Zannichellia palustris - Horned Pondweed

Family:	Zannichelliaceae
Habit:	Perennial
Height:	0.5
Synonyms:	Z. aschersoniana. Graebn.
Range:	A cosmopolitan plant, found in most areas of the world, including Britain.

Zannichellia palustris (Horned Pondweed) is a Perennial which grows to a height of 0.5m . It has a hardness rating of 2.
The flowers from this plant are monoecious (both sexes are found on the plant but each flower is either male or female) and they are pollinated by Water

Soil Information

Horned Pondweed will grow in light (sandy),medium (loamy),hard (clay) soil. It is not necessary for the soil to be well drained.
The soil prefers the following PH / acid levels :
- pH of less than 6, Acidic soils
- pH between 6 and 8, Neutral soils
- pH greater than 8, Basic soils
Horned Pondweed prefers soils

Ideal Planting Locations

Horned Pondweed can grow in semi or areas with no shade.

Still or slow-flowing fresh water, or in brackish water[200].

Planting places suited to this plant described below.

• Is a pond plant

Cultivation Details

A submerged water plant, it is a useful oxygenator for cool water ponds[200].

Edible Uses*

* See disclaimer
Edible Rating: 0/5
None known

Medicinal Uses*

* See disclaimer
Medicinal Rating: 0/5
None known

Propagation

Seed - we have no information for this species but suggest sowing the seed as soon as it is ripe in a pot submerged in water. The seed is likely to have a short viability if allowed to become dry. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer. Division is easy at almost any time in the growing season[200].

Known Hazards

None known

Other Uses

This plant has proved to be valuable for stabilizing muddy banks and in the purification of polluted water[200].

• Pollution - Plants used to combat pollution.
• Soil stabilization - Plants that can be grown in places such as sand dunes in order to prevent erosion by wind, water or other agents.

Cultivars

no recorded cultivars

References

Flora of the British Isles.
Clapham, Tootin and Warburg.
Author: Clapham, Tootin and Warburg.
Rating:
Publisher : A very comprehensive flora, the standard reference book but it has no pictures.
Date of Publication : 1962

The New RHS Dictionary of Gardening. 1992.
Huxley. A.
Author: Huxley. A.
Rating:
Publisher : Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
Date of Publication : 1992

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