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Ecology and geography of hybridisation in British and Irish horsetails

Published online by Cambridge University Press:  05 December 2011

C. N. Page  and
Marian A. Barker
C. N. Page
Affiliation:
Royal Botanic Garden, Edinburgh EH3 5LR, Scotland, U.K.
Marian A. Barker
Affiliation:
Nature Conservancy Council, Plas Penrhos, Bangor, Wales, U.K.
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Synopsis

Hybridisation in Equisetum in Britain and Ireland is examined in respect of the exceptional numbers of hybrids present, their geographic and ecological distribution, their formation and subsequent spread.

It is concluded that the moist oceanic climate and relative paucity of competing species in the British and Irish floras in post-glacial time have created uniquely favourable conditions for the formation and subsequent success of hybrid horsetails, promoting both the short-term persistence of weaker hybrids, and the extremly long-term persistence of others.

The taxonomic inter-relations of parental combinations which have formed ecologically successful hybrids are discussed.

Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh, Section B: Biological Sciences , Volume 86: The Biology of Pteridophytes , 1985 , pp. 265 - 272
Copyright
Copyright © Royal Society of Edinburgh 1985

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