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Kew Bulletin

, Volume 65, Issue 3, pp 401–420 | Cite as

A revision of the genus Talbotiella Baker f. (Caesalpinioideae: Leguminosae)

  • Barbara A. Mackinder
  • Jan J. Wieringa
  • Xander M. van der Burgt
Article

Summary

A revision of the genus Talbotiella Baker f. (Caesalpinioideae: Leguminosae) is presented. Four species from Cameroon are described as new and a species of Hymenostegia, also from Cameroon, is transferred to Talbotiella bringing the number of species in Talbotiella to eight: T. bakossiensis Cheek, T. batesii Baker f., T. breteleri (Aubrév.) Mackinder & Wieringa, T. ebo Mackinder & Wieringa, T. eketensis Baker f., T. gentii Hutch. & Greenway, T. korupensis Mackinder & Wieringa and T. velutina Burgt & Wieringa. The centre of diversity is Cameroon where six of the eight species occur, five of which are country endemics. Vegetative characters that can be used to distinguish the species are provided in tabular form. Species distributions are mapped and all species are assessed for conservation status.

Key Words

Cameroon endemic species Detarieae endangered species Fabaceae Ghanaian endemic species Leguminosae Nigerian endemic species Tropical Africa 

Notes

Acknowledgements

The first two authors received support from the SYNTHESYS Project http://www.synthesys.info/ which is financed by European Community Research Infrastructure Action under the FP6 "Structuring the European Research Area" Programme. Specifically, The Netherlands Taxonomic Facility of the SYNTHESYS project provided funds which allowed the first author to travel to the Netherlands to undertake a collaborative study of the generic limits of Talbotiella (NL-TAF-173). We are grateful to the curators of B, BM, BR, FHO, P, MO and YA for the loan of their specimens and to Yvette Harvey who, with the kind permission of the curators of GC, photographed their holdings of Talbotiella. We would like to thank Jean-Michel Onana and our other colleagues at the National Herbarium of Cameroon, Yaoundé for their co-operation and support in Cameroon. We also thank the villagers of Kodmin who kindly assisted the exploration for T. bakossiensis.

Some of the relevant fieldwork for the project was dependent on the Earthwatch Institute (Europe) with the support of DGVIII of the European Commission.

The discovery of Talbotiella velutina resulted from work that was supervised by Prof. D. M. Newbery of the Institute of Plant Sciences, Bern and funded by the Swiss National Science Foundation. We thank the Cameroon government for permission to carry out research in Cameroon and Korup National Park (Conservator, A. Kembou) for access to the site. Moses Elangwe climbed the tree from which the type of T. velutina was collected. Wolfgang Bischoff, Moses Eyakwe and Motoh Jackson provided field assistance.

Under the aegis of CRES, with considerable logistic support from Bethan Morgan, Head of the Ebo Forest Research Station and her staff, we were able to visit the proposed Ebo National Park, and locate a second mature specimen and first stipules and seedlings of Talbotiella ebo, a species previously only collected once before by Renée Letouzey.

We are grateful to Melanie Thomas for translating the diagnoses into Latin. We would also like to thank Margaret Tebbs for preparing the illustration of Talbotiella bakossiensis and Hans de Vries for preparing the illustrations of T. ebo and T. korupensis.

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Copyright information

© The Board of Trustees of the Royal Botanic Gardens, Kew 2010

Authors and Affiliations

  • Barbara A. Mackinder
    • 1
  • Jan J. Wieringa
    • 2
  • Xander M. van der Burgt
    • 1
  1. 1.HLAARoyal Botanic Gardens, KewRichmondUK
  2. 2.National Herbarium of the NetherlandsWageningen University Branch, Biosystematics GroupWageningenThe Netherlands

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