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Sagittaria rigida

Common name:		Family:	Alismataceae
Author:	Pursh.	Botanical references:	17, 43, 200
Synonyms:
Known Hazards:	None known
Range:	Eastern N. America - Quebec to Minnesota and southwards. Naturalized in Britain in S.W. England[17].
Habitat:	Calcareous or brackish mud or water[43]
Edibility Rating (1-5):	4	Medicinal Rating (1-5):	0

Other Common Names:	From various places around the Web, may not be correct. See below.
	Sessile-fruit Arrowhead [B], Sessilefruit Arrowhead [P],
Epithets:	From a Dictionary of Botanical Epithets
	rigida = rigid
Systematics:	From a USDA Plants Database
	Order: Alismatales. Water-plantain family

Physical Characteristics

Perennial growing to 0.15m. It is hardy to zone 7. The flowers are monoecious (individual flowers are either male or female, but both sexes can be found on the same plant). We rate it 4/5 for edibility and 0/5 for medicinal use.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils. The plant prefers acid, neutral and basic (alkaline) soils and can grow in saline soil. It cannot grow in the shade. It requires wet soil and can grow in water.

Habitats and Possible Locations

Pond, Bog Garden.

Edible Uses

Root.

Root - cooked[177]. Tastes like potatoes[183].

Medicinal Uses

Disclaimer

None known

Other Uses

None known

Cultivation details

A pond or bog garden plant, it requires a moist or wet loamy soil in a sunny position[1, 200]. Prefers shallow, still or slowly flowing water up to 30 - 60cm deep. Plants can succeed in deep water[43].

Propagation

Seed - best sown as soon as it is ripe in a pot standing in about 5cm of water. Prick out the seedlings into individual pots when they are large enough to handle, and gradually increase the depth of water as the plants grow until it is about 5cm above the top of the pot. Plant out in late spring or early summer of the following year.
Division of the tubers in spring or autumn. Easy.
Runners potted up at any time in the growing season.

Suppliers

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

Web References

[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.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database

References for the family Alismataceae.

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

[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]).

[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.

[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.

[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.

[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.

Readers Comments

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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
WEB search engine by Rich Morris - Home Page- Contact Info
Blagdon Cross, Ashwater, Beaworthy, Devon, EX21 5DF, UK.
Website: www.pfaf.org Phone: 0845 458 4719/_44(0) 1208 872963

This page (UK) http://www.comp.leeds.ac.uk/cgi-bin/pfaf/arr_html?Sagittaria+rigida
This page (US) http://www.ibiblio.org/pfaf/cgi-bin/arr_html?Sagittaria+rigida

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