THEIR RELATION TO PLANTS 



31 



produce three crops of fruit during the season. These 

 fruits contain male flowers, producing an abundance of 

 pollen; but this pollen is never naturally discharged 

 from the envelope containing the florets. 



Fig. p. — Blastophaga pollenizer of fig: a, female; b, c, male in two positions. 



Yet it was recognized by the fig-growers in the 

 Orient that to obtain fruit of the commercial edible 

 varieties, it was necessary to bring to them when in 

 bloom, branches containing fruit of the caprifig, which 



