Yellow iris (Iris pseudacorus)

Where?

Prefer sunny to light-shaded places that are wet to moist. It grows especially well directly in the water at depths of maximum 40 centimeters of water on heavy clay soils.

Appearance?

Grows as a perennial herbaceous plant, which can reach growth heights of 1 to 2 m. The gray-green sword-shaped leaves grow up to 90 cm long and 1-3 cm wide. The inflorescence consists of a yellow trifoliate single flower, from which cylindrical fruits are formed, 4 to 8 cm long, containing many seeds. The flowering period lasts from the end of May to June.

Special Features?

This plant has been used as a form of water treatment since it can take up macronutrients (such as nitrogen and phosphorus) through its roots, and is featured in many AS Level Biology practicals as its ability to grow in low pH levels makes it a useful indicator.

All plant parts of the plant are poisonous. Partly it is used as an ornamental plant for garden ponds and water banks.