Lonicera japonica Thunb. (Caprifoliaceae)
Japanese Honeysuckle, Jin Yin Hua
Lonicera japonica Thunb. is a climbing shrub having tomen-tose young leaves and stems. Leaves are simple, opposite and exstipulate. Blade is elliptic, 3-8 cm by 2-3 cm, truncate at base, obtuse and chartaceous. Flowers are axillary, white, and turns yellow upon maturity. Fruits are globose and black.
A native of East Asia, widely cultivated and naturalised throughout the world.
Linalool, luteolin, geraniol, aromadendrene, eugenol, loniceroside A, B, C, L-phenylalaninosecologanin, (Z)-aldosecologanin, (E)-aldosecologanin and others.
Traditional Medicinal Uses
In China, the flowers are used for influenza, boils and carbuncle. In Malaysia, decoctions of dried flowers are used for cooling, flu, fever, headache, and boils. Distilled flowers are used to produce a medicine for treating postprandial stomachaches. Flower tea is prescribed to treat fever, sore throat, mouth sores, headache, conjunctivitis, keratitis, corneal ulcers, breast infections, muscle and joint pain, stomach problems, diarrhoea, and painful urination. They are used in the treatment of arthritis and inflammation. Flower buds are used in infusions for cutaneous infections, scabies, as diuretic and treat bacterial infection. Decoction is used for bacterial dysentery, cold, enteritis, infected boils, laryngitis, lymphadentitis, rheumatism and sores. The flowers and stems are regarded as cooling and are used to treat aching bones and boils. Other uses include intestinal inflammation, stomach ulcers, painful haemorrhoids, sore throats and intoxication.
In China, 10-60 g of dried floral buds are used for decoction. A combination of 10 g of honeysuckle, 10 g of forsythia, a little mint and bamboo leaf is a prescription for a bad cold from a drugstore in China. About 9-15 g dried flowers has been used in decoction, pills, powder or poultice of the powder. The recommended daily dose is 4 to 8 g of flowers or 10 to 20 g of stems and leaves in the form of a decoction, infusion, extract or alcoholic maceration for the treatment of boils, impetigo, urticaria, allergic rhinitis, fever, malaria, erythema, measles, diarrhoea, dysentery, syphilis, rheumatism and lichen tropicus. For carbuncles, boils, erysipelas, acute dysentery, pharyngitis, upper respiratory infection and epidemic febrile diseases, 6-15 g of dried flowers are used.
Linear, itchy, raised blisters on the skin may occur on contact.
No sign of acute and subacute toxicity was observed.
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