Ballmustard

Annual herbaceous plant 1.5–2 mm long. Introduced to Québec. Grows in fields and in urban areas. Flowers in June.

There are 34 observations of Ballmustard in Québec, mostly in Capitale-Nationale, Bas-Saint-Laurent and Saguenay–Lac-Saint-Jean, and it has been reported in 8 of the 17 regions.