Morphological evidence of hybridization among Tilia cordata and T. platyphyllos is presented in plots of principal components analysis (PCA) and Wells' distance diagrams, the latter based on differently weighted characters. Putative hybrids from both natural and planted stands in Denmark are studied. Plausible hybrids found by running Estabrook's HYWIN program on the data are almost identical with those found by PCA and the weighted Wells' distance coefficient.
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Wicksell et al. (1999) studied this question.
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