Monographs Details: Hypolytrum longifolium (Rich.) Nees subsp. longifolium
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
Family:Cyperaceae
Description:Distribution and Ecology - Widely distributed in central and western Guayana and the Guinanas, from Trinidad southwards to Brazilian Amazonas, absent in western Guayana, Pacific Coastal Regions and the Andes. TRINIDAD. Balandra Bay, Britton et al 429; Piarco Savanna, S of Arouea, Britton et al 103; Tunapuna, Broadway in 1890; Caroniflup, Hb. 0. Kuntze 1150. VENEZUELA. Delta Amacuro: Between La Paloma and Moron, Rio Cuyubini, alt 90 m, Steyermark 87689; Rio Amacuro, Venezuelan-British Guianan frontier, Sierra Imataca, alt 65-89 m, Steyermark 87184; Bolivar: Sierra Imataca, Rio Toro, between Rio La Reforma and Puerto Rico, N of El Palmar, alt 200-250 m, Steyermark 87849, 87864; Salto de Para, Medio Caura, alt 250 m, L. Williams 11354 (US); Rio Paragua, Guaiquinima, alt 285 m, Killip 37451; Isla El Casabe, alt 265 m, Killip 37293; Trujillo, Rio Raro, Camp 2, Perija Exploration Co., H. Pittier 10941. BRAZIL. Amazonas: Lower Rio Negro, Muirapinima, Baldwin 3368; Basin of Rio Madeira, Municipality Humayta, near Livramento, Krukoff 6762; Madeira, Porto Velho, Kuhlmann 381 (RB); Rio Negro, Martius (M, type of H. irriguum); Barra, Rio Negro, Martius iter Brasil 82 (M, type of H. fuscum); Mato Grosso: without definite locality, Moore 6354, 816; Para: Santarena, shore of Amazon, R. Spruce-712 (K).

Discussion:

Scirpus longifolius L. C. Richard, Act. Soc. Hist. Nat. Paris 1: 106. 1792.

Hypolytrum ensifolium Willd. ex Kunth, Enum. Pl. 2: 271. 1837. Invalid name in synonymy.

Scirpus comatus Hoffmannsegg ex Nees, Fl. Brasil. 2(1): 66. 1842. Invalid name in synonymy.

Hypolytrum irriguum Nees, Fl. Brasil. 2(1): 68. 1842. Syn. nov.

Hypolytrum fuscum Nees, Fl. Brasil. 2(1): 67. 1842. Syn. nov.

Type. French Guiana (n.v., reported in P).

Distribution:Guyana South America| Brazil South America| Trinidad and Tobago South America| Venezuela South America|