Summary
Hybrids between Senecio vulgaris L. f. radiatus Hegi and S. squalidus L. were obtained with little difficulty. This is in marked contrast to the experience of other workers attempting the cross using S. vulgaris L. f. vulgaris. The implication is that the spread of S. vulgaris f. radiatus may have important effects on the isolation of the species when it is in contact with S. squalidus.
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References
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Ingram, R. Synthesis of the hybrid Senecio squalidus L. × S. vulgaris L. F. radiatus hegi. Heredity 39, 171–173 (1977). https://doi.org/10.1038/hdy.1977.54
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DOI: https://doi.org/10.1038/hdy.1977.54
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