Eutrema edwardsii

About

Eutrema edwardsii, called Edwards' mock wallflower, is a species of flowering plant in the wasabi genus Eutrema, mustard family Brassicaceae. It has a nearly panarctic distribution, only absent from northern Europe, and extending to Tibet. A rhizomatous geophyte reaching 18 in (46 cm), it is found in a variety of arctic and subarctic habitats; tundra, screefields, formerly glaciated hills, grassy streamsides, and peat ridges. It is an allopolyploid complex of tetraploid, hexaploid, and octaploid populations.

Summary from Wikipedia