24 KEY TO THE FAMILIES 



Style 1, entire; capsule or berry 2- 



celled Solanaceae, 213 



Corolla irregular (from strongly 2-lipped to nearly 

 regular) ; stamens with anthers 4 or 2; style 1. 



Ovary 4-parted, forming 4 seed-like nutlets Labiatae, 207 



Ovary and capsule 2-celled Scrophulariaceae, 213 



Ovary and capsule 1-celled. 



Parasites without green foliage Orobanchaceae, 229 



Aquatics with finely cut green leaves . Lentibulariaceae, 230 

 Calyx adherent to the ovary. (Ovary inferior.) 

 Stamens distinct from each other. 

 Leaves alternate; flowers regular; stamens 5; 



herbs Campanulaceae, 237 



Leaves opposite or whorled. 

 Stamens 1 to 3; flowers irregular, small. Valerian aceae, 236 

 Stamens 4 or 5, rarely 2. 



Leaves either opposite and with stipules, or 



whorled and without stipules Rubiaceae, 231 



Leaves opposite or perfoliate, but neither 



whorled nor with true stipules. . Caprifoliaceae, 233 

 Stamens united into a tube around the style. 

 Flowers not in heads; fruit many-seeded ... Lobeliaceae, 238 

 Flowers in a head with a calyx-like involucre; 



fruit 1-seeded Compositae, 239 



