Introduction of Ma Chi Xian:Purslane Herb or Herba Portulacae.
✵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:Herbs Clearing Heat and Drying Dampness.
Introduction: Herbs Clearing Heat and Drying Dampness: an agent or substance bitter in taste and cold in property that is effective for eliminating heat and dampness, usually used in the treatment of diseases caused by damp-heat, such as acute jaundice, acute dysentery, urinary infection, eczema, boils and abscesses.
✵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 Herbs Clearing Heat and Drying Dampness are briefly introduced separately:
Herba Portulacae(Purslane Herb).
Pin Yin Name: Mǎ Chǐ Xiàn.
English Name: Purslane Herb.
Latin Name: Herba Portulacae.
Property and flavor: cold, sour.
Brief introduction: The Herb Herba Portulacae is the dried aerial part of Portulaca oleracea L.(family Portulacaceae), used for treating dysentery with bloody stools, and externally for boils and sores, eczema, erysipelas, and snake- and insect-bite. The herb is commonly known as Herba Portulacae, Purslane Herb, Mǎ Chǐ Xiàn.
Botanical source: The herb Herba Portulacae(Purslane Herb) is the dried aerial part of (1). Portulaca oleracea L., it is a plant of the Portulaca Genus, the Portulacaceae family of the Caryophyllales order. This commonly used species is introduced as:
(1).Portulaca oleracea L.: Botanical description: The Portulaca oleracea L., is a plant of the Portulacaceae family and Portulaca genus, it is commonly known as "Portulaca oleracea", "common purslane, verdolaga, red root, or pursley", or "Ma Chi Xian", annual fleshy herbs, whole plant smooth glabrous, 20~30 cm high. Stems cylindrical, supine or oblique up, scattered from the base, the sun often with light brown red or purple. Leaves are alternate or opposite, petiole very short, fat leaves fleshy, obovate or spatulate, 1~3 cm long, 5~14 mm wide, apex obtuse, sometimes emarginate, base broadly cuneate, entire, dark green at upper part, dark red at lower part. Flowers are bisexual, smaller, yellow, usually 3~5, clusters of axils of apical leaf; 4~5 involucral bracts, triangular-ovate; 2 sepals, opposite, ovate, base united with ovary; 5 petals, inverted heart-shaped, apex dimpled; 8~12 stamens, medicine yellow; 1 pistil, ovary semi-inferior, 1 room, style top 4~6 split to form a linear stigma. Capsule shortly conical, brown, capped; seeds numerous, dark brown, with a fine surface. Its flowering period is from May to September, fruiting from June to October.
Purslane is an annual, herbaceous plant, with branched, decumbent on fairly ascending stems of up to 50 cm, and which are reddish, fleshy and glabrous. The leaves measure 0.5 to 3.3 x 0.2 to 1.5 cm, are obovate, entire and fairly papillose. The flowers are yellow and solitary or in axillary groups of two or three. The fruit is in a capsule (pyxidium) of up to 7 mm. The seeds are 0.6 to 1 mm; they are reniform, black, and maintain their germinating capacity for eight to ten years. Of orthodox behavior in germination, their viability is maintained much more if they are stored dry at a low temperature.
Ecological environment: The plant grows in the fields, in the waste, by the roadside. The plant distributes all over the areas of China, and many other areas outside China.
Growth characteristics: The Portulaca oleracea prefers a warm and humid climate, strong adaptability, can withstand drought, it could be cultivated in the field of hills and general soil.
Characters of herbs: The dry whole herb wrinkled curl, often tangled into a group. Stem slender and twisted, ca. 15 cm long. The surface is yellowish-brown to greenish-brown with an obvious longitudinal furrow. Brittle, easily broken, broken face center yellow and white. Leaves wrinkled or crushed, dark green or dark brown. The top branches often oval capsule or its crack what residue, fruit contains most of the tiny seeds. The smell is weak and special, the taste is slightly sour and sticky. The small, tender, many leaves, green for the best.
Pharmacological actions: The decoction and alcohol extract of the Herba Portulacae have an inhibitory effect on dysentery bacillus, Escherichia coli, Staphylococcus aureus, and so on, especially has obvious inhibition on Bacillus dysenteriae. The water extract of the Herba Portulacae could shrink the rabbit aorta, weaken the contractility of myocardium and increase the blood pressure of rats. It can enhance the contraction of guinea pig ileum in vitro. It has a contractive effect on the uterus. Besides, it has a diuretic effect, to increase blood potassium level.
Medicinal efficacy: Clearing heat and remove dampness through diuresis, clearing heat and detoxification, cooling blood and detoxification, cooling blood and stopping dysentery, dispersing blood and detumescence(reduce swelling), eliminate dampness, and treating stranguria. It is indicated for bacillary dysentery, dysentery with bloody stool due to heat pathogen, heat dysentery with pus blood, acute gastroenteritis, acute appendicitis, mastitis, hemorrhoid bleeding, hemorrhoids, bloody stranguria, pyretic stranguria, hemafecia(bloody stool), uterine bleeding, urodialysis(suppression of urine), morbid leukorrhea, white leukorrhea, leukorrhea with reddish discharge, metrorrhagia and metrostaxis; Topical treatment for malignant boils, carbuncles, erysipelas, snake and insect bites, eczema, scrofula, acute eczema, herpes zoster, tinea tonsure, etc.
Administration of Herba Portulacae(Mǎ Chǐ Xiàn):
Administration Guide of Herba Portulacae(Mǎ Chǐ Xiàn)
Internally:9~15 grams, fresh herb 30~60 grams. Externally: proper amount, mashed and apply at affected area(CP), Internally: water decoction, 3~5 qian(about 9~15 grams), fresh herb 2~4 liang(about 6~12 grams), or extract the juice and drink. Externally: mashed and apply stick, charred the herb and grinded to a fine powder and apply stick, or wash with water decoction(DCTM), Internally: water decoction, 10~15 grams, fresh herb 30~60 grams, or extract the juice. Externally: proper amount, mashed and apply stick, charred the herb and grinded to fine powder and apply stick, or wash with water decoction(CHMM).
1.Introduction of Ma Chi Xian:Purslane Herb or Herba Portulacae.
2.TCM Books:DCTM(Dictionary of the Chinese Traditional Medicine),CHMM(Chinese Herbal Materia Medica).