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Nuphar polysepala - Engelm.

Common Name Spatterdock, Rocky Mountain pond-lily
Family Nymphaeaceae
USDA hardiness 4-8
Known Hazards None known
Habitats Ponds, shallow lakes and slow-flowing rivers[60, 187], from valleys to almost 3,000 metres in the mountains[212].
Range Western N. America - Alaska to California.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Water Plants Semi-shade Full sun
Nuphar polysepala Spatterdock, Rocky Mountain pond-lily


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Nuphar polysepala Spatterdock, Rocky Mountain pond-lily

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Summary


Physical Characteristics

 icon of manicon of flower
Nuphar polysepala is a PERENNIAL growing to 1.8 m (6ft).
It is hardy to zone (UK) 4. It is in flower from Jul to August. The species is hermaphrodite (has both male and female organs) and are pollinated by Flies, beetles. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It can grow in water.

Synonyms

N. lutea polysepala. (Engelm.)E.O.Beal.

Habitats

 Pond;

Edible Uses

Edible Parts: Root;  Seed.
Edible Uses:

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



Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

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].

Other Names

If available other names are mentioned here

Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Nuphar advenaCommon Spatterdock, Yellow pond-lily, Varigated yellow pond-lily32
Nuphar japonicum 31
Nuphar luteaYellow Water Lily, Yellow pond-lily, Rocky Mountain pond-lily, Varigated yellow pond-lily32
Nuphar pumilaYellow pond-lily31

 

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Expert comment

Author

Engelm.

Botanical References

60200

Links / References

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Subject : Nuphar polysepala  
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