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Rumex hydrolapathum - Huds.
                 
Common Name Great Water Dock
Family Polygonaceae
USDA hardiness 5-9
Known Hazards Plants can contain quite high levels of oxalic acid, which is what gives the leaves of many members of this genus an acid-lemon flavour. Perfectly alright in small quantities, the leaves should not be eaten in large amounts since the oxalic acid can lock-up other nutrients in the food, especially calcium, thus causing mineral deficiencies. The oxalic acid content 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 Near ponds and streams, also in shallow water, avoiding acid conditions[17].
Range Western Europe, including Britain, from Scandanavia south and east to Spain, Italy and S. Russia.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Moist Soil Wet Soil Water Plants Semi-shade Full sun

Summary

Rumex hydrolapathum Great Water Dock


http://commons.wikimedia.org/wiki/File:Rumex_hydrolapathum_Sturm53.jpg
Rumex hydrolapathum Great Water Dock
   
Physical Characteristics
 icon of manicon of flower
Rumex hydrolapathum is a PERENNIAL growing to 1.8 m (6ft).
It is hardy to zone (UK) 6 and is not frost tender. It is in flower from Jul to September, and the seeds ripen from Aug to September. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Wind.It is noted for attracting wildlife.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist or wet soil and can grow in water.

Synonyms

Habitats
 Pond; Bog Garden;
Edible Uses
Edible Parts: Leaves;  Seed.
Edible Uses:

Young leaves - cooked[2, 105, 183]. Seed - raw or cooked. It can be ground into a powder and used as a flour[102]. The seed is small and rather fiddly to harvest.
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.

Antiscorbutic;  Astringent;  Ophthalmic.

The root is antiscorbutic and strongly astringent[4]. It is harvested in early spring and dried for later use[4]. The green leaves are said to be an excellent application for ulcers of the eyes[4].
Other Uses
Dye;  Tannin;  Teeth.

The roots contain tannin. In cultivated plants, those grown on dry land contained 6 - 8% tannin whilst those grown in water contained 12.4 - 21.6%[223]. The dried and powdered root makes a good tooth cleaner[4]. Dark green to brown and dark grey dyes can be obtained from the roots of many species in this genus, They do not need a mordant[168].
Cultivation details
Requires a moist or wet soil, also succeeding in shallow water. Avoids acid conditions in the wild. A very important food plant for the caterpillars of many species of butterfly[30].
Propagation
Seed - sow spring in situ. Division in spring.
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
Rumex abyssinicusSpinach Rhubarb10
Rumex acetosaSorrel, Garden sorrel53
Rumex acetosellaSheeps Sorrel, Common sheep sorrel43
Rumex alpinusAlpine Dock, Munk's rhubarb42
Rumex angiocarpusCommon sheep sorrel10
Rumex aquaticusRed Dock, Western dock13
Rumex arcticusArctic Dock21
Rumex arifoliusMaiden Sorrel10
Rumex berlandieriamamastla10
Rumex browniiSwamp Dock20
Rumex bucephalophorusred dock10
Rumex conglomeratusSharp Dock, Clustered dock12
Rumex crispusCurled Dock, Curly dock23
Rumex daiwoosour dock12
Rumex dentatustoothed dock11
Rumex gmelinii 10
Rumex graminifoliusGrassleaf sorrel10
Rumex hastatus 22
Rumex hymenosepalusCanaigre, Canaigre dock22
Rumex japonicus 20
Rumex longifoliusdooryard dock11
Rumex maritimusGolden Dock12
Rumex mexicanusMexican Dock12
Rumex nepalensis 12
Rumex obtusifoliusRound-Leaved Dock, Bitter dock12
Rumex occidentalisWestern Dock11
Rumex patientiaHerb Patience31
Rumex paucifoliusFewleaved Dock, Alpine sheep sorrel10
Rumex pulcherFiddle Dock10
12
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Expert comment
 
Author
Huds.
Botanical References
17200
Links / References
For a list of references used on this page please go here
Readers comment
 
Elizabeth H.
Julian Dowding Sun May 21 2006
Great and stately plant. As a foodplant for the Large Copper butterfly which is on the verge of extinction.Habitat management for this butterfly neceearily involves ensuring the survival of this plant.
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Subject : Rumex hydrolapathum  

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