descurainia sophia

Descurainia sophia is a member of the family Brassicaceae. Common names include flixweed, herb-Sophia and tansy mustard. It reproduces by seeds. It is a dominant weed in dark brown prairie and black prairie soils of southern Alberta. Its stem is erect, branched, and 4–30 in (10–76 cm) high. It was once given to patients suffering from dysentery and called by ancient herbalists Sophia Chirurgorum, 'The Wisdom of Surgeons'. It is the type species of the genus Descurainia and of the rejected genus ...