Monographs Details: Rhynchospora micrantha Vahl
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. Discontinuously distributed in northern Africa (Upper Guinea and Teneriffa) and tropical America from Mexico and West Indies through Colombia, Venezuela, and the Guianas southwards to Ecuador and to Brazil. The following specimens have been examined from South America. COLOMBIA. Santa Maria, H. H. Smith 2197 (NY). ECUADOR. Los Rios: Hacienda Clementina on Rio Pita, Asplund 5481 (NY, S); Guayas: Milagro, Asplund 5768 (NY, S). VENEZUELA. Falcon: Cerro Santa Ana, ascent from south side from the village of Santa Ana, 200-300 m alt, Steyermark & Braun 94583 (NY, VEN); Guárico: between Los Camino and Calabozo, Fernandez 643 (MAR). BRAZIL. Is. Fernando de Noronha, Ridley et al in 1887 (BM, NY); Piauí: Piauhy, Martius (M); Ceará: Parahyba, Luetzelburg 23670, 23685, 26601 & 27097 (M), Crat(h)eús, Swallen 4495 (US), Cedro, Luetzelburg 23705 (M); Maranhão: Rio de Coqueiros, Luetzelburg 26219A (M); Pernambuco: Tapera, Pickel 2614 (NY, US); Bahia: Taboleiros, Luetzelburg 26223 (M); São Paulo: Campinas, Novaes 1308 & 1317 (n v, fide Kükenthal).

Discussion:

In part, concerning West sn from Puerto Rico, as emended by Kunth, Enum. Pl. 2: 279. 183 7. Type. West (C) from Puerto Rico.

Juncus parviflorus Poiret in Lmarck, Encycl. Meth. Bot. Suppl. 3: 160. 1813. Type. Puerto Rico, Ledru (n v, reportedly in P).

Zosterospermum gracile Desvaux in W. Hamilton, Prodr. PI. Ind. Occid. 14. 1825. Type from “India occidentali” in Hb. Desvaux, (n v)

[Scleria minutiflora Richard ex Sprengel, Syst. Veg. 3: 831. 1826. Type from “Ins. Antill.” Invalid name published as a synonym.]

[Rhynchospora sparsa Sieber ex Presl in Oken, Isis 21: 268. 1828. Not of Vahl, 1806. Type. Haenke (PR) from Mexico.]

Haloschoenus sparsus Nees, [Linnaea 9: 296. 1834. Nomen nudum], Fl. Brasil. 2(1): 123. 1842. New name based on Rhynchospora sparsa Sieber ex Presl, non Vahl.

[Haloschoenus pygmaeus Nees, Linnaea 9: 296. 1834. Name only; excluding basionym, Scleria pygmaea R. Br.]

Dichromena micrantha (Vahl) Kunth, Enum. PI. 2: 278. 1837. Based on Rhynchospora micrantha Vahl.

[Rhynchospora polyphylla Balb. ex Kunth, Enum. Pl. 2: 279. 1837. Invalid name published as a synonym.]

[Rhynchospora parviflora Vahl ex Nees, Fl. Brasil. 2(1): 123. 1842. Invalid name published as a synonym.]

Haloschoenus contractus Nees, Fl. Brasil. 2(1): 123. 1842. Type. Martius (M) from Piauhy, Brazil.

Dichromena contracta (Nees) Steudel, Syn. Pl. Glumac. 2, 136. 1855. Based on Haloschoenus contractus Nees.

Rhynchospora micrantha Vahl var contracta (Nees) Böckeler, Linnaea 37: 609. 1873. Based on Haloschoenus contractus Nees.

Type. West s n (C) from Puerto Rico.

The occurrence of this species in Venezuela has been doubtful. The two specimens cited above now make a documentation of R. micrantha for the flora of Venezuela. In Brazil, especially in coastal localities, R. micrantha may bear somewhat contracted inflorescences. This form has been described as Haloschoenus contractus Nees, but is merely an ecological condition.

Distribution:Guinea Africa| United States of America North America| Mexico North America| West Indies| Colombia South America| Venezuela South America| Guyana South America| Ecuador South America| Brazil South America|