SHRUBS. 23 



Deciduous Shrubs Unarmed. 



61. Leaves alternate or in alternate clusters. 62. 

 Leaves opposite or, if separated, in 4 ranks. 174. 

 Leaves whorled. 234. 



Leaves alternate. 



62. Leaves simple or appearing so. 63. 

 Leaves distinctly compound. 149. 



Simple. 



63. Leaves extremely small or very narrow. 64. 

 Leaves relatively large or broad. 65. 



64. Leaves almost scale-like, overlapping. Tamarix. 

 Leaves elongated, separated. Spiraea. 



65. Stipule-scars encircling the twig : buds large. Magnolia. 

 Stipule-scars not encircling the twig. 66. 



66. Leaves entire or minutely ciliate or serrulate. 67. 

 Leaves distinctly crenate or toothed. 97. 

 Leaves lobed. 139. 



Entire. 



67. Buds naked, or very brown-hairy, 2-ranked. Asimina. 

 Buds with scales, not very hairy. 68. 



68. Aromatic. 69. 



Not markedly aromatic. 71. 



69. With abundant gummy sap when the twigs are cut. Cotinus. 

 Not gummy. 70. 



70. Leaves mucilaginous, mostly lobed : twigs green. Sassafras. 

 Leaves not mucilaginous, never lobed. Benzoin. 



71. Lower leaves often opposite. Lagerstroemia. 

 Leaves all alternate, or clustered above. 72. 



72. Leaves palmately nerved, 2-ranked, rather large. 73. 

 Leaves pinnately veined. 74. 



73. Leaves nearly round : buds small. Cercis. 

 Leaves elliptical : buds long. Corylopsis. 



74. Buds with a single scale : no end-bud. Salix. 

 Bud-scales several. 75. 



75. Twigs constricted at winter-nodes : bark tough. Dirca. 

 Twigs not constricted, or bark not very tough. 76. 



