THE DICOTYLEDOXES 1625 



the anthers, while in older flowers this same region touches the spreading 

 stigmas which now project among the stamens. Should insect pollination 



Fig. 1 48 1. — Aqiiilegia vulgaris. Flower in section 

 showing the petaloid nectary spurs. 



fail, the styles grow downwards into the middle of the stamens and ulti- 

 mately reach a lower level than the anthers. 



In Delphinium elatum (Fig. 1482) the flowers are protandrous, nectar 

 being secreted at the base of one or of both spurs belonging to the two 



Fig. 1482. — Delphinium elatum. Flower in section 

 showing empty anthers directed downwards. 



upper petals. It can only be reached by the long proboscis of the humble 

 bee. The sepals serve to attract the insect. There are several bundles of 



