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Spirodela polyrrhiza
  • Great Duckweed

a perennial member of the Spirodela genus in the family Lemnaceae.

248px
Niche
  • Unknown
    Unknown
    The ecosystem niches for this plant are unknown. Do you know them? Click the edit button to add them!
Functions
  • None
    None
    There are no functions defined for this plant. Do you know of some? Click the edit button to add them!
Light
  • Full sun
    Full sun
    The amount of sun exposure that a plant prefers in ideal conditions.
    Key
  • no shade
    No shade
    The amount of shade a plant will tolerate without adverse health affects.
    Key
Water
  • Water Requirementsaquatic
    Aquatic
    The amount of water a plant needs for healthy growth, relative to other plants.
    Key
Soil
  • acid,neutral,alkaline
    Unknown
    The PH range (acidity or alkilinity) of the growth medium ideal for healthy nutrient absorbtion.
    Key
  • Sandy to Clay
    The soil texture this plant prefers for optimal growth.
    Key
Cold & Heat
  • 5
    Zone 5
    The USDA Hardiness scale assigns plants a number from 1 to 12 representing the minimum temperature a plant can survive.
    Key
    0< -53.9ºC< -65ºF
    1-51.1ºC-60ºF
    2-45.6ºC-50F
    3-40ºC-40ºF
    4-34.4ºC-30ºF
    5-28.9ºC-20ºF
    6-23.3ºC-10ºF
    7-17.8ºC0ºF
    8-12.2C10ºF
    9-6.7ºC20ºF
    10-1.1ºC30ºF
    114.4ºC40ºF
    12> 10ºC> 5ºF
  • ?
    Unknown
    The AHS Heat scale assigns plants a number from 1 to 12 representing the number of days per year a plant requires a temperature exceeding 30ºC (86ºF).
    Key
    11
    21 - 7
    38 - 14
    415 - 30
    531 - 45
    646 - 60
    761 - 90
    891 - 120
    9121 - 150
    10151 - 180
    11181 - 210
    12181 - 210
Spirodela polyrrhiza has 0 edible uses listed
Spirodela polyrrhiza has 0 medicinal uses listed

Uses

Edible uses

Notes

The plant is sometimes used as a food[1][2]. No more details are given.

Leaves

Unknown use

Material uses

There are no material uses listed for Spirodela polyrrhiza.

Medicinal uses(Warning!)

The whole plant is antipruritic, antipyretic, cardiotonic, carminative, diaphoretic, diuretic[3][4][5]. It stimulates the appearance of measles rash[3][4]. It is used in the treatment of colds, measles, oedema and difficulty in urination[4].

Unknown part

Antipruritic
Antipyretic
Cardiotonic
Carminative
Diaphoretic
Diuretic

Ecology

Ecosystem niche/layer

Ecological Functions

Nothing listed.

Forage

Nothing listed.

Shelter

Nothing listed.

Propagation

The plant divides freely in the growing season and does not need help.

Practical Plants is currently lacking information on propagation instructions of Spirodela polyrrhiza. Help us fill in the blanks! Edit this page to add your knowledge.



Cultivation

Requires a sunny position in still water that is rich in nitrates and lime[6]. A very small plant without differentiation into various parts such as leaf, stem etc (they are called Thalli), it is 8mm in diameter and often forming a mat on the water surface and perennating by means of buds (turions) that sink in autumn and rise to the surface in spring. The so-called rootcap (really only an apical swelling), has a higher specific gravity than any other part of the plant, righting capsized individuals[6].

Crops

Problems, pests & diseases

Associations & Interactions

There are no interactions listed for Spirodela polyrrhiza. Do you know of an interaction that should be listed here? edit this page to add it.

Polycultures & Guilds

There are no polycultures listed which include Spirodela polyrrhiza.

Descendants

Cultivars

Varieties

None listed.

Subspecies

None listed.

Full Data

This table shows all the data stored for this plant.

