This product is a liliaceous plant leek Allium tuberosum Rottler seed is the dried ripe seed extract. Herbs perennial, full of grass odor. Bulb narrowly conical. Leaves basal, flattened, narrowly linear, 15 ~ 30cm, width of 1.5 ~ 6mm. Stem length 30 ~ 50cm, terminal umbels, with 20 to 40 flowers; involucral bracts membranous, night latch; pedicels long perianth 2 ~ 4 times; perianth lobes basally slightly connate, 6, white, oblong-lanceolate, length 5 ~ 7mm; stamens 6; ovary three prism. Capsules obovate, with triangular. Seed 6, black. Florescence 7 to in August, fruit period 8 to September.