White-flowered Hedyotis, a name in traditional Chinese medicine, refers to the whole plant of Hedyotis diffusa Willd. of the Rubiaceae family. It is primarily produced in Yunnan, Guangdong, Guangxi, and Fujian.This herb has the effects of clearing heat and detoxifying, dispersing nodules and reducing swelling, and promoting diuresis to relieve dysuria. It is primarily used to treat abscesses, swellings, and toxic sores; intestinal abscesses and abdominal pain; masses and lumps caused by stagnation; painful and difficult urination due to heat; damp-heat jaundice; and snake and insect bites.
White-flowered Snake’s-tongue Grass
White-flowered Hedyotis, a name in traditional Chinese medicine, refers to the whole plant of Hedyotis diffusa Willd. of the Rubiaceae family. It is primarily produced in Yunnan, Guangdong, Guangxi, and Fujian.This herb has the effects of clearing heat and detoxifying, dispersing nodules and reducing swelling, and promoting diuresis to relieve dysuria. It is primarily used to treat abscesses, swellings, and toxic sores; intestinal abscesses and abdominal pain; masses and lumps caused by stagnation; painful and difficult urination due to heat; damp-heat jaundice; and snake and insect bites.
Chinese Name : 白花蛇舌草
Latin Name : Spreading Hedyotis Herb
Aliases : Snake-tongue Grass, Dwarf White-flowered Snake-tongue Grass, Snake-tongue Swell, Pearl-eyed Grass, Jointed-stamen Grass, Parrot-diuretic, Thousand-blow, Goat’s-whiskers, Snake-commander, Crane-tongue Grass, Narrow-leaved Willow, Armored Grass, Snake-needle Grass, White-flowered Cross Grass, Pointed-knife Grass
Authentic Producing Area : Yunnan, Guangdong, Guangxi, Fujian
Nature, Flavor & Meridian Tropism : Cold in nature; bitter and sweet in taste; enters the Heart, Liver, and Spleen meridians
Benefits & Efficacy
Benefits
Clears heat and detoxifies; disperses nodules and reduces swelling; promotes diuresis and relieves dysuria.
Indications
Mainly used to treat abscesses, swellings, and toxic sores; intestinal abscesses and abdominal pain; masses and lumps; painful and difficult urination due to heat; damp-heat jaundice; and snake and insect bites.
Usage and Dosage
1. Internal use: Decoct and take 6–30 g. 2. External use: Take an appropriate amount of the fresh herb, pound it into a paste, and apply to the affected area.
Precautions
Contraindicated in cases of yin-type ulcers and spleen-stomach deficiency-cold.
Chemical Constituents
It primarily contains cycloether terpenoid glycosides (such as carotinoside acid and deacetylcarotinoside acid) and triterpenoids (such as ursolic acid and oleanolic acid). In addition, it contains sterols, anthraquinones, and flavonoid glycosides.
Pharmacological Actions
This product possesses antimicrobial, anti-inflammatory, and immune-enhancing effects.
Relevant Discussions
1. *Compendium of Guangxi Traditional Chinese Medicine*: “Used to treat childhood malnutrition, venomous snake bites, and cancerous tumors. Externally, it is used to treat impetigo and snake-bite sores; in some regions, it is used to treat contusions, knife wounds, and boils.”
2. *Guangdong Materia Medica*: “Reduces swelling, detoxifies, dispels wind, relieves pain, and reduces inflammation. Primarily used to treat snake bites, cancer, appendicitis, and dysentery.”
3. *Fujian Materia Medica*: “Clears heat, detoxifies, reduces swelling, and relieves pain. Primarily used to treat acute pyelonephritis, epistaxis, endometritis, and herpes zoster.”
