Monographs Details: Rhynchospora albescens (Miq.) Kük.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Cyperaceae
Discussion:

Isolepis albescens Miquel, Linnaea 19: 226. 1847. Type. Focke 1074 (U) from rivulo Corropinae, Para, Suriname.

Rhynchospora monostachya Böckeler, Allg. Bot. Zeitschr. 2: 78. 1896. Type. R. Spruce (B, K) from vicinia Santarem, Para, Brazil. Not of Steudel, 1855.

[Psilocarya monostachya R. Spruce ex Böckeler, Allg. Bot. Zeitschr. 2: 79. 1896. Invalid name published as a synonym.]

Dichromena monostachya (Böckeler) C. B. Clarke, Kew Bull. Add. Ser. 8: 32. 1908. Based on Rhynchospora monostachya Böckeler.

Type. Focke 1074 (U) from Corropin Creek, Para District, Suriname. Distribution. Endemic to northern South America; Colombia, Venezuela, the Guianas and adjoining Amazonian Basin of Brazil. COLOMBIA. Meta: Los Llanos, Haught 2580 (NY, US); La Poyata, 200 m alt, Cuatrecasas 4468 (US). VENEZUELA. Amazonas: between Esmeralda and Esmeralda Ridge, in Esmeralda Savanna, near Orinoco River, 150 m alt, Steyermark 57776 (F, NY). GUYANA. Basin of Rupuruni River, Wichabai, A. C. Smith 2288 (NY, US). SURINAME. Coropine Creek, Focke 1074 (U); Para District, Wullschlaegel 638 (U). BRAZIL. Amapá: Coastal Region, Lago Cujubim, Pires & Cavalcante 52466 (IAN, NY). Pará: Santarem, Spruce sn (K); Ilha de Marajó, Huber 177 (MG). Amazonas: Rio Branco, Serra Pellada, Ule 7669 (B, NY).

A new addition to the flora of Venezuela. This species has been known more commonly as Dichromena monostachya.