NEWS > Plants for wetland techniques in wastewater treatment: Iris pseudacorus

Iris pseudacorus belongs to the family of Iridaceae. It is native to Europe, western Asia and northwest Africa. In many areas it is considered an invasive plant.

It is an herbaceous flowering perennial plant, growing to 100–150 cm tall, with erect leaves up to 90 cm long and 3 cm broad. The flowers are yellow and bloom from April to June, 7–10 cm across, with the typical iris form. The fruit is a dry capsule 4–7 cm long. These capsules are 6-angled and cylindrical-prismatic to ellipsoid in shape. The average capsule contains around 120 seeds.

Iris pseudacorus grows better in wet conditions and it is often common in wetlands. It prefers flooded soils with exposure to full shade conditions. It tolerates aquatic conditions, low pH, and anoxic soils (not too compact). The plant spreads quickly, by both rhizome and water-dispersed seed.

While it is primarily an aquatic plant, the rhizomes can survive under continuous dry conditions.

This plant has been used as a form of water treatment due to the ability to take up heavy metals through its roots.


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