Rhodamnia is a genus of rainforest trees and shrubs belonging to the myrtle family (Myrtaceae), placed in the order Myrtales. The genus was formally described in 1822 and comprises roughly two dozen species distributed across the Asia-Pacific region.
Members of the genus are characterised by opposite leaves that are mostly three-veined from the base — a trait that readily distinguishes them from related Myrtaceae genera — along with small white flowers and small berries containing a few seeds. The bowl-shaped calyx tube is a morphologically distinctive feature that gave the genus its name.
Species range from small rainforest shrubs to medium-sized canopy trees and are found in humid tropical and subtropical forest habitats from southern China and mainland Southeast Asia through Malesia (including Papua New Guinea and associated islands) to eastern Australia and New Caledonia.
Etymology
The genus name Rhodamnia is derived from two Greek words: rhodon ("rose") and amnion (a bowl used to collect blood of sacrificial lambs), referring to the characteristic bowl-shaped calyx tubes of the flowers.
Distribution
Rhodamnia species are native to southern China, mainland Southeast Asia, Papuasia (including Papua New Guinea and surrounding islands), eastern Australia, and New Caledonia. They inhabit humid tropical and subtropical rainforests across this wide Asia-Pacific range.
