Publisher's Synopsis
Excerpt from The Morphology of the Podocarpineae: A Dissertation
Thompson (20) lays a good deal of stress on the megaspore mem brane as a primitive character. It is entirely eliminated in Taxineae, but characterizes all the members of the other family except Podo carpus itself. As the ovulate structures of the type genus are by far the most specialized of the family, this is not surprising. Miss robertson thought the megaspore membrane and spongy tissue were in some way correlated with the presence of winged pollen, but their occurrence in Saxegothaea with its wingless microspores breaks down this supposition.
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