Type : "In Guyana angl. (Schomb. 334), gallica (h. DC.) et ad Rio Negro Brasiliae (Mart.)." [protologue].
Guyana, Berbice river, rich soil along river, 11/1836-01/1837, low herbaceous, flowers yellowish white, R.H.Schomburgk I.334 (ST: BM001191444, G-DC,
K000536762, TCD0005565).
Guyane française, s.coll. (ST: G-DC).
Brésil, Amazonas, Martius (ST: ?).