Gerardo Herrera 5314 Det. by: J. Gómez-Laurito, III 1994 Phenology: FR 11 March 1992 09:24N 83:05W 1000 m LIMON, TALAMANCA P.N. Cordillera de Talamanca Cordillera de Talamanca. Riparia. Espiga blanca.
William Haber 9619 Det. by: G. Davidse 1994 Phenology: FF 17 December 1989 10:18N 84:48W 1350 m PUNTARENAS, PUNTARENAS Cordillera de Tilarán. Herb, 0.50 m, open understory/edge.
William Haber 9384 Det. by: J. Gómez-Laurito, X 1993 Phenology: FL 20 August 1989 10:21N 84:41W 700-900 m ALAJUELA, SAN RAMON R.B. Monteverde Cordillera de Tilarán. Herb, marshy pasture. Inflorescence heads white.