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Spore capsule
	- Large (72 Kb) - Scroll down to information With labels Legend: 1 spore capsule 3 operculum 4 calyptra 2 peristome
English name: Undulate atrichum moss Scientific name: Atrichum undulata Familia: Polytrichaceae Classis: Bryopsida (= Musci) Phylum: Bryophyta Regnum: Plantae
The spores in the spore capsule of a moss are haploid. As a result of desiccation of the peristome the capsule shears and the operculum opens, allowing the spores to spread around. The calyptra is a remnant of the (haploid) gametophyt