Category:Macrosporangium

Mac`ro*spo*ran"gi*um, n. Etym: [NL. See Macro-, and Sporangium.] (Bot.)

Defn: 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.