Michael Grayum 8154 Det. by: M. Grayum, III 1987 Phenology: FL 11 March 1987 09:32N 83:42W 2400 m SAN JOSE, PEREZ ZELEDON Cordillera de Talamanca. Abundant in open, weedy area. Spikelets at anthesis purplish.
Gerardo Rivera 457 Det. by: G. Davidse, 1994 Phenology: FL 20 August 1990 10:06N 84:06W 2100 m HEREDIA, BARVA P.N. Braulio Carrillo Cordillera Central. Planta de 0.15 m. Flores moradas.