Monographs Details: Rhynchospora pilosa subsp. arenicola (Uittien) T.Koyama
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. The Guayana Highland and adjoining Guianas and Brazilian Amapá and Pará. Rather frequent in sandstone area. VENEZUELA. Amazonas: Summit of Cerro Guanay, 1800 m alt, Maguire et al 31732 (NY) & 31684 (NY), Cerro Sipapo (Paraque), South Rim and East Rim, 6000-6500 ft alt, Maguire & Politi 28643 (NY), Cerro Yaví, depression on the summit, 2200 m alt, Phelps & Hitchcock 39 (NY); Bolívar: Ptarí-tepuí, plateau portion of SE-facing slope at 1600 m alt, Steyermark 59668 (F, NY), vicinity of Uriman, large savanna, Steyermark 75236 & 75236-A (F, NY), Auyan-tepuí, summit of the northern part of the southern section, from Río Churún to the Second Wall, 1660 m alt, Steyermark 93756 (NY, VEN), Uaipán-tepuí, savanna on western slope, 1400 m alt, Phelps & Hitchcock 321 (NY) Uaipán-tepuí, plateau between Rios Hacha and Pulpul, at southern foot of peak of Uaipán, 1200 m alt, Koyama & Agostini 7345 (NY, VEN), NE of Luepa, vicinity of road campamento at km 150, in valley of Río Urama, below Urama-tepuí, 1220 m alt, Steyermark & Nilsson 543 & 545 (NY, VEN), Sierra de Lema, Sabana de Triana, Río Chicanán, 50 km to SE of El Dorado, 300 m alt, Steyermark 89692 (NY, VEN). GUYANA. Pakaraima Mts., Samwarakna-tipú, Kamarang River—Wenamu Trail, Maguire 32541-B (NY), Kaieteur Plateau, Maguire & Fanshawe 23115 (NY), Kaieteur Savanna, 1200 ft alt Sandwith 1423 (K). SURINAME. Zanderij I., savanna, Maguire & Stahel 23720 (NY), the same locality, near aerodome, Lanjouw & Lindeman 273 (NY, U), see also type. BRAZIL. Amapá: Rio Oiapoque, airfield at 3 km NE of Oiapoque, Egler 47232 (NY); Pará: Tiriós, Rio Parú do Oeste, Fittkau & Coelho 47 (INPA, NY).

Discussion:

Rhynchospora arenicola Uittien, Rec. Trav. Bot. NĂ©erl. 22: 335. 1925.

Type. Suriname, Zanderij I, in savanna, Essed 87 (K, NY, U).

Distribution:Guyana South America| Brazil South America| Venezuela South America| Suriname South America|