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The taxonomy, distribution, ecology and cultivation requirements of the widespread eastern Asiatic Adenophora triphylla (Thunb. ex Murray) A.DC. (Campanulaceae) are discussed. There is a full description of the species and its two varieties, var. triphylla and var. japonica (Regel) Hara, and a colour plate of the latter.
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Hall et al. (1999) studied this question.
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