Introduction of Bai Jie Zi:White Mustard Seed or Semen Sinapis Albae.
✵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:expectorants,herbs for resolving cold-phlegm.
Introduction: Expectorants,herbs for resolving cold-phlegm: an agent or substance herbs warm in property, used in treating disorders of cold-phlegm or phlegm-dampness.
✵Till the date Oct 10th,2019, there are totally  kinds of common TCM herbs,  kinds of related plant species, are recorded in this category. These expectorants, herbs for resolving cold-phlegm are briefly introduced separately:
Semen Sinapis Albae(White Mustard Seed).
Pin Yin Name: Bái Jiè Zǐ.
English Name: White Mustard Seed.
Latin Name: Semen Sinapis Albae.
Property and flavor: warm, pungent.
Brief introduction: The herb Semen Sinapis Albae is the ripe seed of Brassica alba(L.) Boiss.(family Cruciferae), used to warm the lung and resolve phlegm for treating a cough with profuse expectoration and stuffy feeling in the chest, and also for treating the cold abscess and pleural fluid retention. The herb is commonly known as Semen Sinapis Albae, White Mustard Seed, Bái Jiè Zǐ.
Botanical source: The herb Semen Sinapis Albae(White Mustard Seed) is the ripe seed of Brassica alba(L.) Boiss., it is a plant of Sinapis L. genus, the Cruciferae family of the Rhoeadales order.
Common official herbal classics and other famous herbal classics defined the herb Semen Sinapis Albae(White Mustard Seed) as the ripe seed of:(1). Sinapis alba L., This commonly used species is introduced as:
(1).Sinapis alba L.: Botanical description: Annual or biennial, 40~120 cm tall. Stem erect, longitudinally branched, upper part much-branched, scattered with white stiff hairs. Leaves alternate. Thin, stipitate; Leaf blade large head at the base of stem lobed or sublobed, broadly elliptic or ovoid, 6~15 cm long, 2~3 cm wide, apex lobes large. Lateral lobes 1~3 pairs, margin sparsely toothed; Cauline leaves smaller, with short stipitate, ascending lobes fewer. Racemes terminal or axillary; 4 small sepals, green, erect, lanceolate or oblong. Base clawed; 4 stamens, 4 long, 2 short, long stamens 8.5~9.5 mm, short stamens 6~6.5 mm. 1 pistil, ovary long columnar, 9~10 mm long, densely covered with white tufts. Sinew cylindric 2~2.5 cm long, densely covered with white stiff bristles, fruit petals constricted between seeds into rosary beads, sinew apex with a flattened sword-shaped beak. Seeds subglobose, yellowish. Its flowering period is from April to June, fruiting from May to July.
Ecological environment: the plant is native to Europe. It also grows in the lower reaches area of the Yangtze River, the northwest, southwest areas of China.
Growth characteristics: Sandy loam with good drainage is preferred.
Characters of herbs: seed nearly spherical, 2~2.5 mm in diameter. The surface is yellowish-white, smooth, under a magnifying glass, with fine reticulations, one end with a round pale brown navel, swollen in water, 2 thick cotyledons, oily, folded longitudinally, radicle enveloping. Smells light, spicy taste, crushed wet, there is a special spicy and strong odor. It is better to have large, full, yellow, white and pure grain.
Pharmacological actions: ①.Antibacterial effect: The benzyl isothiocyanate contained in the Semen Sinapis Albae has a broad-spectrum antibacterial effect on yeast, 20 kinds of fungi, and dozens of other strains. The effective antibacterial concentration against gram-negative or gram-positive bacteria is 1:10(2)-3×10(2). The aqueous extract of white mustard seed has a different degree of antifungal effect to Achorion violaceum and Achorion schoenleinii in a test tube. Sialbin hydrolyzes to produce glucosinolates which also have bactericidal action. ②.White Mustard Seed has the stimulation effect: after the sialbin meets the water, through the myrosinase action produces the volatile oil, the main component is the allyl isothiocyanide, has the pungent taste and the stimulation effect. Applied to the skin to give it a warm feeling and redness, even causing blisters and pustules. ③.White mustard seed also has anti-lipid peroxidation, expectorant, regulating blood pressure effect.
Medicinal efficacy: Benefit Qi and reduce phlegm, warm the middle and dissipate cold, free channel and analgesia, indicated for the treatment of cold phlegm and asthma cough, chest fullness and pain in hypochondria, phlegm stagnation meridians, joint numbness, etc.
Administration of Cassia Twig(Guì Zhī):
Administration Guide of Cassia Twig(Gui Zhi)
Internally:3~9 grams(CP), or 1~3 qian(about 3~9 grams,DCTM), or 3~10 grams(CHMM), water decoction; grinded to fine powder and prepared to pills, powder.Externally:proper amount, grinded to fine powder and apply stick.
1.Introduction of Bai Jie Zi:White Mustard Seed or Semen Sinapis Albae.
2.TCM Books:DCTM(Dictionary of the Chinese Traditional Medicine),CHMM(Chinese Herbal Materia Medica).