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Botanical Name: Nuphar lutea
Species: N. lutea
Synonyms: Nuphar lutea advena. (Ait.)Kartesz.&Gandhi.
Common Names: Yellow Water-lily, Brandy-Bottle, Common Spatterdock, Yellow pond-lily, Varigated yellow pond-lily
Habitat:Nuphar lutea is native to Southeastern N. America – Labrador and Nova Scotia, south to Florida, Texas and Utah.It grows in ponds, lakes, sluggish streams and rivers, springs, marshes, ditches, canals, sloughs, and tidal waters from sea level to 450 metres.
Nuphar lutea is a perennial aqqatic plant. The plant grows with its roots in the sediment and its leaves floating on the water surface; it can grow in water up to 5 metres deep.It is usually found in shallower water than the white water lily, and often in beaver ponds
It is in flower from Jul to August.Since the flooded soils are deficient in oxygen, aerenchyma in the leaves and rhizome transport oxygen to the rhizome. Often there is mass flow from the young leaves into the rhizome, and out through the older leaves. The rhizomes are often consumed by muskrats. The flower is solitary, terminal, held above the water surface; it is hermaphrodite, 2–4 cm diameter, with five or six large bright yellow sepals and numerous small yellow petals largely concealed by the sepals. Flowering is from June to September, and pollination is entomophilous, by flies attracted to the alcoholic scent. The flower is followed by a green bottle-shaped fruit, containing numerous seeds which are dispersed by water currents. The species is less tolerant of water pollution than water-lilies in the genus Nymphaea.
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The flowers are hermaphrodite (have 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.
A water plant requiring a rich soil and a sunny position. It is best if grown in still water that is up to 60cm deep but it also tolerates slow moving water. Succeeds in light shade. A very ornamental plant. Nuphar advena is extremely variable and intergrades with N . orbiculata , N . ulvacea , and N . sagittifolia in areas where their ranges overlap.
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. Division in May. Each portion must have at least one eye. Submerge in pots in shallow water until established.
Root – raw or cooked. The root can be soaked in water in order to remove a bitter taste. After long boiling, it has a taste like sheep’s liver. The root can also be dried and ground into a powder then used as a thickener in soups, or can be added to cereal flours when making bread, cakes etc. Seed – raw or cooked. It can be roasted, then ground into a powder and eaten raw or used to thicken soups etc. The seed can also be toasted like popcorn.
The rhizomes are used medicinally. They are currently being investigated for their physiological effects. In small doses these constituents have a cardiotonic action and they are included in certain pharmaceutical preparations prescribed in Europe. They affect the central nervous system and in large amounts they may cause paralysis. Yellow Water lily is not used in herbal medicine but tinctures are used in homeopathy. It should be used only under medical supervision. A tea made from the roots is used in the treatment of ‘sexual irritability’, blood diseases, chills etc. The root is poulticed and applied to swellings, inflammations, cuts etc. The root contains steroids and is a folk remedy for infertility.
The pulverized dried rhizomes have been used to arrest bleeding. A tea made from the roots is used in the treatment of dysentery, diarrhoea etc. A poultice made from the roots is used in the treatment of swellings, boils, tumours, inflamed skin etc.
Disclaimer : The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplement, it is always advisable to consult with your own health care provider.