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      Three new species of Uvariodendron (Annonaceae) from coastal East Africa in Kenya and Tanzania

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          Abstract

          East Africa is a hotspot of biodiversity with many endemic plant species. We describe three new species of the genus Uvariodendron ( Annonaceae ) from the coastal forests of Kenya and Tanzania. Uvariodendron mbagoi Dagallier & Couvreur, sp. nov. is endemic to Tanzania and unique within the genus by its strong bergamot scent and its tomentose fruits having regular tufts of higher hair density. Uvariodendron dzomboense Dagallier, W.R.Q. Luke & Couvreur, sp. nov. is endemic to Dzombo Hill in Kenya and is rendered distinct by its small leaves and very densely pubescent carpels. Uvariodendron schmidtii W.R.Q. Luke, Dagallier & Couvreur, sp. nov. is endemic to Shimba Hills in Kenya and differs by its small flowers and fused sepals forming a ring. Following IUCN criteria we assessed U. mbagoi and U. dzomboense as endangered (EN) while U. schmidtii is assessed as Vulnerable (VU). We also propose a new combination: Polyceratocarpus oligocarpus (Verdc.) Dagallier, comb. nov. The description of these three new species underlines the richness in endemics in East Africa and that new discoveries might arise from further botanical exploration of this region.

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          Most cited references 41

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          Biodiversity hotspots for conservation priorities.

          Conservationists are far from able to assist all species under threat, if only for lack of funding. This places a premium on priorities: how can we support the most species at the least cost? One way is to identify 'biodiversity hotspots' where exceptional concentrations of endemic species are undergoing exceptional loss of habitat. As many as 44% of all species of vascular plants and 35% of all species in four vertebrate groups are confined to 25 hotspots comprising only 1.4% of the land surface of the Earth. This opens the way for a 'silver bullet' strategy on the part of conservation planners, focusing on these hotspots in proportion to their share of the world's species at risk.
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            The biological importance of the Eastern Arc Mountains of Tanzania and Kenya

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              Plant diversity and endemism in sub-Saharan tropical Africa

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                Author and article information

                Contributors
                Journal
                PhytoKeys
                PhytoKeys
                3
                urn:lsid:arphahub.com:pub:F7FCE910-8E78-573F-9C77-7788555F8AAD
                PhytoKeys
                Pensoft Publishers
                1314-2011
                1314-2003
                2021
                12 March 2021
                : 174
                : 107-126
                Affiliations
                [1 ] DIADE, Univ Montpellier, IRD, CIRAD, Montpellier, France Univ Montpellier Montpellier France
                [2 ] The Herbarium, Botany Department, Box 35060, University of Dar es Salaam, Dar es Salaam, Tanzania University of Dar es Salaam Dar es Salaam Tanzania
                [3 ] East African Herbarium, National Museums of Kenya, P. O. Box 45166 00100, Nairobi, Kenya National Museums of Kenya Nairobi Kenya
                [4 ] Pontificia Universidad Católica del Ecuador, Facultad de Ciencias Exactas y Naturales Av. 12 de Octubre 1076 y Roca, Quito, Ecuador Pontificia Universidad Católica del Ecuador Quito Ecuador
                Author notes
                Corresponding author: Léo-Paul M.J. Dagallier ( leopauldagallier@ 123456gmail.com )

                Academic editor: Y. Mutafchiev

                Article
                61630
                10.3897/phytokeys.174.61630
                7979674
                Léo-Paul M.J. Dagallier, Frank M. Mbago, W.R. Quentin Luke, Thomas L.P. Couvreur

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                Funding
                Funded by: Agence Nationale de la Recherche 501100001665 http://doi.org/10.13039/501100001665
                Categories
                Research Article
                Annonaceae
                Taxonomy
                Kenya
                Tanzania

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