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CYTOTAXONOMIC STUDIES IN THE GENUS SYMPHYTUM. VI. SOME NOTES ON SYMPHYTUM IN BRITAIN
Author(s) -
Gadella T. W. J.,
Kliphuis E.,
Perring F. H.
Publication year - 1974
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1974.tb00960.x
Subject(s) - botany , biology , genus , white (mutation) , genetics , gene
SUMMARY 122 British plants of the genus Symphytum were investigated cytologically. White‐flowered diploid (2n = 24) and white‐ and purple‐flowered tetraploid (2n = 48) plants of S. officinale occur in Britain. S. × uplandicum , the hybrid between S. officinale (2n = 40 or 2n = 48) and S. asperum (2n = 32) is variable, but two types can be distinguished, the first of which has 2n = 36, purple flower‐buds and purple (or blue‐purple) corollas, the second 2n = 40, pink flower‐buds and pink corollas, which turn blue when the flowers age. The way in which these hybrids arose is discussed.