Kew Bulletin

, 74:2 | Cite as

Orchidaceae in Equatorial Guinea (West Tropical Africa): nomenclatural and taxonomic notes, new records and critical taxa

  • Roberto GamarraEmail author
  • Pablo Galán Cela
  • Emma Ortúñez


A series of notes on nomenclature and taxonomy, new records and critical taxa for the orchid flora of Equatorial Guinea is presented. Mariarisqueta divina Guinea is lectotypified and isotypes of Angraecum henriquesianum Ridl. and A. quintasii Rolfe are provided. A new subspecies in the genus Eulophia is described. The genera Phaius and Plectrelminthus are first recorded and 20 taxa reported as new for Equatorial Guinea. Habenaria clarencensis Rolfe is synonymised to H. bracteosa Hochst. ex A. Rich. Four taxa are excluded due to misidentifications, one genus and four species need to be confirmed in Equatorial Guinea.


Eulophia Mariarisqueta divina misidentification new subspecies synonyms typification 



We are indebted to the staff of the institutions associated with this study, in particular to Dr Andre Schuiteman, from the Royal Botanic Gardens, Kew, for information on the spirit collection of Solenangis conica. We also wish to thank to Sven Buerki, Joaquim Santos and Matthias Schultz for their search for type materials in the herbaria BM, COI and HBG, respectively. We are grateful to all the curators of the herbaria K, MA and WAG from where we have received very useful loans. This research was supported by the Ministry of Economy and Competitiveness of Spain through the project CGL2012-32934.