Taxonomy
Binomial name
Spirodela polyrrhiza
Genus
Spirodela
Family
Lemnaceae
Imported References
Edible uses
[1][2]
Medicinal uses
[3][4][5]
Material uses & Functions
Botanic
[7][6]
Propagation
Cultivation
Environment
Cultivation
Uses
Edible uses
None listed.
Material uses
None listed.
Medicinal uses
None listed.
Functions & Nature
Functions
Provides forage for
Provides shelter for
Environment
Hardiness Zone
5
Heat Zone
?
Water
aquatic
Sun
full sun
Shade
no shade
Soil PH
acid, neutral, alkaline
Soil Texture
sandy, loamy, clay
Soil Water Retention
Environmental Tolerances
    Ecosystems
    Native Climate Zones
    None listed.
    Adapted Climate Zones
    None listed.
    Native Geographical Range
    None listed.
    Native Environment
    None listed.
    Ecosystem Niche
    None listed.
    Root Zone Tendancy
    None listed.
    Life
    Deciduous or Evergreen
    ?
    Herbaceous or Woody
    ?
    Life Cycle
    perennial
    Growth Rate
    vigorous
    Mature Size
    0.01 x 0.05 meters
    Fertility
    ?
    Pollinators
    ?
    Flower Colour
    ?
    Flower Type
    monoecious

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    "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki. "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki.


    "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki.

    "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki.

    "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki., "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki., "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki. "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki., "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki., "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki.

    "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki.






    References

    1. ? 1.01.1 Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books ISBN 3874292169 (1984-00-00)
    2. ? 2.02.1 Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications ISBN 0-9628087-0-9 (1990-00-00)
    3. ? 3.03.13.2 ? A Barefoot Doctors Manual. Running Press ISBN 0-914294-92-X ()
    4. ? 4.04.14.24.3 Yeung. Him-Che. Handbook of Chinese Herbs and Formulas. Institute of Chinese Medicine, Los Angeles (1985-00-00)
    5. ? 5.05.1 Duke. J. A. and Ayensu. E. S. Medicinal Plants of China Reference Publications, Inc. ISBN 0-917256-20-4 (1985-00-00)
    6. ? 6.06.16.2 Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press ISBN 0-333-47494-5 (1992-00-00)
    7. ? Clapham, Tootin and Warburg. Flora of the British Isles. Cambridge University Press (1962-00-00)

    "image:SpirodelaPolyrhiza.jpg|248px" cannot be used as a page name in this wiki.

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    Facts about "Spirodela polyrrhiza"RDF feed
    Article is incompleteYes +
    Article requires citationsNo +
    Article requires cleanupYes +
    Belongs to familyLemnaceae +
    Belongs to genusSpirodela +
    Has common nameGreat Duckweed +
    Has drought toleranceIntolerant +
    Has edible partLeaves +
    Has edible useUnknown use +
    Has flowers of typeMonoecious +
    Has growth rateVigorous +
    Has hardiness zone5 +
    Has imageSpirodelaPolyrhiza.jpg +
    Has lifecycle typePerennial +
    Has mature height0.01 +
    Has mature width0.05 +
    Has medicinal partUnknown part +
    Has medicinal useAntipruritic +, Antipyretic +, Cardiotonic +, Carminative +, Diaphoretic + and Diuretic +
    Has primary imageSpirodelaPolyrhiza.jpg +
    Has search namespirodela polyrrhiza + and x +
    Has shade toleranceNo shade +
    Has soil ph preferenceAcid +, Neutral + and Alkaline +
    Has soil teclayture preferenceClay +
    Has soil teloamyture preferenceLoamy +
    Has soil tesandyture preferenceSandy +
    Has sun preferenceFull sun +
    Has taxonomy nameSpirodela polyrrhiza +
    Has water requirementsaquatic +
    Is taxonomy typeSpecies +
    Tolerates nutritionally poor soilNo +
    Uses mature size measurement unitMeters +