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Definitions for
"Macrosporangium"
Keywords:
conceptacle
,
marsilia
,
selaginella
,
isoctes
,
microsporangium
A sporangium or conceptacle containing only large spores; -- opposed to microsporangium. Both are found in the genera Selaginella, Isoctes, and Marsilia, plants remotely allied to ferns.
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a plant structure that produces megaspores
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