TRRES xix 



94. Without end-bud. p. 67. Prunus. 

 With a terminal bud. 95. 



95. Buds not elongated. p. 56. Pyrus. 

 Buds distinctly elongated. 96. 



96. Buds woolly, rather large. p. 57 Sorbus. 

 Buds not woolly, usually small. p. 60. Amelanchier. 



97. Leaves pinnately lobed. 98. 



Leaves palmately lobed. p. 52. Liquidambar. 



98. Fruit berry-like. p. 57. Sorbus. 

 Fruit with a bony core. p. 60. Crataegus. 



Compound. 



99. Leaves 1 only once pinnate. 100. 

 Leaves often or always bipinnate. 114. 



100. Leaflets 3, close together. 101. 

 Leaflets several, distinctly pinnate. 102. 



101. Leaflets pellucid-dotted. p. 78. Ptelea. 

 Leaflets not pellucid-dotted. p. 72. Laburnum. 



102. Twigs stout: pith large, continuous, finally colored. 103. 

 Twigs moderate, or pith becoming chambered 



or angled or pale. 105. 



103. Leaves with glands on lower teeth. p. 80. Ailanthus. 

 Leaves without nectar-glands. 104. 



104. End-bud present: leaflets large. p. 80. Cedrela. 

 End-bud absent: leaflets small. p. 69. Gleditsia. 



105. Pith finally chambered, with thin brown plates. 106. 

 Pith not chambered. 107. 



106. Buds solitary in the axils. p. 22. Pterocarya. 

 Buds several, superposed in the axils. p. 21. Juglans. 



107. Buds concealed by a membrane. p. 74. Robinia. 

 Buds exposed when the leaves fall. 108. 



108. Leaf-scar nearly encircling the bud. 109. 

 Leaf-scar not encircling the bud. 110. 



109. Leaflets small (2X4 cm.). p. 71. Sophora. 

 Leaflets large (often 5 X 10 cm.). p. 71. Cladrastis. 



110. Leaf-scars large, shield-shaped: buds often superposed. 111. 

 Leaf-scars small or narrow, or buds solitary. 112. 



111. End-bud present: buds ovoid or elongated. p. 23. Carya. 

 End-bud deciduous: buds half-round. p. 96. Sapindus. 



