22 WOODY PLANTS 



96. Buds superposed; stem not prickly. . . Aristolochia , p, 91 



96. Buds solitary; stem prickly. . . Rosa, p. 117 



97. Some twigs spinescent. . . Lycium , p. 183 



97. Entirely unarmed. 98 



98. Bearing a knob at each angle of the leaf-scar. . . Wisteria, p. 130 



98. Not as above. 99 



99, Buds small or sunken. 100 



99. Buds medium-sized. 102 



100. Stem hairy; stone of fruit crescent-shaped. . . Cocculus, p. 94 



100. Stem essentially glabrous. 101 



101. Stone of fruit crescent-shaped. . . Menispermum , p. 94 



101. Stone cup-shaped. . . Calycocarpum, p. 94 



102. Leaf-scars low, bud-scales glabrous. . . Celastrus, p. 139 



102. Leaf-scars raised, bud-scales pubescent. . . Solanum , p. 183 



103. Bearing spines or prickles. 104 



103. Without spines or prickles. 116 



104. Bearing spines (stiff outgrowths of the twig). 105 



104. Bearing prickles (superficial outgrowths). Ill 



105. Spines representing leaves or stipules. 106 



105. Spines borne singly at the side of the buds. . , Lycium, p. 183 



105, Spines representing modified twigs. 107 



106. Spines representing modified leaves. . . Berberis , p. 93 

 106. Spines representing stipules. . . Robinia, p. 130 



107. Sap milky. . . Madura , p. 89 

 107. Sap not milky. 108 



108. Leaf-scars on torn membranes; spines branched. . . Gleditsia , p. 127 



108. Not as above, 109 



109. Spines very sharp-pointed. . . Crataegus, p. 112 



109, Spines representing less modified twigs. 110 



110. Stipule-scars none. . . Pyrus , p. 108 



110. Stipule-scars present. . . Prunus , p. 121 



111. Leaf-bases persistent, torn at top. , , Rubus, p. 115 



111, Leaf-bases not persistent. 112 



112. Leaf-scars irregularly cracked. . , Robinia, p. 130 

 112. Not as above. 113 



