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Useful Temperate Plants

Polygonum yokusaianum

Makino.

Polygonaceae


The Temperate Database is in the process of being updated, with new records being added and old ones being checked and brought up to date where necessary. This record has not yet been checked and updated.

+ Synonyms

Common Name:

No Image.

General Information

Polygonum yokusaianum is an annual plant that can grow up to 0.60 metres tall.
It is harvested from the wild for local use as a food.

Known Hazards

Although no specific mention has been made for this species, there have been reports that some members of this genus can cause photosensitivity in susceptible people.
Many species also contain oxalic acid (the distinctive lemony flavour of sorrel) - whilst not toxic this substance can bind up other minerals making them unavailable to the body and leading to mineral deficiency. Having said that, a number of common foods such as sorrel and rhubarb contain oxalic acid and the leaves of most members of this genus are nutritious and beneficial to eat in moderate quantities. Cooking the leaves will reduce their content of oxalic acid. 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

58
Title
Flora of Japan. (English translation)
Publication
 
Author
Ohwi. G.
Publisher
Smithsonian Institution
Year
1965
ISBN
-
Description
The standard work. Brilliant, but not for the casual reader.
,
266
Title
Flora of China
Publication
 
Author
 
Website
http://flora.huh.harvard.edu/china/
Publisher
Missouri Botanical Garden Press; St. Louis.
Year
1994
ISBN
 
Description
An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.

Range

E. Asia - Japan.

Habitat

Woods in foothills all over Japan[
58
Title
Flora of Japan. (English translation)
Publication
 
Author
Ohwi. G.
Publisher
Smithsonian Institution
Year
1965
ISBN
-
Description
The standard work. Brilliant, but not for the casual reader.
]. Mixed forests on mountain slopes, moist valleys at elevations of 100 - 3000 metres in China[
266
Title
Flora of China
Publication
 
Author
 
Website
http://flora.huh.harvard.edu/china/
Publisher
Missouri Botanical Garden Press; St. Louis.
Year
1994
ISBN
 
Description
An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
].

Properties

Edibility Rating *
HabitAnnual
Height0.60 m
Cultivation StatusWild

Cultivation Details

We have very little information on this species and do not know if it is hardy in Britain, though it should be possible to grow it as a spring-sown annual in this country. The following notes are based on the general needs of the genus.
Succeeds in an ordinary garden soil[
1
Title
RHS Dictionary of Plants plus Supplement. 1956
Publication
 
Author
F. Chittendon.
Publisher
Oxford University Press
Year
1951
ISBN
-
Description
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [200]).
] but prefers a moisture retentive not too fertile soil in sun or part shade[
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.
]. Repays generous treatment[
1
Title
RHS Dictionary of Plants plus Supplement. 1956
Publication
 
Author
F. Chittendon.
Publisher
Oxford University Press
Year
1951
ISBN
-
Description
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [200]).
].
Plants seem to be immune to the predations of rabbits[
233
Title
Perennial Garden Plants
Publication
 
Author
Thomas. G. S.
Publisher
J. M. Dent & Sons, London.
Year
1990
ISBN
0 460 86048 8
Description
A concise guide to a wide range of perennials. Lots of cultivation guides, very little on plant uses.
].

Edible Uses

Young plant - cooked[
177
Title
Plants for Human Consumption
Publication
 
Author
Kunkel. G.
Publisher
Koeltz Scientific Books
Year
1984
ISBN
3874292169
Description
An excellent book for the dedicated. A comprehensive listing of Latin names with a brief list of edible parts.
].
Seed - raw or cooked. It is rather small and fiddly to utilize.

Medicinal

None known

Other Uses

None known

Propagation

Seed - sow spring in a cold frame. Germination is usually free and easy. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer if they have reached sufficient size. If not, overwinter them in a cold frame and plant them out the following spring after the last expected frosts.
Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2020-10-21. <temperate.theferns.info/plant/Polygonum+yokusaianum>

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