Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-23T08:07:51.295Z Has data issue: false hasContentIssue false
  • English
  • Français

A new species and hybrid in the St Helena endemic genus Trochetiopsis

Published online by Cambridge University Press:  26 April 2010

Q. C. B. Cronk
Q. C. B. Cronk
Affiliation:
Daubeny Herbarium, Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK.
Get access

Abstract

The discovery in historic herbaria of an overlooked extinct endemic from the island of St Helena is reported. The first descriptions of St Helena Ebony, Trochetiopsis melanoxylon (Sterculiaceae), and the specimens associated with them in the herbaria of Oxford University (OXF) and the Natural History Museum, London (BM), do not match living and later-collected material, and instead represent an extinct plant. A new name is therefore needed for living St Helena Ebony: Trochetiopsis ebenus Cronk sp. nov. The hybrid between this species and the related T. erythroxylon is also described here: Trochetiopsis × benjamini Cronk hybr. nov. (Sterculiaceae), and chromosome counts of 2n = 40 are reported for the hybrid and both parents for the first time. The re-assessment of the extinct ebony emphasizes the importance of historic herbarium collections for the study of species extinction.

Type
Articles
Information
Edinburgh Journal of Botany , Volume 52 , Issue 2 , July 1995 , pp. 205 - 213
Copyright
Copyright © Trustees of the Royal Botanic Garden Edinburgh 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Aiton, W. (1789). Hortus Kewensis; or, A Catalogue of the plants cultivated in the Royal Botanic Gardens at Kew (Ed. 1)2. London.CrossRefGoogle Scholar
Aiton, W. T. (1812). Hortus Kewensis (Ed. 2, enlarged by Aiton, W. T.) 4. London.Google Scholar
Andrews, H. (1804). Dombeya erythroxylon. Bot. Repos. 6: t.389. [Trochetiopsis ebenus.]Google Scholar
Bentham, G. (1862). Notes on Malvaceae and Sterculiaceae. J. Linn. Soc, Bot. 6: 97–123.Google Scholar
Clifford, H. T., Rogers, R. W. & Dettman, M. E. (1990). Where now for taxonomy? Nature 346: 602.CrossRefGoogle Scholar
Clokie, H. N. (1964). An Account of the Herbaria of the Department of Botany in the University of Oxford. Oxford.Google Scholar
Cronk, Q. C. B. (1983). The decline of the redwood Trochetiopsis erythroxylon in St Helena. Biol. Conserv. 26: 163–174.CrossRefGoogle Scholar
Cronk, Q. C. B. (1986). The decline of the St Helena Ebony Trochetiopsis melanoxylon. Biol. Conserv. 35: 159–172. [Trochetiopsis ebenus.]CrossRefGoogle Scholar
Cronk, Q. C. B. (1989). The past and present vegetation of St Helena. J. Biogeogr. 16: 47–64.CrossRefGoogle Scholar
Cronk, Q. C. B. (1990). The history of the endemic flora of St Helena: late Miocene Trochetiopsis-like pollen from St Helena and the origin of Trochetiopsis. New Phytol. 114: 159–165.CrossRefGoogle ScholarPubMed
Dandy, J. E. (1958). The Sloane Herbarium. London.Google Scholar
Diamond, J. M. (1990). Molecular evolution—old dead rats are valuable. Nature 347: 334–335.CrossRefGoogle ScholarPubMed
Gray, A. (transl. and ed.) (1890). The Voyage of Francois Pyrard of Laval to the East Indies, the Maldives, the Moluccas and Brazil. London.Google Scholar
Gyllenhaal, C., Soejarto, D. D., Farnsworth, N. R. & Huft, M. (1990). The value of herbaria. Nature 347: 704.CrossRefGoogle Scholar
Hooker, J. D. (1896). (ed.) Journal of the Right Hon. Sir Joseph Banks during Captain Cook's first voyage in H.M.S. Endeavour. London.Google Scholar
Marais, W. (1981). Trochetiopsis (Sterculiaceae), a new genus from St Helena. Kew Bull. 36: 645–646.CrossRefGoogle Scholar
W., Mönkmeyer (1890). Notizen über den botanischen Garten in Göttingen. Gartenflora 39: 94–103. [Trochetiopsis ebenus as ‘Trochetia erythroxylon’ on p. 96 (Abb. 17) and p. 97.]Google Scholar
Plukenet, L. (1700). Almagesti botanici mantissa plantarum novissime detectarum ultra Millenarium numerum complectens. London.Google Scholar
Pyrard, F. (1679) Voyage de F. Pyrard de Laval. Nouvelle edition, augmentee … par Du Val. Paris.Google Scholar
Sims, J. (1807). Pentapetes erythroxylon. St Helena Red-Wood. Curtis's Botanical Magazine 25: t.1000. [Trochetiopsis ebenus.]Google Scholar
Solander, D. (manuscript). Plantae Insulae Sanctae Helenae. Manuscript florula in the Botany Library, Natural History Museum [British Museum (Natural History).]Google Scholar
Watson, W. (1890). A Survivor. Gardeners' Chronicle, Ser. 3, 7: 512–513.Google Scholar
West, J. G. & Conn, B. J. (1990). In defence of taxonomy. Nature 347: 222.CrossRefGoogle Scholar