In such a habitat is also found the great water dock, food plant of the reserve's most notable butterfly, the large copper.

Marsh plants include Great Spearwort, Lesser Water-plantain, Lesser Reedmace, Greater Tussock Sedge, Purple Small-reed, Great Water Dock, Yellow-wort and Traveller's-joy.

(Great Water Dock; Water Dock; Giant Water Dock) is a species of perennial herbaceous plants in the genus Rumex native to fens and freshwater banks of Europe and Western Asia.

(Great Water Dock; Water Dock; Giant Water Dock) is a species of perennial herbaceous plants in the genus Rumex native to fens and freshwater banks of Europe and Western Asia.

The larvae feed on Rumex hydrolapathum.

Rumex hydrolapathum Huds.

The larvae feed on various plants, including Rumex hydrolapathum, Centaurea, Iris, Cyperaceae and Polygonum.