Curled Dock - Rumex crispus

Medium to tall plant. Leaves narrow-lanceolate with very wavy margins, short stalked. Flowerheads dense, in branched spikes, branches rather upright. Fruit valves heart shaped, 1 -3 swollen tubercles.

Other docks

Tubercles oblong, one (or rarely all 3) well-developed, valves triangular, rounded, no lateral teeth.  Leaves with wavy margins.

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 are needed.

Disturbed and cultivated land, waste places, hedge banks.

June to October.

Perennial.

Quite common in much of Britain, but less so in the north.

Very common in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 596 of the 617 tetrads.

In the current Checklist (Jeeves, 20111) it is listed as subsp crispus, and is Native, frequent

http://www.kenadams.org.uk/esb/Docks.htm