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Observations on the ecology of hybridisation in the clubmosses (Lycopodiaceae)

Published online by Cambridge University Press:  05 December 2011

Benjamin Øllgaard
Benjamin Øllgaard
Affiliation:
Botanical Institute, University of Aarhus, 68 Nordlandsvej, DK-8240 Risskov, Denmark
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Synopsis

Ecological conditions for intergametophytic mating and interspecific hybridisation in the clubmosses are discussed. Several features, including the number of recorded hybrids, records of gametophyte population densities, and conditions for movement of the male gamete in the soil, indicate that intergametophytic mating in Lycopodium is not especially impeded by the subterranean habitat, as has been commonly assumed. The evidence from one site indicates highly effective spore dispersal, and a greater ecological tolerance than expected for the species involved. Two cases are discussed in which hybrids have been formed between ecologically and/or taxonomically very different parent species, in the absence of one parent sporophyte, or with one of the parent species sporophyte poorly adapted to the hybrid habitat. The protected, relatively uniform, subterranean gametophyte habitat is thought to account for successful gametophyte growth and hybridisation between species of widely different sporophyte ecology.

Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh, Section B: Biological Sciences , Volume 86: The Biology of Pteridophytes , 1985 , pp. 245 - 251
Copyright
Copyright © Royal Society of Edinburgh 1985

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