  1. Azandi, L., Stévart, T., Sonké, B., Simo-Droissart, M., Avana, M.-L. & Droissart, V. (2016). Synoptic revision of the genus Cyrtorchis Schltr. (Angraecinae, Orchidaceae) in Central Africa, with the description of a new species restricted to submontane vegetation. Phytotaxa 267: 165 – 186.Google Scholar
  2. Bolus, H. (1889). Contributions to South-African Botany. — Part IV. (With a revised list of published species of extra-tropical South-African orchids). J. Linn. Soc., Bot. 25: 156 – 210.Google Scholar
  3. Bytebier, B. (2014). In: F. Martos, S. D. Johnson, C. I. Peter & B. Bytebier, A molecular phylogeny reveals paraphyly of the large genus Eulophia (Orchidaceae): A case for the reinstatement of Orthochilus. Taxon 63(1): 9 – 23.Google Scholar
  4. Cribb, P. (1989). Flora of Tropical East Africa. Orchidaceae (part 3). A. A. Balkema, Rotterdam.Google Scholar
  5. Cribb, P. (1996). New species and records of Orchidaceae from West Africa. Kew Bull. 51: 353 – 363.Google Scholar
  6. Cribb, P. & Govaerts, R. (2005). Just how many orchids are there? In: A. Raynal-Roques, A. Roguenant & D. Prat (eds), Proceedings of the 18 th World Orchid Conference. March 11 –20, 2005. Dijon-France, pp. 161 – 172. Naturalia Publications, Turriers.Google Scholar
  7. De Castro Antolín, M. L. & De la Calle Muñoz, M. L. (1985). Geografía de Guinea Ecuatorial. Ministerio de Educación y Ciencia, Madrid.Google Scholar
  8. Droissart, V., Sonké, B., Simo, M. & Stévart, T. (2009). New orchid records from Atlantic Central Africa. Edinburgh J. Bot. 66: 1 – 18.Google Scholar
  9. Droissart, V., Sonké, B. & Stévart, T. (2006). Les Orchidaceae endémiques d’Afrique centrale atlantique présentes au Cameroun. Syst. Geogr. Pl. 76: 3 – 84.Google Scholar
  10. Exell, A. W. (1959). Additions to the flora of S. Tomé and Principe Bull. Inst. Fondam. Afrique Noire, Sér. A, Sci. Nat. 21: 439 – 476.Google Scholar
  11. Fa, J. E. (1991). Conservación de los ecosistemas forestales de Guinea Ecuatorial. UICN, Cambridge.Google Scholar
  12. Galán Cela, P., Gamarra, R. & Ortúñez, E. (2018). Catálogo de la familia Orchidaceae en Guinea Ecuatorial. Collect. Bot. (Barcelona) 37: e003. 10.3989/collectbot.2018.v37.003Google Scholar
  13. Geerinck, D. (1992). Orchidaceae (seconde partie). In: P. Bamps (ed.), Flore d’Afrique centrale (Zaïre, Rwanda, Burundi). Spermatophyte, pp. 297 – 780. Jardin Botanique National de Belgique, Meise.Google Scholar
  14. Govaerts, R. et al. (2017). World Checklist of Orchidaceae. Royal Botanic Gardens, Kew. Available from (accessed: 24 November 2017)
  15. Guinea, E. (1946a). Novedades sistemáticas de mi primer viaje a la Guinea continental española (verano de 1945). Anales Jard. Bot. Madrid 6: 463 – 485.Google Scholar
  16. Guinea, E. (1946b). Ensayo geobotánico de la Guinea continental española. Dirección General de Marruecos y colonias, Madrid.Google Scholar
  17. Hall, J. B. (1974). African Orchids: XXXIV. Kew Bull. 29: 427 – 429.Google Scholar
  18. IUCN (2017). Guidelines for Using the IUCN Red List Categories and Criteria. Version 13. International Union for the Conservation of Nature, Gland. Available from (accessed: 20 February 2018)
  19. Jonsson, L. (1979). New combinations in the African genera Chauliodon and Solenangis (Orchidaceae). Bot. Not. 132: 381 – 384.Google Scholar
  20. Kraenzlin, F. W. L. (1909). Orchidaceae Africanae X. Bot. Jahrb. Syst. 43: 393 – 399.Google Scholar
  21. Kraenzlin, F. W. L. & Schlechter, R. (1906). In: R. Schlechter, Orchidaceae Africanae IV. Bot. Jahrb. Syst. 38 (2): 144 – 165.Google Scholar
  22. Lindley, J. (1823). Eulophia gracilis. Slender Eulophia. Bot. Reg. 9: t. 742.Google Scholar
  23. Lindley, J. (1838). The genera and species of orchidaceous plants: 363. Ridgways, Piccadilly, London.Google Scholar
  24. Mildbraed, J. (1922). Wissenschaftliche Ergebnisse der Zweiten Deutschen Zentral-Afrika-Expedition 19101911. Band II: Botanik. Verlag von Klinkhardt & Biermann, Leipzig.Google Scholar
  25. Mytnik-Ejsmont, J. (2011). A monograph of the subtribe Polystachyinae Schltr. (Orchidaceae). University of Gdansk, Gdansk.Google Scholar
  26. Navarro Cerrillo, R. M., Clemente Muñoz, M. A., Kasimis, N. A., Padrón Cedres, E., Hernández Bermejo, E., Martín-Consuegra Fernández, E. & García Ferrer, A. (2012). Cartografía de la vegetación de la isla de Bioko (Guinea Ecuatorial) mediante el uso de imágenes Landsat 7 ETM+: particularización del piso afromontano. Darwiniana 50: 252 – 265.Google Scholar
  27. Olszewski, T. S. & Szlachetko, D. L. (1998). A provisional checklist of the orchids of Equatorial Guinea. Fragm. Florist. Geobot. 43: 13 – 38.Google Scholar
  28. Onana, J. M. (2011). Flore du Cameroun 39. The vascular plants of Cameroon. A taxonomic checklist with IUCN assessments. National Herbarium of Cameroon, Yaoundé.Google Scholar
  29. Podzorski, A. C. & Cribb, P. J. (1979). A revision of Polystachya sect. Cultriformis (Orchidaceae). Kew Bull. 34: 147 – 186.Google Scholar
  30. Reichenbach, H. G. (1866). Eulophia euglossa. Bot. Mag. 92: t. 5561.Google Scholar
  31. Reichenbach, H. G. (1881). Otia Botanica Hamburgensia 2: 118. Typis Theodor. Theophil. Meissneri, Hamburg.Google Scholar
