Belongs to: flowering plants

Yellow iris Iris pseudacorus

Also known as: flag iris, yellow flag

Best time to see: Jun to mid Aug

Key facts

The familiar wild yellow iris common beside fresh water and in marshy areas, forming large clumps

Sword-like leaves are often bluish, and eaten by moth caterpillars


Plant grows in clumps, 40–150cm tall; each stem has large, bright yellow flowers on top

Leaves are like tall green swords

© Claire Cadman