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oncealing the stem --89. 89a. Style 1 or none --90. 89b. Styles 2 to 7 --94. 90a. Stamens 5 --91. 90b. Stamens 10 --92. 90c. Stamens neither 5 nor 10 --93. 91a. Flowers blue, sessile in terminal spikes with leaf-like bracts =LYTHRACEAE=, p. 77. 91b. Flowers not in terminal bracted spikes =PRIMULACEAE=, p. 87. 92a. Leaves entire =LYTHRACEAE=, p. 77. 92b. Leaves toothed or crenate =ERICACEAE=, p. 84. 93a. Flowers irregular; petals 3 =POLYGALACEAE=, p. 65. 93b. Flowers regular; petals 5 or more =LYTHRACEAE=, p. 77. 94a. Sepals 2, partly attached to the ovary =PORTULACACEAE=, p. 34. 94b. Sepals 5, free from the ovary --95. 95a. Stamens 5 --96. 95b. Stamens not 5 =CARYOPHYLLACEAE=, p. 31. 96a. Flowers blue or yellow =LINACEAE=, p. 63. 96b. Flowers white or pinkish =CARYOPHYLLACEAE=, p. 31. --97-- 97a. Perianth with but one circle of floral leaves --98. 97b. Perianth consisting of both calyx and corolla --101. 98a. Flowers small, in dense heads subtended by conspicuous bracts --99. 98b. Flowers 2-5, in a colored spreading 5-lobed involucre =NYCTAGINACEAE=, p. 31. 98c. Flowers in various sorts of clusters or solitary, but never in heads with a conspicuous involucre --100. 99a. Bracts 4, white and conspicuous; stem not thorny 4a, in =CORNACEAE=, p. 83. 99b. Bracts green; stem thorny =DIPSACACEAE=, p. 112. 100a. Stamens 3 =VALERIANACEAE=, p. 111. 100b. Stamens 4 or 5 =RUBIACEAE=, p. 108. 101a. Anthers more numerous than the lobes of the corolla --102. 101b. Anthers just as many as the lobes of the corolla --103. 101c. Anthers fewer than the lobes of the corolla --110. 102a. Leaves simple =POLYGALACEAE=, p. 65. 102b. Leaves compound with 3 leaflets =OXALIDACEAE=, p. 64. 102c. Leaves finely dissected; stems climbing 2a, in =FUMARIACEAE=, p. 41. 103a. Ovaries 2 --104. 103b. Ovary 1, but very d
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