Abstract
Comparison of the morphology of the perianth of T. quinquedentata var. turgida (Lindb.) Weim. from the Alpine region of Scandinavia and the perianth of T. quinquedentata var. quinquedentata from the temperate part of the same area indicates a less close affinity than recognized by previous workers and evidence is presented to elevate T. q. var. turgida to rank of subspecies.

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