Applications
Clinical Applications
1. To treat abscesses, swellings, and toxic sores, use fresh plant material alone—pounded into a paste and applied topically—or combine it with herbs such as honeysuckle, forsythia, and wild chrysanthemum. To treat intestinal abscesses and abdominal pain, it is often combined with red vine, patrinia, and peony bark. To treat sore throat, it is frequently combined with scutellaria, scrophularia, and isatis root.To treat venomous snake bites, use fresh material alone—pounded into a paste, squeezed for juice, and taken orally, or decocted and taken as a decoction—with the residue applied to the wound; this method yields good results. It may also be combined with herbs such as Hanzhilian, Zihua Diding, and Zhaoxiu.
2. For treating damp-heat in the bladder and painful, scanty, and painful urination, this herb may be used alone or is often combined with White Sedge Root, Plantain Herb, and Stone Weed.
Related Compatibility
1. White Flower Snake Tongue Grass combined with Isatis Leaf: Both herbs have the ability to clear heat and eliminate toxins; White Flower Snake Tongue Grass can also disperse nodules and reduce swelling, while Isatis Leaf is particularly effective at clearing toxins during epidemics.When combined, these two herbs work synergistically to clear heat, eliminate toxins, soothe the throat, reduce swelling, and relieve pain. This combination is suitable for treating sore throat, fever, and cough caused by wind-heat ascending to the upper burner or heat-toxin obstructing the lungs, as well as abscesses, swellings, and skin infections.
2. White Flower Snake Tongue Grass combined with Da Xue Teng: White Flower Snake Tongue Grass clears heat, drains dampness, disperses nodules, and reduces swelling; Da Xue Teng clears heat, detoxifies, removes blood stasis, and relieves pain. When combined, these two herbs enhance the ability to clear and drain damp-heat and blood stasis from the large intestine, reduce swelling, and relieve pain. This combination is suitable for intestinal abscesses and abdominal pain caused by the accumulation of heat-toxin in the large intestine.
3. White Flower Snake Tongue Grass combined with Plantain Herb: White Flower Snake Tongue Grass excels at clearing and draining damp-heat, while Plantain Herb excels at promoting urination and relieving dysuria. When combined, these two herbs enhance the effects of clearing heat, draining dampness, and relieving dysuria. This combination is suitable for conditions involving stagnation of damp-heat in the lower jiao, presenting with frequent, scanty, and painful urination.
4. White Flower Snake’s-tongue Grass combined with Polygonum cuspidatum: White Flower Snake’s-tongue Grass excels at clearing heat, detoxifying, and draining dampness. Polygonum cuspidatum excels at draining dampness, alleviating jaundice, and dispersing blood stasis. When combined, these two herbs work together to clear heat, detoxify, promote bile secretion, and alleviate jaundice. This combination is indicated for costal pain, jaundice, nausea, aversion to greasy foods, poor appetite, and epigastric and abdominal distension caused by damp-heat in the liver and gallbladder.
5. White Flower Snake Tongue Grass combined with Half-Branch Lotus: Both herbs possess heat-clearing and detoxifying properties. White Flower Snake Tongue Grass excels at dispersing nodules and reducing swelling, while Half-Branch Lotus excels at detoxifying and resolving blood stasis. When combined, these two herbs effectively detoxify, disperse nodules, resolve blood stasis, and eliminate masses, making them suitable for treating masses and masses caused by the accumulation of blood stasis and toxins.
Medicinal Identification
White Flower Snake-tongue Grass and Half-branch Lotus: Both herbs possess the functions of clearing heat, detoxifying, and draining dampness, and can be used to treat abscesses, swellings, and skin infections caused by heat toxins, as well as damp-heat dysuria. However, White Flower Snake-tongue Grass excels at detoxifying, dispersing nodules, and reducing swelling; it is particularly effective for treating abscesses, swellings, and toxic sores, as well as sore throats and masses or accumulations.Banbianlian excels at detoxifying, promoting diuresis, reducing swelling, and alleviating jaundice; it is particularly effective for treating edema and distension, damp-heat jaundice, and snake and insect bites.
Related Medicines
Compound Guazijin Granules, Yanning Granules, Hepatitis B Heat-Clearing and Detoxifying Granules (capsules, tablets), Longqing Tablets, Shenshu Granules, Shuanghu Liver-Clearing Granules, and Huahong Granules (tablets).
