Calomnion complanatum

Calomnion complanatum is a species of moss native to Australia and New Zealand. It is the type species of the genus Calomnion, growing on the trunks of tree ferns. It is a small, yellow-green plant rarely more than 10 mm tall.
Within New South Wales, Calomnion complanatum is an endangered species reported from only 4 populations, all in New South Wales: Cambewarra Mountain, Rocky Creek Canyon on the Newnes Plateau, and two sites on Mount [Wilson, New South Wales|Mount Wilson]. It is listed as endangered in Victoria but rare and not endangered in Tasmania or New Zealand.