Anales del Jardín Botánico de Madrid ISSN: 0211-1322 [email protected] Consejo Superior de Investigaciones Científicas España Parmentier, Ingrid; Geerinck, Daniel Check list of the Melastomataceae of Equatorial Guinea Anales del Jardín Botánico de Madrid, vol. 60, núm. 2, 2003, pp. 331-346 Consejo Superior de Investigaciones Científicas Madrid, España Available in: http://www.redalyc.org/articulo.oa?id=55660204 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative CHECK LIST OF THE MELASTOMATACEAE OF EQUATORIAL GUINEA by INGRID PARMENTIER & DANIEL GEERINCK Laboratoire de Botanique Systématique et de Phytosociologie. CP169, Université Libre de Bruxelles, 50 av. F.D. Roosevelt, 1050 Brussels <[email protected]> Resumen PARMENTIER, I. & D. GEERINCK (2003). Catálogo de Melastomataceae de Guinea Ecuatorial. Anales Jard. Bot. Madrid 60(2): 331-346 (en inglés). Se presenta el catálogo florístico de la familia Melastomataceae en Guinea Ecuatorial. Se re- cogen un total de 57 táxones. Tres especies fueron aceptadas teniendo en cuenta solamente la literatura. Su distribución sugiere que su presencia en Guinea Ecuatorial es muy probable. En Annobón están presentes 6 especies, 23 en Bioko y 49 en Río Muni. Los géneros mejor repre- sentados son Memecylon (10 especies), Calvoa (10) y Tristemma (7).Veintiséis táxones son ci- tados por primera vez en Guinea Ecuatorial. Se propone Heterotis obamae Lejoly & Lisowski como sinónimo de Heterotis arenaria Jacq.-Fél. Palabras clave: Guinea Ecuatorial, Melastomataceae, Heterotis obamae, Heterotis arenaria, check list, Annobón, Río Muni, Bioko. Abstract PARMENTIER, I. & D. GEERINCK (2003). Check list of the Melastomataceae of Equatorial Gui- nea. Anales Jard. Bot. Madrid 60(2): 331-346. A chec klist of the Melastomataceae of Equatorial Guinea is presented with 57 taxa. Three species were accepted based only on literature records, their distribution area strongly suggests their presence in Equatorial Guinea. Six species are known from Annobón, 23 from Bioko and 49 from Río Muni. Best-represented genera are Memecylon (10), Calvoa (10) and Tristemma (7). Twenty-six taxa are newly recorded for the country. Heterotis obamae Lejoly & Lisowski is set in synonymy with the previously described Heterotis arenaria Jacq.-Fél. Key words: Equatorial Guinea, Melastomataceae, Heterotis obamae, Heterotis arenaria, check list, Annobón, Río Muni, Bioko. INTRODUCTION Corisco are small islands near the border of Río Muni with Gabon. Pico Basile, on Bioko Equatorial Guinea is located in Western Island, is the highest peak (altitude: 3011 m) Central Africa (fig. 1). The country includes and occupies half of the island, the other half two main islands in the Gulf of Guinea: Bioko being occupied by two other volcanoes: La (2017 km²), 32 km from the coast of caldera de Luba (2261 m) and Pico Biaó Cameroon, and Annobón (17 km²), 400 km (2009 m) (PÉREZ DEL VAL, 1996). Malabo, from Gabon. The continental mainland, Río north of the island, has a drier season from Muni (26000 km²) is located between 1º and December to January and annual precipitation 2º30’ N and 9°30’ and 11°30’ E. Elobey and of 1932 mm per year. Pluviometry is more 332 ANALES JARDÍN BOTÁNICO DE MADRID, 60(2) 2003 important in the southern part of the island, titude (PÉREZ DEL VAL, 1996). From West to with up to 10150 mm annual rainfall at Ureca. East, Río Muni is divided into three mains The temperature oscillates around 26 °C at parts. The coastal zone includes a littoral sea level. There are strong variations in pre- sandy plain about 30 km wide followed by cipitation, temperature and humidity with al- small hills about 200 m high. The Niefang Fig. 1.–Equatorial Guinea in Africa, provinces, and localities of Melastomataceae collections. CHECK LIST MELASTOMATACEAE EQUATORIAL GUINEA 333 Mountain Range reaching 1200 m crosses Río on the works of Jacques-Félix, especially in Muni. The eastern part of the country is a vast the flora of Melastomataceae of Gabon plateau of 600 to 700 m altitude scattered with (JACQUES-FÉLIX, 1983a) and Cameroon inselbergs. Climate in Río Muni is equatorial (JACQUES-FÉLIX, 1983b) completed by more with two drier seasons: from July to Septem- recent works (BORHIDI, 1993; JACQUES-FÉLIX, ber and from December to February. Mean 1987; J. LEJOLY & S. LISOWSKI, 1999c; precipitation 2500 mm/year, temperature is FIGUEIREDO, 2001). Bibliographic records around 26 °C all year. from Melastomataceae in Equatorial Guinea Melastomataceae collections from Equato- were obtained mainly from AEDO & al. rial Guinea in the last twenty years were (1999), completed by recent publications like mainly collected by the Real Jardín