Ovary simple, 1-eelled; placenta parietal, many-ovuled. 

 Leaves 2-3-ternately compound or dissected. 



Ranitsculaceae, 1. 

 Leaves peltate, palmately lobed. 



Podophyllum, in Berberidaceae, 7. 

 Ovary compound, 1-celled; placentae 2 or more, parietal. 



Sepals caducous; juice milky or colored. PapaveraceAE, 9. 

 Sepals deciduous, 4. Capparidaceae, 16. 



Sepals persistent, 3 or 5. Cistacbae, 17. 



Ovary compound, several-celled. 

 Calyx valvate in the bud, and persistent; stamens monodel- 

 phous; anthers 1-celled. Malvaceae, 23. 



Deciduous; anthers 2-celled. Tiliaceae, 25. 



Calyx imbricated in the bud, persistent. 



Ovaries on many partitions; aquatics. Nymphaeaceae, 7. 

 Ovaries on 5 placentae in the axis. Sarraceniaceae, 9. 

 * * Calyx tnore or less coherent with the surface of the compound ovary. 

 Ovary 8-30-celled; ovules many, on partitions, aquatic. 



Ntmphaeaceae, 7. 

 Ovary apparently 10-celled, each division 1-ovuled. 



Amelanchier, in Pomaceae, 49. 

 Ovary 2-5-celled. 



Leaves alternate, stipulate. Pomaceae, 49. 



Leases opposite, exstipulate. Saxifragaceae, 51. 



Ovary 1-celled; ovules parietal. 

 Fleshy jointed prickly plants; petals many. Cactaceae, 49. 



Rough-leaved plants; petals 5 or 10. Loaceae, 59. 



Ovary 1-celled; placenta free, central; pericarp opening 1 by a lid. 



Portulacaceae, 21. 

 B. Stamens of the same number as the petals and opposite them. 

 Pistil solitary; flowers mostly perfect; herbs, shrubs, or woody vines. 

 Ovary 1-celled; anthers opening by valves. Berberidaceae, 7. 



Ovary 1-celled; anthers longitudinally dehiscent. Portulacaceae, 21 

 Ovary 2-4-celled. 

 Calyx-lobes small or wanting; petals valvate. Vitaceae, 29. 



Calyx 4-5-cleft valvate in the bud; petals involute. Rhamnaceae, 29. 

 Pistils 3-6, separate; flowers dioecious; woody vines. Menispermaceae, 7. 

 C. Stamens of tlie same number .as the petals and alternate with them or not more 

 than twice as many. 



* Ovary superior, the calyx entirely free. 

 t Ovaries 2 or more, separate. 

 Stamens hypogynous, distinct. 

 Leaves pellucid-punctate. Rutaceae, 27. 



Leaves not pellucid-punctate. 

 Tree; leaves odd-pinnate; flowers paniculate. Simarubaceae, 28. 



Herbs; leaves thick, succulent; flowers cymose. Crassulaceae, 53. 

 Herbs; leaves not fleshy; inflorescence various. Ranunclaceae 1. 

 Stamens inserted on the calyx, distinct. 

 Stamens twice as many as the pistils. Crassulaceae 53. 



Stamens neither the same nor twice the number of the pistils. 

 Leaves stipulate. Rosaceae, 44. 



Leaves exstipulate. Saxifragaceae, 51. 



