Vol. 80 No. 2 Suppl. (2025)
Articles

Plagiosiphon intermedium (Leguminosae, Detarioideae), a new tree species from the Ngovayang forest in Cameroon

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  • Xander M. van der Burgt,
  • Eric Ngansop Tchatchouang,
  • Barthélemy Tchiengué
Xander M. van der Burgt
Herbarium, Royal Botanic Gardens, Kew, Richmond, TW9 3AE, UK
Eric Ngansop Tchatchouang
IRAD–National Herbarium of Cameroon, PO Box 1601, Yaoundé, Cameroon
Barthélemy Tchiengué
IRAD–National Herbarium of Cameroon, PO Box 1601, Yaoundé, Cameroon
DOI: https://doi.org/10.36253/jopt-18480

Published 2025-11-17

Keywords

  • Africa,
  • Endemic,
  • Fabaceae,
  • Leguminosae,
  • Plagiosiphon,
  • Endangered
    • ...More
    Less

How to Cite

van der Burgt, X. M., Ngansop Tchatchouang, E., & Tchiengué, B. (2025). Plagiosiphon intermedium (Leguminosae, Detarioideae), a new tree species from the Ngovayang forest in Cameroon. Webbia, 80(2), 175–181. https://doi.org/10.36253/jopt-18480

Copyright (c) 2025 Xander M. van der Burgt, Eric Ngansop Tchatchouang, Barthélemy Tchiengué

Creative Commons License

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

Abstract

Plagiosiphon intermedium Burgt, Ngansop & Tchiengué, Leguminosae–Detarioideae, is described and illustrated. It is a tree, to 34 m high, with a stem to 66 cm diameter. The leaves have (2 –)3–4(– 5) pairs of opposite leaflets, with the lowest pair often sub-opposite. The flowers are unknown. The fruit is a pod, brown, the valves more or less obovate in outline, 7–9.5 × 3.5–4.5 cm, without visible veins outside, short dense hairy outside. Plagiosiphon intermedium occurs in primary rain forest, at 760–870 m elevation. The tree species is endemic to the Ngovayang Massif in the South Region of Cameroon. Three herbarium collections have been made, in an extent of occurrence of only 0.51 km2. Plagiosiphon intermedium is provisionally assessed as Endangered B1(iii,v)+B2(iii,v).

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