Origin

Native to Europe; grows in cool climate in India. (Hollow Crown, Student and Large Guernsey are Indian horticultural varieties.)

Action:

Above ground parts— diuretic, carminative (eaten as a vegetable and salad), used for kidney disorders.

Root—used for kidney disorders, fever and as a diuretic and analgesic.

Khare, C.P./ Indian Medicinal Plants. -- Nueva Dheli: Springer, 2007 . - p  469.