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NZ Plants

Gymnostomum calcareum

Family: Pottiaceae

Gymnostomum calcareum is a tiny moss that forms compact cushions 10-100 mm in diameter. The stems are up to 4 mm in height with leaves up to 1 mm long and 5-7 times as long as wide. Leaves are spreading to recurved when moist but more appressed and slightly twisted when dry. Leaf margins are smooth and leaf tips vary from blunt to acute even on the same shoot.  As suggested by the genus name, (literally, ‘naked mouth’), there is no peristome.

Widespread in New Zealand on calcareous substrates such as damp sheltered walls, limestone rock and soil.