Rhizoma Polygoni Cuspidati(Giant Knotweed Rhizome).

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 Drying Dampness.

 TCM Herbs Icon05 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.

 
Classifications of Herbs.

 TCM Herbs Icon 05 Introduction: The Herbs Clearing Heat and Drying Dampness are known including:, , , , , , , , , , , , , , ,, , , , , , .

 ✵Till the date Oct 10th,2019, there are totally [22] kinds of common TCM herbs, [53] kinds of related plant species, are recorded in this category. These Herbs Clearing Heat and Drying Dampness are briefly introduced separately:

 
Rhizoma Polygoni Cuspidati(Giant Knotweed Rhizome).

 Rhizoma Polygoni Cuspidati Brief Introduction: The Herb Rhizoma Polygoni Cuspidati is the dried rhizome of giant or japanese knotweed, Polygonum cuspidatum sieb.et Zucc.(family Polygonaceae), used (1).to clear heat, counteract toxins, and promote bile flow in cases of hepatitis, jaundice, dysentery, bladder damp-heat, and lung heat with cough, (2).to activate blood and remove stasis for treating amenorrhea and traumatic injuries, and (3).externally for burns and venomous snake-bite. The herb is commonly known as Rhizoma Polygoni Cuspidati, Giant Knotweed Rhizome, Hǔ Zhànɡ.

 ✵The herb Rhizoma Polygoni Cuspidati(Giant Knotweed Rhizome) is the dried rhizome of Polygonum cuspidatum sieb.et Zucc., it is a plant of the Fallopia Genus, the Polygonaceae family of the Caryophyllales order. This commonly used species is introduced as:

 Polygonum cuspidatum Sieb. et Zucc 01 Polygonum cuspidatum Sieb. et Zucc:  The Polygonum cuspidatum Sieb. et Zucc is a plant of the Polygonaceae family and Fallopia genus, perennial shrub herb, up to 1 meter high. Roots lying underground, woody, brown, section obvious. Stems erect, tufted, glabrous, hollow, with scattered fuchsia spots. Leaves alternate; petiole short; stipules sheath membranous, brown, caducous; leaf blade broadly ovate or ovate-elliptic, 6~12 cm long, 5~9 cm wide, apex acute, base rounded or cuneate, entire, absent hair. Flowers unisexual, dioecious, axillary panicle; pedicel slender, central section, upper winged; perianth 5-parted, 2 lobes, outer 3-plex enlarged, fruiting on the back; 8 male flowers stamens; female flowers up to 3, stigma capitate. Achenes oval, 3 edges, dark brown. Its flowering period is from June to August, fruiting from September to October.

 Polygonum cuspidatum is a herbaceous perennial which forms large clumps 1~3 meters high. It is fully dioecious and can reproduce by seed and by large rhizomes which may reach a length of 5~6 meters. The stout stems are hollow and bamboo-like, extend from an erect base and are simple or little branched and glabrous with thinly membranous sheaths. Leaves are broadly ovate, truncate to cuneate at base, abruptly cuspidate, 5~15 cm long, 5~12 cm broad, with petioles 1~3 cm long. Greenish white flowers 2.5~3 mm long, densely arranged in axillary panicles; 3 styles; 8~10 stamens with longitudinally dehiscing anthers.

 Polygonum cuspidatum Sieb. et Zucc 02 Fruiting calyx wing-angled, 6-10 mm long. Achenes shiny black-brown, 3-4 mm long, acutely trigonous. Male flowers have branched panicles on upright racemes with the distal end of the raceme in the highest position; individual panicles generally point up. Female flowers are drooping or decumbent with the distal end in the lowest position; individual panicles are not oriented in a particular direction. Both male and female flowers possess vestigial organs of the opposite sex.

 Trait identification: Rhizome cylindrical, branched, varying in length, some up to 30 cm long, 0.5~2.5 cm, nodes slightly enlarged. The surface is tan to grayish brown, with obvious longitudinal wrinkles, fibrous root and dot fibrous root marks, branch tip and node have bud mark and sheath scale. Internode length 2~3 cm. Quality is hard, not easy to be broken, broken face palm yellow color, fibrous, skin and wood part easy to be separated, skin part is thinner, wood part occupies most, show radial shape, central pith or show hollow shape, longitudinal section has transverse partition, light smell, taste light bitter, astringent. The herb with a thick. Solid, break complexion yellow is better.

 
 

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