DICOTYLEDONES. 



199 



3. Bignoniaceae. 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 (^Teeoma radicans), as 

 well as the common Catalpa ((7. higno- 

 nioides), occurs both wild and cultivated in ^"^ 



the United States. The western Catalpa ((7. speoiosa) is 

 much hardier than the preceding, and furnishes a rapid 

 growing and durable wood. 



4, Lentibulariaceae. The Bladder'wort 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 

 Utricularia) have insect catching 

 bladders (Fig. 309), others are also 

 310 insectivorous. 



5. Scrophulariaceee. 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 {Antirrhinum), Monkey-flower 

 {Mimulus), 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 Utricularin. Fig. 310. Flowers o! Scraphularid 

 nodosa. Fig. 311. Flower of Toad-Flax {Linaria vulgaris). 



