Commelina communis
Yazhicao
COMMELINAE HERBA
[properties] the product is 60cm long, yellowish green or yellowish white, and relatively smooth. Lotus has longitudinal edges, with a diameter of about 0.2cm, many branches or fibrous roots, slightly expanded nodes, and internode length of 3 ~ 9cm; it is soft, with pith in the center of the section. . The flowers are mostly falling off, and the involucre is spatulate, heart-shaped, and the two sides are not connected; Petals shrink, blue. The air is weak and the taste is light.
[identification] (1) the leaf surface of this product: there are two kinds of non glandular hairs, both of which are 2-cell, one is short tapered, 45-60 μ m long, with thick wall, the base cell diameter is about 45 μ m, and the top cell is short and pointed; The other is rod-shaped, with 45-60 μ m long basal cells, slightly thicker walls, longer apical cells, blunt rounded tips, thin walls, and often falling off. Calcium oxalate has many needle crystals with a length of 74 μ M.
(2) Take 0.5g of this product powder, add 25ml of ethanol, heat and reflux for 30 minutes, filter, evaporate the filtrate, add 2ml of ethanol to dissolve the residue as the test solution. Take 0.5g of Commelina communis reference medicinal material and make the reference medicinal material solution by the same method. According to the test of thin-layer chromatography (general rule 0502), suck 5 μ l of each of the above two solutions, dot them on the same silica gel G thin-layer plate respectively, use chloroform methanol water (5:1:0.05) as the developing agent, pre balance the thin-layer plate in the developing cylinder for 30 minutes, develop, take out, dry, and check under the ultraviolet light (365nm). In the chromatogram of the test sample, fluorescent spots of the same color appear at the corresponding position of the chromatogram of the control medicinal material; .
[inspection] the moisture content shall not exceed 12.0% (the second method of general rule 0832).
[extract] according to the hot leaching method under the determination method of water-soluble extract (general rule 2201), it shall not be less than 16.0%.
Decoction pieces
[processing] remove impurities, wash, segment and dry.
This product has irregular sections. . The cut center is myelinated. The leaves are alternate, mostly shrunken and broken, and the complete leaves are oval lanceolate or lanceolate after flattening. They are full-bodied, and the base extends downward into membranous leaf sheaths, holding stems, and the leaf veins are parallel. The involucre is spatulate and heart-shaped. The air is weak and the taste is light.
[identification], [inspection], [extract] are the same as that of medicinal materials.
[nature, taste and meridian tropism] sweet, light and cold. It belongs to the lung, stomach and small intestine.
[functions and indications] it can clear away heat and fire, detoxify, promote water and reduce swelling. It is used for cold and fever, fever and thirst, sore throat, edema and less urine, hot shower and pain, carbuncle, swelling and toxin.
[usage and dosage] 15 ～ 30g. Suitable for external use.
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2、 Chemical constituents of Commelina communis
The whole grass contains l-ryegrass lactone, unbound terpene,β - sitosterol,CaroteneandD-MannitolAnd n-triacontanol. . Petals contain anthocyanins, flavonoid glycosides of Commelina communis, mono acyl p-coumaroyl delphinidin of malonic acid, and daphnetin. Daphnetin is a composite molecule composed of mono acyl malonic p-coumaroyl delphinidin (m), flavonoid glycosides of Commelina communis (f), and magnesium atoms, which can be expressed as [(m) 6 (f) 6mg2]6.
3、 Pharmacological effects of Commelina communis l.var.communis l.var.communis l.var.communis l.var.communis l.var.communis l.var.communis l.var.communis l.var.communis
The water extract or Decoction of the stem and leaf of the same genus Commelina pallida can excite the uterus, constrict blood vessels, and shorten the coagulation time.