A KEY TO THE FAMILIES 



PAGE 



b. Corolla more or less irregular, 

 c. Fruit a many-seeded capsule, 

 d. Ovary two-celled. 



Scrophulariaceae 466 

 d. Ovary one : celled; plants without 



green foliage. Orobanchaceae 504 

 c. Fruit of two or four seed-like nut- 

 lets, 

 d. Ovary four-lobed; plants mostly 



aromatic. Labiatae 434 



d. Ovary not lobed; plants rarely 



aromatic. Verbenaceae 434 



E. Ovary inferior. 



a. Stamens eight or ten; evergreen shrubs. 



Ericaceae 340 

 a. Stamens five or fewer in number. 



b. Plants tendril-bearing. Cucurbitaceae 518 

 b. Plants not tendril-bearing. 

 c. Stamens free, not united. 



d. Leaves alternate; stamens free 



from the corolla. Campanulaceae 520 

 d. Leaves opposite or whorled; sta- 

 mens inserted on the corolla, 

 e. Stamens one to three. 



V ' alerianaceae 508 

 e. Stamens four to five. 



f. Leaves opposite, never in 

 whorls nor with stipules. 



Caprifoliaceae 512 

 f. Leaves opposite and with 

 stipules, or in whorls and 

 without stipules. 



Rubiaeeae 506 



c. Stamens united by their anthers, 

 d. Corollas all strap-shaped and per- 

 fect; juice milky. Cichoriaceae 570 

 d. Marginal corollas strap-shaped, 

 never perfect; disk corollas per- 

 fect; juice not milky. 



Compositae 522 



