Plant Ecology and Evolution 153(2): 312-320, doi: 10.5091/plecevo.2020.1709
A new species of Drypetes (Putranjivaceae) discovered by J. Léonard in the Democratic Republic of the Congo
expand article infoAlejandro Quintanar, David J. Harris§, Patricia Barbera|
‡ Herbario MA, Unidad de Herbarios, Real Jardín Botánico de Madrid CSIC, 28014 Madrid, Spain§ Royal Botanic Garden Edinburgh, Edinburgh, United Kingdom| Missouri Botanical Garden, St. Louis, United States of America
Open Access

Background – During his stay in Yangambi in the 1940s, the Belgian botanist J. Léonard collected a species of the genus Drypetes endemic to the Democratic Republic of the Congo. He named it D. morocarpa on herbarium labels, but never published it.

Methods – The present study is based on the revision of 26 collections of D. morocarpa. Morphometric measurements on herbarium specimens belonging to the new species and its closest relatives in Drypetes were carried out in order to describe this new species.

Results – We describe here D. morocarpa J.Léonard ex D.J.Harris & Quintanar. It is easily recognisable by its blackish twigs and young branchlets, orbicular stipules, leaf blades usually entire, and hard fruits, covered with irregular protuberances. It has been collected in two areas along the course of the Congo river or its tributaries. A differential diagnosis, a detailed morphological description, a key to distinguish it from the most similar species, an illustration and all the available information about its habitat, distribution and conservation status are provided.

Central Africa, Congo Basin, Drypetes, new species, Putranjivaceae, Yangambi


  • Bachman S., Moat J., Hill A.W., de la Torre J., Scott B. (2011) Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. ZooKeys 150: 117–126.
  • Duculot J. (1964) L’eau en milieu rural centre-africain. Académie royale des sciences d’outre-mer. Classe des sciences naturelles et médicales, Mémoires in-8° 16: 326.
  • Esri (2019) ArcView GIS v. 3.2 for Windows. Available at [accessed 4 May 2020].
  • Fabri R. (2013) Jean Léonard (1920–2013), cofondateur et cheville ouvrière de l’AETFAT. In: Beau N., Dessein S., Robbrecht E. (eds) African Plant Diversity, Systematics and Sustainable Development: Proceedings of the XIXth AETFAT Congress, held at Antananarivo, Madagascar, 26–30 Apr. 2010. Scripta Botanica Belgica 50: 417. Meise, National Botanic Garden of Belgium.
  • Govaerts R., Frodin D.G., Radcliffe-Smith A. (2000) World checklist and bibliography of Euphorbiaceae. Kew, Royal Botanic Gardens, Kew.
  • INEAC (1957) Rapport annuel pour l’exercice 1957. Publications de l’Institut national pour l’étude agronomique du Congo belge, Hors série 1957: 124–125.
  • IUCN (2019) The IUCN Red List of Threatened Species. Version 2019-3. Available at [accessed 10 Dec. 2019].
  • Jardin botanique Meise (2014) Rapport annuel 2013: 37. Meise, Jardin botanique Meise.
  • Koy J.K., Wardell D.A., Mikwa J.F., Kabuanga J.M., Monga Ngonga A.M., Oszwald J., Doumenge C. (2019) Dynamique de la déforestation dans la Réserve de biosphère de Yangambi (République démocratique du Congo): variabilité spatiale et temporelle au cours des 30 dernières années. Bois et Forêts des Tropiques 341: 15–28.
  • Mayné R., Donis C. (1960) Hôtes entomologiques du bois: Espèces relevées à Yangambi après abattage. Publications de l’Institut National pour l’Etude Agronomique du Congo belge 38: 78, 87, 248.
  • Pax F.A., Hoffmann K. (1922) Euphorbiaceae-Phyllanthoideae-Phyllantheae. In: Engler H.G.A. (ed.) Das Pflanzenreich. Regni vegetabilis conspectus 147, 15(Heft 81). Leipzig, Verlag von Wilhelm Engelmann.
  • Radcliffe-Smith A. (2001) Genera Euphorbiacearum. Kew, Royal Botanic Gardens, Kew.
  • Stearn W.T. (1973) Botanical Latin. Second edition. London, David & Charles Newton Abbot.
  • Thiers B. (continuously updated) Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available at [accessed 12 Dec. 2019].