Vanessa Ramírez 81 Det. by: G. Davidse, 1994 Phenology: FR 13 January 1991 08:45N 83:22W 20 m PUNTARENAS, OSA R.F. Golfo Dulce Península de Osa. Hierba. Creciendo en la orilla de la carretera.
Michael Grayum 10514 Det. by: M. Grayum, IV 1993 Phenology: FL 5 April 1993 09:47N 84:32W 130-175 m SAN JOSE, TURRUBARES R.B. Carara Valle del Tárcoles. Rare weed on gravel bar along river. Spikelets green.
Michael Grayum 8516 Det. by: G. Davidse, 1988 Phenology: FL 11 December 1987 09:57N 84:02W 1310 m SAN JOSE, MONTES DE OCA Valle Central. Erect, solitary weed in garden near apartment building. Minor prop roots at base of stem. Hairs glochid-like, irritating.