Yellow Iris
Iris pseudacorus
Iris pseudacorus is a perennial herbaceous plant reaching heights of up to 150 centimeters. It features a robust, creeping rhizome and sword-shaped, grey-green leaves. The plant is characteristic of shorelines, ditches, and wet meadows, producing vibrant yellow flowers between May and July.
Details
Oxygen production
Low (oxygen transport to the rhizosphere via the aerenchyma).
Habitat function
Spawning ground for fish in shallow water zones, nesting site and hiding place for waterfowl.
Nutrient uptake
Very high, particularly effective in the uptake of nitrogen and phosphorus.
Food source for
Pollinators such as bumblebees and hoverflies; rhizomes are eaten by muskrats.
Human use
Ornamental plant for garden ponds, used in constructed wetlands, tannin extraction from rhizomes.
Ecology
Ecological role
Provides habitat for waterfowl and insects; contributes to shoreline stabilization.
Natural predators
Preyed upon by muskrats or specialized insect larvae such as the iris sawfly.
Competitor species
Competes with other reed bed plants such as cattails (Typha) or common reed (Phragmites).
Ecosystem service
Water purification through nutrient uptake, erosion protection on banks.
Threats
Destruction of wetlands, shoreline development, intensive mowing, and drainage.
Scientific profile
Profile
Reproduction
Generative via buoyant seeds (hydrochory) dispersed by air chambers, and vegetative through the growth and branching of rhizomes.
Protection & threats
Main threats
Loss of wetlands due to drainage, intensive shoreline engineering, and excessive mowing of riparian buffer strips.