Wheeler, L. C. Earlier names for several Californian vascular plants. Bulletin of the Southern California Academy of Sciences 44, 92-95 (1945).

Schumann, K. M. Flora brasiliensis 3 (3), 669-676 (1894).

von Humboldt, A. & Bondpland, A. Plantae Aequinoctiales 1, 221-224 (1808).

Bonpland, A., von Humboldt, A. & Kunth, K. S. Nova Genera et Species Plantarum 1, 244-245 (1815).