Best time to see: mid Jul to mid Sep
Key facts
Aquatic cousin of the kitchen herb, common in wet places
Leaves are pointed oval, purplish-green, hairy and aromatic
Lilac flowers in summer, in rounded heads
© Tony Gunton
© Owen Keen
Aquatic cousin of the kitchen herb, common in wet places
Leaves are pointed oval, purplish-green, hairy and aromatic
Lilac flowers in summer, in rounded heads