Water Horsetail
Equisetum fluviatile
Equisetum fluviatile is a perennial vascular plant that reaches heights of up to 150 centimeters and is typically found in shallow water or marshes. It is characterized by its mostly unbranched, smooth stems with a central cavity that occupies about four-fifths of the total diameter. The plant thrives in stagnant or slow-moving waters, ditches, and fens, often forming extensive monocultures. Reproduction occurs primarily through underground rhizomes and via spores produced in terminal cones.
Details
Oxygen production
Minor oxygen release into the water and sediment via the aerenchyma.
Habitat function
Serves as a spawning substrate for amphibians and as a hiding place for juvenile fish and invertebrates.
Nutrient uptake
High capacity for the uptake of silicates and nitrogen compounds.
Food source for
Food source for muskrats and waterfowl; host plant for various specialized insect species.
Human use
Historically used for polishing metals due to silica content; used in herbal medicine as a diuretic and for strengthening connective tissue.
Ecology
Ecological role
Pioneer plant in silting zones; provides structure and protection for aquatic microorganisms and insect larvae.
Competitor species
Common reed (Phragmites australis), bulrushes (Typha spp.), and other reed-forming species.
Ecosystem service
Shoreline stabilization through rhizome networks; nutrient filtration from the water; habitat provision.
Threats
Improvement of wetlands, drainage of ditches, and excessive eutrophication.
Scientific profile
Profile
Reproduction
Generative via spores; intensive vegetative spread via extensive underground rhizome runners.