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Heterosporous


heterosporous -- Producing two different sizes or kinds of spores. These may come from the same or different sporangia, and may produce similar or different gametophytes. Contrast with homosporous, and compare with heterosporangiate.
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heterosporous Producing two distinct types of spores.
heterotherm An animal whose body temperature fluctuates markedly; "cold-blooded." ...
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heterosporous
The formation of more than one sort of spore, usually microspores and megaspores in ferns and seed plants, giving rise to distinct male and female gametophyte generations.
Covered in Lab 8 Seed Plant Reproduction ...
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[heterosporous ferns]
Order: Marsileales (Hydropteridales) (the water-clovers, mosquito fern, water-spangle)
Subclass: Cyatheatae ...
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Lepidodendron was a heterosporous tree common in coal swamps. As with many large plant fossils, one rarely if ever finds the entire tree preserved intact.
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Fossil from the Devonian period reveal fernlike plants that were heterosporous; that is, produced two kinds of spores.
microspores (male) and
megaspores (female).
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