XVI VEGETABLE PHYSIOLOGY 
PAGE 
propagation—Formation of asexual reproductive cells, spores or 
gonidia; zooccenocytes—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 411-437 
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 ¥ of : . . 488-450 
INDEX : . s : . : é 5 - 451 
