Original : A small herb. It grows 90 cm high. It has a thin rhizome. It can be smooth or hairy. The leaves are 2.5-5 cm long. They have teeth around the edge. The leaves are oval or sword shaped. The flowers are at the top of the shoots. They are small and purple in 2-3 rings{{{0(+x).
Original : It is a temperate plant. It grows in marshes and beside running water. In Argentina it grows from sea level to 3,300 m above sea level. It suits hardiness zones 7-9{{{0(+x).