Introduction of Ban Lan Gen:Isatis Root or Radix Isatidis.

TCM Herbalism:Medicinals and Classifications. ✵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 Counteracting Toxins.

 TCM Herbs Icon05 Introduction: Herbs Clearing Heat and Counteracting Toxins: an agent or substance herbs that counteracts heat toxins or fire toxins, mainly indicated in the treatment of boils, sores, abscess, erysipelas, epidemic infectious diseases, mumps, dysentery, insect or snake bite, and burns.

 
Radix Isatidis(Isatis Root).

Isatis Root:herb photo Pin Yin Name: Bǎn Lán Gēn.
 English Name: Isatis Root.
 Latin Name: Radix Isatidis.
 Property and flavor: cold, bitter.

 Brief introduction: The herb Radix Isatidis is the dried root of Isatis indigotica Fort.(family Cruciferae), used to clear heat, counteract toxins and cool the blood in the treatment of warm diseases with fever, headache and sore throat, eruptive epidemic diseases, mumps, boils, sores and erysipelas. The herb is commonly known as Radix Isatidis, Isatis Root, Bǎn Lán Gēn.

 Botanical source: The herb Radix Isatidis(Isatis Root) is the dried root of (1). Isatis indigotica Fort., it is a plant of the Isatis genus, the Brassicaceae family of the Brassicales order. This commonly used species is introduced as:

(1).Isatis tinctoria L.


 Isatis tinctoria L.:growing plant Botanical description: The Isatis tinctoria L. is a plant of the Cruciferae family and Isatis genus, commonly known as "Song Lan", biennial herb. Main root deep, diameter 5~8 mm, skin gray-yellow. Stem erect, high 40 to 90 cm. Leaves alternate; basal leaves larger, with handles, leaves oblong-elliptic; cauline leaves oblong to oblong-oblanceolate, lower leaves larger, gradually smaller, 3.5~11 cm long, 0.5 to 3 cm wide, apex obtuse, base arrow-shaped, semi-bivalve, entire or not obvious serrated. Calyx racemes: flowers small, 3 to 4 mm in diameter, Adaxially, slender; 4 calyx, green; 4 petals, yellow, obovate; 6 stamens, 4 strong; 1 pistil, oblong. Siliques oblong, winged, with midrib. 1 seed. It is flowering in May, fruiting in June.

 Isatis indigotica Fort.:growing shrub The Isatis indigotica Fort., is a plant of the Cruciferae family and Isatis genus, commonly known as "Cao Da Qing", it has small differences from the Isatis tinctoria L. the difference is that the leaf base of this species is auriculae, obtuse and concave top fruit, or full truncated. It is flowering in May, fruiting in June.

 Ecological environment: The plant grows in moist places on the edge of the mountain forest. Wild or cultivated. Resource distribution: The plant is native to China, now grows all over the country.

 Growth characteristics: The Isatis tinctoria prefers a wet warm environment, resistant to cold, afraid of waterlogging, should choose the field with good drainage, loose fertile sandy loam.

 Isatis Root:herb photo Characters of herbs: Root cylindrical, slightly twisted, 10~20 cm long, 0.5~1 cm in diameter. The surface is grayish-yellow or pale-brown, with longitudinal wrinkles and transverse lenticels, and branches or root marks; The root head is slightly enlarged, with a rotund arrangement of dark green or dark brown petiole residues, petiole marks, and dense verrucous projections. Solid, soft, broken face slightly flat, yellow and white skin, accounting for about 1/2 to 3/4 of the longitude, yellow wood. Light smell, taste mild sweet then bitter. Long, thick and solid are preferred.

 Pharmacological actions: ①.Antimicrobial effect: Radix Isatidis has an inhibitory effect on a variety of bacteria, and the aqueous infusing liquid has an inhibitory effect on Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Typhoid bacillus, Dysentery bacillus, Enteritis bacillus, and so on. ②.Anti-leptospirosis effect; ③.Detoxification.

 Medicinal efficacy: Clear heat, detoxification, cool blood, benefits throat. It is indicated for febrile virulent maculae, hyperthermia with headache, purplish dark tongue, swelling of the pharynx, mumps, pharyngitis, scarlet fever, erysipelas on the head, erysipelas,  carbuncles, sore swelling, influenza, epidemic encephalitis, encephalitis, pneumonia, pestilent maculae, coma and spitting blood, pinkeye, herpes, varicella, measles, purplish dark tongue, used for prevention and treatment of epidemic encephalitis B, acute and chronic hepatitis, epidemic mumps, influenza, osteomyelitis. 

 Administration of Radix Isatidis(Bǎn Lán Gēn): 
 
Reference: Administration Guide of Radix Isatidis(Bǎn Lán Gēn)
TCM Books: Internally:9~15 grams(CP),Internally:water decoction, 0.5~1 liang(about 15~30 grams)(DCTM),Internally:water decoction, 15~30 grams, big dosage could be 60~120 grams,or prepared to pill, powder.Externally:proper amount,fumigation wash with water decoction(CHMM).

 
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References:
  • 1.Introduction of Ban Lan Gen:Isatis Root or Radix Isatidis.
  • 2.TCM Books:DCTM(Dictionary of the Chinese Traditional Medicine),CHMM(Chinese Herbal Materia Medica).

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