Introduction of Chang Shan:Radix Dichroae or Antifeverile Dichroa Root.
✵The TCM herbalism is also known as pharmaceutics of Traditional Chinese Medicine, or Chinese pharmaceutics, is the branch of health science dealing with the preparation, dispensing, and proper utilization of Chinese herbs. It is majorly composed of Introduction of Chinese Medicinals, Classification of Chinese Herbs, Formulas, and Patent medicines.
Classifications of Herbs:Pungent-cool Exterior-releasing Herbs.
Introduction: Pungent-cool exterior-releasing herbs: an agent or substance herbs pungent in flavor and cool in property, which is usually used for treating a wind-heat exterior syndrome.
✵Till the date Oct 10th,2019, there are totally  kinds of common TCM herbs,  kinds of related plant species,  kind of insect species, are recorded in this category. These pungent-cool exterior-releasing herbs are briefly introduced separately:
Radix Dichroae(Antifeverile Dichroa Root).
Pin Yin Name: Chánɡ Shān.
English Name: Antifeverile Dichroa Root.
Latin Name: Radix Dichroae.
Property and flavor: cold, pungent, bitter, toxic.
Brief introduction: The herb Radix Dichroae is the dried root of Dichroa febrifuga Lour.(family Saxifragaceae), used for the treatment of malaria.
Botanical source: The herb Radix Dichroae(Antifeverile Dichroa Root) is the dried root of Dichroa febrifuga Lour., it is a plant of the Dichroa L. genus, the Saxifragaceae family of the Rose order. It is also known as Radix Dichroae, Antifeverile Dichroa Root, Chánɡ Shān.
Common official herbal classics and other famous herbal classics defined the herb Radix Dichroae(Antifeverile Dichroa Root) as the dried root of (1). Dichroa febrifuga Lour. This commonly used species is introduced as:
(1).Dichroa febrifuga Lour.: Botanical description: It is commonly known as Antifeverile Dichroa. Shrubby plant, 1~2 meters high. Branchlets are green, often purplish, glabrous, or thinly puberulent. Leaves opposite; Petiole length 1.5~2 cm; Leaves vary widely, usually elliptic, oblong, obovate-elliptic, sparse lanceolate, 5~10 cm long, 3~6 cm wide, apex acuminate, base cuneate, margin densely serrate or serrate; The middle veins are concave above, and the side veins arch upward. Corymbals conical; Terminal, stem; Flowers blue or bluish-purple; Calyx obconical, 4~7 calyx teeth; 4~7 petals, subsucculent, reflexed; 10~20 stamens, half opposite petals, filaments flattened; Ovary inferior, 4~6 styles, initial base connate. Berry is blue, with many seeds. Its flowering period is from June to July, fruiting from August to October.
Ecological environment: the plant grows on forest margins, gully sides, moist mountain areas at altitudes of 500~1,200 meters above sea level. Resource distribution: the plant distributes in the Zhujiang river area, northwest, southwest, the middle and lower reaches areas of the Yangtze River, Taiwan, and other areas of China.
Growth characteristics: The plant prefers a cool and humid climate, to avoid high temperature. It is better to be cultivated in fecund loose, good drainage, sandy loam with much humus. The plant grows at the forest edge, gully edge, humid mountain, or cultivated under the forest at altitudes of 500-1200 meters above sea level. It distributes in the middle and lower reaches of the Yangtze River, southwest, the Zhujiang River basin.
Characters of herbs: dry root is cylindrical, often divergent, torsional, 9~15 cm long, about 0.5~2 cm in diameter. The surface is yellowish-brown with obvious fine longitudinal lines and root traces. The cork is easy to peel off, showing pale yellow xylem. It is hard, and when it breaks, it flies away. Yellow-white cross-section, water-wet visible obvious white-like rays, radial arrangement. Rhizomes are cylindrical and submassive. The cross-section is identical to that of the root except for the central medulla. Weak smells, bitter taste. With qualitative firm and heavy, the shape is like a chicken bone, the surface and section are flaxen, smooth is better in quality, the root which is thick and long straight, qualitative pine, color is dark yellow, without bitter taste cannot be used as herbal medicine.
Pharmacological actions: The decoction of Radix Dichroae and its active components, dichroine, etc., have anti-malarial, anti-amoeba, anti-leptospira, antipyretic, the effect on the cardiovascular system, smooth muscle, inducing vomiting, antiviral and anti-tumor effects.
Medicinal efficacy: Preventing attack or recurrence of malaria, relieving phlegm. Indicated for malaria.
Administration of Radix Dichroae(Chánɡ Shān):
Administration Guide of Radix Dichroae(Chánɡ Shān)
Internally:5~9 grams(CP), or water decoction, 1~3 qian(about 3~9 grams), or prepare to pill, powder(DCTM), or water decoction,5~10 grams, or prepare to pill, powder(CHMM). Those with weak healthy Qi, chronic disease and weak physical conditions should avoid using.
1.Introduction of Chang Shan:Radix Dichroae or Antifeverile Dichroa Root.
2.TCM Books:DCTM(Dictionary of the Chinese Traditional Medicine),CHMM(Chinese Herbal Materia Medica).