971 Capsella bursa-pastoris (L.) Med.

This species includes at least two taxa, viz. subsp. bursa-pastoris, of Eurasiatic (probably Mediterranean) origin but nowadays widely spread as a weed, and subsp. rubella (Reut.) Bertsch occurring mainly S of the broken line through C. Europe eastwards but introduced into, among other places, W. Alaska. With its present distribution the species belongs to the circumpolar plants (Hultén, Circumpol. Il, p. 284 and map 275). It has been introduced into a great many places around the world.