10. Solanum umtuma Voronts. & S.Knapp, PhytoKeys 8: 4. 2012.

Distribution. Endemic to the province of KwaZulu-Natal in South Africa; occasional on grassland, scrub, and forest edges, on sandy soil, 50–1300 m elevation.

Solanum umtuma is sympatric with and closely related [38] to S. linnaeanum . Solanum linnaeanum has distinctive deeply incised leaves with rounded lobes (see Fig. 1E) while S. umtuma has more shallowly lobed leaves with acute lobes although some specimens have been seen with rounded lobes. The flowers of S. umtuma are usually pale lilac or white, while those of S. linnaeanum are purple. Solanum cerasiferum is also similar, but has less prickly calyces and deltate, rather than leafy, calyx lobes.