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Knotgrass

Paspalum distichum

Also called Buffalo Quick Paspalum, Couch Paspalum, Mercer Grass, Water Couch, Water Finger Grass, Thompson Grass, Eternity Grass

Knotgrass
Photo: John Robert McPherson, CC BY-SA 4.0

Knotgrass is a perennial grass that forms clumps and spreads by rhizomes and stolons, often growing in wet or waterlogged ground. It is a fast, tough spreader, so control it where it is not wanted.

Family
Poaceae (Grass family)
Grows as
Grass, Perennial
Light
Full sun, Part shade
Water
Keeps moist to wet soil and tolerates standing water or flooding.
Soil
Tolerates a wide range of soils, including heavy and waterlogged ground.
Temperature
Warm climate plant; tolerates warm tropical and subtropical conditions and is damaged by hard frost.
How easy
Easy
Native range
U.S.A. to Trop. & Subtrop. America
Climate
seasonally dry tropical

About

Paspalum distichum is a species of grass. Common names include knotgrass, water finger-grass, couch paspalum, eternity grass, gingergrass, and Thompson grass. Its native range is obscure because it has long been present on most continents, and in most areas it is certainly an introduced species. Its native range probably includes parts of the tropical Americas.

This is a perennial grass forming clumps and spreading via rhizomes and stolons. It grows decumbent or erect to a maximum height near 60 centimeters. The inflorescence is usually divided into two branches lined with spikelets.

Other Paspalum plants

Paspalum azuayense · Paspalum batianoffii · Pitchfork crowngrass · Blodgett's crowngrass · Paspalum canarae · Paspalum ceresia · Hilograss · Dallisgrass · Florida paspalum · Field paspalum · Bahiagrass · Brownseed paspalum

Text excerpted from the Wikipedia article Paspalum distichum 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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