Contents 1 Pinyin 2 English reference 3 Pharmacopoeia standards 3.1 Chinese medicine name 3.2 Pinyin name 3.3 English name 3.4 Source 3.5 Properties 3.6 Identification 3.7 Preparation 3.8 Nature, flavor and meridians 3.9 Functions and indications 3.10 Usage and dosage 3.11 Storage 1 Pinyin

biǎn xù 2 English reference

knotgrass

Bian Zhu

Bian Zhu

Herba Polygoni Avicularis

(English) mon Knotgrass Herb

Also known as flat bamboo, bamboo grass, polygonum, and ant grass.

Source: It is the above-ground part of Polygonum aviculare L., a plant in the family Polygonaceae.

Plant form: Annual herb, 10-40cm tall, often with white powder; stems are clustered, creeping or ascending, green, grooved, leaves are meridian, linear to lanceolate, 1-4cm long, wide 6~10cm, apex is blunt or acute, base is wedge-shaped, nearly sessile; stipule sheath is membranous, lower part is brown, upper part is white and transparent, with obvious veins. There are 1 to 5 flowers in clusters in the leaf axils, with the stipules exposed. The pedicels are short and jointed at the base; the perianth is 5-deeply lobed, the lobes are oval, dark green, with white or light red edges; 8 stamens; the style is 3-lobed. Achenes are oval, more than 2mm long, with ribbed surface, brown or black, and small inconspicuous dots. The flowering and fruiting period is from May to October.

Born in fields and roadsides. Produced in most parts of the country.

Harvesting in summer, remove roots and impurities, and dry in the sun.

Chemical composition: Contains avicularin, quercetin, caffeic acid, chlorogenic acid, p-coumaric acid, oxalic acid, d-catechol, etc.

Nature and flavor: Slightly cold in nature and bitter in taste.

Functions and Indications: Diuresis, treating stranguria, killing insects, and relieving itching. It is used for hot stranguria in the bladder, short and red urine, astringent and painful stranguria, skin eczema, and vaginal itching. 3 Pharmacopoeia standards 3.1 Chinese medicine name

Bianxu 3.2 Pinyin name

Bianxu 3.3 English name

HERBA POLYGONI AVICULARIS 3.4 Source

This product It is the dry above-ground part of Polygonum aviculare L., a plant in the Polygonaceae family.

Harvest in summer when the leaves are lush, remove roots and impurities, and dry in the sun. 3.5 Characteristics

The stem of this product is cylindrical and slightly flat, with branches, 15-40cm long and 0.2-0.3cm in diameter.

The surface is grey-green or brown-red, with fine and slightly raised vertical lines; the nodes are slightly enlarged, with light brown membranous stipules, and the internodes are about 3cm long; hard, easy to break, and the cross-section of the medullary Part white.

The leaves are alternate, nearly sessile or with short stalks. The leaves are often shed or shriveled or broken. The intact ones are lanceolate after being flattened, with entire edges, and both sides are brown-green or gray-green.

Odorless, slightly bitter taste. 3.6 Identification

(1) The powder of this product is gray-green.

The vertical walls of the upper and lower epidermal cells of the leaves are nearly straight, and the flat peripheral walls have horny lines.

The main stomata are inequalities and there are 3 accessory cells.

The cross-section of the mesophyll is like a fence on two sides, and the thin-walled cells contain calcium oxalate clusters with a diameter of 18 to 43 μm.

(2) Take 5g of this product powder, add 100ml of 70% ethanol, 5ml of hydrochloric acid, reflux and extract for 3 hours, filter, and the filtrate is used as the test solution.

Take another quercetin reference substance and add ethanol to make a solution containing 0.5mg per 1ml as the reference substance solution.

According to the thin layer chromatography (Appendix VI B) test, take 5 μl of the test solution and 1 μl of the reference solution, and place them on the same silica gel H thin film with sodium carboxymethylcellulose as the binder. On the laminate, use toluene-ethyl acetate-formic acid (5:2:1) as the developing agent, unfold, take out, dry, spray 1% aluminum trichloride ethanol solution, and inspect under ultraviolet light (365nm).

In the chromatogram of the test product, the same fluorescent spots appear at the corresponding positions of the chromatogram of the reference substance. 3.7 Processing

Remove impurities, wash, cut into sections, and dry. 3.8 Nature, flavor and meridians

Bitter, slightly cold.

Returns to the bladder meridian. 3.9 Functions and Indications

Diuretic, relieve stranguria, kill insects, and relieve itching.

Used for hot stranguria in the bladder, short red urine, astringent and painful stranguria, skin eczema, and vaginal itching. 3.10 Usage and dosage

9~15g; appropriate amount for external use, decoct and wash the affected area. 3.11 Storage