General Key to Families xxxvii 



(a) Flowers with 2 sepals and 5 petals ; corolla 

 pink. Portulacaceae. 



(fc) Flowers with 3 sepals and 3 petals; seeds 

 triangular. Polygonaceae. 



(c) Flowers with 4 sepals and 4 petals. Stem 



angular; leaves in whorls. Rubiaceae. 

 Stem round; leaves not in whorls. 

 Stamens 6, erect. Brassicaceae. 



Stamens 8, spreading. Onagraceae. 



(d) Flowers with 5 sepals or petals, distinct, 

 f Stamens as many or twice as many as the 



corolla lobes. 

 Stems swollen at the nodes. 



Caryophyllaceae . 

 Stems not swollen at the nodes. 



Stem leaves numerous, entire, thin; 

 flowers in terminal or axillary clus- 

 ters, white or greenish. 



Santalaceae. 



Leaves basal, entire; flowers solitary 

 on a i -leaved scape. Parnassiaceae. 

 Leaves mostly basal, lobed or cut; 

 flowers in a close spike or head. 



Saxifragaceae. 

 Leaves and stems fleshy. 



Follicles 2. Saxifragaceae. 



Follicles 4. Crassulaceae. 



Leaves numerous, stiff, awl-shaped; 



stems low, tufted Saxifragaceae. 



ttStamens more than twice as many as 



the corolla lobes. 

 Leaves basal or mostly so. 



Leaves evergreen, simple or lobed, 

 flowers yellow or white, solitary on 

 naked scapes. (Dryas.) Rosaceae. 



