† pollen-sporangiumn.BotanyObsoleterare an antheridium or microsporangium of a clubmoss.
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1861 R. BentleyMan. Bot.i. v. 375 The antheridia or pollen-sporangia are somewhat reniform, two-valved cases..containing a large number of small spores (microspores), in which spermatozoids are ultimately produced.