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Zannichellia palustris
Also called Horned Poolmat
Horned pondweed is a small submerged aquatic plant of fresh to brackish water, with thread-like leaves and horned seeds. It grows in shallow ponds, ditches and slow water, and is rarely grown as an ornamental, so care is mainly about keeping it submerged in clean, still or slow water.
Zannichellia palustris, the horned pondweed, is a plant found in fresh to brackish waters in the United States (especially in the Chesapeake Bay), Europe, Asia, Australasia, and South America. It is recognizable by its long, thread-like leaves and "stringy" appearance. Its roots are long and tendril-like, and its seeds bear a distinctive horned shape, hence the common name.
The species epithet palustris is Latin for "of the marsh" and indicates its common habitat. A diploid, its chromosome number was confirmed as 2n = 24.
Text excerpted from the Wikipedia article Zannichellia palustris by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
