Kew Bulletin

, 70:29 | Cite as

The Gilbertiodendron ogoouense species complex (Leguminosae: Caesalpinioideae), Central Africa

  • Xander M. van der BurgtEmail author
  • Barbara A. Mackinder
  • Jan J. Wieringa
  • Manuel de la Estrella


The Gilbertiodendron ogoouense species complex consists of 14 tree species. Eight species are here newly described and one is here reinstated: G. bambolense Burgt; G. breteleri Burgt; G. ebo Burgt & Mackinder; G. ecoukense (Pellegr.) Burgt; G. maximum Burgt & Wieringa; G. minkebense Burgt & Estrella; G. quinquejugum Burgt; G. scutatum Wieringa & Estrella and G. sulfureum Burgt. Five species in the complex were already recognised as accepted: G. brachystegioides (Harms) J. Léonard; G. klainei (Pierre ex Pellegr.) J. Léonard; G. newberyi Burgt; G. ngouniense (Pellegr.) J. Léonard and G. ogoouense (Pellegr.) J. Léonard. All 14 species are medium-sized or large trees of evergreen rain forest on well-drained or periodically inundated soil, at 0 – 900 m altitude. Each of the 14 species is distributed in one or more of the following Central African countries: Cameroon, Equatorial Guinea, Gabon, Congo (Brazzaville), Angola (Cabinda) and Congo (Kinshasa). Included are a key, a table comparing the main morphological characters, illustrations drawn to the same scale and distribution maps of all species. The conservation status of all species is assessed according to IUCN categories and criteria: G. maximum is classified as Critically Endangered, G. ebo and G. newberyi as Endangered, G. breteleri, G. klainei, G. minkebense, G. ngouniense and G. scutatum as Vulnerable, and the remaining six species as Least Concern.

Key Words

Conservation Macrolobium new species taxonomy 



The staff of the herbaria BM, BR, BRLU, IEC, K, MPU, P, PRE, SCA, WAG and YA facilitated visits to study the collections. The herbaria mentioned in the methods section prepared loans of their collections. The Bentham-Moxon Trust at K funded a field visit by Xander van der Burgt to Cameroon which resulted in the collection of the type specimens of Gilbertiodendron ebo. Manuel de la Estrella was funded by a Juan de la Cierva grant of the Spanish Ministry of Science and Innovation and a grant from the Natural Sciences and Engineering Research Council of Canada to Anne Bruneau; visited K herbarium under a European–funded Synthesis grant and received a travel award from the Québec Centre for Biodiversity Science. Martin Cheek from K is thanked for continuing encouragement. Katherine Challis from IPNI at K gave advice on nomenclature. Theo Damen from WAG provided photos of LBV specimens.


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Copyright information

© The Board of Trustees of the Royal Botanic Gardens, Kew 2015

Authors and Affiliations

  • Xander M. van der Burgt
    • 1
    Email author
  • Barbara A. Mackinder
    • 1
  • Jan J. Wieringa
    • 2
    • 3
  • Manuel de la Estrella
    • 4
  1. 1.Herbarium, Royal Botanic Gardens KewRichmondUK
  2. 2.Naturalis Biodiversity Centre (section NHN), Herbarium VadenseLeidenThe Netherlands
  3. 3.Biosystematics Group, Wageningen UniversityWageningenThe Netherlands
  4. 4.Institut de Recherche en Biologie Végétale and Département de Sciences BiologiquesUniversité de MontréalMontréalCanada

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