ( P YRUS) 



100 Both twigs and leaves not as just described 



CRABAPPLE (MALUS or PYRUS) 



SIMPLE SPIRAL TOOTHED LEAVES 



101 Leaves palmately veined 102 



101 Leaves pinnately veined 105 



102 Leaves with 5-7 almost equal veins at base of blade 



(TETRACENTRON) 



102 Leaves with 3 almost equal veins at base of blade 103 



103 Leaves 10-15 cm. long, petioles 3-5 cm. long 



JAPANESE RAISIN-TREE. HONEY-TREE (HOVENIA) 



103 Leaves usually not more than 10 cm. long; petioles less than 



3 cm. long 104 



104 Leaves irregularly toothed, 3.5-8 cm. long ; bark of trunk gray, 



peeling in long flakes (PTEROCELTIS) 



104 Leaves usually untoothed near base ; bark smooth or with corky 



warts HACKBERRY. SUGAR-BERRY (CELTIS) 



18 



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