16 KEY TO THE FAMILIES. 



79. Herbs; styles 2-3 or 5; fruit a berry or drupe, - - 132 Hederaceae 

 80. Herbs, rarely shrubby; ovary 1-6 celled, fruit a capsule, - 129 Epilobiaceae 

 80. Herbs; flowers in umbels; fruit of two united carpels, - 133 Ammiaceae 

 80. Herbs, trailing or climbing by tendrils; fruit a pepo, - 169 Cucurbitaceae 

 80. Vines, evergreen; flowers 5-parted; fruit berry-like, - - 132 Hederaceae 

 80. Shrubs or trees; flowers 4-5 parted; ovary 1-4 celled, 81 



81. Petals strongly concave, hooded; ovary 3, rarely 2-celled, 109 Frangulaceae 

 81. Petals not hooded; ovary 1-2, rarely 3-celled, - - 131 Nyssaceae 

 82. Ovaries 2; styles 2, distinct, - 147 Dichondraceae 



82. Ovary free from the calyx, superior or nearly so, 83 



82. Ovary more or less adnate to the calyx, inferior, - - - - 112 



83. Stamens free from the corolla, --------84 



83. Stamens more or less adnate to the corolla, ----- 87 



84. Ovary simple, 1-celled, sometimes several-celled by cross-partitions, - 85 

 84. Ovary compound, - -____-__ 86 



85. Corolla regular of 3-6 partially united petals, - - 91 Mimosaceae 



85. Corolla papilionaceous, two of the petals united or cohering, 93 Fabaceae 



86. Ovary 1-celled, styles filiform; stamens 5, distinct, - - 137 Armeriaceae 



86. Ovary 2-celled, styles united; stamens 8 or 6 in 1 or 2 sets, - 100 Polygalaceae 



86. Ovary 2-6 celled, styles short or wanting, stigma lobed; stamens 



4-6, distinct, _____-- 105 Aquifoliaceae 



86. Ovary 2-7 celled, styles united, stamens 4-12, distinct, - 135 Ericaceae 



87. Stamens as many as the lobes of the corolla and opposite them, 



— or twice as many, — or more, ---- . 88 



87. Stamens as many as the lobes of the corolla and alternate with 



them, — or fewer, ----------93 



88. Ovary 1-celled; stamens and corolla -lobes 5, ----- 89 



88. Ovary 2-celled; stamens 6 or 8 in 1 or 2 sets, - - 100 Polygalaceae 



88. Ovary several celled or consisting of as many carpels as there 



are sepals, either distinct or partially united, — or fewer, - - - 90 

 89. Shrubs or acaulescent herbs, - - - - 137 Armeriaceae 



89. Caulescent herbs, ___--_- 138 Primulaceae 

 90. Stamens several, monadelphous, ----- m Malvaceae 



90. Stamens united into 5 groups, ------ H4 Theaceae 



90. Stamens not monadelphous and not in 5 groups, ----- 91 



91. Herbs; calyx and corolla 4-lobed, stamens 8, - - - 80 Sedaceae 

 91. Shrubs or trees, ----------92 



92. Flowers perfect; corolla 4-7 lobed, stamens 4-14, - - - 135 Ericaceae 

 92. Flowers perfect; corolla 4-several lobed, stamens alternating with 



staminodia, -------- 140 Sapotaceae 



92. Flowers dioecious; corolla 3-7 lobed, stamens 4-16 or more, 139 Ebenaceae 

 93. Evergreen shrubs or trees, --------94 



93. No evergreens, or evergreen climbers and trailers, - - - - 96 



94. Flowers regular, ----------- 95 



94. Flowers irregular, -------- 162 Bignoniaceae 



95. Stamens 2, ----_-.--- 141 Oleaceae 



95. Stamens 4-6, flowers small, - - - 105 Aquifoliaceae 



95. Stamens 5, flowers of medium size, ovary 1-2 celled, - 145 Apocynaceae 



95. Stamens 5, flowers of medium size, ovary 4-celled, 154 Ehretiaceae 



96. Aquatic herbs with broad floating leaf -blades on long petioles, 144 Menyanthaceae 



96. Herbaceous parasites, leaves reduced to scales, ----- 97 



96. Neither aquatic nor parasitic plants, -------98 



