Macrosporangium :: Macrosporangium (n.) 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..

Macrospore :: Macrospore (n.) One of the specially large spores of certain flowerless plants, as Selaginella, etc..

Macrosporic :: Macrosporic (a.) Of or pertaining to macrospores.

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