Along footpath to rear of water treatment station leading to Henfield Road. Fastinating plant, it exists in two forms. This one is the terrestrial form, but there is an aquatic form as well which is a water plant - that has a shorter flower spike and larger leaves so they can float!

Terrestrial Amphibious Bistort (Persicaria amphibia) (01/09/2021) Along footpath to rear of water treatment station leading to Henfield Road. Fastinating plant, it exists in two forms. This one is the terrestrial form, but there is an aquatic form as well which is a water plant - that has a shorter flower spike and larger leaves so they can float!

Along footpath to rear of water treatment station leading to Henfield Road. The flower spike length can vary quite a bit. Common Bistort instead is more mauve in colour.

Terrestrial Amphibious Bistort (Persicaria amphibia) (01/09/2021) Along footpath to rear of water treatment station leading to Henfield Road. The flower spike length can vary quite a bit. Common Bistort instead is more mauve in colour.

Footpath alongside stream rear of water treatment works. And the flower colour can be pale as here, or slightly darker. It's not Pale Persicaria as that has yellow glands at the base of the flower spike (which this lacks).

Terrestrial Amphibious Bistort (Persicaria amphibia) (18/09/2021) Footpath alongside stream rear of water treatment works. And the flower colour can be pale as here, or slightly darker. It's not Pale Persicaria as that has yellow glands at the base of the flower spike (which this lacks).

Along footpath to rear of water treatment station leading to Henfield Road. Note the specimen at the back does have dark blotches on the leaves (some do, some don't).

Terrestrial Amphibious Bistort (Persicaria amphibia) (01/09/2021) Along footpath to rear of water treatment station leading to Henfield Road. Note the specimen at the back does have dark blotches on the leaves (some do, some don't).

Along footpath to rear of water treatment station leading to Henfield Road. Has bright pink anthers.

Terrestrial Amphibious Bistort (Persicaria amphibia) (01/09/2021) Along footpath to rear of water treatment station leading to Henfield Road. Has bright pink anthers.

Along footpath to rear of water treatment station leading to Henfield Road. A mass of it here alongside the stream.

Terrestrial Amphibious Bistort (Persicaria amphibia) (01/09/2021) Along footpath to rear of water treatment station leading to Henfield Road. A mass of it here alongside the stream.

Along footpath to rear of water treatment station leading to Henfield Road. Top down view.

Terrestrial Amphibious Bistort (Persicaria amphibia) (01/09/2021) Along footpath to rear of water treatment station leading to Henfield Road. Top down view.

Footpath alongside stream rear of water treatment works. Makro shot of a darker coloured one in the same location as the other images. Perhaps they turn darker as they age as this photo was taken a couple of weeks after the other photos.

Terrestrial Amphibious Bistort (Persicaria amphibia) (18/09/2021) Footpath alongside stream rear of water treatment works. Makro shot of a darker coloured one in the same location as the other images. Perhaps they turn darker as they age as this photo was taken a couple of weeks after the other photos.

Along footpath to rear of water treatment station leading to Henfield Road. They don't always have such red segments on the stem. The Terrestrial form has hairy leaves - the aquatic form instead is hairless.

Terrestrial Amphibious Bistort (Persicaria amphibia) (01/09/2021) Along footpath to rear of water treatment station leading to Henfield Road. They don't always have such red segments on the stem. The Terrestrial form has hairy leaves - the aquatic form instead is hairless.

Terrestrial Amphibious Bistort (Persicaria amphibia) (01/09/2021) Along footpath to rear of water treatment station leading to Henfield Road.

Along footpath to rear of water treatment station leading to Henfield Road. Sometimes there are black markings on the leaves.

Terrestrial Amphibious Bistort (Persicaria amphibia) (01/09/2021) Along footpath to rear of water treatment station leading to Henfield Road. Sometimes there are black markings on the leaves.

Along footpath to rear of water treatment station leading to Henfield Road. This has quite broad leaves for the terrestrial form (the aquatic form has broad leaves so they can float!) This one is in a very damp area, so it might be getting confused with which form it wants to take!

Terrestrial Amphibious Bistort (Persicaria amphibia) (01/09/2021) Along footpath to rear of water treatment station leading to Henfield Road. This has quite broad leaves for the terrestrial form (the aquatic form has broad leaves so they can float!) This one is in a very damp area, so it might be getting confused with which form it wants to take!