Grewia L.
Small trees or shrubs, rarely prostrate. Genus with about 320 species of tropical distribution through Africa, Asia and Australia. In North Africa it is represented by up to 5 species of shrubby nature. This genus was traditionally included in the Tiliaceae family.
Andrews, F.W. 1950. The flowering plants of the anglo-egyptian Sudan. Vol. I (Cycadaceae – Tiliaceae). Sudan Government. By T. Buncle & Co. LTD.
Key to species
1 Cymes axillary or subaxillary or opposite to leaves 2
1 Cymes paniculate at the ends of branches, also with or without axillary cymes 4
2 Leaves ± cordate at the base, almost orbicular, usually as wide or almost as wide as long Grewia villosa
2 Leaves rounded or, at most, subcordate at the base, ovate to lanceolate, usually much longer than wide 3
3 Leaves widely ovate, acute at apex Grewia tenax
3 Leaves obovate, rounded at the apex Grewia erythraea
4 Young buds, petioles and outer surface of calyx densely covered with pilose tomentum of stellate hairs, rusty in colour Grewia ferruginea
4 Without these characters Grewia tembensis
Updated by: A.F. Carrillo.