KEY TO THE FAMILIES 21 



B. Stamens not more than double the number of petals. 



Calyx free from the ovary or ovaries. (Ovary 



superior.) (For "2. Calyx adherent," see p. 22.) 



Pistils more than one and distinct from each other. 



Petals and sepals of just the same number as pistils. 



Leaves simple, fleshy Crassulaceae, 113 



Leaves pinnately compound Floerkia, 149 



Petals and sepals not of same number as pistils. 



Stipules persistent; leaves alternate Rosaceae, 123 



Stipules none or indistinct. 



Petals and stamens 5 or 10 each Saxifragaceae, 115 



Petals (red) and stamens numerous 



Calycanthaceae, 101 

 Pistil only one. 



Pistil simple, as shown by the single style, stigma, 

 and ovary-cell. 

 Flowers irregular; stamens united; fruit a sev- 

 eral-seeded pod Leguminosae, 135 



Flowers regular; stamens not united. 



Calyx 5-lobed ; fruit 1-seeded Rosaceae, 123 



Calyx of 2 sepals ; fruit several-seeded ; leaves 



fleshy Portulacaceae, 84 



Pistil compound. 

 Ovary 1-celled. 

 Corolla irregular, the petals unlike. 



Sepals 5; petals 5, the lower one spurred. 



Violaceae, 159 

 Sepals 2; petals 4, none spurred; corolla 



heart-shaped at base Fumariaceae, 102 



Corolla regular, the petals all alike. 



Shrubs with 1-seeded fruits Anacardiaceae, 151 



Herbs; capsule several to many-seeded. 



Sepals 2 ; herbage fleshy Portulacaceae, 84 



Sepals 4 or 5 ; leaves scale-like, not green. 



Pleuricospora, 177 

 Sepals or calyx-lobes 4 or 5 ; leaves green. 



Leaves all opposite Caryophyllaceae, 88 



Leaves all at base, roundish Droseraceae, 112 



Ovary and usually the fruit 2-celled. 

 Fruit a capsule, rarely winged; herbs. .Cruciferae, 103 

 Fruit winged; trees. 



Leaves simple, palmately lobed Aceraceae, 153 



Leaves pinnately compound Oleaceae, 184 



Ovary more than 2-celled. 

 Anthers opening by pores at the top Ericaceae, 174 



