Alternate Note:
This taxon would be best treated as a subsp., but the name ~D. c~. subsp. ~alpina~ (L.) Tzvelev is an illegitimate hom. due to the earlier heterotypic var. ~alpina~ Schur. A new comb., based on Schur's var., would be required for the subsp. (even though these both belong to the same subsp. as understood here). This viviparous entity is tentatively accepted for the Catalogue. It is reported from the Savage Isl., SE tip of Baffin Isl.
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