30 Key to the Families 



k. Ovary single m. 



m. Ovary 5-celled, 5-beaked; leaves scattered 



. . . . 3173. Penthorum, p. 514. 



m. Ovary 3-5-celled; leaves opposite or whorled 



84. Aizoaceae, p. 434. 



m. Ovary 1- or 2-celled. 



Leaves compound 91. Ranunculaceae, p. 454. 



Leaves simple. 



Style 1 216. Lythraceae, p. 695. 



Styles 2-5 87. Caryophyllaceae, p. 435. 



j. Ovary and pod inferior. 



Ovary 1-celled; stamens 8-10 3199. Chrysosplenium, p. 519. 



Ovary 4-celled; stamens 4 5793. Ludwigia, p. 700. 



Ovary 6-celled; stamens 6-12 74. Aristolochiaceae, p. 403. 



T. Corolla and calyx both present n. 

 n. Corolla of separate petals o. 



o. Stamens numerous, at least more than 10 (rarely 9 or 10 in Polanisia) , and 

 more than twice as many as the sepals or calyx lobes p. 

 p. Calyx entirely free and separate from the pistil or pistils q. 

 q. Pistils several or many, wholly distinct or united at the base into a strongly 

 lobed or several-beaked ovary r. 



r. Aquatic plants with peltate leaves 88. Nymph aeaceae, p. 450. 



r. Terrestrial plants. 

 Plants climbing. 



Leaves alternate 94. Menispermaceae, p. 477. 



Leaves opposite 2542. Clematis, p. 463. 



Plants not climbing. 



Filaments of stamens united into a tube 175. Malvaceae, p. 666. 



Filaments not united. 



Stamens on the calyx 126. Rosaceae, p. 524. 



Stamens on the receptacle or disk. 

 Trees or shrubs. 



Sepals and petals imbricated; fruit aggregate 



95. Magnoliaceae, p. 478. 



Sepals and petals valvate ; fruit not aggregate 



98. Annonaceae, p. 479. 



Herbs; inflorescence simple; pistils several, simple 



91. Ranunculaceae, p. 454. 



q. Pistils strictly one as to ovary; the styles or stigmas may be several s. 



s. Leaves punctate with translucent dots 187. Hypericaceae, p. 671. 



s. Leaves not punctate t. 

 t. Ovary simple, 1-celled. 



Ovules 2 126. Rosaceae, p. 524. 



Ovules many. 



Leaves 2- or 3-ternately compound or dissected 



91. Ranunculaceae, p. 454. 



Leaves peltate, lobed 2558. Podophyllum, p. 475. 



t. Ovary compound. 

 Ovary 1-celled. 

 Sepals 2 (rarely 3), caducous; sap milky or colored; placentae 



parietal 104. Papaveraceae, p. 481. 



Sepals 2 ; sap watery ; placentae central 



85. PORTULACACEAE, p. 434. 



Sepals 4; sap watery; placentae parietal. .107. Capparidaceae, p. 510. 



Sepals 3 or 5, persistent; sap watery; placentae parietal 



193. Cistaceae, p. 677. 



