106 populations of Symphytum officinale were cytologically investigated. The distribution of white-flowered diploids and white- and purple-flowered tetraploids in Europa is discussed. The authors present a hypothesis which aims to give an explanation for the observed differences in distribution pattern.

Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht

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Naturalis journals & series

Gadella, T. W. J., & Kliphuis, E. (1972). Cytotaxonimic studies in the genus Symphytum IV. Cytogeographic investigations in Symphytum officinale L. Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 372(1), 169–173.