Bloodwort, the Small-grained Dock, or the Rumex sanguineus, L. Is a plant seldom cultivated, as it so quickly propagate that it becomes a troublesome weed. See Withering, 353.

The fresh leaves and stalks of this vegetable afford a juice of a dusky blood-red colour ; which, after standing for a short time, changes to a dark blue or violet tint: and if prepared with alum, it might probably be used in dyeing. This juice, when laid over other colours in painting, imparts to them an additional lustre, and may be used, if properly mixed, either as a red or blue colour.