xviii VEGETABLE PHYSIOLOGY 



PAGE 



propagation Formation of asexual reproductive cells, spores or 

 gonidia ; zoocoenocytes Development of sexual cells or gametes : 

 planogametes and conjugation ; male and female cells ; anthero- 

 zoids and oospheres Gametangia and their varieties Fertilisation 

 Alternation of generations Gametophytes and sporophytes 

 Heterospory and its consequences The seed and its formation 420-447 



CHAPTER XXVI 



REPRODUCTION (continued) 



Pollination and its mechanisms Advantages of cross-pollination 

 Dichogamy, protandry, protogyny Diclinism Heterostylism or 

 dimorphism Prepotency Self -sterility Self-pollination ; cleisto- 

 gamy Mechanism of fertilisation ; the growth of the pollen-tube 

 Hybridisation Results of fertilisation ; formation and ripening 

 of fruits and seeds Germination of the seed Apospory ; apogamy ; 

 parthenogenesis 448-460 



INDEX . 461-470 



