Rumex hydrolapathum
Huds.
Polygonaceae
Acetosa heterophyla Raf.
Lapathum giganteum Opiz
Lapathum hydrolapathum (Huds.) Scop.
Lapathum rivale P.Renault
Rumex antiscorbuticus Salisb.
Rumex britanica Huds.
Rumex chabertii Gand.
Rumex maximus C.C.Gmel.
Common Name: Great Water Dock
General Information
Rumex hydrolapathum is a perennial plant that with an erect stem; it can grow around 100 - 200cm tall[
74- Title
- Flora of the USSR.
- Publication
-
- Author
- Komarov. V. L.
- Website
- http://www.biodiversitylibrary.org
- Publisher
- Israel Program for Scientific Translation
- Year
- 1968
- ISBN
- -
- Description
- An immense (25 or more large volumes) and not yet completed translation of the Russian flora. Full of information on plant uses and habitats but heavy going for casual readers. It can be downloaded from the Internet.
].
The plant is harvested from the wild for local use as a food, medicine and source of materials.
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- Title
- Encyclopaedia of Herbs and their Uses.
- Publication
-
- Author
- Bown. D.
- Publisher
- Dorling Kindersley, London.
- Year
- 1995
- ISBN
- 0-7513-020-31
- Description
- A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.
].
Botanical References
17- Title
- Flora of the British Isles.
- Publication
-
- Author
- Clapham, Tutin and Warburg.
- Publisher
- Cambridge University Press
- Year
- 1962
- ISBN
- -
- Description
- A very comprehensive flora, the standard reference book but it has no pictures.
,
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
Range
Almost throughout Europe eastwards to western Siberia and Turkey
Habitat
Near ponds and streams, also in shallow water, avoiding acid conditions[
17- Title
- Flora of the British Isles.
- Publication
-
- Author
- Clapham, Tutin and Warburg.
- Publisher
- Cambridge University Press
- Year
- 1962
- ISBN
- -
- Description
- A very comprehensive flora, the standard reference book but it has no pictures.
]. Bogs, and banks of rivers, lakes, and brooks[
74- Title
- Flora of the USSR.
- Publication
-
- Author
- Komarov. V. L.
- Website
- http://www.biodiversitylibrary.org
- Publisher
- Israel Program for Scientific Translation
- Year
- 1968
- ISBN
- -
- Description
- An immense (25 or more large volumes) and not yet completed translation of the Russian flora. Full of information on plant uses and habitats but heavy going for casual readers. It can be downloaded from the Internet.
].
Properties
| Edibility Rating |  |
| Medicinal Rating |  |
| Habit | Perennial |
| Height | 1.80 m |
| Pollinators | Wind |
| Cultivation Status | Wild |
Cultivation Details
Requires a moist or wet soil, also succeeding in shallow water. Avoids acid conditions in the wild.
This species hybridizes in the wild with several other members of the genus[
74- Title
- Flora of the USSR.
- Publication
-
- Author
- Komarov. V. L.
- Website
- http://www.biodiversitylibrary.org
- Publisher
- Israel Program for Scientific Translation
- Year
- 1968
- ISBN
- -
- Description
- An immense (25 or more large volumes) and not yet completed translation of the Russian flora. Full of information on plant uses and habitats but heavy going for casual readers. It can be downloaded from the Internet.
].
A very important food plant for the caterpillars of many species of butterfly[
30- Title
- Butterflies and Moths in Britain and Europe.
- Publication
-
- Author
- Carter D.
- Publisher
- Pan
- Year
- 1982
- ISBN
- 0-330-26642-x
- Description
- An excellent book on Lepidoptera, it also lists their favourite food plants.
].
Edible Uses
Young leaves - cooked[
2- Title
- Sturtevant's Edible Plants of the World.
- Publication
-
- Author
- Hedrick. U. P.
- Publisher
- Dover Publications
- Year
- 1972
- ISBN
- 0-486-20459-6
- Description
- Lots of entries, quite a lot of information in most entries and references.
,
105- Title
- Tanaka's Cyclopedia of Edible Plants of the World.
- Publication
-
- Author
- Tanaka. T. & Nakao S.
- Publisher
- Keigaku Publishing; Tokyo
- Year
- 1976
- ISBN
- -
- Description
- The most comprehensive list of edible plants I've come across. Only the briefest entry for each species, though, and some of the entries are more than a little dubious. Not for the casual reader.
,
183- Title
- Cornucopia - A Source Book of Edible Plants.
- Publication
-
- Author
- Facciola. S.
- Publisher
- Kampong Publications
- Year
- 1990
- ISBN
- 0-9628087-0-9
- Description
- Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.
].
Seed - raw or cooked. It can be ground into a powder and used as a flour[
102- Title
- Native Harvests.
- Publication
-
- Author
- Kavasch. B.
- Publisher
- Vintage Books
- Year
- 1979
- ISBN
- 0-394-72811-4
- Description
- Another guide to the wild foods of America.
]. The seed is small and rather fiddly to harvest.
Medicinal
The root is antiscorbutic and strongly astringent[
4- Title
- A Modern Herbal.
- Publication
-
- Author
- Grieve.
- Publisher
- Penguin
- Year
- 1984
- ISBN
- 0-14-046-440-9
- Description
- Not so modern (1930's?) but lots of information, mainly temperate plants.
]. It is harvested in early spring and dried for later use[
4- Title
- A Modern Herbal.
- Publication
-
- Author
- Grieve.
- Publisher
- Penguin
- Year
- 1984
- ISBN
- 0-14-046-440-9
- Description
- Not so modern (1930's?) but lots of information, mainly temperate plants.
].
The green leaves are said to be an excellent application for ulcers of the eyes[
4- Title
- A Modern Herbal.
- Publication
-
- Author
- Grieve.
- Publisher
- Penguin
- Year
- 1984
- ISBN
- 0-14-046-440-9
- Description
- Not so modern (1930's?) but lots of information, mainly temperate plants.
].
Other Uses
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- Title
- Vegetable Tannins
- Publication
-
- Author
- Rottsieper. E.H.W.
- Publisher
- The Forestal Land, Timber and Railways Co. Ltd.
- Year
- 1946
- ISBN
- -
- Description
- A fairly detailed treatise on the major sources of vegetable tannins.
].
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- Title
- Nature's Colors - Dyes from Plants.
- Publication
-
- Author
- Grae. I.
- Publisher
- MacMillan Publishing Co. New York.
- Year
- 1974
- ISBN
- 0-02-544950-8
- Description
- A very good and readable book on dyeing.
].
The dried and powdered root makes a good tooth cleaner[
4- Title
- A Modern Herbal.
- Publication
-
- Author
- Grieve.
- Publisher
- Penguin
- Year
- 1984
- ISBN
- 0-14-046-440-9
- Description
- Not so modern (1930's?) but lots of information, mainly temperate plants.
].
Propagation
Seed - sow spring in situ.
Division in spring.
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Useful Temperate Plants Database 2016 by
Ken Fern,
web interface by
Ajna Fern
with help from
Richard Morris.
