Scientific name: Brassicaceae

Worldwide, this family has about 3,700 species. In Nunavut there are more than 40 species, none of which are economically important and few of which have Inuktitut names. In Nunavut, there are species in 11 genera in the family. Many of the plants in Nunavut have tiny white or yellow flowers that are less than 5 millimetres across.

This family contains economically important flowering plants such as broccoli, cabbage, cauliflower, radish, and turnip. Many members have a group of chemicals (glucosinolate compounds) that have the smell of mustard or plants like cabbage when they are being cooked. Arctic plants do not produce much of these chemicals in the short growing season. source

Edible as cooked greens.
boil older plants in two changes of water to reduce bitterness.
varieties in Nunavut are True mustards (Brassica spp.), Wintercresses (Barbarea spp.), Tansy mustards (Descurainia spp.) and Tumble-mustards (Sisymbrium spp.).
grows in open, disturbed areas in plains, foothills, and montane regions. source