THE NEMESIA AND HARVEYA FAMILY. 193 



Several species are cultivated in gardens, as the Snap- 

 dragon {Antirrlii'mcm), a native of South Europe, and 

 the Foxglove (Digita'lis), wild in England. On the 

 other hand, species of South African Neme'sia are 

 grown in England. 



The corolla is always irregular, very often ringent, 

 or gaping widely, as of Harvey a; as well as loersonate, 

 with a closed mouth, as of the Snapdragon and 

 Lma'ria. It is sometimes rotate, i.e. flat and " wheel- 

 like," as of Veron'ica. 



The number of sta- 

 mens is usually four, of 

 which one pair has longer 

 filaments than the other 



pair. The fifth stamen is Fi<^- vs.— Zma'rta (Toad-flax). 



almost always suppressed, but would lie between the 

 posterior pair. 



The stamens are said to be didynamous {i.e. " two 

 in power"), because two are longer than the other 

 two. 



The pistil is, in this order, always composed of two 

 carpels, one behind the other, the ovary having a large 

 central, or axile, placenta bearing many ovules. 



Fig. 78 represents a flower of the Toad-flax 

 {Lina'ria), showing the ''lip" pressed against the 

 posterior petals, thus closing the '' mouth, " and making 

 the flower to \)q loersonate, i.e. '* mask-like." 



The longer stamens will be seen to arise from the 







