Monographs Details: Manettia alba (Aubl.) Wernham
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Rubiaceae
Description:Distribution and Ecology - Distribution. French and British Guiana, southeastern Venezuelan Guayana, and Amapá, Brazil. FRENCH GUIANA. 1864, Melinon (P); Karonany, Sagot (photo of type of M. lygistum var alba in B); photo of type of Nacibea alba Aubl. in B. BRITISH GUIANA. Groete Creek, Lower Essequibo River, 23 June 1944, Fanshawe 1989; NE side, Mt. Ayanganna, Upper Mazaruni River basin, alt 750-900 m, 18 Aug 1960, S. S. & C. L. Tillett & Boyan 45893; Aga Creek, Upper Mazaruni, 8 July 1957, Forest Dept Record No 7851; bank of the Potaro River, Tumatumari, 4-6 July 1921, Gleason 337; Kaieteur Savannah, alt 360 m, 4 Sept 1937, Sandwith 1357; Soorooroo, tributary Pomeroon River, July 1906, Beckett 8496; Kamuni Creek, Groete Creek, Essequibo River, 15 April 1944, Maguire & Fanshawe 22839; Haieka Savannah, E side Haieka River, 2 mi E of Chinowieng Village, Ayanganna Plateau, alt 740 m, 22 Aug 1960, S. S. & C. L. Tillett & Boyan 45237. VENEZUELA. Bolívar: Km 107, carretera El Dorado-Santa Elena de Uairen, alt 560 m, 13 Aug 1957, Trujillo 3537; Río Uiri-yuk, Alto Río Cuyuni, 25 Aug 1962, B. Maguire, Steyermark & C. K. Maguire 46964; entre Km 114 y 124, carretera El Dorado-La Gran Sabana, 22 Feb 1968, Bunting 3083; Km 124, carretera El Dorado-La Gran Sabana, 18 Feb 1968, Bunting 2943; Serrania del Paujil, 120 km sur de El Dorado, alt 1000 m, 26 April 1957, Bernardi 6796; Río Avacapa, afluente del Apacará, Municipio de Uriman, alt 500 m, 16 Aug 1954, Bernardi 1443; Chimantá Massif, quebrada on SW-facing portion of Chimantá-tepui (Torono-tepui), alt 1400 m, 15 May 1953, Steyermark 75400; Chimantá Massif: Torono-tepui, between Base Camp and Camp 2, alt 555-750 m, 24 Jan 1955, Steyermark & Wurdack 325; Fila de La Danta, between Campamento 125 and km 127, between Luepa and Cerro Venamo, alt 12001 m, 15-17 April 1960, Steyermark & Nilsson 226; Chimanta Massif, vicinity of Techiné-merú, alt 395 m, 16 March 1955, Steyermark & Wurdack 1436. BRAZIL. Amapá: along Rio Ingarari, 0-3 km from its confluence with Rio Oiapoque, 2°17-18'N, 52°38'W, 15 Sept 1960, Irwin, Pires & Westra 48272; along Rio Araguari, 2°13'N, 51°58'W, 3 Sept 1961, Pires, Rodrigues & Irvine 50700.

Discussion:

Nacibea alba Aubl., Pl. Guian. 1: 95. pi. 37, f. 2. 1775.

Manettia lygistum var alba K. Schum., Mart. FI. Bras. 6(6): 180. 1889.

Type. French Guiana, Aublet.

In his treatment of the genus, Schumann [Mart. Fl. Bras. 6(6): 180—181. 1889] placed this species and M. moritziana as varieties respectively under Manettia lygistum. Manettia alba can be easily separated from M. moritziana. by several characters, one of which is the very short corolla with the corolla lobes much longer than the tube. There is some variation shown in the material of M. alba, the Venezuelan specimens especially from the area of the Chimanta Massif having the hypanthium more densely pubescent, the calyx lobes more prominently ciliolate, and frequently the lower surface of the leaves more pubescent.

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