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Botanical Name : Gentiana scabra
Species: G. scabra
Common Name; Long Dan Cao, Japanese gentian
Habitat :Gentiana scabra is native to E. Asia – China, Japan.( Now it is found in much of the United states and Japan ,Korea, E Russia (Fujian, Jiangsu, Zhejiang ).It grows in river banks, grassland and roadside slopes, moist meadows, scrub, forest margins, forests; 400-1700 m.
Gentiana scabra is a perennial plant . growing 30-60 cm tall. Stems apically papillate. Stem leaves sessile; lowermost leaves scalelike, 4-6 mm; middle to upper leaves linear-lanceolate, ovate-lanceolate, or ovate, 2-7 × (0.4-)2-3 cm, base rounded to subcordate, margin scabrous and revolute, apex acuminate to acute, veins 3-5. Upper leaves slightly smaller, shorter than flowers and surrounding their bases. Inflorescences 1 to many flowered, terminal or in axillary clusters, axillary clusters rarely on pedunclelike branches; bracts linear-lanceolate to lanceolate, 2-2.5 cm. Flowers sessile. Calyx tube 1-1.2 cm, entire; lobes spreading to erect, linear, 8-10 mm, margin scabrous, apex acute. Corolla blue-purple, sometimes with yellow-green spots in throat, tubular-campanulate to funnelform, 4-5 cm; lobes ovate to ovate-orbicular, 7-9 mm, apex rounded and apiculate; plicae obliquely and narrowly triangular, 3-4 mm, apex acute or slightly 2cleft. Stamens inserted at middle of corolla tube; filaments 0.9-1.2 cm; anthers free, narrowly ellipsoid, 3.5-4.5 mm. Style 3-4 mm. Capsules 2-2.5 cm; gynophore to 1.5 cm. Seeds 1.8-2.5 mm. It is hardy to zone (UK) 5. It is in flower from Aug to September. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bumblebees, butterflies.
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Seed – best sown as soon as it is ripe in a light position in a cold frame. It can also be sown in late winter or early spring but the seed germinates best if given a period of cold stratification and quickly loses viability when stored, with older seed germinating slowly and erratically. It is advantageous to keep the seed at about 10?C for a few days after sowing, to enable the seed to imbibe moisture. Following this with a period of at least 5 – 6 weeks with temperatures falling to between 0 and -5?C will usually produce reasonable germination. It is best to use clay pots, since plastic ones do not drain so freely and the moister conditions encourage the growth of moss, which will prevent germination of the seed. The seed should be surface-sown, or only covered with a very light dressing of compost. The seed requires dark for germination, so the pots should be covered with something like newspaper or be kept in the dark. Pot up the seedlings into individual pots as soon as they are large enough to handle and grow on in light shade in the greenhouse for at least their first winter. The seedlings grow on very slowly, taking 2 – 7 years to reach flowering size. When the plants are of sufficient size, place them out into their permanent positions in late spring or early summer. Division in March. Most members of this genus have either a single tap-root, or a compact root system united in a single root head, and are thus unsuitable for division. Cuttings of basal shoots in late spring.
Young plant and old leaves – cooked & eaten. A famine food, used when all else fails.
Long Dan Cao is used as a bitter tonic in Chinese herbalism where it promotes digestive secretions and treats a range of illnesses associated with the liver. The root is antibacterial and stomachic. It is used in the treatment of anorexia, dyspepsia, jaundice, leucorrhoea, eczema, conjunctivitis, sore throat, acute infection of the urinary system, hypertension with dizziness and tinnitus. The root is harvested in the autumn and dried for later use. This species is one of several that are the source of the medicinal gentian root, the following notes are based on the general uses of G. lutea which is the most commonly used species in the West. Gentian root has a long history of use as a herbal bitter in the treatment of digestive disorders and is an ingredient of many proprietary medicines. It contains some of the most bitter compounds known and is used as a scientific basis for measuring bitterness. It is especially useful in states of exhaustion from chronic disease and in all cases of debility, weakness of the digestive system and lack of appetite. It is one of the best strengtheners of the human system, stimulating the liver, gall bladder and digestive system, and is an excellent tonic to combine with a purgative in order to prevent its debilitating effects. The root is anthelmintic, anti-inflammatory, antiseptic, bitter tonic, cholagogue, emmenagogue, febrifuge, refrigerant, stomachic. It is taken internally in the treatment of liver complaints, indigestion, gastric infections and anorexia. It should not be prescribed for patients with gastric or duodenal ulcers. The root is harvested in the autumn and dried for later use. It is quite likely that the roots of plants that have not flowered are the richest in medicinal properties.
The root is a bitter, cooling, anti-inflammatory herb that stimulates the appetite and digestion, increases blood sugar levels and potentiates the sedative and analgesic properties of other herbs. Internally used for liver disorders, eye complaints related to liver disharmony (such as conjunctivitis), acute urinary infections, hypertension with dizziness or tinnitus and tantrums in children. Included in many Chinese patent remedies for “liver heat.” It is also used in the treatment of jaundice, leucorrhoea, eczema, conjunctivitis, and sore throat.
The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplements, it is always advisable to consult with your own health care provider.
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