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Cyperus rotundus

Common name:	Nut Grass	Family:	Cyperaceae
Author:	L.	Botanical references:	43, 50, 200
Synonyms:	Pycreus rotundus ((L.)Hayek.), Cyperus hexastachyos
Known Hazards:	None known
Range:	S. and W. Europe, Tropical areas.
Habitat:	Roadsides, sandy fields and cultivated ground in Eastern North America[43]. Plants are usually only found in damp places[238].
Edibility Rating (1-5):	3	Medicinal Rating (1-5):	3

Other Possible Synonyms:	From various places across the web, may not be correct. See below.
	C. hexastachys[H]
Other Common Names:	From various places around the Web, may not be correct. See below.
	Boeai [E], Ching San Leng [E], Galingale [H], Hama-Suge [E], Hsiang Fu [E], Hsiang Fu Tzu [E], Mootha [H], Mota [E], Muskezamin [E], Musta [E], Mustaka [E], Mutha [E], Nutgrass [P], Purple Flat Sedge [B], Roekoet Teki [E], So Ken Chiu [E], So Ts'Ao [E], Souchet [E], Tage-tage [E], Teki [E], Topalak [E], Woeta [E],
Epithets:	From a Dictionary of Botanical Epithets
	rotundus = round;
Systematics:	From a USDA Plants Database
	Order: Cyperales. Sedge family
Other Range Info:	From the Ethnobotany Database
	Bahamas; China; Egypt; France; India; Iran; Japan; Java; Samoa; Sanscrit; Sudan; Turkey; Venezuela
Noxious, Invasive and Injurious Weeds	From USDA PLANTS database, Weeds Australia , DEFRA Injurious Weeds
	Listed as noxious/invasive for: California, Oregon, South Australia.

Physical Characteristics

Perennial growing to 0.6m by 1m . . The scented flowers are hermaphrodite (have both male and female organs). We rate it 3/5 for edibility and 3/5 for medicinal use.

The plant prefers light (sandy) and medium (loamy) soils. The plant prefers acid, neutral and basic (alkaline) soils. It cannot grow in the shade. It requires moist or wet soil.

Habitats and Possible Locations

Bog Garden.

Edible Uses

Root; Seed.

Tuber - raw or cooked[2, 85, 105, 183, 272]. A very strong flavour when freshly harvested, said to resemble 'Vick's VapoRub', the tubers become milder if they are allowed to dry[183]. A pleasant nutty flavour according to another report[95] whilst another says that the roots are very unpalatable raw and a little better but still not very palatable when cooked[144]. The dried roots can be ground into a powder and used as a cereal[257].
Seed. A famine food, used when all else fails[177]. It is very small and would be fiddly to use[K].

Medicinal Uses

Disclaimer

Analgesic; Antibacterial; Antibiotic; Antispasmodic; Antitussive; Aromatic; Astringent; Carminative; Contraceptive; Diaphoretic; Diuretic; Emmenagogue; Lithontripic; Sedative; Skin; Stimulant; Stomachic; Tonic; Vermifuge.

Nut grass is a pungent bitter-sweet herb that relieves spasms and pain, acting mainly on the digestive system and uterus[238]. The roots and tubers are analgesic, antibacterial, antispasmodic, antitussive, aromatic, astringent, carminative, diaphoretic, diuretic, emmenagogue, litholytic, sedative, skin, stimulant, stomachic, tonic and vermifuge[116, 145, 147, 152, 176, 218, 238, 240, 279]. They are used internally in the treatment of digestive problems and menstrual complaints[238]. They are commonly combined with black pepper (Piper nigrum) in the treatment of stomachaches[272]. The roots are harvested in the summer or winter and are dried for later use[238].
An essential oil in the tubers has antibiotic activity and has been shown to arrest the growth of Micrococcus pyrogenes[240].
The plant is rated 8th amongst 250 potential antifertility plants in China[218].
The plant is used in the treatment of cervical cancer[218].

We have a more details factsheet on the history and medicinal use of this plant. Email webmaster@pfaf.org for details.

Other Uses

Essential; Weaving.

The leaves are used in basketry and for weaving hats, matting etc[178].
The aromatic root is used for perfumery in India[4, 61, 145]. When dried and ground into a fine powder it is used like talcum powder[245].

