Georgius Everhardus Rumphius, Herbarium Amboinense (Amstelaedami: Chanquion, 1741-1750) vol. 1 p. 110, tab. 32; cf. E. D. Merrill, An Interpretation of Rumphius's Herbarium Amboinense. Manilae: Department of Agriculture and Natural Resources, Bureau of Science, 1917 p. 190
Eruditio recentior
F. R. Fosberg in Journal of the Washington Academy of Sciences vol. 31 (1941) p. 95