Summary
A description, illustration, distribution map and conservation assessment are given for each of three new species of Cunoniaceae from New Caledonia and plants endemic to the same localities from other genera are mentioned. Cunonia bopopensis Pillon & H. C. Hopkins is known from forest on ultramafic soils at high elevation on Mt Tchingou. This massif offers ecological conditions markedly different from those of its surroundings, which may explain the occurrence of several micro-endemics on this mountain. Some specimens of C. bopopensis were previously identified as C. bernieri Guillaumin but the type of the latter is probably a hybrid and this name is now considered doubtful. Geissois belema Pillon & H. C. Hopkins is endemic to Ile Art in the Belep archipelago, where it occurs in forest on ultramafic soils; it is the only species of Geissois known from Ile Art. Pancheria xaragurensis H. C. Hopkins & Pillon is found largely on the little-explored Forgotten Coast (“Côte Oubliée”) of south-eastern Grande Terre, generally in maquis along streams and in river beds at low elevation on ultramafic substrate. Morphological and ecological variation in the widespread taxa Geissois pruinosa Brongn. & Gris and Weinmannia dichotoma Brongn. & Gris are discussed and the combinations G. pruinosa var. intermedia (Vieill. ex Pamp.) H. C. Hopkins & Pillon and W. dichotoma var. monticola (Däniker) H. C. Hopkins & Pillon are published to accommodate some of this variability.
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Acknowledgements
Herbarium facilities were kindly provided by K, NOU and P, and we are grateful to BM for the loan of specimens and to Z for an image not available on their website. The expedition to the Forgotten Coast (“Côte Oubliée”) was supported by the Direction de l’Environnement de la Province Sud (DENV) and Pillon thanks the other participants in the expedition for their assistance in the field. Pillon also thanks the members of the botanical laboratory at IRD, Nouméa for their help and advice, and particularly Laure Barrabé for the excellent collections and photographs of Cunoniaceae from Ile Art and Frédéric Rigault for producing the distribution map of Geissois pruinosa. Field work by Hopkins was funded by the EU Human Capital and Mobility Fund, the National Geographic Society (via a grant to Jason Bradford) and a TOBU grant from the Royal Botanic Gardens, Kew, and she thanks Jason Bradford, Bruno Fogliani and Barry Donovan for collaboration in the field. At Kew, we are indebted to Katherine Challis and Melanie Thomas for translating the diagnoses into Latin, to Dick Brummitt for nomenclatural advice, and to Patricia K. R. Davies and Margaret Tebbs for the illustrations of new species. We are grateful to two reviewers for helpful comments on the manuscript.
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Hopkins, H.C.F., Pillon, Y. Further new endemic taxa of Cunoniaceae from New Caledonia. Kew Bull 66, 405–423 (2011). https://doi.org/10.1007/s12225-011-9299-3
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DOI: https://doi.org/10.1007/s12225-011-9299-3