xiv 



75a. Twigs with a prominent hairy ridge extending downward from 

 the middle of the line connecting the petiole bases 



13a, in CAPRIFOLIACEAE, p. 110. 

 75b. Twigs without any pubescent ridge 76. 



76a. Erect shrubs; leaves obviously toothed 



lib, in CAPRIFOLIACEAE, p. 110. 



76b. Spreading shrubs; most of the leaves entire, and only here 

 and there some with serrate margins 



18b, in CAPRIFOLIACEAE, p. 110. 

 77a. Leaves silvery beneath with a dense coating of scales 



ELAEAGNACEAE, p. 77. 



77b. Leaves green beneath, or somewhat hairy and light-colored 78. 



78a. Aquatic plant with lanceolate leaves, and stems bending 



over and into the water la, in LYTHRACEAE, p. 77. 



78b. Not truly aquatic, although frequently in wet places 79. 



79a. Leaves evergreen, as shown by their presence on the older stems 



18a, in ERICACEAE, p. 85. 

 79b. Leaves deciduous each year 80. 



80a. Leaves dotted with translucent dots, easily seen when the 

 leaf is held to the light la, in HYPERICACEAE, p. 73. 



80b. Leaves not dotted with translucent dots 81. 



81a. Lateral veins curved forward and running almost parallel to 

 the leaf-margin CORNACEAE, p.. 83. 



81b. Lateral veins spreading, and not paralleling the leaf-margin 82. 



82a. Leaves with stipules la, in RUBIACEAE, p. 108. 



82b. Leaves with a prominent ridge connecting them at the base 



83. 

 82c. Leaves with neither stipules nor connecting ridges 



la, in OLEACEAE, p. 88. 

 83a. Bundle-scar one in each leaf-scar 



18b, in CAPRIFOLIACEAE, p. 110. 

 83b. Bundle-scars three in each leaf-scar (Honeysuckle) 



12, in CAPRIFOLIACEAE, p. 110. 

 84a. Leaves compound 85. 

 84b. Leaves simple 95. 

 S5a. Stems prickly or thorny 86. 

 85b. Stems without prickles or thorns 88. 



86a. Leaves twice-pinnate 4a, in ARALIACEAE, p. 80. 



86b. Leaves evenly pinnate 5b, in LEGUMINOSAE, p. 58. 



86c. Leaves odd-pinnate or trifoliate 87. 



87a. Leaflets entire la, in RUTACEAE, p. 65. 



87b. Leaflets serrate 3b, in ROSACEAE, p. 51. 



88a. Leaflets 3 89. 



88b. Lea'flets 5 to many 91. 



