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Because of their ability to disperse by spores and their capacity to produce both
sex organs on the same gametophyte and to self-fertilize, it would seem logical to
assume that the ferns possess higher powers of long-distance dispersal and ...
Vegetative propagation of some photosynthetic fern gametophytes is
accomplished by continued growth and ... to form the embryo, which remains
encapsulated in the gametophyte until it breaks out and becomes an
Genetically, homosporous ferns differ from heterosporous pteridophytes and from
seed plants in their ability for intragametophytic selfing—fertilization of an egg by
a sperm produced in the same gametophyte. One gametophyte may have both ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review