5 



Htterotristylous: Some plants having a long style 

 and stamens of l)oth short and of medium length in the same 

 flower; a second kind havin?» long stamens and stamens of 

 medium length and a short style; a third plant has short 

 and long stamens and a pistil of medium length correspond- 

 ing to those of medium length stamens, as in oxalis, 

 lythrum, etc. 



AuTAKiGYNous. Self Sterile plants. The pollen of a 

 flower or of a plant will not fertilize the ovule of that plant. 

 Cases numerous, clover, calamus, etc. 

 Self Fertilization Cleistogamous. Flowers do not open 



as in the flowers of some Violets, Dead 

 la Plants. 



Nettle and some grasses. 



Vu ..i ^ xi o ■ s Delpino has made two divis- 



X Methods of Bringltig ^ 



Fertilizing Bodies Together. 



(1.) ZooGAMous, in which 



fertilizing bodies move of their own accord. In lower 

 plants, algae, some fungi, etc. 



I. DiAMESOGAMous, in which movement is brought 

 about by some foreign agent. We are concerned here with 

 those of our second division. The agents may be arranged 

 as follows: 



1. Hydeophii.ous. Pollination is brought about by 

 the water. 



2. Anemophilous. Wind is the agent. 



3. ZoiDioPHiLous. Pollination is brought about by 

 animals. 



a. Ornithophilous. Pdlination is brought about by 

 birds that look for insects or nectar. 



b. Entomophilous. Pollination brought about by 

 insects. 



1 . Melittophilous. large bees. 



