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
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© Tony Gunton
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© 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