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Stomata-containing capsules showing internal circumsporangial space (arrows) that forms between the embryonic endothecium and amphithecium, extends into the neck, and is involved in hydrating and nourishing the spore sac during development. (A) LM Ephemerum. (B) SEM Plagiomnium. Image credit: Jeffrey J. Duckett. Bars: (A) = 35 μm; (B) = 50 μm.
