THE DICOTYLEDOXES 



192T 



Fig. 1846. — LiiKiria vulgaris. Yellow 

 Toadflax. Flowers, with long spurs. 



are about 130 species, three of which occur in Britain, under the name 

 Figwort. The flowers are reddish-brown in colour and are borne on com- 

 pound inflorescences, the main 

 branching being racemose and 

 the secondary shoots dichasial. 

 In S. nodosa the flowers are 

 protogynous and nectar is 

 secreted by glands situated in 

 the base of the widely open 

 corolla. These flowers are al- 

 most exclusively visited by 

 wasps, both in Europe and in 

 North America (Fig. 1847). 

 Should pollination by their 

 agency fail the stigma remains 

 receptive and self-pollination 

 may be effected by pollen from 

 the ripe anthers falling upon the 

 stigmatic surface from above. 

 Cleistogamic flowers are said to 

 be produced occasionally by this 

 species. 



1'he third sub-family, the Fig. 1847.— Scophnlarij nodosa. A. Early 

 Rhinanthoideae, includes all the stage with stigma extruded and receptive. 



, B, Stamens elongated, when seif-poUina- 



semi-parasitic genera such as tion becomes possible. 



