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Hornleaf riverweed

Podostemum ceratophyllum

Also called Threadfoot, Horn Leaved Riverweed, Riffleweed

Hornleaf riverweed
Photo: simonpesant, CC BY 4.0

Hornleaf riverweed is a submerged aquatic plant that anchors to rocks in fast-flowing streams and rivers in eastern North America and the Caribbean. It is grown only in aquariums or water gardens with strong flow and clean, oxygen-rich water.

Family
Podostemaceae (Podostem family)
Grows as
Aquatic
Light
Part shade, Bright indirect
Water
Keep fully submerged in fast-moving, well-oxygenated water; it cannot be watered like a land plant.
Soil
Attaches to hard rock or stone rather than soil; a rough, rocky substrate suits it.
Temperature
Cool to moderate water temperatures typical of temperate rivers; protect from warm stagnant water.
How easy
Hard
Native range
E. Canada to E. U.S.A., Honduras, Hispaniola
Climate
temperate

About

Podostemum ceratophyllum, commonly known as the hornleaf riverweed, is a species of submerged aquatic plant in the family Podostemaceae. It is native to eastern North America where it grows on hard bottoms in swiftly flowing rivers and streams and is considered a foundation species.

Where it grows

Podostemum ceratophyllum is found in eastern North America. Its range extends from Ontario and Quebec southwards to Ohio, Kentucky, Tennessee, Louisiana, Mississippi, Alabama and Georgia. It also occurs in the Dominican Republic and in Honduras. It grows in fast flowing rivers and streams on rocky substrates at altitudes up to about 800 m (2,600 ft). It is a foundation species in mid-sized montane and piedmont rivers.

Other Podostemum plants

Riverweed

Text excerpted from the Wikipedia article Podostemum ceratophyllum 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.

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