The _Rumex acetosus_ (Sour Dock, or Sorrel), though likely to disagree with gouty persons, nevertheless supplies its leaves as the chief constituent of the _Soupe aux herbes_, which a French lady will order for herself after a long and tiring journey. Its title is derived as some think, from struma, because curative [161] thereof. This Dock further bears the names of Sour sabs, Sour grabs, Soursuds, Soursauce, Cuckoo sorrow, and Greensauce. Because of their acidity the leaves make a capital dressing with stewed lamb, veal, or sweetbread. Country people beat the herb to a mash, and take it mixed with vinegar and sugar as a green sauce with cold meat. When boiled by itself without water it serves as an excellent accompaniment to roast goose or pork instead of apple sauce. The root of Sorrel when dried has the singular property of imparting a fine red colour to boiling water, and it is therefore used by the French for making barley water look like red wine when they wish to avoid giving anything of a vinous character to the sick. In Ireland Sorrel leaves are eaten with fish, and with other alkalescent foods. Because corrective of scrofulous deposits, Sorrel is specially beneficial towards the cure of scurvy. Applied externally the bruised leaves will purify foul ulcers. Says John Evelyn in his noted _Acetaria _(1720), "Sorrel sharpens the appetite, assuages heat, cools the liver and strengthens the heart; it is an antiscorbutic, resisting putrefaction, and in the making of sallets imparts a grateful quickness to the rest as supplying the want of oranges and lemons. Together with salt it gives both the name and the relish to sallets from the sapidity which renders not plants and herbs only, but men themselves, and their conversations pleasant and agreeable. But of this enough, and perhaps too much! lest while I write of salts and sallets I appear myself insipid." The Wood Sorrel (_Oxalis acetosella_) is a distinct plant from the Dock Sorrel, and is not one of the _Polygonaceoe_, but a geranium, having a triple leaf which is often employed to symbolise the Trinity. Painters of old [162] placed it in the foreground of their pictures when representing the crucifixion. The leaves are sharply acid through oxalate of potash, commonly called "Salts of Lemon," which is quite a misleading name in its apparent innocence as applied to so strong a poison. The petals are bluish coloured, veined with purple. Formerly, on account of its grateful acidity, a conserve was ordered by the London College to be made from the leaves and petals of Wood Sorrel, with sugar and orange peel, and it was called _Conserva lujuoe_.