SHRUBS xxv 



Deciduous Shrubs Unarmed. 



66. Leaves alternate or on alternate spurs. 67. 

 Leaves opposite, or in 4 ranks if separated. 180. 



* Leaves- whorled (often also opposite). 243. 

 Leaves alternate. 



67. Leaves simple or appearing so. 68. 

 Leaves distinctly compound. 155. 



Simple. 



68. Leaves extremely small or very narrow. 69. 

 Leaves relatively larger or broader. 70. 



69. Leaves almost scale-like, overlapping. p. 105. Tamarix. 

 Leaves elongated, not overlapping. p. 54. Spiraea. 



70. Stipule-scars encircling the twig. p. 42. Magnolia. 

 Stipule-scars if pres'ent not encircling the twig. 71. 



71. Leaves essentially entire. 72. 



Leaves distinctly crenate or toothed. 103. 

 Leaves, or some of them, lobed. 144. 

 Entire. 



72. Aromatic or spicy. 73. 



Not markedly aromatic. 75. 



73. Twigs with abundant gummy sap. p. 85. Cotinus. 

 Sap not gummy: twigs green. 74. 



74. Leaves often lobed, mucilaginous. p. 44. Sassafras. 

 Leaves neither lobed nor mucilaginous. p. 44. Benzoin. 



75. Lower leaves opposite. p. 108. Lagerstroemia. 

 Leaves all alternate, or clustered above. 76. 



76. Leaves palmately nerved, 2-ranked, rather large. 77. 

 Leaves pinnately veined. 78. 



77. Leaves nearly round: buds 1 small. p. 70. Cercis. 

 Leaves elliptic: buds elongated. p. 50. Corylopsis. 



78. Buds with a single scale, in front. p. 19. Salix. 

 Buds naked or, usually, with several scales. 79. 



79. Twigs constricted at winter-nodes. p. 106. Dirca. 

 Twigs not constricted. 80. 



80. End-bud naked, lateral buds globose. p. 43. Asimina. 

 Buds all scaly. 81. 



