32 Key to the Families 



y. Stamens inserted on the calyx. 



Plant fleshy ; stamens not twice as many as the pistils 



115. Crassulaceae, p. 513. 



Plant not fleshy; stamens not twice as many as the pistils. 



Stipules present 126. Rosaceae, p. 524. 



Stipules none 117. Saxifragaceae, p. 514. 



w. Ovary 1 z. 



z. Ovary simple with 1 parietal placenta 128. Leguminosae, p. 582. 



z. Ovary compound, as shown by the number of its cells, placentae, styles, 

 or stigmas A. 

 A. Ovai'y 1-celled. 

 Corolla irregular. 



Petals 4; stamens 6 104A. Fumariaceae, p. 482. 



Petals and stamens 5 198. Violaceae, p. 681. 



Corolla regular or nearly so. 

 Ovule solitary. 



Trees or shrubs 153. Anacardiaceae, p. 648. 



Herbs 105. Cruciferae, p. 484. 



Ovules more than one. 



Ovules at the center or bottom of the cell. 



Petals not inserted on the calyx. .87. Caryophyllaceae, p. 435. 

 Petals inserted on the throat of a bell-shaped or tubular calyx. 



216. Lythraceae, p. 695. 



Ovules on 2 or more parietal placentae. 



Leaves punctate with transparent dots 



187. Hypericaceae, p. 671. 



Leaves with gland-tipped bristles. . .112. Droseraceae, p. 512. 

 Leaves neither punctate nor bristly-glandular. 

 Petals 4. 



Stamens essentially equal ; pod usually stipitate 



107. Capparidaceae, p. 510. 



Stamens unequal, 2 being shorter than the other 4; pod 



sessile 105. Cruciferae, p. 484. 



Petals 3 or 5. 



Ovary stipitate 203. Passifloraceae, p. 693. 



Ovary sessile. 



Calyx 5-lobed or of 5 equal sepals 



117. Saxifragaceae, p. 514. 



Calyx of 3 equal or 5 very unequal sepals 



193. Cistaceae, p. 677. 



A. Ovary 2-several-celled B. 

 B. Flowers irregular C. 



C. Anthers opening at the top 145. Polygalaceae, p. 633. 



C. Anthers opening lengthwise. 



Stamens 12 and petals 6 on the throat of the gibbous calyx 



5478. Cuphea p. 698. 



Stamens 5-10 and petals hypogynous or nearly so. 



Ovary 3-celled; trees or shrubs 4721. Aesculus, p. 658. 



Ovary 5-celled; hero s . 168. Balsaminaceae, p. 659. 



B. Flowers regular or nearly so D. 



D. Stamens neither just as many nor twice as many as the petals. 

 Trees or shrubs. 



Stamens fewer than the 4 petals 243. Oleaceae, p. 751. 



Stamens more numerous than the petals 



163. Aceraceae, p. 654. 



