KEY TO THE GENERA OF MANHATTAN PLANTS. 



60. Capsule dehiscing by holes in the side Campanulaceae 91 



60. Capsule many seeded enclosed in a spathe, aquatic 



endogens Heteranthera 17 



60. Capsule bursting irregularly, or opening by a hole 



or irregularly at top 61 



60. Capsule dehiscing regularly 65 



61. Capsule 1-celled 62 



61. I apsule 2 celled, 1-3 seeded, vines 63 



61 . Capsule 4-celled, many seeded 64 



62. Globose, placenta central, calyx inferior. Utricularia 231 



62. Oblong, placentae parietal, calyx superior Mentzelia 157 



63. Globose, smooth ; parasitic, vines Cuscuta 192 



63. Ovoid, prickly; not parasitic Echinocystis 241 



64. Enclosed in 4-angled calyx Ammannia 160 and Itotala 161 



64. Capsule 4-angled, calyx lobes 4, superior Ludwigia 164 



65. Dehiscence by a circumcissile line 66 



65. Dehiscence not circumcissile 68 



66. Capsule 2-celled, few seeded Plantayo 235 



66. Capsule 1-celled, many seeded 67 



67. Sepals 2, broad and enclosing the sessile capsule Portnlaca 57 



67. Sepals 5, narrow, erect, pedicels slender Anagallis 185 



68. Capsule 1-celled, 1 2-seeded, 2-vaived somewhat 



fleshy Xanthoxylum 126 



68. Capsule 1-celled, placenta central, seeds four or more 69 



68. Capsule 1 celled with parietal placentae or 2-3 celled 78 



68. Capsule 4-celled, calyx superior, seeds numerous 71 



68. Capsule 5 or more celled 72 



69. 3-valved at summit 70 



(Compare Solarium rostratum 219.) 



69. 5 valved at summit, in umbels Androsace 183 



69. 6-valved at summit Silene 58 



70. Capsule enclosed in wing-angled calyx, seeds globose, 



about 4 Saponaria 59 



70. Not enclosed in calyx, seeds several, angled Steironema 184 



71. Seeds comose Epilnbium 165 



71. Seeds not comose Onagra, etc., 166 



72. Calyx superior, capsule 10 ribbed, tapering at base Jussiaea 163 



72. Calyx adherent to lower part of 5 horned capsule Penthorum 86 



72. Calyx inferior ... 73 



73. Capsule more than 5-celled 74 



73. Capsule 5-celled 75 



74. Imperfectly 10 celled, 10 seeded Linum 125 



74. 12-15 celled, seeds about 3 in each cell Abutilon 146 



75 Seeds 1 in each cell, capsule elastically 5 valved from 



below Geranium 123 



75. Seeds more than 1 in each cell 76 