Botánico those of LEJOLY & LISOWSKI (1999a,b,c), of Madrid and the Laboratoire de Botanique PARMENTIER & NGUEMA (2001), PARMENTIER systématique et de Phytosociologie of the & al. (2001), PARMENTIER (2002). Doubtful Université Libre de Bruxelles. A good review records and insufficiently known species are of the botanical work in Equatorial Guinea given at the end of the check list. The locality is given in VELAYOS & AEDO (2001). Most names used in this check list have been recent collections from Río Muni in BRLU brought up-to-date and made uniform were collected by Senterre for his study of (table 1), localities are mapped in figure 1. the forest of the Parque Nacional de Monte Those localities are in agreement with those Alén and the Parque Nacional de Nsork (SEN- cited in the check list of the Pteridophytes of TERRE & NGUEMA, 2001; SENTERRE, 2001) Equatorial Guinea (VELAYOS & al., 2001). and by Parmentier, with her studies on the in- The check list is alphabetically ordered by selberg vegetation (PARMENTIER & al., 2001; species within genera. Under each accepted PARMENTIER & NGUEMA, 2001; PARMENTIER, taxon, the accepted synonyms used in the lit- 2002). erature of Equatorial Guinea are included Early general studies giving information (JACQUES-FÉLIX, 1974b; LEBRUN & STORK, on Melastomataceae of West tropical Africa 1991, 1995, 1997; FIGUEIREDO, 2001). Speci- come from HUTCHINSON (1928), GUINEA mens are alphabetically arranged within (1946, 1951) and HUTCHINSON & DALZIEL province, locality and collector. The herbaria (1954). The major work of Jacques-Félix, is where they are deposited are mentioned. our main reference for this paper, especially Herbarium codes for MA specimens are giv- his flora of Melastomataceae from Cameroon en. The indice “st” means that a specimen is (JACQUES-FÉLIX, 1983a) and Gabon (JACQUES- sterile. Previous bibliographical records for FÉLIX, 1983b). It was usefully completed by a each taxon are listed. When the taxon was recent revision of Calvoa (FIGUEIREDO, 2001). recorded under an accepted synonym it is in- Recent works notifying the occurrence of dicated (i.e. LEJOLY, 1999b: 118, sub Dissotis Melastomataceae species on Bioko are those irvingiana). of MORALES (1994, 1995) and FERNÁNDEZ New signalisations for the country are indi- CASAS & MORALES VALVERDE (1995). cated by a “*” before the taxon name. MATERIALS AND METHODS THE CHECK LIST The check list is mainly based on the ex- 1. Amphiblemma mildbraedii Gilg ex Engl. amination of about 600 Melastomataceae BIOKO SUR: Moca, Fernández Casas 11486 (MA herbarium specimens from BATA (Herbario 555825), Guinea 1968 (MA 268681). Moca-Riaba, por el Nacional de Guinea Ecuatorial), BRLU camino viejo, Fernández Casas 11846 (MA 555826). (Herbarium de l’Université Libre de Bruxel- Malabo-Moca, km 65-66, Carvalho 3767 (MA 568051); ibidem, km 67, Carvalho 2484 (MA 558405); ibidem, les) and MA (Herbario del Real Jardín Botá- km 70, Carvalho 2617 (555824). Musola, Guinea 1723 nico de Madrid). Determinations were based (MA 384342), 1724 (MA 384344). 334 ANALES JARDÍN BOTÁNICO DE MADRID, 60(2) 2003 TABLE 1 LOCALITIES OF MELASTOMATACEAE COLLECTIONS IN EQUATORIAL GUINEA WITH GEOGRAPHICAL COORDINATES Acasakira, rocher (Wele-Nzas) 1º7’N-11º15’E Moca (Bioko Sur) 3º20’N-8º40’E Acurenam (Centro-Sur) 1º7’N-10º40’E Mongola (Wele-Nzas) 1º46’N-10º41’E Akoak Ebanga, inselberg 1º4’N-11º12’E Monte Alén (Centro-Sur) 1º37’N-10º19’E (Wele-Nzas) Monte Mitra (Centro-Sur) 1º21’N-9º75’E Akuom, inselberg (Wele-Nzas) 1º49’N-10º55’E Mungum, inselberg (Wele-Nzas) 1º19’N-10º49’E Andom, inselberg (Wele-Nzas) 1º27’N-11º2’E Musola (Bioko Sur) 3º26’N-8º37’E Añisok (Wele-Nzas) 1º51’N-10º46’E Ncoho (Litoral) 1º14’N-9º54’E Arenas Blancas, playa 3º32’N-8º35’E Ngoma (Litoral) 1º14’N-9º29’E (Bioko Sur) Ngong Mocomo (Wele-Nzas) 1º4’N-11º11’E Asoc, inselberg (Wele-Nzas) 1º27’N-11º20’E Niefang (Centro-Sur) 1º50’N-10º14’E Ayamiken (Litoral) 2º7’N-10º2’E Nsum Esangüi (Wele-Nzas) 1º42’N-11º15’E Ayene (Wele-Nzas) 1º55’N-10º38’E Obamico (Parque N. de Nsork) 1º14’N-11º2’E Bahía de Venus (Bioko Norte) 3º46’N-8º44’E Oyac Esom (Centro-Sur) 1º53’N-10º50’E Baríobe (Bioko Norte) 3º35’N-8º52’E Palé (Annobon) 1º24’N-5º38’E Belebú Balachá de Riaba 3º24’N-8º34’E Parque Nacional de Monte Alén, 1º62’N-10º8’E (Bioko Sur) 2 km au NE du site de traversée Biaó, lago (Bioko Sur) 3º21’N-8º38’E du Río pour aller aux cataractas Bicaba (Centro-Sur) 1º48’N-10º16’E (Centro-Sur) Bicurga, inselberg (Centro-Sur) 1º35’N-10º28’E Parque Nacional de Monte Alén, 1º45’N-10º15’E Bolondo (Litoral) 1º37’N-9º38’E 2 km au NO du transect de Monte Bome (Litoral) 1º49’N-9º43’E Chocolate (Centro-Sur) Campo, desembocadura del