TL;DR: A second Tasmanian species of Micrantheum, M. serpentinum, is described from western Tasmania, and is apparently confined to three small outcrops of serpentine rock.
Abstract: A second Tasmanian species of Micrantheum, M. serpentinum, is described from western Tasmania. The new taxon is
apparently confined to three small outcrops of serpentine rock. It is closely allied to the more widespread M. hexandrum, and
both species are fully described and illustrated. A key is provided to all four species in the genus.