Scientific name: Rumex hydrolapathum Huds.
Common name: Water Dock
Description
Habit: A hairless perennial, to 2 m high.
Stems: Erect.
Leaves: Alternate, 40-60 cm long, undivided, untoothed, lanceolate, margin flat or slightly wavy; stipules united to form a sheath surrounding stem or leaf stalk.
Flowers: Actinomorphic, stalked, in whorls forming large, stout and dense, terminal and axillary panicles which are leafy at the base; tepals 6, triangular, 6-7 mm long, not winged, inner 3 larger and enlarging in fruit, with swellings; stamens 6; ovary superior, 1-celled; style 3.
Fruits: A small nut, 3-angled.
Habitat: Marshes, drains, riverbanks.Distribution: Frequent to very rare.
Native status: Native
Of conservation interest: No