Rumex longifolius, Rumex domesticus, SE: Gårdsskräppa,
DE: Gemüse-Ampfer, NL: Noordse zuring,
UK: Northern Dock, Dooryard dock

Scientific name:		Rumex longifolius DC.
Synonym name:		Rumex domesticus Hartm.
Swedish name:		Gårdsskräppa
German name:		Gemüse-Ampfer
Nederlandse naam:		Noordse zuring
English name:		Northern Dock, Dooryard dock
Family:		Polygonaceae, Buckwheat family, Slideväxter

Life form:		Perennial herb
Stems:		Height 60-120 cm, erect, grooved, unbranched up to inflorescence; vertical rootstock
Leaves:		Alternate,leafblades 25-50 x7-15 cm, lanceolate, tapering towards the base; wavy margins; no appendages at the base
Inflorescence:		Terminal, clusters in several racemes
Flowers:		In whorls, 10-20; segments of outer whorl small and turned backwards; Inner whorl forms the fruit valves which are roundish to kidney-shaped, with entire or crenulate margins
Flowering Period:		July, August, September
Fruits:		Achene, brown, sharply three-edged, glossy; valves with entire margins that lack tubercles
Habitat:		Pastures, roadsides, ruderal
Distribution:		Throughout the country

Derivation of the botanical name: Rumex , the ancient Latin name for the docks or sorrels. longifolius, longus, long, extended; folius, leaf; long leaved. domesticus, cultivated. The standard author abbreviation DC. is used to indicate Augustin Pyramus de Candolle (1778 – 1841), a Swiss botanist. The standard author abbreviation Hartm. is used to indicate Carl Johan Hartman (1790 – 1849), a Swedish physician and botanist. Rumex longifolius and Rumex pseudonatronatus are closely related. Rumex pseudonatronatus can be distinguished from Rumex longifolius by its narrower leaves, smaller and more distinctly triangular inner tepals, and purplish or reddish brown stems at maturity. Both have valves with entire margins that lack tubercles, leaves with undulate margins.