Trochetiopsis melanoxylon

Trochetiopsis melanoxylon (Dwarf Ebony) was a species of flowering plant in the Malvaceae family before its extinction. It was native to Saint Helena.

The species was closely related to Trochetiopsis ebenus (Saint Helena ebony), but differed in a few ways. It had much smaller flowers, hairless sepals on their interior surfaces, and leaves that were densly hairy on both surfaces (the Saint Helena ebony is only hairy on the lower surfaces of the leaves).

It was last seen when it was collected by Joseph Banks and Daniel Solander on James Cook's first voyage. It may have once covered the driest slopes of Saint Helena, but appears to have been one of the first casualties of the goat by Portuguese sailors soon after the island's discovery in 1502.