xvi 
Whe 
78. 
KEYS—LEAVES OPPOSITE 
. Buds without scales: stellate-scurfy. p. 349. Viburnum. 
Buds with scales. 63. 
. Visible scales 1 or 2 pairs. 64. 
Visible scales more than 2 pairs. 70. 
. Buds stalked: scales meeting at their edges. p. 202. Acer. 
Buds not stalked. 65. 
. Leaf-scars distinctly raised. 66. 
Leaf-scars low. 68. 
. Aromatic: lateral bundle-traces very small. p. 67. Meratia. 
Not aromatic: bundle-traces 3, nearly equal. 67. 
. Leaf-scar on a finally torn membrane. p. 74. Philadelphus. 
Leaf-scar not on an articular membrane. p. 353. Lonicera. 
. Leaf-scar thin and tearing at top. p. 74. Philadelphus. 
Leaf-scar not on an articular membrane. 69. 
. Glabrate: with stipule-scars. p. 201. Staphylea. 
Velvety: without stipule-scars. p. 162. Evodia. 
. Buds sometimes superposed. 71. 
Buds not superposed. 72. 
. Leaf-scars raised. p. 353. Lonicera. 
Leaf-sears low. p. 348. Diervilla. 
. Bark exfoliating: traces subconfluent. p. 357. Kolkwitzia. 
Bark not exfoliating, or else bundle-traces separated. 73. 
. Buds nearly globose or else plants pithy. p. 81. Hydrangea. 
Buds conical. p. 202. Acer. 
Buds ovoid or oblong. 74. 
. Buds branching or else leaf-scars meeting: p. 202. Acer. 
Buds remaining solitary. p. 349. Viburnum. 
. Bud-scale 1, forming a closed sac. 76. 
Bud-seales several or indistinct, or lacking. 77. 
. Buds gummy within. p. 349. Viburnum. 
Buds not gummy when opened. D, Lb, wealix. 
Twigs with many ridges. p. 76. Fendlera. 
Twigs without such ridges. 78. 
Very woolly: savory: small. p. 334. Rosmarinus. 
Neither very woolly nor savory. 79. 
