CONTENTS. vii 



74. Oxalidaceae 220 



75. Zygophyllaceae 220 



76. Rutaceae 221 



Order 29. Polygalales 221 



Family 77. Polygalaceae 221 



Order 30. Euphorbiales 221 



Family 78. Euphorbiaceae 222 



79. Callitrichaceae 225 



Order 31. Sapindales 225 



Family 80. Limnanthaceae 225 



81. Spondiaceae 225 



82. Celastraceae 226 



83. Aceraceae 226 



Order 32. Rhamnales 227 



Family 84. Frangulaceae 227 



85. Vitaceae 228 



Order 33. Malvales 229 



Family 86. Malvaceae 229 



Order 34. Hypericales 231 



Family 87. Elatinaceae 231 



88. Frankeniaceae 231 



89. Hypericaceae 231 



90. Cistaceae 232 



91. Violaceae 232 



Order 35. Opuntiales 234 



Family 92. Loasaceae 234 



93. Cactaceae 237 



Order 36. Thymeliales 239 



Family 94. Elaeagnaceae 239 



Order 37. Myrtales 240 



Family 95. Lythraceae 240 



96. Epilobiaceae 240 



97. Gunneraceae 248 



Order 38. Umbellales ' 249 



Family 98. Hederaceae 249 



99. Cornaceae 249 



100. Ammiaceae 250 



Order 39. Ericales 258 



Family 101. Monotropaceae 258 



102. Pyrolaceae 258 



103. Ericaceae 259 



104. Vacciniaceae 260 



Order 40. Prinulales 261 



Family 105. Primulaceae 261 



Order 41. Oleales 264 



Family 106. Oleaceae 264 



Order 42. Gentianales 264 



Family 107. Gentianaceae 264 



108. Menyanthaceae 268 



Order 43. Asclepiadales 269 



Family 109. Apocynaceae 269 



1 10. Asclepiadaceae '. 270 



Order 44. Polemoniales 271 



Family 1 1 1. Cuscutaceae 272 



1 12. Convolvulaceae 273 



1 13. Polemoniaceae 274 



1 14. Hydroleaceae 281 



1 15. Heliotropaceae 284 



1 16. Boraginaceae 284 



