1, perennial herb, 30 ~ 80 cm high. The root is slender, cylindrical and the skin is vermilion. The stem is quadrangular and branched at the upper part. Leaves opposite; Singular pinnate compound leaves with 3 ~ 5 leaflets.

2. The apical lobule is larger than the lateral lobule, and the lobule is ovoid. The inflorescence is axillary, with lip-shaped, blue-purple, upright upper lip and shorter lower lip. Nutlets are oblong and dark brown or black when ripe. The flowering period is May ~1October, and the fruiting period is June ~11month.

3. Tubers are oval to oblong, brown, and most slender fibrous roots are densely distributed on the surface.

4. Simple leaves alternate; Petiole is slightly shorter than leaf; Leaf blade broadly ovoid-cordate or ovoid-cordate, 5? 16 cm, 2 ~ 14 cm wide, with a tail-shaped tapering at the apex, an entire edge or a microwave shape, and no hair on both sides; There are purplish brown spherical or oval beads (Reiyoshi) in the axils of leaves, with a straight diameter of1~ 3cm and round spots outside.

5. Flowers are unisexual and dioecious; Male inflorescences droop like spikes, with a constant number clustered in leaf axils, and sometimes the basal inflorescences are extended and arranged in a conical shape; Male flowers are solitary and dense, with 2 ovate bracts at the base; Tepals lanceolate, purple when fresh; There are 6 stamens, which are inserted at the base of perianth, and the filaments and anthers are almost the same length.

Extended data:

I. Characteristics of medicinal materials

1, the rhizome of this product is short and thick, and sometimes the stem base remains at the top. The roots are several, long and cylindrical, slightly curved, and some are branched and have fine whiskers, with a length of10 ~ 20 cm and a diameter of 0.3～lcm. The surface is brownish red or dark brownish red, rough and with longitudinal wrinkles.

2, the old root skin is loose, mostly purple-brown, often scaly. It is hard and brittle, with loose cross section, cracks or slightly flat and dense, with reddish brown skin, grayish yellow or purplish brown wood, and yellow-white catheter bundles arranged radially. Slight gas, slightly bitter taste.

3. The cultivated products are stout, with a diameter of 0.5 ~1.5 cm. The surface is reddish brown, with longitudinal wrinkles, and the skin is close to it and not easy to peel off. Solid quality, flat section, slightly horny.

Second, the characteristics of decoction pieces

1, Salvia Miltiorrhiza: a thick tablet with a quasi-circular or oval shape. The outer skin is brownish red or dark brownish red, rough and longitudinally wrinkled. The section is cracked or slightly flat and dense, some are horny, the skin is reddish brown, the wood is grayish yellow or purplish brown, and there is a yellow-white radial texture. Slight gas, slightly bitter taste.

2, wine Danshen: shaped like Danshen tablets, the surface is reddish brown, slightly with wine aroma.

References:

Salvia miltiorrhiza (traditional Chinese medicine) _ Baidu Encyclopedia