The origin of radiate Senecio vulgaris L.

Abstract

SummaryOver the past 20 years there has been a rapid spread in the British Isles of the radiate variant of Senecio vulgaris L. The evidence that this variant has arisen (a) from introgression into S. vulgaris by S. squalidus, or (b) as a mutant of S. vulgaris, is summarised. It is concluded that the latter alternative seems at least equally plausible… (More)
DOI: 10.1038/hdy.1977.80

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