Notes
Beside the subspecies described at least two forms (one in Melawi, one in S. Central Kalimantan) exist in Indonesian Borneo, for which more complete material is required. See also under the next species, S. ferruginea.
Citation
Brandis 1895 – In: J. Linn. Soc. Bot. p 90
Brandis & Gilg 1895 – In: E. & P., Pfl. Fam., ed. 1, 3. p 267
