INTROD UCTTON. 
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cells which adjoin the female organ, so that this latter becomes surrounded by 
an envelope h. A sporocarp is thus formed, the fertilised oosphere of which 
produces out of its contents after a certain period of rest a mass of tissue, all 
the cells of which produce zoospores, and each of these gives rise to a plant of 
Fig. 164.— Various forms of carpogonia, and of sporocarps resulting from them ; tv the female org-an before fertilisation ; 
m the male organ; y the entire sporocarp; h its envelope; cs the spores; W Coleochate; B Characece; C Nemalion; 
D Lejolisia; E Podosphcera ; F Ascuboliis (after various authorities). 
the same kind. The sporocarp of the Coleochsetese combines the most essential 
characters of an oospore with those of the sporocarp of the Floridese and of some 
Fungi. As respects an alternation of generations, the oosphere surrounded by its 
envelope, together with the tissue which subsequently fills it up and which produces 