  32. Rendle, A. B. (1895). Mr. Scott Elliot’s Tropical African orchids. J. Bot. 33: 277 – 281.Google Scholar
  33. Rendle, A. B. (1908). Monocotyledons. In: A. B. Rendle, E. G. Baker & S. Le M. Moore, An account of the plants collected on Mt. Ruwenzori by Dr. A. G. F. Wollaston. J. Linn. Soc., Bot. 38: 228 – 279.Google Scholar
  34. Rendle, A. B. (1913). Catalogue of the plants collected by Mr. & Mrs. P. A. Talbot in the Oban district South Nigeria: 107. Trustees of the British Museum, London.Google Scholar
  35. Richard, A. (1850). Tentamen Florae Abyssinicae 2: 292. Arthus Bertrand, Paris.Google Scholar
  36. Ridley, H. N. (1887). Orchideae. Bol. Soc. Brot. 5: 231 – 232.Google Scholar
  37. Rolfe, R. A. (1891). Orchideae in Catalogo de plantas da Africa Portugueza. Bol. Soc. Brot. 9: 135 – 143.Google Scholar
  38. Rolfe, R. A. (1897). Orchidaceae. In: D. Oliver et al., Flora of tropical Africa 7(1): 12 – 192. Lovell Reeve & Co., London.Google Scholar
  39. Rolfe, R. A. (1898). Orchidaceae. In: D. Oliver et al., Flora of tropical Africa 7(2): 193 – 292. Lovell Reeve & Co., London.Google Scholar
  40. Sanford, W.W. (1971). The orchid flora of Equatorial Guinea in relation to that of West Africa. Mitt. Bot. Staatssamml. München 10: 287 – 298.Google Scholar
  41. Schlechter, R. (1907, publ. 1906). Orchidaceae africanae. IV. Bot. Jahrb. Syst. 38 (2): 144 – 165.Google Scholar
  42. Schlechter, R. (1918). Versuch einer natürlichen Neuordnung der afrikanischen angraekoiden Orchidaceen. Beih. Bot. Centralbl. 36 (2): 62 – 181.Google Scholar
  43. Sosef, M. S. M., Wieringa, J. J., Jongkind, C. C. H., Achoundong, G., Azizet Issembé, Y., Bedigian, D., Van den Berg, R. G., Breteler, F. J., Cheek, M., Degreef, J., Faden, R. B., Goldblatt, D., Van der Maesen, L. J. G., Ngok Banak, L., Niangadouma, R., Nzabi, T., Nziengui, D., Rogers, Z. S., Stévart, T., Valkenburg, J. L. C. H., Walters, H. M. J. & De Wilde, J. J. F. E. (2006). Check-list des plantes vasculaires du Gabon / Checklist of Gabonese vascular plants. Jardin Botanique National de Belgique, Meise.Google Scholar
  44. Stévart, T. & de Oliveira, F. (2000). Guide des orchidées de São Tomé et Príncipe. ECOFAC, São Tomé.Google Scholar
  45. Summerhayes, V. S. (1934). African Orchids: VI. Bull. Misc. Inform. Kew 1934: 205 – 214.Google Scholar
  46. Summerhayes, V. S. (1936). Orchidaceae. In: J. Hutchinson & J. M. Dalziel, Flora of West Tropical Africa 2. Crown agents for the colonies, London.Google Scholar
  47. Summerhayes, V. S. (1937). African Orchids: IX. Bull. Misc. Inform., Kew 1937: 457 – 466.Google Scholar
  48. Summerhayes, V. S. (1945). African Orchids XVI. Bot. Mus. Leafl. 12: 89 – 116.Google Scholar
  49. Summerhayes, V. S. (1949). African Orchids: XIX. Kew Bull. 4: 427 – 443.Google Scholar
  50. Summerhayes, V. S. (1953). African Orchids: XXI. Kew Bull. 8: 129 – 162.Google Scholar
  51. Summerhayes, V. S. (1958). African Orchids: XXV. Kew Bull. 13: 57 – 87.Google Scholar
  52. Summerhayes, V. S. (1960). African Orchids: XXVII. Kew Bull. 14: 126 – 157.Google Scholar
  53. Szlachetko, D. L. (2008). Orchidaceae of Ivory Coast. Ruizia 20: 1 – 396.Google Scholar
  54. Szlachetko, D. L. & Olszewski, T. S. (1998). Flore du Cameroun 34. Musée National d’Histoire Naturelle, Paris.Google Scholar
  55. Szlachetko, D. L. & Olszewski, T. S. (2001a). Flore du Cameroun 35. Orchidacées 2. Ministère de la Recherche Scientifique et Technique, Yaoundé.Google Scholar
  56. Szlachetko, D. L. & Olszewski, T. S. (2001b). Flore du Cameroun 36. Orchidacées 3. Ministère de la Recherche Scientifique et Technique, Yaoundé.Google Scholar
  57. Szlachetko, D. L., Sawicka, M. & Kras-Lapinska, M. (2004a). Flore du Gabon 36. Orchidaceae I. Musée National d’Histoire Naturelle, Paris.Google Scholar
  58. Szlachetko, D. L., Sawicka, M. & Kras-Lapinska, M. (2004b). Flore du Gabon 37. Orchidaceae II. Musée National d’Histoire Naturelle, Paris.Google Scholar
  59. Thiers, B. (2017). Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden's Virtual Herbarium. Available from: (accessed: 28 October 2017)
  60. Velayos, M., Barberá, P., Cabezas, F., de la Estrella, M., Feró, M. & Aedo, C. (2014). Checklist of vascular plants of Annobón (Equatorial Guinea). Phytotaxa 171: 1 – 78.Google Scholar
  61. Velayos, M., Cabezas, F., Barberá, P., de la Estrella, M., Aedo, C., Morales, R., Quintanar, A., Velayos, G. & Feró, M. (2013). Preliminary checklist of vascular plants of Bioko Island (Equatorial Guinea). Bot. Complut. 37: 109 – 133.Google Scholar
  62. Vermeulen, J. J. (1984). Five new species and one new variety of continental African Bulbophyllum (Orchidaceae). Bull. Jard. Bot. Belg. 54: 137 – 150.Google Scholar
  63. Vermeulen, J. J. (1987). A taxonomic revision of the Continental African Bulbophyllinae. Orchid Monogr. 2: 1 – 300.Google Scholar
  64. White, F. (1983). The vegetation of Africa. Unesco, Paris.Google Scholar

Copyright information

© The Board of Trustees of the Royal Botanic Gardens, Kew 2019

Authors and Affiliations

  1. 1.Departamento de BiologíaUniversidad Autónoma de MadridMadridSpain
  2. 2.Departamento de Sistemas y Recursos NaturalesUniversidad Politécnica de MadridMadridSpain

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