Main value of Lagerstroemia speciosa

The bark and leaves of Lagerstroemia speciosa can be used as laxatives; Seeds are narcotic; Roots contain tannic acid and can be used as an astringent.

Pharmacology: By observing the effects of various plant extracts on oral glucose uptake of Ehrlich ascites cancer cells, it is found that Lagerstroemia speciosa is one of the plants that promote glucose uptake. Two triterpenoids, colesulfonic acid and masri acid, were isolated. The former is the promoter of glucose transport, so it has hypoglycemic activity.

Medicinal parts: roots and flowers are used as medicine.

Harvesting and processing: roots: harvested in autumn and winter, washed, sliced and dried. Leaves: Picked and dried in summer and autumn.

Function: heal sore and detoxify, cool blood and stop bleeding; Roots are used for carbuncle, sore and swelling; Bark and leaves are used as laxatives; Seeds have an anesthetic effect. Lagerstroemia speciosa leaves have hypoglycemic, antioxidant and antifungal activities, and its main activity is hypoglycemic activity.

External use: appropriate amount, tamping; Or grinding and smearing; Or fried and washed. It has hypoglycemic, antioxidant and antifungal activities, and its main activity is hypoglycemic activity.

Indications: carbuncle swelling and toxin. External use: appropriate amount, tamping; Or grinding and smearing; Or fried and washed.

Chemical constituents: 10 compounds were isolated from the petroleum ether part of Lagerstroemia speciosa leaves by silica gel and Sephadex LH-20 column chromatography. They are: ① ursolic acid, ②2α- hydroxyursolic acid, ③2α- hydroxybetulinic acid, ④ Asiatic acid, ⑤-sitosterol, ⑦-dodecanol, ⑦-carotene, ⑧-dandelion sterol acetate, ⑨-sitosterol acetate and ⑩(2α, 3β)- ursolic acid-/kloc. Bright colors and long flowering period. Can be planted in various gardens and green spaces. It can also be used for street greening and potted viewing.

Flowers are large and beautiful, and gardens are often cultivated and ornamental; Wood is hard, corrosion-resistant and bright red.