Monographs Details: Rhynchospora tenuis subsp. riparia (Nees) 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. COLOMBIA. Tolima: W of San Lorenzo, 600-800 m alt, Pennell 3537 (NY). VENEZUELA. Amazonas: vicinity of Sanariapo, near Río Sanariapo, tributary of Orinoco River, 100 m alt, Steyermark 58484 (F, NY); Bolívar: Ciudad Bolívar and vicinity, on Río Orinoco, Bailey & Bailey 1680 (NY), between Ciudad Bolívar and Río Caroní, 100 m alt, Steyermark 57568 & 57597 (F, NY, VEN), between Ciudad Bolívar and El Cristo, between Río Pao and Santa Rosalía, 100-300 m alt, Killip 37225 & 37226 (NY, US). GUYANA. Kaieteur Savanna, Sandwith 1419 (K, NY), Kaieteur Plateau, Maguire & Fanshawe 23163 & 23307 (NY), Basin of Rupuruni River, near mouth of Charwair Creek, A. C. Smith 2337 (NY), creek 2 miles S of Araquoi, Cook 93 (K, NY), 20 miles S of Lethen on road to Wichaki, Cook 222A (K, NY), Mazaruni Station, edge of swamp near river Mazaruni, 50 ft alt, Tutin 90 (BM, NY), Upper Mazaruni River, Kamakusa, De La Cruz 4250 (NY), Atkinson, St. Cuthbert’s Trail, 4.5 miles from Highway, U. G. Bio. 106 (BRG, K, NY). SURINAME, [without details,] Schweinitz (NY), Zanderij I, Airfield, Stahel 144 (NY), Zanderij I, Essed 95 (NY, U), Zanderij II, Maguire & Stahel 23670 & 25030 (NY, U), Zanderij, Bailey 163 (NY), Florschutz 808 (NY, U), Savanna No. II, Maguire 24251a (NY), Great Sapande, Lanjouw & Lindeman H-44 (NY, U), Joden savanna, Lanjouw & Lindeman 2989 (NY, U). FRENCH GUIANA. Vicinity of Cayenne, Broadway 341 (GH, NY, US). BRAZIL. Pará: 4 km S of Vigia, Drouet 2104 (GH, MO, NY); Ceará: Municipio de Fortaleza, Barra da Ceará, Drouet 2516 (GH, MO, NY).

Discussion:

[Haloschoenus sabulosus Nees, Linnaea 9: 296. 1834. Nomen nudum.]

Haloschoenus riparius Nees, Fl. Brazil. 2(1): 120. 1842. Type. Pohl 2637 (W) from Guiana.

[Haloschoenus capillaris Nees var descendens Nees, Fl. Brasil. 2(1): 212. 1842. Type. Martius 3366 (M) from “campis udis ad Viliam da Jacobina nova, prov. Bahiensis,” Brazil. Invalid name.]

Dichromena riparia (Nees) Steudel, Syn. Pl Glumac. 2: 136. 1855. Based on Halochoenus riparius Nees.

Dichromena canaliculata Steudel, Syn. Pl Glumac. 2: 136. 1855. Salzmann from Bahia, Brazil.

[Schoenus maritimus Salzmann ex Steudel, Syn. Pl Glumac. 2: 136. 1855. Invalid name published as a synonym.]

Rhynchospora riparia (Nees) Böckeler, Linnaea 37: 561. 1873. Based on Haloschoenus riparius Nees.

Rhynchospora tenuis Link var maritima Böckeler, Linnaea 37: 612. 1873. Type. Salzmann from Brazil. New status for Dichromena canaliculata Steudel.

Rhynchospora tenuis Link var descendens Kükenthal, Bot. Jahrb. 75: 190. 1950. Type. Martius (M) from Villa da Jacobina nova, Bahia, Brazil.

Distribution:Colombia South America| Venezuela South America| Guyana South America| Suriname South America| French Guiana South America| Brazil South America|