Garrett Crow 7550 Det. by: G. Crow, VIII 1990 Phenology: 15 August 1990 09:57N 83:49W 10 m PUNTARENAS, ESPARZA Faja Costeña de Puntarenas. Free-floating. Sparse, among Typha.
Alexande Rojas 536 Det. by: A. Rojas, X 1993 Phenology: ST 18 October 1993 10:00N 84:06W 1180 m HEREDIA, HEREDIA Valle Central. Acuática flotante.
Alexande Rojas 658 Det. by: A. Rojas, XI 1993 Phenology: ST 28 November 1993 10:00N 84:06W 1180 m HEREDIA, HEREDIA Valle Central. Acuática flotante.
Garrett Crow 7381 Det. by: G. Crow, X 1989 Phenology: 15 October 1989 10:17N 85:20W 13 m GUANACASTE, NICOYA Valle del Tempisque. Plants floating, locally abundant.