) a 
ECOLOGY OF FLOWERS BYE | 
case the closed flowers are much less conspicuous than 
the others, yet they produce much seed. Every one 
knows the ordinary flowers of the violet, but most people 
Fia. 262.— Protection of Pollen from Moisture. 
At the left herb Robert and sweet scabious in sunny weather ; at the right 
the same flowers during rain. 
do not know that violets very generally, after the blos- 
soming season (of their showy flowers) is over, produce 
many cleistogamous flowers, as shown in Fig. 261. 
