Burdock is a plant of the genus Burdock in the family Asteraceae.

Burdock (scientific name: Arctium lappa L.), also known as: evil real, Dali Zi.

Grouped in the order of orris, Asteraceae biennial herb, basal leaves broadly ovate, up to 30 centimeters long, up to 21 centimeters wide, the head of the inflorescences mostly or a few in into corymbs or paniculate corymbs.

Achenes obovate or oblique obovate, compressed on both sides, light brown. Flowering and fruiting period June-September. It is mainly found in China, Kashmir, and Europe.

A biennial herb with a thick fleshy taproot up to 15 cm long and up to 2 cm in diameter, with branched branching roots. Stem erect, up to 2 m tall, stout, base up to 2 cm in diameter, usually purplish or pale purplish red.

Numerous elevated ribs, branches obliquely ascending, numerous, all stem branches sparsely papillate short hairs and long arachnid hairs intermixed with small brownish-yellow glandular dots. Basal leaves broadly ovate, to 30 centimeters long, to 21 centimeters wide, margin sparsely shallowly undulate concavely toothed or toothed, base cordate.

Growth habit of burdock:

Burdock prefers warm climatic conditions, both heat and cold. Seed germination temperature 20 ~ 25 ℃, plant growth temperature 20 ~ 25 ℃, the ground part of the cold resistance is weak, meet 3 ℃ low-temperature die, the taproot cold resistance is strong, can withstand -20 ℃ low temperature, the ground died in winter to the taproot overwintering, the next spring sprouting growth.

The burdock is a long day plant, requiring strong light conditions. Burdock is a plant that requires more water. From seed germination to seedling growth, suitable for slightly higher soil humidity; growth in the later stages also requires more moist soil conditions, but the field can not be waterlogged, if waterlogged 12h in the summer, the taproot will rot.