Monographs Details: Rhynchospora cariciformis Nees
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Cyperaceae
Description:Distribution and Ecology - Distribution. Endemic to Amazonian basin from southeastern Colombia and northeastern Peru eastwards to Brazilian State of Para. Sporadically occurring on wet river bank. VENEZUELA. Amazonas: Alto Río Orinoco, Temblador, 150 m alt, Maguire & Wurdack 34613 (NY). COLOMBIA. Vaupés: Alto Vaupés, Alrededores de Miraflores, 300 m alt, Gutierrez & Schultes 523 (COL, NY), Río Pacoa, 900 ft alt, Schultes & Cabrera 15254 (COL, GH, NY, US), Río Apaporis, Raudal de Jirijirimo, below mouth of Río Kananari, 900 ft alt, Schultes & Cabrera 14924 (COL, GH, NY), Río Apaporis, Soratama, Schultes & Cabrera 16118 (COL, NY, US). PERU. Loreto: San Antonio, Alto Río Itaya, Ll. Williams 3457 (F, NY), above Iquitos, banks of Río Itaya, 110 m alt, Killip & A. C. Smith 29391 (NY, US), ca 150 m NE of Iquitos, Río Momon, Koyama 12067 (NY), Gamitanacocha, Río Mazán, 100-125 m alt, Schunke 272 (NY). BRAZIL. Amazonas: Papori, Sta. Maria, Luetzelburg 23063 (M), Rio Negro, Mt. Araracoara, Martius 3228 (M), Rio Cuieiras, Rapartimento, Rodrigues 6095 (INPA, NY), sylvis ad Pagum Miranharum, Rio Negro, Martius 3125 (M), Manaus, Rio Cuieiras, Igarape Cachoeira, Rodrigues & Coelho 4000 (INPA, NY), Manaus, Itacoatiara Highway at Km 201, banks of Rio Urubu, Prance et al 3694 (IAN, NY), Rio Madeira, Municipality of Humaitá, banks of Rio Ipixuna, Prance et al 3336 (IAN, NY); Territory of Rondonia: Basin of Rio Madeira, Rio Mutumparaná, 10 km above Mutumparaná, Prance et al 8767 (INPA, NY); Pará: forest along Rio Amazon, Martius 3229 (M), [without details,] Martius 3230 (M).

Discussion:

Rhynchospora trichophora Nees, FI. Brasil. 2(1): 145. Syntype consisting of Martius [3229] (M) from “sylvis fluvio Amazonum inhorrescentibus prov. Paraensis,” and Martius [3228] (M, lectotype chosen here) from “monte Araracoara prov. fluminis Nigri,” Amazonas, Brazil. Syn. nov.

Dichromena cariciformis (Nees) Macbride, Publ. Field Mus. Bot. 11: 42. 1931. Based on Rhynchospora cariciformis Nees.

Rhynchospora cariciformis Nees var trichophora (Nees) Kükenthal, Bot. Jahrb. 75: 126. 1950. Based on Rhynchospora trichophora Nees.

Type. Martius 3125 (M) from “sylvis as pagum Miranharum in ditione fluv. Japura, prov. fluminis Nigri,” Amazonas, Brazil.

Distribution:Colombia South America| Peru South America| Brazil South America| Venezuela South America|