THALAMIFLOR.E 123 



stigma and lead to cross-pollination. If insects are 

 excluded, as in wet weather, the flower is self- 

 pollinated as the petals close up and the crowded 

 stamens touch the stigma. 



The capsule opens by 3-5 valves, and when ripe 

 the seeds are blown out or fall to the ground. The 

 seed-coat is mucilaginous, and this makes the seed 

 adhere to the earth, and helps to affix it. 



The following names pass muster in different parts 

 of the country : Rock Rose, Sol-flower, Sun Daisy, 

 Sunflower, Sun Rose. 



Helianthemum vulgare. — The Rockrose is well 

 depicted in Fig. 20, which shows the undershruh habit, 

 the opposite leaves with stipules in the axils. The root-stock 

 is woody . The fugacious character of the petals is also shown, 

 and the " turn sole " nature of the flowers, which face the 

 sun, 



g. The Violet Group (Summary). 



{Introductory Volume, p. 60.) 



The order Violacese has been described in the 

 Introductory Volume, the Sweet Violet being selected 

 as a type. 



With the Violets are included the Pansies, of 

 which, like the former, many are favourites in the 

 garden. In the violets the flowers are blue or white, 

 in the latter they are usually tricolorous, or white, 

 yellow, and blue. 



Some 300 species of this order are known, dis- 

 tributed amongst fifteen genera, of cosmopolitan 



