Nigel Cattlin / Redshank (Persicaria maculosa) growing as arable weed. England, UK. September.

Nigel Cattlin / Redshank (Persicaria maculosa) growing as arable weed. England, UK. September.

Nigel Cattlin / Redshank (Persicaria maculosa), an annual arable weed. Berkshire, England, UK. August.

Nick Upton / Redshank / Spotted ladysthumb (Persicaria maculosa) flowering on riverbank, Wiltshire, UK, July.

Nick Upton / Redshank / Spotted ladysthumb (Persicaria maculosa) flowering on riverbank, Wiltshire, UK, July.

Nick Upton / Spotted ladysthumb (Persicaria maculata) flowering in damp grassland, Cornwall, UK, September.

Simon Colmer / Redshank / Red-leg (Persicaria maculosa) Stedham Common Nature Reserve, Sussex, UK

Linda Pitkin / Redshank (Persicaria maculosa). Hampton Court, Richmond Upon Thames, England, UK. August.

Linda Pitkin / Redshank (Persicaria maculosa), Hampton Court, Richmond Upon Thames, England, UK. August.

Linda Pitkin / Redshank (Persicaria maculosa) and Water-pepper (Persicaria hydropiper) The Moors SWT, Nutfield Marsh, Merstham, Surrey, England, August.

Nigel Cattlin / Redshank (Persicaria maculosa) seedlings with other weeds in seedling sugar beet on Cambridgeshire Fen soil

Nigel Cattlin / Redshank (Persicaria maculosa) pink flowers from an important annual weed against a black background