In this picture I isolated one of the capsules of Polytrichum piliferum (Bristly Haircap - Ruig haarmos) from yesterdays picture. You can see the whitisch, hairy calyptra and this way it is not diffucult to guess the reason why this moss-species is called "Haircap" (Haarmos)...
The rough conditions in which this plant lives (open landscape, sandy plains, etc.) makes it very volnurable to wind and rain. The calyptra is like a protective hat around the plants most prescious part: the capsule (containing the spores). When the capsule is ripening, the calyptera is teared open, ready to fall off and so making the capsule free to release the spores.
Kalmthout (Be) - 18/03/2010
© Johan Dierckx
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