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. 211) 

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

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

 cjTne 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. i83( 



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



n. 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 s; leaves deeply pinnate-seg- 

 mented. Nemophila in Hydrophyllaceae (p. 185) 

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



Scrophulariaceae (p. 19S) 

 BB. Corolla irregular. 



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



KK. Leaves not all in a basal whorl. 

 L. Ovary 2-celled, many-seeded. Scrophijlaeiaceae (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. Veebenaceae (p. 192) 



AA. Ovary inferior or mainly so. 

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



Linnaea in Capritoliaceae (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. Valerianaceae (p. 214) 



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



pappus. Compositaceae (p. 218) 



GROUP 14 — Dicotyledonous herbs with alternate com- 

 pound leaves 



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

 segments or leaflets. 



