Water Dock - Rumex hydrolapathum


Stout tall much branched plant to 2 metres. Leaves large, rigid broad lanceolate tapered at both ends, lateral veins at right angles to the midrib. Inflorescence dense, flowers in much branched panicles.

Similar Species

other Docks - but it is usually much larger

Identification difficulty
ID guidance

Large plant at water's edge.  Valves triangular, 3 elongated tubercles

Recording advice

The fruits have a central part, triangular in cross-section, with three membraneous valves surrounding a small, hard 'tubercle'.  The shape and arrangement of valves and tubercles is diagnostic, and close-up photos of fruits and leaves/general habit is needed.


Canal and river banks.

When to see it

July to September.

Life History


UK Status

Fairly frequent in Britain particularly in the southern half.

VC55 Status

Fairly frequent in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 64 of the 617 tetrads.

n the current Checklist (Jeeves, 2011) it is listed as Native, occasional

Further Information


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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map