Abstract:Symphytum is regarded one of the most complicated genera in terms of the classification of its members among the Boraginaceae. In addition to different infrageneric classification methods, several species complex or aggregates have been proposed to deal with the taxonomical problem of genus members. Symphytum asperum aggregate was first introduced by Kurtto, who proposed six taxa within this aggregate. However, according to further studies by different researchers based on morphological data, total number of s… Show more
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