524 JOUKNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Just as conspicuous flowers have come into existence through direct 

 adaptation to insects, so self-pollination or else wind-pollination has been 

 secured in their absence. 



But each of these sorts of flowers has abundance of adaptive struc- 

 tures whereby the necessary result of plenty of seed is secured.* 



* For further details the reader may consult " Self-fertilisation," Trans. Linn. Soc. 

 1877, and The Origin of Floral Structures. 



