Melancalyx uniflora, known commonly as arctic bellflower and arctic harebell, is a short and slender rhizomatous perennial in the bellflower family Campanulaceae. It is distributed in arctic North America, including the Rocky Mountains and Greenland, in the Asian part of Beringia and in Iceland, Svalbard, the Scandes Mountains and Novaja Zemlja.

The species was recorded by Linnaeus on his 1732 expedition to Lapland and described in his Flora Lapponica (1737).

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