Michael Grayum 8517 Det. by: M. Grayum, XII 1987 Phenology: FL 11 December 1987 09:57N 84:02W 1310 m SAN JOSE, MONTES DE OCA Valle Central. Weed in garden near apartment building, the culms diverging from a common point.
Alvaro Fernández 74 Det. by: G. Davidse, 1994 Phenology: FR 29 September 1990 10:14N 84:03W 150 m HEREDIA, SARAPIQUI P.N. Braulio Carrillo Llanura de San Carlos. Pasto. Espigas verdes. Nombre común: "zacate amargo".
William Haber 9634 Det. by: G. Davidse, 1992 Phenology: FF 18 December 1989 10:16N 84:50W 900 m PUNTARENAS, PUNTARENAS Cordillera de Tilarán. Herb, 0.5-1.0 m tall, roadside next to spring seepage.
William Haber 9640 Det. by: G. Davidse, 1992 Phenology: FL 18 December 1989 10:16N 84:50W 900 m PUNTARENAS, PUNTARENAS Cordillera de Tilarán. Herb, clumps on stream bank, 0.6-0.8 m.