Grewia insularis is a species of flowering plant in the Malvaceae, or mallow family, that is endemic to Christmas Island, an Australian territory in the north-eastern Indian Ocean. Its specific epithet is the Latin for insular, referring to its island location.
Grewia insularis is a shrub or small tree. Its leaves are oblong to ovate, 40âÂÂ110 mm long. The yellow flowers are usually 1âÂÂ3 in an umbel, often with several umbels from one leaf-axil. The fruit is purple, often reduced to a subglobose drupe about 3 mm long.
Found only on Christmas Island, it occurs on the terraces on the northern coast.
The fruit and flowers of G. insularis are similar to those of G. glabra, while the shape of its leaves closely resemble those of G. eriocarpa.