(1) Mustard, Brassica millet.

(2) shepherd's purse, shepherd's purse is an annual or biennial herb.

2. Mustard and Brassica belong to panicum miliaceum, with a height of 30- 150 cm, often hairless, and sometimes young stems and leaves have prickly hairs, frosty and spicy; The stems are erect and branched. Basal leaves are broadly ovoid to obovate, blunt at the top, cuneate at the base, with large pinnate compound leaves, 2-3 pairs of lobes, or undivided, with notched edges or teeth, petiole 3-9 cm long and lobulated; The leaves at the lower part of the stem are small, with concave edges or teeth, and sometimes with blunt serrations, which do not support the stem; Upper leaves of stem narrowly lanceolate, margin inconspicuously sparsely toothed or entire. Racemes are terminal and extend after flowering; Flower yellow; Pedicel 4-9 mm long; Sepals pale yellow, oblong and oval, spreading upright; Petals obovate. Silique linear, fruit petals with 1 protruding midvein; The beak length is 6- 12 mm; Pedicel is 5-15mm long. The seeds are spherical, about 65438±0mm in diameter and purple-brown. The flowering period is from March to May, and the fruiting period is from May to June.