154 WILD FLOWER FAMILIES 
easily see that this is true, and while you are 
looking see if you can find any hairs on the inner 
surface of the petals. Are they so situated as to 
protect the nectar at the base of the flower from 
WILD GERANIUM 
being washed away by rain? The presence of 
such hairs in the Crane’s-bill that grows in Ger- 
many first led the naturalist, Sprengel, to study 
the relations of flowers and insects—a subject to 
which, before his time, no one had given careful 
attention. 
