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Ceratophyllum demersum - L.

Common Name Hornwort, Coon's tail
Family Ceratophyllaceae
USDA hardiness 7-10
Known Hazards None known
Habitats Ponds and ditches[17].
Range Most of Europe, including Britain, but absent from the Arctic.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Frost Hardy Wet Soil Water Plants Semi-shade Full sun
Ceratophyllum demersum Hornwort,  Coon


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Ceratophyllum demersum Hornwort,  Coon
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Summary


Physical Characteristics

 icon of manicon of flower
Ceratophyllum demersum is a PERENNIAL growing to 1 m (3ft 3in) at a fast rate.
It is hardy to zone (UK) 8. It is in flower from Jul to September. The species is monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and are pollinated by Water. 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 prefers wet soil and can grow in water.

Synonyms

Habitats

 Pond; Bog Garden;

Edible Uses

Edible Parts: Leaves.
Edible Uses:

Leaves[105, 177]. No further details are given.

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.

Antiperiodic;  Stings.

The plant is a cooling antiperiodic[240]. It is useful in the treatment of biliousness and scorpion stings[240].

Other Uses

None known

Cultivation details

Prefers a sandy medium rich in decaying organic matter in full sun, but it tolerates shade better than most submerged aquatic plants[188]. A good pond oxygenator, it usually grows submerged in the water but is sometimes found floating on the surface[1, 188]. This species belongs to one of only two known dicot genera where pollination taks place under water. The anthers of male flowers break off the plant and float to the surface where they release their pollen grains. These then sink under the water to fertilize the female flowers[274]. This species, however, more commonly reproduces asexually[274]. In some parts of the world bilharzia-carrying snails and malaria-carrying mosquito larvae shelter in the leaves of plants of this genus. The plants can also grow so vigorously as to choke waterways, though they also provide good shelter for young fish[274]. The plant is very brittle[1].

Propagation

Seed - we have no details on this species but would suggest sowing the seed as soon as it is ripe in early autumn in a greenhouse with the pot immersed in water. It is likely that the seed will quickly lose viability if allowed to dry out so if it is stored it should be kept cool in a container of water and then be sown in late winter. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in a tray of water in the greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Cuttings in the growing season root easily[188]. Plants propagate themselves naturally when scaly young shoots or winter buds separate from the main plant[188].

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

 

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Expert comment

Author

L.

Botanical References

17200

Links / References

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Subject : Ceratophyllum demersum  
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