849 LUTHER Bl RBAXK 



Tux SsNm OP III ncn 



It if neediest to multiply instance! of the 

 wonderful tdaptatkxui of form throii^^h which 

 the variotu ipedet ol plants have made sure that 

 the insects for which nectar is provided shall 

 cany out their part of the bargain. 



Some flowers have long tubes which only the 

 coiled proboscis of a moth or the slender hill of 

 a humming bird can fathom. These are sure 

 to provide pollen carriers of a bulky character 

 which only humming birds or Urge insecis like 

 the moth could transport. Mechanisms are even 

 provided to exclude from the nectar chamber 

 bees and other small insects that could he of no 

 service to the flower. 



But such cases, while in the aggregate numer- 

 ous, are on the whole exceptional. I n general the 

 plants with which the horticulturist deals, and par- 

 ticularly the plants of the temperate zone, have 

 oontoited themselves with a much more simple 

 arrangement, whereby the pollen bearers are so 

 arranged that any small insect that visits the 

 flower is almost sure to go away laden with pollen. 



But, in particular, provision has been made 

 by the vast majority of flowers of the orchard 

 and garden to attract a single species of insect, 

 the bee. 



