When was shepherd's purse discovered

Shepherd's purse is the young leaves of cruciferous plants, also known as ground vegetables, is a favorite wild vegetable. Native to China.

Currently all over the world, China since ancient times, the collection of wild caper to eat, as early as 300 BC end caper records. the late 19th century to the early 20th century, the suburbs of Shanghai began to date has been more than ninety years of cultivation history.