R. gunnii is endemic to Tasmania. R. laetevirens and R. valdiviensis are from southern Chile and Argentina, the latter being restricted to the Valdivian temperate rain forest.
R. gunnii is confined to Tasmania. Conversely, R. laetevirens and R. valdiviensis are found in southern Chile and Argentina, with R. valdiviensis restricted to the Valdivian temperate rain forest.