BIOLOGY OF THE FLOWER 



161 



five free petals ; the stamens are numerous, but their 

 filaments are all joined to form a tube round the pistil, 

 hence called monadelphous (Gr. adelphos = brother). The 

 pistil is superior, the carpels numerous and syncarpous. 

 There are many long stigmas which, if not cross-pollinated, 

 grow, curl over among the anthers, and thus receive pollen 



Fig. 108. Modifications in the Mouth-parts and Legs of 

 Insects which collect Honey and Pollen from Flowers. 

 Po, pollen grains (after Sharp and Muller). 



from the same flower. By this means self-pollination takes 

 place. 



Flowers attractive to, and pollinated by, insects. Flowers 

 which develop bright colours, scent, or honey, attract large 

 numbers of insects, which feed on the honey and pollen ; 



1290 r 



