DICOTYLEDONES. 



199 



3. Bignoniaceee. Bignonia family; mostly woody 

 plants, with stamens didynamous or dian- 

 drous, ovary commonly two-celled, many- 

 seeded. The family numbers about five 

 hundred species, found mostly in the Tropics. 

 The Trumpet-flower {Tecoma radiqins), as 

 well as the common Catalpa (C higno- 

 nioides), occurs both wild and cultivated in ^°' 



the United States. The western Catalpa (C. speciosa) is 

 much hardier than the preceding, and furnishes a rapid 

 growing and durable wood. 



4. Lentibulariaceae. The Bladderwort family, 

 comprising aquatic or marsh plants, of temperate and 



cold regions. The flowers are labi- 

 ate, and spurred ; stamens two ; ovary 

 one-celled. The aquatic species (as 

 TJtrieularia) have insect catching 

 bladders (Fig. 309), others are also 

 insectivorous. 



5. Scrophulariacese. Figwort family; herbs or 

 shrubs, rarely trees; corolla irregular (Figs. 310, 311); 

 ovary two-celled. The two thousand species are widely 

 distributed. The family is of little eco- 

 nomic importance. The drug Digitalis 

 is obtained from the Foxglove (Digitalis 

 purpurea) of Europe. Many cultivated 

 species have showy flowers, as Snap- 

 dragon (Aniirrhinwn), Monkey-flower 

 {Mirrvulus), Veronica, etc. Paulownia im- 

 perialis is a cultivated tree in the South- 

 ern States, introduced from Japan. Many 



Fig. 309. Bladder on the stem of Utricularia. Fig. 310. Flowers al Scrophularia 

 nodosa. Fig. 311. Flower of Toad-Flajc (_Linaria vulgaris). 



