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Equisetum hyemale

Common name:	Dutch Rush	Family:	Equisetaceae
Author:	L.	Botanical references:	1, 17
Synonyms:
Known Hazards:	Large quantities of the plant can be toxic. This is because it contains the enzyme thiaminase[172], a substance that can rob the body of the vitamin B complex[65]. In small quantities this enzyme will do no harm to people eating an adequate diet that is rich in vitamin B, though large quantities can cause severe health problems. The enzyme is destroyed by heat or thorough drying, so cooking the plant will remove the thiaminase[172]. The plant also contains equisetic acid - see the notes on medicinal uses for more information[213].
Range:	Temperate regions of Europe, including Britain, N. America and Asia.
Habitat:	Shady streambanks etc, to 500 metres[17].
Edibility Rating (1-5):	2	Medicinal Rating (1-5):	2

Other Possible Synonyms:	From various places across the web, may not be correct. See below.
	E. affine[B,P] E. hiemale[E,H] E. hyemale ssp. affine[B,P] E. hyemale var. affine[B,CPHOTO,CAL,CAL,P] E. hyemale var. californicum[B,P] E. hyemale var. pseudohyemale[B,P] E. hyemale var. robustum[B,P] E. praealtum[B,P] E. robustum[B,P] Hippochaete hyemalis[B] Hippochaete hyemalis ssp. affinis[B,P]
Other Common Names:	From various places around the Web, may not be correct. See below.
	Buyuk Atkuyrugu [E], Horsetail [H], Mu Tsei [E], Rough Horsetail [L], Schaafstro [D], Scouring Rush [H], Scouring-rush [L], Scouringrush Horsetail [P], Shavegrass [H,E], Tall Scouring-rush [B], Tokusa [E],
Epithets:	From a Dictionary of Botanical Epithets
	hyemale = of winter
Systematics:	From a USDA Plants Database
	Order: Equisetales. Horsetail family
Other Range Info:	From the Ethnobotany Database
	Austria Canada(Kwakiutl) China Germany Turkey
Noxious, Invasive and Injurious Weeds	From USDA PLANTS database, Weeds Australia , DEFRA Injurious Weeds
	Listed as noxious/invasive for: New South Wales, South Australia, Western Australia, Tasmaina, Queensland.

Physical Characteristics

Perennial growing to 1m. It is hardy to zone 5. The seeds ripen from July to August. We rate it 2/5 for edibility and 2/5 for medicinal use.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils. The plant prefers acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It requires moist soil.

Habitats and Possible Locations

Bog Garden, Cultivated Beds.

Edible Uses

Root Stem.

Strobil (the fertile shoots in spring) - cooked[177]. An asparagus substitute. Caution is advised, see the notes above on toxicity.
Roots - dried and then cooked[257]. A source of starch[177]. Caution is advised, see the notes above on toxicity.
A further report says that the peeled stems, base of the plant, root and tubers were eaten raw by the N. American Indians, the report went on to say that this may be inadvisable[85].

Medicinal Uses

Disclaimer

Antibacterial Antiinflammatory Antispasmodic Appetizer Cancer Diaphoretic Diuretic Expectorant Febrifuge Hypotensive Styptic.

Horsetails have an unusual chemistry compared to most other plants[238]. They are rich in silica, contain several alkaloids (including nicotine) and various minerals[238, 279].
The plant is anticancer, anti-inflammatory, antispasmodic, diaphoretic, diuretic, expectorant, febrifuge, haemostatic, hypotensive and styptic[147, 176. 218, 279]. It also has an appetite-stimulating effect[279]]. The barren stems are used, they are most active when fresh but can also be dried and sometimes the ashes of the pant are used[4]. The plant is a useful diuretic when taken internally and is used in the treatment of kidney and bladder problems[4]. A decoction applied externally will stop the bleeding of wounds and promote healing[4].
The plant contains polyphenolic flavonoids with bactericidal activity[218].

Other Uses

Dye Fungicide Liquid feed Musical Paper Parasiticide Polish Sandpaper Scourer.

The stems are very rich in silica[4]. They are used for scouring and polishing metal[1, 4, 46, 61, 99] and as a fine sandpaper[54, 99]. The stems are first bleached by repeated wetting and drying in the sun[74]. They can also be used as a polish for wooden floors and furniture[46, 178].
The infused stem is an effective fungicide against mildew, mint rust and blackspot on roses[14]. It also makes a good liquid feed[54]. Used as a hair rinse it can eliminate fleas, lice and mites[213, 257].
A light pink dye is obtained from the stem[99].
The hollow stems have been used as whistles[257]. Another report says that the stem joints are pulled apart and used by children to produce a whistling sound[257].

Cultivation details

Prefers a moist soil with a pH between 6.5 and 7.5[200].
Plants are hardy to about -30° c[200].
The stems of this species were once exported to Britain in quantity from Holland so that they could be used as an abrasive for cleaning pots and pans[238].
Plants have a deep and penetrating root system and can be invasive. If grown in the garden they are best kept in bounds by planting them in a large container which can be sunk into the ground[200].

