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
Medicinal | Edible Uses

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

Cultivation Notes: Prefers a deep, fertile, moderately heavy, humus rich, moisture retentive, well-drained soil in sun or semi-shade[200]. Grows well in heavy clay soils. Plants can be grown in quite coarse grass, which can be cut annually in the autumn[233]. This is a more robust form of the species[200], it is hardy to at least -15°c[238]. This sub-species is favoured for its medicinal properties over the species[244] and is cultivated as a medicinal plant in China[187]. Plants in this genus seem to be immune to the predations of rabbits[233]. Hybridizes freely with other members of this genus[200].

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Cultivation | Propagation | General Uses
Medicinal | Edible Uses

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