White back, also called Sparrow.

An evergreen shrub with a height of about 100-150 cm. The old branches are gray-white, and the young branches and leaves are emerald green. Stem cylindrical, nodes slightly enlarged.

Leaves: Opposite, entire margin, pubescent on both sides, with obvious mid-costal veins on the back, pointed or blunt apex, crab-shaped base, and short petiole.

Cymes, attached to branch tips or leaf axils, with small bracts, five calyx lobes, strip-lanceolate, glandular hairs on both sides, lip-shaped corolla white, upper lip lanceolate, lower lip The lip is short and three-lobed, and the shape of the corolla looks like a white crane flying in the green background; there are 2 fertile stamens and two anther chambers.

The capsule is oblong and its fruiting rate is not high.

Extended information:

1. Distribution range: Originated from Yunnan in mainland China, the mountainous areas of Guangdong and Guangxi in South China, Southeast Asia and India.

2. Main value: medicinal use

3. Medicinal material shape:

The stem is straight and long. Cylindrical, lignified base, lavender, diameter 0.4-0.6cm.

The upper part of the stem is light yellowish-brown or green-brown, covered with white pubescence. Sometimes the remaining stipules can be seen in the lower part of the stem. The stem nodes are obvious, and the distance between the nodes is 2-2.5cm, and the longer it goes upward. Odd-pinnate compound leaves, slightly larger leaflets at the top, 3-4 pairs of leaflets below, obovate, obovate-elliptical or obovate-lanceolate, 1.5-5cm long, 1-2.5cm wide, with edges Dull serrations.

The leaves are gray-green, shriveled and curled. Sometimes you can see the inflorescences at the top of the stems and the small flowers or fruits with hooks. The taste is slightly bitter. The ones with purple-red stems, tender texture and many leaves are better.

Baidu Encyclopedia-Sparrow Sparrow