Propagation

Spores - best collected as soon as they are ripe in the spring and surface-sown immediately on a sterile compost. Keep moist and pot up as soon as the plants are large enough to handle. Very difficult[200].
Division. The plants usually spread very freely when well sited and should not really need any assistance.

Suppliers

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

Web References

Details of Medicinal Uses, Habitats, etc. in M. Grieve A Modern Herbal (1931) [4]
[H] Details of Scandanavian and European Common names in Henriette's names database
[L] Scientific and Common Names (some photos) from Lepidoptera and some other life forms
[E] Ethnobotany Data (common names, uses, countries) from the Ethnobotany Database.
[V] Images from the Vascular Plant Image Gallery of the Texas A& M Bioinformatics Working Group.
[B] Data (Latin & Common names, other references) from the BONAP's Synonymized Checklist of the Vascular Flora of the United States, Puerto Rico, and the Virgin Islands.
[C] Taxon data. from the CalFlora database.
[C] Taxon data. from the CalFlora database.
Images from the CalPhoto database.
[PHARM] Phytochemical Data (common names, uses, countries) from Dr Duke's Phytochemical Database.
[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database

References for Equisetum hiemale (a possible synonym).

[H] Details of Scandanavian and European Common names in Henriette's names database
[E] Ethnobotany Data (common names, uses, countries) from the Ethnobotany Database.

References for Equisetum hyemale var. affine (a possible synonym).

[B] Data (Latin & Common names, other references) from the BONAP's Synonymized Checklist of the Vascular Flora of the United States, Puerto Rico, and the Virgin Islands.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.

References for equisetum hyemale (a possible synonym).

[HP] PhotoFrom Henriette's plant pictures
[HP] PhotoFrom Henriette's plant pictures

See the PFAF Links Pages for other sources.

Also try Photos and info from the The Plants Database which has 14,000 images.

References

[1] F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaces in 1992 by a new dictionary (see [200]).

[4] Grieve. A Modern Herbal. Penguin 1984 ISBN 0-14-046-440-9
Not so modern (1930's?) but lots of information, mainly temperate plants.

[14] Holtom. J. and Hylton. W. Complete Guide to Herbs. Rodale Press 1979 ISBN 0-87857-262-7
A good herbal.

[17] Clapham, Tootin and Warburg. Flora of the British Isles. Cambridge University Press 1962
A very comprehensive flora, the standard reference book but it has no pictures.

[46] Uphof. J. C. Th. Dictionary of Economic Plants. Weinheim 1959
An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.

[54] Hatfield. A. W. How to Enjoy your Weeds. Frederick Muller Ltd 1977 ISBN 0-584-10141-4
Interesting reading.

[61] Usher. G. A Dictionary of Plants Used by Man. Constable 1974 ISBN 0094579202
Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.

[65] Frohne. D. and Pfänder. J. A Colour Atlas of Poisonous Plants. Wolfe 1984 ISBN 0723408394
Brilliant. Goes into technical details but in a very readable way. The best work on the subject that I've come across so far.

[74] Komarov. V. L. Flora of the USSR. Israel Program for Scientific Translation 1968
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.

[85] Harrington. H. D. Edible Native Plants of the Rocky Mountains. University of New Mexico Press 1967 ISBN 0-8623-0343-9
A superb book. Very readable, it gives the results of the authors experiments with native edible plants.

[99] Turner. N. J. Plants in British Columbian Indian Technology. British Columbia Provincial Museum 1979 ISBN 0-7718-8117-7
Excellent and readable guide.

[147] ? A Barefoot Doctors Manual. Running Press ISBN 0-914294-92-X
A very readable herbal from China, combining some modern methods with traditional chinese methods.

[172] Schofield. J. J. Discovering Wild Plants - Alaska, W. Canada and the Northwest.
A nice guide to some useful plants in that area.

[176] Yeung. Him-Che. Handbook of Chinese Herbs and Formulas. Institute of Chinese Medicine, Los Angeles 1985
A very good Chinese herbal.

[177] Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books 1984 ISBN 3874292169
An excellent book for the dedicated. A comprehensive listing of latin names with a brief list of edible parts.

[178] Stuart. Rev. G. A. Chinese Materia Medica. Taipei. Southern Materials Centre
A translation of an ancient Chinese herbal. Fascinating.

[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992 ISBN 0-333-47494-5
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.

[213] Weiner. M. A. Earth Medicine, Earth Food. Ballantine Books 1980 ISBN 0-449-90589-6
A nice book to read though it is difficult to look up individual plants since the book is divided into separate sections dealing with the different medicinal uses plus a section on edible plants. Common names are used instead of botanical.

[218] Duke. J. A. and Ayensu. E. S. Medicinal Plants of China Reference Publications, Inc. 1985 ISBN 0-917256-20-4
Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.

[238] Bown. D. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London. 1995 ISBN 0-7513-020-31
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.

[257] Moerman. D. Native American Ethnobotany Timber Press. Oregon. 1998 ISBN 0-88192-453-9
Very comprehensive but terse guide to the native uses of plants. Excellent bibliography, fully referenced to each plant, giving a pathway to further information. Not for the casual reader.

Readers Comments

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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
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