KEY TO THE FAMILIES. 15 



63. Stamens as many as the petals, monadelphous, adhering to the 



stalk of the 1-celled ovary; chiefly climbers or trailers. 118 Passifloraceae 

 63. Stamens as many as the petals and opposite them, 64 



63. Stamens as many as the petals and alternate with them, or more, - 65 

 64. Sepals minute, ovary 2-6 celled, ----- HO Vitaceae 

 64. Sepals manifest, ovary 3-celled, - 109 Frangulaceae 



65. Stamens twice or more than twice the number of petals, - - - 66 

 65. Stamens as many as or more than the petals, - - - - - 69 

 65. Stamens of the same number as the petals, shrubs or trees, 70 



66. Erect herbs. - -- 67 



66. Shrubs, trees or climbing herbs, - -- ----68 



67. Petals 4-7. stamens 8-20, ovary 1-celled; cultivated plants, - 77 Resedaceae 

 67. Petals 4, stamens S. ovary 4-celled. styles united, - 124 Melastomaceae 

 67. Petals 5, stamens 10, ovary 1-celled, styles 3-5, - 67 Caryophyllaceae 

 68. Calyx cup-shaped, petals 4-8, stamens 20-60, ovary several-celled, 



styles united, -------- 98 Rutaceae 



68. Sepals 4-5 in two rows, petals 4-5, stamens 8-10, ovary 2-4 celled, 



styles partially united, ------ 108 Sapindaceae 



68. Sepals and petals 3-5; stamens 8-10 united into a tube, ovary 



3-5 celled, styles united, ------ 99 Meliaceae 



69. Sepals 5, petals 4-5, stamens 5-8, ovary 3-celled, style 



slender, ------ _- 106 Aesculaceae 



69. Sepals and petals 4-7, stamens 4-numerous, often in rows, 



ovary 1-6 celled, style filiform, - - - - 125 Lythraceae 



70. Leaves pinnately compound; sepals, petals and stamens each 4-6; 



ovary 1-celled, fruit a drupe or berry, - - - 104 Spondiaceae 

 70. Leaves lobed or palmately compound; sepals, petals and stamens 



each 4-9; ovary 2-celled, fruit a samara, - - - 107 Aceraceae 

 71. Stamens more than twice the number of petals, - - - - 72 



71. Stamens not more than twice the number of petals, - - - - - 76 



72. Maritime shrubs or trees, ------ 128 Rhizophoraceae 



72. Fresh-water plants, -------74 Nymphaeaceae 



72. Landplants, --------- - -73 



73. Styles distinct, --- ____-89 Malaceae 



73. Styles united, - ---- .... 74 



74. Vines, shrubs or trees, --------- 75 



74. Succulent herbs, sometimes shrubby; flowers monoecious; leaves 



usually obliquely ovate or reniform, - - - - 120 Begoniaceae 



74. Succulent plants without leaves, _ _ - - - 119 Opuntiaceae 

 75. Vines and erect shrubs, flowers white, fruit a capsule, - 82 Escalloniaceae 

 75. Shrubs and small trees, flowers scarlet, fruit a berry, - 126 Punicaceae 

 75. Shrubs and small trees, flowers white, fruit a berry; — or tall 



trees with fruit a capsule, - - - - - - 127 Myrtaceae 



76. Styles wanting, stigmas 1-4; decumbent aquatic herbs, 130 Gunneraceae 



76. Styles distinct, ----- -77 



76. Styles united, or style single, rarely wanting, ----- 80 



77. Flowers not in umbels, ---------78 



77. Flowers in umbels, ----------79 



78. Herbs; sepals 2, deciduous; ovary 1-celled, styles 2-8, - 65 Portulacaceae 

 78. Shrubs ot trees; calyx 4-5 lobed to truncate; ovary 2-4 celled: 



styles 2-4, sometimes slightly united, 82 Escalloniaceae 



79. Herbs; styles 2; fruit dry, of two united carpels, - - 133 Ammiaceae 



