Plant Ecology and Evolution 151(3): 434-441, doi: 10.5091/plecevo.2018.1503
Notes on the endemic plant species of the Ebo Forest, Cameroon, and the new, Critically Endangered, Palisota ebo (Commelinaceae)
expand article infoMartin Cheek, Gerhard Prenner§, Barthélemy Tchiengué|, Robert B. Faden
‡ Royal Botanic Gardens Kew, United Kingdom§ Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AE, United Kingdom| Herbier National Camerounais, Yaoundé, BP 1601, Cameroon¶ Department of Botany, MRC-166, National Museum of Natural History, Smithsonian Institution, PO Box 37012, Washington, DC, 20013-7012, United States of America
Open Access

Background and aims – This paper reports a further discovery in the context of a long-term botanical survey in the Cross River-Sanaga interval of west-central Africa, focussing on species discovery and conservation.

Methods – Normal practices of herbarium taxonomy have been applied to study the material collected. The relevant collecting data are stored in the Herbarium of the Royal Botanic Gardens, Kew, London.

Key results – The growing number of endemic species being discovered from the Ebo forest of Cameroon points to the importance of its conservation. Palisota ebo Cheek (Commelinaceae) is described as an additional new species to science and is compared with P. flagelliflora Faden. Restricted so far to the Ebo Forest its conservation status is assessed as Critically Endangered (CR B1+2ab(iii)) according to the 2012 criteria of IUCN.

conservation, geocarpy, conservatory plant, Tropical Important Plant Areas, variegated leaves


