Vol. 79 No. 2 (2024)
Articles

Xylopia nilotica (Annonaceae) in Ethiopia, Sudan, South Sudan, and Uganda, with a review of the genus in North Eastern Tropical Africa

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  • Ib Friis,
  • Odile Weber
Ib Friis
Natural History Museum of Denmark, University of Copenhagen, Universietsparken 15-DK-2100 Copenhagen Ø, Denmark
Bio
Odile Weber
Musée national d'histoire naturelle, Luxembourg
Bio
DOI: https://doi.org/10.36253/jopt-16134

Published 2024-09-03

Keywords

  • Annonaceae,
  • conservation,
  • modelled distribution,
  • Nile Basin,
  • North Eastern Tropical Africa,
  • Xylopia
    • ...More
    Less

How to Cite

Friis, I., & Weber, O. (2024). Xylopia nilotica (Annonaceae) in Ethiopia, Sudan, South Sudan, and Uganda, with a review of the genus in North Eastern Tropical Africa. Webbia, 79(2), 239–254. https://doi.org/10.36253/jopt-16134

Copyright (c) 2024 Ib Friis, Odile Weber

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Funding data

Abstract

Based on written records and specimens of the new species, Xylopia nilotica D. M. Johnson & N. A. Murray (2018), described from Uganda and west of the Nile in Sudan and South Sudan, we have mapped the species. We find that it also occurs east of the Nile in South Sudan and in western Ethiopia. Its habitats range from open rain forest to open woodland. Modelling the potential distribution of X. nilotica suggests that it occurs in the periphery of the upper Nile basin, but it is probably undercollected. The potential distributions of X. longipetala (a Guineo-Congolian species) and X. holtzii Engl. (an East African coastal species), distinct but previously considered conspecific with X. nilotica, only marginally overlap with that of X. nilotica, which is endemic to the countries Uganda, South Sudan, Sudan, and Ethiopia, apparently a unique pattern of endemism. The new information does not change the assessment of X. nilotica as Vulnerable (VU). Other species of Xylopia in North Eastern Tropical Africa are X. rubescens Oliver and X. thomsonii Oliver in the Equatoria region of South Sudan, and X. rubescens, X. staudtii Engl. & Diels, and X. aethiopica (Dunal) A. Rich. in Uganda. A record of X. aethiopica in Ethiopia is based on false label information on the only known specimen.

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