FAMILY KEY 21 



CC. Leaves not markedly thick and fleshy; stamens as many as the lobes of the 

 corolla or fewer; pistil i and compound (except possibly in BORAGINACEAE). 

 D. Ovary deeply 4-lobed, forming 4 separate or separable nutlets. 



BORAGINACEAE (p. 187) 

 DD. Ovary deeply 2-lobed, separating or separable into 2 fleshy or dry fruits. 



RUBIACEAE (p. 2Il) 



DDD. Ovary not deeply lobed, neither separating nor separable into nutlets. 

 E. Leaves evergreen, coriaceous; flowers terminal, solitary, or in a raceme or 

 cyme or umbel; ovary and capsule 4-s-celled. PYROLACEAE (p. 169) 



EE. Leaves mostly not evergreen, not coriaceous; flowers not terminal when 



the leaves are evergreen. 



F. Style i ; stigmas 3; capsules-celled. POLEMONIACEAE (p. 183) 



FF. Styles 1-2; stigmas as many as the styles; capsule i-2-celled. 

 G. Leaves entire. 



H. Stamens often fewer than the corolla lobes; ovary either 2-celled 



or else i-celled with parietal placentae. SCROPHULARIACEAE (p. 198) 



HH. Stamens as many as the corolla lobes; ovary i-celled; placenta central. 



I. Stamens alternate with the corolla lobes; plant without potato-like 

 base. GENTIANACEAE (p. 178) 



II. Stamens opposite the corolla lobes; plant from small potato-like base. 



Trientalis in PRIMULACEAE (p. 175) 

 GG. Leaves not entire. 



J. Ovary and capsule i -celled; stamens 5; leaves deeply pinnate-seg- 

 mented. Nemophila in HYDROPHYLLACEAE (p. 185) 

 JJ. Ovary and capsule 2-celled; stamens 2-5; leaves various. 



SCROPHULARIACEAE (p. 198) 

 BB. Corolla irregular. 



K. Leaves all in a basal whorl. PINGUICULACEAE (p. 210) 



KK. Leaves not all in a basal whorl. 



L. Ovary 2-celled, many-seeded. SCROPHULARIACEAE (p. 198) 



LL. Ovary 4-celled, 4-seeded. 



M. Ovary deeply 4-lobed or -parted; flowers i to many in the leaf axils, or in 

 terminal heads or spikes or racemes or panicles. MENTHACEAE (p. 192) 



MM. Ovary 4-celled, terete or nearly so; flowers in terminal solitary or 

 clustered spikes. VERBENACEAE (p. 192) 



AA. Ovary inferior or mainly so. 

 N. Vinelike, prostrate, evergreen; peduncles 2-flowered. 



Linnaea in CAPRIFOLIACEAE (p. 212) 



NN. Not vinelike, not prostrate, mostly not evergreen; peduncles not 2-flowered. 



O. Stamens 3, distinct; flowers in most species not in heads; calyx 4-toothed or 



-lobed, not a pappus. VALERIAN ACE AE (p. 214) 



OO. Stamens 4-5, their anthers united ; flowers in heads ; calyx in most species a 



pappus. COMPOSITACEAE (p. 2l8) 



GROUP 14 Dicotyledonous herbs with alternate com- 

 pound leaves 



A. Plants submerged or floating ; leaves dissected into narrowly linear or filiform 

 segments or leaflets. 



