What you see here right off is the Calyptra, the sheath covering the Urn. Soon this will fall off, revealing something somewhat similar which is the Operculum and beneath that lies the Annulus and the Peristome, that the later of which, will open to release the spores.
Sony DSC-W5
Program mode
1/5 sec. @ f/2.8 ISO 100 EV +/-0
Meiji EMZ-13TR Stereomicroscope
Micro Lite FV 1000 fluorescent ring illumination
Moss Sporangium
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