xvi Keys Leaves Opposite 



62. Buds without scales: stellate-scurfy. p. 349. Viburnum. 

 Buds with scales. 63. 



63. Visible scales 1 or 2 pairs. 64. 

 Visible scales more than 2 pairs. 70. 



64. Buds stalked: scales meeting at their edges, p. 202. Acer. 

 Buds not stalked. 65. 



65. Leaf-scars distinctly raised. 66. 

 Leaf-scars low. 68. 



66. Aromatic: lateral bundle-traces very small, p. 67. Meratia. 

 Not aromatic: bundle-traces 3, nearly equal. 67. 



67. Leaf-scar on a finally torn membrane, p. 74. Philadelphus. 

 Leaf-scar not on an articular membrane, p. 353. Lonicera. 



68. Leaf-scar thin and tearing at top. p. 74. Philadelphus. 

 Leaf-scar not on an articular membrane. 69. 



69. Glabrate: with stipule-scars. p. 201. Staphylea. 

 Velvety: without stipule-scars. p. 162. Evodia. 



70. Buds sometimes superposed. 71. 

 Buds not superposed. 72. 



71. Leaf-scars raised. p. 353. Lonicera. 

 Leaf-scars low. p. 348. Diervilla. 



72. Bark exfoliating: traces subconfluent. p. 357. Kolkwitzia. 

 Bark not exfoliating, or else bundle-traces separated. 73. 



73. Buds nearly globose or else plants pithy, p. 81. Hydrangea. 

 Buds conical. p. 202. Acer. 

 Buds ovoid or oblong. 74. 



74. Buds branching or else leaf-scars meeting. p. 202. Acer. 

 Buds remaining solitary. p. 349. Viburnum. 



75. Bud-scale 1, forming a closed sac. 76. 

 Bud-scales several or indistinct, or lacking. 77. 



76. Buds gummy within. p. 349. Viburnum. 

 Buds not gummy when opened. p. 11. Salix. 



77. Twigs with many ridges. p. 76. Fendlera. 

 Twigs without such ridges. 78. 



78. Very woolly: savory: small. p. 334. Rosmarinus. 

 Neither very woolly nor savory. 79. 



