Introduction of Man Shan Hong:Dahurian Rhododendron Leaf or Folium rhododendri Daurici.

TCM Herbalism:Medicinals and Classifications. ✵The article gives records of the herb Dahurian Rhododendron Leaf, its English name, Latin name, property and flavor, its botanical source one plant species, ①.Rhododendron dauricum L., with a detailed introduction to the botanical features of this plant species, the growth characteristics, and ecological environment of this plant species, the features of the herb Dahurian Rhododendron Leaf, its pharmacological actions, medicinal efficacy, and administration guide.

Folium rhododendri Daurici(Dahurian Rhododendron Leaf).

Rhododendron dauricum:flowering plant Pin Yin Name: Mǎn Shān Hónɡ.
 English Name: Dahurian Rhododendron Leaf.
 Latin Name: Folium rhododendri Daurici.
 Property and flavor: warm, pungent, bitter.

 Brief introduction: The herb Folium rhododendri Daurici is the dried leaf of Rhododendron dauricum L.(Family Ericaceae), used as an antitussive and expectorant for acute and chronic bronchitis.

 Botanical source: The herb Folium rhododendri Daurici (Dahurian Rhododendron Leaf) is the dried leaf of Rhododendron dauricum L., it is a plant of Rhododendron L. genus, the Ericaceae family (heath family) of the Ericales order. It is also known as Folium Rhododendri daurici, or Mǎn Shān Hónɡ.

 Rhododendron dauricum L.:flowers Herbal classic book defined the herb Folium rhododendri Daurici (Dahurian Rhododendron Leaf) as the dried leaf of:(1). Rhododendron dauricum L. This commonly used species is introduced:

(1).Rhododendron dauricum L.

 Botanical description: Rhododendron dauricum L. is commonly known as Xīng ān Dù Juān. Semi-evergreen shrubs, the plant grows up to 1~2 meters high. The bark is pale grey. Much branched, branchlets are slender and curved, dark gray, scaly, and pilose. Buds are ovate, scales are broadly ovate. Leaves are alternate; Petiole is 2~5 mm long, slightly hairy; Leaf blade is more or less leathery, clustered on the upper part of branchlets, elliptic or ovoid oblong, 1~7 cm long, 1~3 cm wide, the apex is obtuse, shortly pointed, the base is cuneate, entire-edge, the upper surface is dark green, scattered white glandular scales, the under surface is light green, densely covered by glandular scales. In winter, it rolled to a tube-shape and has an aroma after kneading. Flowers 1~4 grow apically, bloom before leaves, pink or purplish-red; Sepals are short, lobed, the out surface is densely scaly; Corolla is funnelform, about 1.8 cm long, 5-lobed, the out surface is pilose; 10 stamens, the corolla is protruding, filaments base is pilose; Ovary 1, ovary wall is densely covered with glandular scales, style is longer than petals, persistent. Capsularfruit is oblong, about 1.2 cm long, apex is cracked. Its flowering period is from May to June, the fruiting period is from July to August.

 Rhododendron dauricum L.:flowering plant 01 Ecological environment: The plant grows on mountain ridges, hillsides, and acid soils under forests. It is mainly distributed in the north, middle north, and other areas of China.

 Growth characteristics: The shrub is adaptable, it is better to cultivate in acidic or neutral sandy loam or clay loam. Better not to choose alkaline loam for cultivation.

 Characters of herbs: Most of the leaves are back-scrolling into tube-shape, and some of them are shriveled and broken. After flattening, the intact leaves are oblong or long obovate, 2~7.5 cm long, and 1~3 cm wide, the apex is obtuse, the base is orbicular or broadly cuneate, entire-edge, the upper surface is dark green to brown-green, light yellowish glandular scales scattered, the under surface is grayish green, many glandular scales, main veins protruding on the under surface, there are 4~6 pairs of lateral veins. The petiole is 3~10 mm long. The leaves are nearly leathery. The leaf has a specific fragrance, and tastes slightly bitter and slightly pungent. The herb of better grade has intact leaves and dark green.

 Pharmacological actions: ①.Antitussive and antiasthmatic effects; ②.Anti-inflammatory and bacteriostasic activity; ③.Antihypertensive effect and diuretic effect; ④.The analgesic action; ⑤.Central inhibition effects; ⑥.Effects on tissue respiration.

 Medicinal efficacy: The herb relieves cough and eliminating phlegm. It is indicated for acute and chronic bronchitis, cough.

 Administration of Folium rhododendri Daurici (Mǎn Shān Hónɡ): 
Reference: Administration Guide of Folium rhododendri Daurici (Mǎn Shān Hónɡ)
TCM Books: ①.Internally:25~50 grams fresh herb, water decoction, or 6~12 grams, infused in 40% alcohol and take; ②.fresh herbs 0.5~1 liang (about 15~30 grams), water decoction; ③.15~30 grams (fresh herb), water decoction, or infusing in wine and take.

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