Medicinal Diet Therapy
White Flower Snake Tongue Grass Honey Elixir:
1. Effects: Clears heat, detoxifies, promotes diuresis, and dispels dampness. Suitable for acute hepatitis, chronic hepatitis, and cholecystitis caused by damp-heat. Individuals with spleen-stomach deficiency-cold should not consume this product.
2. Ingredients: 125 grams of White Flower Snake Tongue Grass, 250 grams of honey.
3. Preparation: Wash the White Flower Snake Tongue Grass, decoct in water, strain to remove the residue, and collect the liquid. Place the herbal decoction in a porcelain bowl. Add honey and stir until well blended. Cover and simmer over low heat in a double boiler for 1–2 hours. Allow to cool, then take with hot water.
4. Dosage: 1–2 tablespoons per dose, twice daily.
Notes
Patients requiring treatment with Chinese herbal medicine should first consult a licensed Traditional Chinese Medicine (TCM) hospital to receive a prescription following a professional TCM differential diagnosis.
Processing & Preparation
Harvesting & Processing
Harvest in summer and fall, remove impurities, and sun-dry.
Processing Methods
Remove impurities, wash thoroughly, cut into sections, dry, and sieve.
Storage Methods
Store in a well-ventilated, dry place.
Crude Drug Identification
Properties of Crude Drugs
The entire plant is twisted into a ball-like mass, ranging in color from gray-green to gray-brown. The main root is slender and elongated, approximately 2 mm in diameter, with fine, delicate lateral roots that are pale gray-brown. The stem is slender, twisted, brittle, and easily broken, with a white central pith.Leaves are mostly shriveled, fragmented, and easily detached; stipules are 1–2 mm long. Flowers and fruits occur singly or in pairs in the leaf axils; flowers often have short, slightly thick pedicels. The capsule is flattened-spherical, splitting along the back; the persistent calyx is 4-lobed at the apex, with short spiny hairs along the margins. It has a faint odor and a bland taste.
Properties of Processed Slices
It consists of mixed segments and pieces of the root, stem, leaves, flowers, and fruit. The roots are slender and pale grayish-brown. The stems are slender with longitudinal ridges; their surface is pale brown or brownish-black; they are brittle and break easily, with a white pith in the center of the cross-section. The leaves are linear, brownish-black, and mostly fragmented. The flowers are white and axillary. The capsules are flattened-spherical. They have a faint odor and a bland taste.
Botanical Information
Botanical Classification
White-flowered Snake-tongue Grass (Houttuynia cordata), a plant of the genus Houttuynia in the Rubiaceae family.
Morphological Characteristics
An annual prostrate herb, 15–50 cm tall. The roots are slender, branched, and white. The stem is slightly square or flattened-cylindrical, smooth and glabrous, and profusely branched from the base. Leaves are opposite; leaf blades are linear to linear-lanceolate, with an acute apex; stipules are membranous and fused at the base to form a sheath.Flowers are solitary or in pairs in the leaf axils; the calyx tube is globose, 4-lobed, with oblong-lanceolate lobes; the corolla is white and funnel-shaped; there are 4 stamens, attached to the throat of the corolla tube; the ovary is inferior and 2-chambered; the stigma is shallowly 2-lobed and hemispherical. The capsule is flattened-globose. Seeds are brownish-yellow, minute, and have 3 ridges.Flowering period: July–September; fruiting period: August–October.
Distribution Area
It is distributed throughout southeastern to southwestern China.
Growth Habits
It prefers a warm and humid environment, is intolerant of drought and waterlogging, and is not particular about soil type, though it grows best in fertile sandy loam or humus-rich loam.
Propagation Methods
Propagated by seed.
Cultivation Techniques
1. Seed propagation: Sow in March–April using broadcast seeding or row seeding in wide furrows, with a row spacing of 10–12 cm. Cover lightly with soil and keep the soil moist.
2. Field management: After germination, loosen the soil, remove weeds, thin the seedlings, and apply top dressing 1–2 times.