Cultivation details

Prefers a moist sandy loam[95, 117] and a sunny position[238].
We do not know how hardy this plant will be in Britain, one report says that it is frost-tender[238], but it is found growing wild in areas of N. America that do experience frost[43].
This plant is sometimes cultivated for its edible tubers in Tropical regions[1], however it is a serious weed of agricultural land in the tropics where it spreads rapidly at the roots[61] and is considered to be one of the world's most damaging weeds[200, 238]. It is subject to statutory control in several countries[238].

Propagation

Seed - surface sow in the spring and keep the compost moist[164]. The seed usually germinates in 2 - 6 weeks at 18°c[164]. Prick out the seedlings into individual pots as soon as they are large enough to handle. Grow on for their first winter in a greenhouse and plant them out in late spring after the last expected frosts.
Division in spring or autumn. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring.

Scent

Root: Crushed Dried: The root, when dried, is very aromatic with a smell resembling that of sweet flag, Acorus calamus.

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
[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.
[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[PHARM] Phytochemical Data (common names, uses, countries) from Dr Duke's Phytochemical Database.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database
[R] Rainforest medicinal Data (common names, medicinal uses, images) from the Rain-Tree.

References for Cyperus hexastachys (a possible synonym).

[H] Details of Scandanavian and European Common names in Henriette's names database

References for the family Cyperaceae.

To be included in the Flora of China.

See the PFAF Links Pages for other sources.

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

References

[K] Ken Fern
Notes from observations, tasting etc at Plants For A Future and on field trips.

[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]).

[2] Hedrick. U. P. Sturtevant's Edible Plants of the World. Dover Publications 1972 ISBN 0-486-20459-6
Lots of entries, quite a lot of information in most entries and references.

[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.

[43] Fernald. M. L. Gray's Manual of Botany. American Book Co. 1950
A bit dated but good and concise flora of the eastern part of N. America.

[50] ? Flora Europaea Cambridge University Press 1964
An immense work in 6 volumes (including the index). The standard reference flora for europe, it is very terse though and with very little extra information. Not for the casual reader.

[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.

[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.

[95] Saunders. C. F. Edible and Useful Wild Plants of the United States and Canada. Dover Publications 1976 ISBN 0-486-23310-3
Useful wild plants of America. A pocket guide.

[105] Tanaka. T. Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing 1976
The most comprehensive guide to 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.

[116] Brooklyn Botanic Garden Oriental Herbs and Vegetables, Vol 39 No. 2. Brooklyn Botanic Garden 1986
A small booklet packed with information.

[117] Rosengarten. jnr. F. The Book of Edible Nuts. Walker & Co. 1984 ISBN 0802707699
A very readable and comprehensive guide. Well illustrated.

[144] Cribb. A. B. and J. W. Wild Food in Australia. Fontana 1976 ISBN 0-00-634436-4
A very good pocket guide.

[145] Singh. Dr. G. and Kachroo. Prof. Dr. P. Forest Flora of Srinagar. Bishen Singh Mahendra Pal Singh 1976
A good flora of the western Himalayas but poorly illustrated. Some information on plant uses.

[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.

[152] Lassak. E. V. and McCarthy. T. Australian Medicinal Plants.
A very good and readable guide to the subject.

[164] Bird. R. (Editor) Growing from Seed. Volume 4. Thompson and Morgan. 1990
Very readable magazine with lots of information on propagation. A good article on Yuccas, one on Sagebrush (Artemesia spp) and another on Chaerophyllum bulbosum.

[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.

[183] Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications 1990 ISBN 0-9628087-0-9
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.

[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.

[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.

[240] Chopra. R. N., Nayar. S. L. and Chopra. I. C. Glossary of Indian Medicinal Plants (Including the Supplement). Council of Scientific and Industrial Research, New Delhi. 1986
Very terse details of medicinal uses of plants with a wide range of references and details of research into the plants chemistry. Not for the casual reader.

[245] Genders. R. Scented Flora of the World. Robert Hale. London. 1994 ISBN 0-7090-5440-8
An excellent, comprehensive book on scented plants giving a few other plant uses and brief cultivation details. There are no illustrations.

[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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We make no claims of magical effects or supernatural powers for any item in this catalog. In spite of legendary attributes or occult and craft tradition, such items are offered as curios only and beliefs concerning their magical effectiveness are related only for historical interest.