Text-book of botany, morphological and physiological . Fig. 162.—Development of the swarni-spores ofCEdogonium (after Pringsheim). A, B their originfrom an older filament; C free swarm-spore inmotion; D commencement of its germination;E a swarm-spore formed out of the entire con-tents of a germinating plant (X350). Fig. 163.—^ CEdogonittm ciliatum (X2S0) middle part of a sexual filamentwith an antheridium (m) at the upper end, and two fertilised oogonia (og) bythe dwarf male plant ?«; R oogonium at the moment of fertilisation; o theoosphere, z the spermatozoid in the act of forcing its way in,

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Text-book of botany, morphological and physiological . Fig. 162.—Development of the swarni-spores ofCEdogonium (after Pringsheim). A, B their originfrom an older filament; C free swarm-spore inmotion; D commencement of its germination;E a swarm-spore formed out of the entire con-tents of a germinating plant (X350). Fig. 163.—^ CEdogonittm ciliatum (X2S0) middle part of a sexual filamentwith an antheridium (m) at the upper end, and two fertilised oogonia (og) bythe dwarf male plant ?«; R oogonium at the moment of fertilisation; o theoosphere, z the spermatozoid in the act of forcing its way in, m dwarf maleplant; C ripe oospore; D piece of the male filament of O. ge7nell2pcirzini,z spermatozoids. E branch of a hybernated plant oiBidbochate intertnedia,with one oogonium still containing a spore, another in the act of allowing itto escape; in the lower part an empty oogonium. F the four swarm-sporesresulting from an oospore; G swarm-spores from an oospore come to rest(after Pringsheim). Oogofiium is always developed from the upper daugh

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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1875