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Nuphar polysepala

Common name:	Spatterdock	Family:	Nymphaeaceae
Author:	Engelm.	Botanical references:	60, 200
Synonyms:	Nuphar lutea polysepala ((Engelm.)E.O.Beal.)
Known Hazards:	None known
Range:	Western N. America - Alaska to California.
Habitat:	Ponds, shallow lakes and slow-flowing rivers[60, 187], from valleys to almost 3,000 metres in the mountains[212].
Edibility Rating (1-5):	3	Medicinal Rating (1-5):	1

Other Possible Synonyms:	From various places across the web, may not be correct. See below.
	N. lutea ssp. polysepala[B,P] N. lutea subsp. polysepala[G] N. polysepalum[E] Nymphaea polysepala[B,P] Nymphozanthus polysepalus[B,P]
Other Common Names:	From various places around the Web, may not be correct. See below.
	Rocky Mountain Pondlily [P],
Systematics:	From a USDA Plants Database
	Order: Nymphaeales. Water-lily family
Other Range Info:	From the Ethnobotany Database
	Canada(Kwakiutl)

Physical Characteristics

Perennial growing to 1.8m. It is hardy to zone 4. It is in flower from July to August. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Flies. We rate it 3/5 for edibility and 1/5 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 can grow in water.

Habitats and Possible Locations

Pond.

Edible Uses

Root Seed.

Root - raw or cooked[2, 161]. Boiled or baked[2, 85, 94]. The root can also be dried and ground into a flour[85]. The rather strong taste can be removed by soaking the root in water prior to use[85]. The N. American Indians used the roots in times of famine[212].
Seed - raw or cooked[2, 46, 61, 101, 161]. The fairly large seed can be dried and ground into a powder and then be used for making porridge or mixed with other flours for making bread[94, 172]. When roasted it resembles popcorn in flavour[212].

Medicinal Uses

Disclaimer

Analgesic Haemostatic Poultice.

The root is analgesic and antihaemorrhagic[257]. A decoction is taken in the treatment of pain in any part of the body, and for lung haemorrhages, TB etc[257].
A poultice made from the root is used in the treatment of any pain, rheumatic joints, sores etc[257].

Other Uses

None known

Cultivation details

A water plant requiring a rich soil and a sunny position[1, 56]. It is best grown in still water up to 75cm deep but it also tolerates slow moving water[200]. Succeeds in light shade[200].
Plants are hardy to about -20° c[187].

Propagation

Seed - sow as soon as it is ripe in a greenhouse in pots submerged under 25mm of water. Prick out into individual pots as soon as the first true leaf appears and grow them on in water in a greenhouse for at least two years before planting them out in late spring.
The seed is collected by wrapping the developing seed head in a muslin bag to avoid the seed being lost. Harvest it 10 days after it sinks below the soil surface or as soon as it reappears[200].
Division in May. Each portion must have at least one eye. Submerge in pots in shallow water until established[56].

Suppliers

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

PFAF Web Pages

This plant is mentioned in the following web pages

The Edible Pond and Bog Garden

Web References

[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 Nuphar lutea ssp. polysepala (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 Nuphar polysepalum (a possible synonym).

[E] Ethnobotany Data (common names, uses, countries) from the Ethnobotany Database.

References for the family Nymphaeaceae.

[CHINA] Data Very detailed botanical/identification info. from 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]).

[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.

[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.

[56] Muhlberg. H. Complete Guide to Water Plants. E. P. Publishing Ltd. 1982 ISBN 0-7158-0789-7
Deals with a wide range of plants for temperate areas (and indoor aquaria) with quite a lot of information on cultivation techniques.

[60] Hitchcock. C. L. Vascular Plants of the Pacific Northwest. University of Washington Press 1955
A standard flora for Western N. America with lots of information on habitat etc. Five large volumes, it is 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.

[94] Sweet. M. Common Edible and Useful Plants of the West. Naturegraph Co. 1962 ISBN 0-911010-54-8
Useful wild plants in Western N. America. A pocket guide.

[101] Turner. N. J. and Szczawinski. A. Edible Wild Fruits and Nuts of Canada. National Museum of Natural Sciences 1978
A very readable guide to some wild foods of Canada.

[161] Yanovsky. E. Food Plants of the N. American Indians. Publication no. 237. U.S. Depf of Agriculture.
A comprehensive but very terse guide. Not for the casual reader.

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

[187] Phillips. R. & Rix. M. Perennials Volumes 1 and 2. Pan Books 1991 ISBN 0-330-30936-9
Photographs of over 3,000 species and cultivars of ornamental plants together with brief cultivation notes, details of habitat etc.

[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.

[212] Craighead. J., Craighead. F. and Davis. R. A Field Guide to Rocky Mountain Wildflowers The Riverside Press 1963 ISBN 63-7093
Excellent little pocket guide to the area, covering 590 species and often giving details of their uses.

[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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