Rheum palmatum tanguticum Da Huang (Polygonaceae)

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Rheum palmatum tanguticum
Da Huang
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The Rheum palmatum tanguticum plant species is found in E. Asia - N.W. China. It is a member of the Polygonaceae family. Common gardeners may know the plant as Da Huang. Some home gardeners know the variety as R. tanguticum. (Reg.)Maxim.

Cultivation | Propagation | General Uses
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Latin Name:  Rheum palmatum tanguticum
Common Name:  Da Huang
Family:  Polygonaceae
Author:  Reg.

Known Hazards:  Although no specific mention has been seen for this species, the leaves of some if not all members of this genus contain significant quantities of oxalic acid and should not be eaten in any quantity. Oxalic acid can lock up certain minerals in the body, especially calcium, leading to nutritional deficiency. The content of oxalic acid will be reduced if the plant is cooked. People with a tendency to rheumatism, arthritis, gout, kidney stones or hyperacidity should take especial caution if including this plant in their diet since it can aggravate their condition[238].

Mature Height:  2   Mature Width:  0.8

Habitat:  Not known

Medicinal Information: Rhubarb has a long and proven history of herbal usage, its main effect being a positive and balancing effect upon the whole digestive system. It is one of the most widely used herbs in Chinese medicine[238]. The root is anticholesterolemic, antiseptic, antispasmodic, antitumor, aperient, astringent, cholagogue, demulcent, diuretic, laxative, purgative, stomachic and tonic[4, 7, 9, 21, 91, 171, 176, 238]. The roots contain anthraquinones, which have a purgative effect, and also tannins and bitters, which have an opposite astringent effect[244]. When taken in small doses, it acts as an astringent tonic to the digestive system, whilst larger doses act as a mild laxative[232, 244]. The root is taken internally in the treatment of chronic constipation, diarrhoea, liver and gall bladder complaints, haemorrhoids, menstrual problems and skin eruptions due to an accumulaton of toxins[238]. This remedy is not prescribed for pregnant or lactating women, nor for patients with intestinal obstruction[238]. Externally, the root is used in the treatment of burns[238]. The roots are harvested in October from plants that are at least six years old, they are then dried for later use[4]. A homeopathic remedy is prepared from the dried root[232]. This is used especially in the treatment of diarrhoea in teething children[232].

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Cultivation | Propagation | General Uses
Medicinal | Edible Uses

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