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Gnaphalium americanum Mill.
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D'Arcy, W. G. 1987. Flora of Panama. Checklist and Index. Part 1: The introduction and checklist. Monogr. Syst. Bot. Missouri Bot. Gard. 17: v–xxx, 1–328.
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Nash, D. L. 1976. Tribe IV, Inuleae. En: Nash, D.L. & Williams, L.O. (eds.), Flora of Guatemala - Part XII. Fieldiana, Bot. 24(12): 164–181, 496–502.
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Gnaphalium purpureum L.
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Wiggins, I. L. & D. M. Porter. 1971. Fl. Galápagos Isl. 1–998. Stanford University Press, Stanford.
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