xiii 



57a. Thorny vines 58. 

 57b. Not thorny 60. 



58a. Climbing by tendrils at the base of the leaves 



4b, in LILIACEAE, p. 11. 



58b. Tendrils none 59. 



59a. Leaves simple 5a, in SOLAtfACEAE, p. 100. 



59b. Leaves compound 8a, in ROSACEAE, p. ' 52, 



60a. Leaves compound 61. 



60b. Lea\es simple 63. 



61a. Leaves with 5 leaflets la, in YITACEAE, p. 71. 



61b. Leaves with 3 leaflets 62. 



62a. Plant climbing by tendril-like leaf-stalks 



la, in RANUNCULACEAE, p. 35. 

 62b. Plant climbing by hold-fast roots 



5b, in ANACARDIACEAE, p. 69. 



63a. Leaves opposite 5a, in CAPRIFOLIACEAE, p. 110. 



63b. Leaves alternate 64. 



64a. Plants climbing by tendrils Ib, in VITACEAE, p. 71. 



64b. Twining plants 65. 



65a. Leaves ovate-oblong, attached by the base 



la, in CELASTRACEAE, p. 69. 

 65b. Leaves almost round, peltate near the edge 



MENISPERMACEAE p. 40. 



66a. Leaves opposite 67. 

 66b. Leaves alternate 84. 



67a. Leaves compound 68. 

 67b. Leaves simple 69. 



68a. Leaflets 3 STAPHYLEACEAE, p. 69. 



68b. Leaflets 7 or more la, in CAPRIFOLIACEAE, p. 109. 



69a. Leaves palmately veined, or at least with a pair of prominent 



lateral veins from the base 70. 

 69b. Leaves pinnately veined 72. 



70a. Leaves not lobed Ib, in RHAMNACEAE, p. 71, 



70b. Leaves more or less lobed 71. 



71a. Leaves with stipules 22a, in CAPRIFOLIACEAE, p. 111. 



71b. Leaves without stipules 2a, in ACERACEAE, p. 70. 



72a. Leaves serrate 73. 

 72b. Leaves entire 77. 



73a. Stem thorny Ib, in RHAMNACEAE, p. 71. 



73b. Stem not thorny 74. 



74a. Bark of the ripe twigs green Ib, in CELASTRACEAE, p. 69. 

 74b. Bark of the ripe twigs brown, reddish, or gray 75. 



