Psychotria carronis, commonly known as the black grape, is a flowering plant in the coffee family. The specific epithet honours William Carron (1823âÂÂ1876) who collected plants on Lord Howe Island for the Royal Botanic Gardens, Sydney.
It is a small tree growing to 8 m in height. The stems exhibit prominent ring-like leaf scars. The dark glossy green, oblong-oblanceolate leaves are 80âÂÂ160 mm long, 30âÂÂ50 mm wide. The white flowers, 6âÂÂ8 mm long, occur in cymose inflorescences from November to March. The shiny, fleshy, black fruits are 18âÂÂ20 mm long and are produced in loose clusters.
The species is endemic to AustraliaâÂÂs subtropical Lord Howe Island in the Tasman Sea. It occurs in sheltered forest, mainly at elevations of 100âÂÂ400 m, around Mounts Lidgbird and Gower at the southern end of the island.