  • Abwe E.E., Morgan B.J. (2008) The Ebo Forest: four years of preliminary research and conservation of the Nigeria-Cameroon chimpanzee (Pan troglodytes vellerosus). Pan Africa News 15: 26–29.
  • Bachman S.P., Nic Lughadha E.M., Rivers M.C. (2018) Quantifying progress towards a conservation assessment for all plants. Conservation Biology 32: 516–524.
  • Barthlott W., Lauer W., Placke A. (1996) Global distribution of species diversity in vascular plants: towards a world map of phytodiversity. Erkunde 50: 317–328 (with supplement and figure).
  • Brenan J.P.M. (1963) Commelinaceae. In: Hepper F.N. (ed.) Flora of West tropical Africa 3: 22–50. London, Crown Agents.
  • Cable S., Cheek M. (1998) The plants of Mt Cameroon, a conservation checklist. Kew, Royal Botanic Gardens.
  • Cheek M., Cable S. (1997) Plant inventory for conservation management: the Kew-Earthwatch programme in Western Cameroon, 1993–1996. In: Doolan S. (ed.) African rainforests and the conservation of biodiversity: 29–38. Oxford, Earthwatch Europe.
  • Cheek M., Onana J-M., Pollard B.J. (2000) The Plants of Mount Oku and the Ijim Ridge, Cameroon, a conservation checklist. Kew, Royal Botanic Gardens.
  • Cheek M., Mackinder B. Gosline G., Onana J.-M., Achoundong G. (2001) The phytogeography and flora of western Cameroon and the Cross River-Sanaga River interval. Systematics and Geography of Plants 71: 1097–1100.
  • Cheek M., Csiba L. (2002) A new epiphytic species of Impatiens (Balsaminaceae) from western Cameroon. Kew Bulletin 57: 669–674.
  • Cheek M., Williams S., Etuge M. (2003) Kupea martinetugei, a new genus and species of Triuridaceae from western Cameroon. Kew Bulletin 58: 225–228.
  • Cheek M., Pollard B.J., Darbyshire I., Onana J., Wild C. (2004) The plants of Kupe, Mwanenguba and the Bakossi Mountains, Cameroon. A conservation checklist. Kew, Royal Botanic Gardens.
  • Cheek M., Achoundong G., Onana J.-M., Pollard B., Gosline G., Moat J., Harvey Y.B. (2006) Conservation of the Plant Diversity of Western Cameroon. In: Ghazanfar S.A., Beentje H.J. (eds) Taxonomy and ecology of African plants, their conservation and sustainable use. Proceedings of the 17th AETFAT Congress, Addis Ababa, Ethiopia: 779–791. Kew, Royal Botanic Gardens.
  • Cheek M., Osborne J. (2010) Myrianthus fosi (Cecropiaceae) a new submontane fruit tree from Cameroon. In: Harvey Y.H., Tchiengue B., Cheek M. (eds) The plants of the Lebialem Highlands, a conservation checklist: 59–64. Kew, Royal Botanic Gardens.
  • Cheek M., Onana J. (2011) Red data species in Cameroon, a guide for secondary school teachers. Kew, Royal Botanic Gardens.
  • Cheek M., Feika A., Lebbie A., Goyder D., Tchiengue B., Sene O., Tchouto P., van der Burgt X. (2017) A synoptic revision of Inversodicraea (Podostemaceae). Blumea 62: 125–156.
  • Cheek M., Tsukaya H., Rudall P.J., Suetsugu K. (2018) Taxonomic monograph of Oxygyne (Thismiaceae), rare achlorophyllous mycoheterotrophs with strongly disjunct distribution. PeerJ 6:e4828.
  • Darbyshire I., Anderson S., Asatryan A., et al. (2017) Important Plant Areas: revised selection criteria for a global approach to plant conservation. Biodiversity and Conservation 26: 1767–1800.
  • Faden R.B. (1995) Palisota flagelliflora (Commelinaceae), a new species from Cameroon with a unique habit. Novon 5: 246–251.
  • Faden R.B. (2007) Taxonomic problems in the genus Palisota (Commelinaceae) in Tropical East Africa. Kew Bulletin 62: 133–138.
  • Gawaorecki M. (2016) Gorillas in threatened Cameroon forest caught on film for first time. Available from: [accessed 10 Mar. 2018].
  • Harvey Y., Pollard B.J., Darbyshire I., Onana J., Cheek M. (2004) The plants of Bali Ngemba Forest Reserve, Cameroon: a conservation checklist. Kew, Royal Botanic Gardens.
  • Harvey Y.H., Tchiengue B., Cheek M. (2010) The plants of the Lebialem Highlands, a conservation checklist. Kew, Royal Botanic Gardens.
  • IPNI (continuously updated) The International Plant Names Index. Available from: [accessed 1 Mar. 2018].
  • IUCN (2012) IUCN red list categories: version 3.1. Gland, Switzerland & Cambridge, U.K., IUCN Species Survival Commission.
  • Kenfack D., Gosline G., Gereau, R.E., Schatz G. (2003) The genus Uvariopsis in Tropical Africa, with a recombination and one new species from Cameroon. Novon 13: 443–449.
  • Kew R.B.G. (2016) The state of the world’s plants report–2016. Kew, Royal Botanic Gardens.
  • Mackinder B.A., Wieringa J.J., van der Burgt X.M. (2010) A revision of the genus Talbotiella Baker f. (Caesalpinioideae: Leguminosae). Kew Bulletin 65: 401–420.
  • Mowbray S. (2017) Ebo forest great apes threatened by stalled Cameroon national park. Available from: [accessed 10 Mar. 2018].
  • McNeill J., Barrie F.R., Buck W.R., Demoulin V., Greuter W., Hawksworth D.L., Herendeen P.S., Knapp S., Marhold K., Prado J., Prud’homme Van Reine WF. (2012) International Code of nomenclature for algae, fungi and plants. Regnum Vegetabile 154. Königstein, Koeltz Scientific Books.
  • Nic Lughadha E., Govaerts R., Belyaeva I., Black N., Lindon H., Allkin R., Magill R.E., Nicolson N. (2016) Counting counts: revised estimates of numbers of accepted species of flowering plants, seed plants, vascular plants and land plants with a review of other recent estimates. Phytotaxa 272: 82–88.
  • Onana J., Cheek M. (2011) Red data book of the flowering plants of Cameroon, IUCN global assessments. Kew, Royal Botanic Gardens.
  • Stoffelen P., Cheek M., Bridson D., Robbrecht E. (1997) A new species of Coffea (Rubiaceae) and notes on Mt Kupe (Cameroon). Kew Bulletin 52: 989–994.
  • Thiers B. (continuously updated) Index Herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: [accessed 1 Mar. 2018].
  • van der Burgt X.M., Mackinder B.A., Wieringa J.J. et al. (2015) The Gilbertiodendron ogoouense species complex (Leguminosae: Caesalpinioideae), Central Africa. Kew Bulletin 70: 29.