1、 Pharmacopoeia standard of light bamboo leaf This product is the dried stems and leaves of lophatherum gracile brongn., a gramineous plant. In summer, the flowers are cut before heading and dried in the sun.
[character] the product is 25 ～ 75cm long. The stem is cylindrical, with knots, light yellow green surface and hollow section. Leaf sheath dehiscence. The leaves are lanceolate, some of them are wrinkled and curled, 5 ～ 20cm long and 1 ～ 3.5cm wide; the surface is light green or yellowish green. The leaf veins are parallel, with transverse venules, forming a rectangular grid shape, especially on the lower surface. It is light and flexible. The air is weak and the taste is light.
[identification] the leaf surface of this product: the upper epidermal cells are rectangular or square like, the vertical circumferential wall is wavy and curved, and circular palisade cells can be seen under it. The long cells and short cells in the lower epidermis are alternately arranged or several connected, and the long cells are rectangular with wavy vertical walls; The short cells were dumbbell shaped siliceous cells and square like embolic cells, and the short cells formed a string at the leaf vein; There are many stomata, guard cells are dumbbell shaped, accessory guard cells are nearly round triangular, and there are three kinds of non glandular hairs: one is single-cell long non glandular hairs; One is a single-cell short non glandular hair, which is short conical; .
[inspection] the moisture content shall not exceed 13.0% (the second method of general rule 0832).
The total ash content shall not exceed 11.0% (general rule 2302).
Decoction pieces
[processing] remove impurities and cut into sections.
[identification] [inspection] is the same as that of medicinal materials.
[nature, taste and meridian tropism] sweet, light and cold. Homing, stomach and small intestine channels.
[functions and indications] it can clear away heat and fire, relieve vexation and thirst, diuresis and relieve gonorrhea. It is used for fever, thirst, short, red, astringent and painful urination, and sore mouth and tongue.
[usage and dosage] 6 ～ 10g.
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2、 Chemical constituents of Phyllostachys praecox leaves

Stems and leaves contain triterpenoids:Rutin, imperatorin,Taraxacinol, uninhibited terpene.

3、 Pharmacological effects of Phyllostachys praecox leaves

. For cats and rabbits with fever caused by Escherichia coli, the antipyretic potency of 2G / kg bamboo leaf is about 0.83 times that of 33mg / kg phenacetin.

2. diuretic effect: normal people try to take 10g of this product. The diuretic effect is weak, but it can increase the excretion of chloride in urine. Its diuretic effect is weaker than that of Mutong and Polyporus umbellatus, but its excretion of chloride in urine is stronger than that of Polyporus umbellatus.

3. other effects: the water decoction of this product has inhibitory effect on Staphylococcus aureus and hemolytic streptococcus in vitro test. The crude extract of 100g (crude drug) / kg of this product has an inhibitory rate of 43.1-45.6% on sarcoma S-180, but it has no inhibitory effect on cervical cancer-14 and lymphosarcoma-1 ascites type. This product also has the effect of increasing blood glucose.