Introduction of Ku Shen:Light-yellow Sophora Root or Radix Sophorae Flavescentis.

TCM Herbalism:Medicinals and Classifications. ✵The article gives records of the herb Light-yellow Sophora Root, its English name, Latin name, property and flavor, its botanical source one plant species, ①.Sophora flavescens Ait., 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 Light-yellow Sophora Root, its pharmacological actions, medicinal efficacy, and administration guide.

Radix Sophorae Flavescentis(Light-yellow Sophora Root).

Light-yellow Sophora Root:herb photo Pin Yin Name: Kǔ Shēn.
 English Name: Light-yellow Sophora Root.
 Latin Name: Radix Sophorae Flavescentis.
 Property and flavor: cold, bitter.

 Brief introduction: The Herb Radix Sophorae Flavescentis is the dried root of Sophora flavescens Ait. (family Leguminosae), used to clear heat, dry dampness, kill parasitic worms and induce diuresis for treating acute dysentery, jaundice, morbid leukorrhoea, and externally for eczema and scabies. The herb is commonly known as Radix Sophorae Flavescentis, Light-yellow Sophora Root, Kǔ Shēn.

 Botanical source: The herb Radix Sophorae Flavescentis(Light-yellow Sophora Root) is the dried root of Sophora flavescens Ait., it is a plant of the Sophora Genus, the Fabaceae(Leguminosae) family of the Fabales order.

(1).Sophora flavescens Ait.

 Sophora flavescens Ait.:growing plant Botanical description: The Sophora flavescens Ait., is a plant of the Leguminosae(bean or pea family) family and Sophora genus, it is commonly known as "Sophora flavescens", "Light yellow Sophora", or "shrubby sophora". Subshrub, 50~120 cm high. The root is cylindrical and the outer skin is yellow. Stems herbaceous, green, with irregular longitudinal grooves, yellow fine hair when young. Single-pinnately compound leaves, alternate; sub locate stipules; leaf blade 20~25 cm long, rachis pubescent; 5~21 locules, sessile, ovate-ovate to oblong-lanceolate, apex round or blunt, base round or broadly cuneate, entire.

 Sophora flavescens Ait.:flowering plant Racemes terminal, 10~20 cm long, shortly pubescent; bracts linear; flowers yellowish white; calyx campulate, slightly obliquely, apex 5-lobed; corolla butterfly, slightly longer than other petals. The apex is nearly round; 10 stamens, filaments free, only base healing; 1 pistil, ovary superior, ovate stalk sessate.

 The pod is linear, with a long apex and no cracking when mature. The seeds are usually 3 to 7 seeds, and the seeds are contracted, black, and nearly spherical. The flowering period is from May to July, the fruiting period is from July to September.

 Ecological environment: The plant grows in sandy land or sunny hillside grass and gully side. Resource distribution: The plant distributes throughout China.

 Growth characteristics: The plant grows on the slopes of grassland, plains, roadside, sandy and red soil in the sun. The soil requirements are not strict, general sandy soil and clay soil it suitable, for deep roots of plants, should choose low groundwater level, good drainage plot for planting. In winter, the leaves turn yellow and fall off and enter dormancy. In the next spring, they turn green and grow again. In June, the buds bloom, and the fruits mature from July to mid-August, and the annual growth period is about 210 days.

 Light-yellow Sophora Root:herb photo Characters of herbs: The root is long cylindrical, often branched at the lower part, 10~30 cm long and l~2.5 cm in diameter. The surface is brownish yellow to grayish brown, with longitudinal wrinkles and transverse lenticels. The cork bark is thin, often broken and rolled back, easy to peel off, revealing the yellow endothelium. The texture of the herb is hard, not easily broken, the fracture surface is fibrous. The slices are 3~6 mm thick, with yellow-white cross-section and radial texture. The herb has a slight smell, it tastes bitter. The herb which has uniform strips, yellow and white cross-section and extremely bitter taste is better.

 Pharmacological actions: ①.Diuretic effect; ②.Resistance to pathogens: a high concentration of decoction in the test tube, has an inhibitory effect on tuberculosis bacilli. Decoction 8%, water infusion(1:3) in vitro have different degrees of inhibition on dermatophytes.

 Medicinal efficacy: Clear heat and drying dampness, insecticide, diuretic. It is indicated for heat dysentery, hemafecia, jaundice and urodialysis, leukorrhea with reddish discharge, swelling and itching of the genital region, eczema, wet sores, skin itching, scabies and leprosy, externally for trichomonas vaginitis.

 Administration of Radix Sophorae Flavescentis(Kǔ Shēn): 
Reference: Administration Guide of Radix Sophorae Flavescentis(Kǔ Shēn)
TCM Books: ①.Internally:4.5~9 grams.Externally:proper amount,wash the affected area with water decoction;②.Internally:water decoction, 1.5~3 qian(about 4.5~9 grams), or prepare to pill,powder.Externally:wash with water decoction;③.Internally:water decoction, 3~10 grams, prepared to pill, powder.Externally:proper amount,fumigation wash with water decoction,or prepare to ground herb powder and apply stick, or infusing in wine and smear.
 Contraindications,Precautions and Adverse Reactions: the herb Radix Sophorae Flavescentis should not be combined with black false hellebore.

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.
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