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Rheum nobile - Hook.f.&Thoms.
                 
Common Name Sikkim Rhubarb
Family Polygonaceae
USDA hardiness 6-9
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].
Habitats Rock ledges around 4000 metres[187]. Open slopes to 4500 metres[51].
Range E. Asia - Himalayas from Nepal to S.E. Tibet.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Moist Soil Semi-shade Full sun

Summary

Rheum nobile Sikkim Rhubarb


http://commons.wikimedia.org/wiki/File:Rheum_nobile.jpg
Rheum nobile Sikkim Rhubarb
© Bill Baker, Royal Botanic Gardens, Kew
   
Physical Characteristics
 icon of manicon of flower
Rheum nobile is a PERENNIAL growing to 1.5 m (5ft) by 1 m (3ft 3in).
It is hardy to zone (UK) 7. It is in flower from Jul to August, and the seeds ripen from Aug to September. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Wind.Suitable for: medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in heavy clay soil. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

Synonyms

Habitats
 Cultivated Beds;
Edible Uses
Edible Parts: Stem.
Edible Uses:

Leaf stem - raw or cooked[51, 105, 183, 272]. Pleasantly acid, this is a commonly used vegetable where it grows wild[2, 183].
Medicinal Uses


Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

Antiemetic;  Astringent;  Carminative;  Depurative;  Diuretic;  Laxative.

The root is astringent, carminative, depurative, diuretic, purgative and tonic[51, 91, 240]. Small doses act as an astringent tonic to the digestive system, whilst larger doses act as a mild laxative[232]. The flowering stem is used in Tibetan medicine, it is said to have a sour taste and a heating potency[241]. It is antiemetic, diuretic and laxative[241]. It is used in the treatment of swellings and fullness of the abdomen as well as to rid the body of retained fluids[241].
Other Uses
None known
Cultivation details
Prefers a deep, fertile, moderately heavy, humus rich, moisture retentive, well-drained soil in sun or semi-shade. Grows well in heavy clay soils. A very ornamental plant[1], it is hardy to about -15°c[200]. Plants have proved very difficult to grow in cultivation in Britain[187]. Plants in this genus seem to be immune to the predations of rabbits[233]. Hybridizes freely with other members of this genus[200].
Propagation
Seed - best sown in autumn in a shaded cold frame[200]. The seed can also be sown in spring in a cold frame. When large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse or cold frame for their first winter, planting them out in the spring. Division in early spring or autumn[1, 111]. Divide up the rootstock with a sharp spade or knife, making sure that there is at least one growth bud on each division. Larger divisions can be planted out direct into their permanent positions. We have found that it is better to pot up the smaller divisions and grow them on in light shade in a cold frame until they are well established before planting them out in late spring or early summer.
Other Names
Found In
Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status
IUCN Red List of Threatened Plants Status :
Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Jeffersonia diphyllaTwinleaf, Rheumatism Root02
Rheum australeHimalayan Rhubarb33
Rheum compactum 20
Rheum coreanum 01
Rheum officinaleChinese Rhubarb13
Rheum palmatumTurkey Rhubarb, Chinese Rhubarb - Da Huang, Chinese rhubarb35
Rheum palmatum tanguticumDa Huang35
Rheum rhaponticumRhubarb, Garden rhubarb23
Rheum ribes 20
Rheum spiciforme 21
Rheum tataricumTartarian Rhubarb20
Rheum x cultorumRhubarb43
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Expert comment
 
Author
Hook.f.&Thoms.
Botanical References
51200266
Links / References
For a list of references used on this page please go here
Readers comment
 
Elizabeth H.
Emma Ronald Sun Jan 20 2008
The roots of rheum nobile are known locally in North Sikkim as 'taga' & are traditionally used for dyeing of wool to weave blankets, shawls & carpets.
Elizabeth H.
Jaime Rodriguez Sun Aug 23 2009
The Alaska Rock Garden Society expedition to Yunnan in 2000 collected 12 seeds of Rheum nobile from Hongshan at an elevation of 4500m. One of these seeds germinated and has been growing in zone 4 in Palmer, Alaska since 2001. The plant is not yet mature enough to bloom, but seems strong and healthy. It has been growing in rich humus in partial shade. The garden where it has been growing was recently sold, so today I moved the plant to my garden in Wasilla, Alaska.
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Subject : Rheum nobile  

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