Eucalyptus limonensis leaves

lemon

(records of Guangxi Traditional Chinese Medicine)

[source] it is the leaf of Eucalyptus limonensis.

[plant morphology] Eucalyptus limonensis, also known as eucalyptus oleifera, Eucalyptus limonensis and Eucalyptus liuxiangjiu.

Trees, 10-30 m high. The bark is smooth, pale white or reddish gray, flaky off, very smooth and white after peeling. The leaves are lemon flavored; the abnormal leaves are thick, sometimes 30 cm long, 7.5 cm wide, and pale below; the leaves of young branches are covered with brownish red glandular hairs, and the petioles are shield shaped, 4-5 mm away from the leaf base; the normal leaves are alternate, ovate lanceolate or narrowly lanceolate, 10-20 cm long, slightly falcate. Umbelliform inflorescence, 3-5 flowers, several arranged into axillary or terminal panicles; flower diameter 1.5-2 cm; calyx tube cup-shaped, diameter 6-8 mm; cap hemispherical, shorter than calyx tube, 2 layers, outer layer slightly thick, with small convex tip, inner layer thin and smooth, rich in luster; stamens more, 8-10 mm long. Capsule ovoid pot shaped, about 1.2 cm long, thin fruit margin, deep petals. The flowering period is from December to May and from July to August (Guangdong).

It is cultivated in Guangdong, Fujian, Guangxi and Sichuan.

[collection] harvest on sunny days in autumn and dry in the shade.

[medicinal material] the dry leaves are oblong (young leaves) or ovate lanceolate (old leaves), yellow green. The young leaves and petioles have brown bristles, many cork spots, rough and strong aroma. The old leaves are smooth and glabrous, and the aroma is slightly inferior to that of the young leaves.

Produced in Guangxi, Guangdong and other places.

[chemical composition] it contains 0.5-2.0% volatile oil, among which the main components are aldehyde, citronellol, geraniol, isohu, 1,8-cineole and guaiacol. It also contains rutin, quercetin, quercetin, shikimic acid, quinic acid, glutaric acid, malic acid, citric acid and a kind of Eucalyptus. It may be a derivative of coumarin.

The gum obtained from this plant has the effect of anti gram positive bacteria, which contains six components: 7-methyl-orange ether, 7-methyl-phenol ether, benzoic acid, dimethyl-orange ether and Eucalyptus citric acid.

[pharmacological action] Eucalyptus citral has anti tuberculosis effect. Its 1:1 million concentration can inhibit the growth of Mycobacterium tuberculosis (H37Rv) with the same potency as isoniazid; 1:60 universal can inhibit the growth of Staphylococcus aureus; 1:6 universal can inhibit the growth of Mycobacterium. It can also inhibit some fungi, but has no effect on E. coli. The trunk of Eucalyptus maculata hook. Is a plant of the same genus. It has skin irritating components, and the gum produced by it has high astringency.

[nature and taste] "bitter, warm. "

[functions and indications] 1. In Nanning medical records: "Xiaozhong Sandu". Treat diarrhea and stomachache. It is used to treat skin and furuncle diseases. "

② "Treatment of dysentery". "

[usage and dosage] oral: decoction, 2-3 yuan. External use: wash with boiling water.

The above is the introduction of Eucalyptus lemonade leaf. Please pay attention to more pictures of traditional Chinese medicine.