. The book of choice ferns for the garden, conservatory. and stove : describing and giving explicit cultural directions for the best and most striking ferns and selaginellas in cultivation. Illustrated with coloured plates amd numerous wood engravings. Identification; Ferns. Fig. 5. Ripe Antheridium (much magnified), From which Antherozoids have been shed by Opening at o.—c, Empty Central Cell; e, e, Fig. 6. immature Archegonium (much magnified). e, Canal, still Closed above, and Filled by the Canal-cell; e, e, Epidermis; n, Neck-cells ; o, Oosphere. antherozoids, which have the fa
. The book of choice ferns for the garden, conservatory. and stove : describing and giving explicit cultural directions for the best and most striking ferns and selaginellas in cultivation. Illustrated with coloured plates amd numerous wood engravings. Identification; Ferns. Fig. 5. Ripe Antheridium (much magnified), From which Antherozoids have been shed by Opening at o.—c, Empty Central Cell; e, e, Fig. 6. immature Archegonium (much magnified). e, Canal, still Closed above, and Filled by the Canal-cell; e, e, Epidermis; n, Neck-cells ; o, Oosphere. antherozoids, which have the faculty of moving rapidly in water, or in a drop of dew or rain. The " archegonia" (see Fig. 6) are the female organs, in each of which lies the "oosphere"; the latter, fertilised by the " anther ozoa," becomes the " ; This oospore develops into the Fern-plant bearing the well-known fronds, on the back of which are visible the groups (sori) of minute, brown spore-cases (sporangia), in which lie numerous spores, like the one with which the cycle began. It will thus be seen that the prothallus and the leafy Fern- plant are two generations in the course of a single cycle. The archegonia, which are developed rather later than the antheridia, are situated in the middle of the lower surface of the prothallus, behind the notch already mentioned (see Fig. 2), and in the vicinity of the antheridia. Each of the archegonia, which are by no means so plentiful as the male organs - most. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Schneider, George. London : L. U. Gill
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Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectferns, bookyear1892
