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VARIATION IN FOUR POPULATIONS OF SENECIO VISCOSUS L. AS REVEALED BY A CULTIVATION EXPERIMENT
Author(s) -
AKEROYD J. R.,
WARWICK S. I.,
BRIGGS D.
Publication year - 1978
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1978.tb02645.x
Subject(s) - outcrossing , biology , senecio , botany , ecology , pollen
SUMMARY From fruits of Senecio viscosus L., collected on three coastal shingle beaches and at one inland site, plants were grown in a garden trial, which revealed statistically significant differences between and within the four populations. Particularly distinctive were the early‐flowering dwarf plants raised from fruits collected from coastal shingle at Thorpeness. Bagging of capitula indicated that S. viscosus is self‐compatible, although within‐family variances and the frequency of insect visits to the experiment suggest that outcrossing occurs. Further experiments and observations are necessary to establish the frequency of self‐ and cross‐fertilization in natural populations of the species. The implications of the experiment, as regards the distribution and genecology of S. viscosus in Britain, are discussed, with special emphasis on the differences between coastal shingle populations.