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- W2075156767 abstract "Prothallia kept for three years in the laboratory in as nearly normal conditions as possible, except for the absence of liquid water, continue to grow, but develop peculiar forms and branching of various types. The sex organs continue to develop, antheridia being found occasionally on the main plant in all positions, but especially on the branches. Archegonia become very numerous, approximately 300 having been found on one gametophyte. These not only develop in the apical region, but also far back among the old archegonia. Fertilization may take place whenever liquid water is present, as shown in several cases where gametophytes were placed in water and sectioned later. Apogamy is present in a sporangium-like structure which lacked the long stalk of the Polypodiaceae, but was not unlike the younger stages of the sporangium of the Osmundaceae. It had two layers of cells outside the fertile region, the inner of these layers resembling a tapetum." @default.
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- W2075156767 date "1910-07-01" @default.
- W2075156767 modified "2023-09-26" @default.
- W2075156767 title "Some Peculiar Fern Prothallia" @default.
- W2075156767 doi "https://doi.org/10.1086/330274" @default.
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