1. Mustard is a genus of Brassica native to China, with bitter-tasting leaves and a pungent, spicy flavor throughout its body, so it is commonly eaten as a condiment. Potherb mustard is a variant of mustard and is also known as snowberry.

2, the leaf surface of mustard is broad and thick, the leaf stalks are thick, the upper leaves are narrow, mostly lanceolate, the leaf stalks of potherb mustard are thinner, the leaf surface is narrow, the upper and top leaves are smaller, oblong, and entire and crumpled.