The original plant of Perilla frutescens is an annual erect herb, and its height exceeds 1 m. Stems green or purple, square column, with 4 blunt edges, villous. Leaves opposite, herbaceous, broadly ovoid or nearly round, 7 ~ 13cm long and 4.5 ~ 10cm wide, short or sharp at the top, wide wedge-shaped to round at the base, with tear-like coarse serrations on the edge, purple on both sides or purple on the lower side, with fluff on the upper side and fluff on the lower side; The petiole is 3 ~ 5 cm long. Autumn flowers, purplish red, axillary arrangement, dense, lateral racemes; Bracts broadly ovate or suborbicular, ca. 4 mm long, with reddish-brown glandular spots, glabrous; Calyx bell-shaped, straight, about 3 mm long, with veins 1O, villous and glandular points. Calyx brim has two lips, the upper lip is 3-cleft, the middle cleft is smaller, and the lower lip is 2-cleft, which is longer than the upper lip. Corolla 3 ~ 4 mm long. The crown tube is short, the throat is nearly bell-shaped, the brim of the hat is nearly two-lipped, the upper lip is slightly missing, and the lower lip is 3-cleft, with a large middle fissure. Stamens 4. Almost as high as the corolla lobes. The calyx is obviously enlarged, long 1. 1 cm, flat or drooping, and the base side is enlarged. Nutlets are spherical, with a diameter of 65438 0.5 mm, brown and reticulate.
Perilla frutescens is a kind of millet with special fragrance. Its stem is erect, with four edges, 50-200 cm high, multi-branched, densely villous, green or purple. The leaves are opposite, ovate or broadly ovate, with serrated edges and sharp tips. Both sides of the leaf are green or purple, or the leaf is green and the back is purple. Petiole 3 ~ 5 cm long, densely villous; A cyme has two flowers, white, pink to purple, forming a terminal and axillary pseudoraceme. Bracts ovate, entire. Calyx bell-shaped, upper lip 3-lobed, wide, lower lip 2-lobed. Corolla tubular, apex 2-lipped, upper lip 2-cleft and emarginate, lower lip 3-cleft. Stamens 4, ovary 4-lobed, style attached to the base of ovary. Nutlets are ovoid or spherical, grayish white, grayish brown to dark brown, and the 1000-grain weight is 0.8 ~1.8g. ..