alkanet

Alkanna tinctoria, a plant whose root is used as a red dye.

The dyeing matter extracted from the roots of the plant with water or oil, used for cotton especially but also silk and wool, giving a deep red colour.

Other plants of the genus Alkanna.

Anchusa officinalis (common bugloss), a similar plant.

Anchusa ochroleuca (yellow alkanet).

Cynoglottis barrelieri (syn. Anchusa barrelieri, false alkanet).

Lithospermum arvense (bastard alkanet or field gromwell).

Pentaglottis sempervirens (green alkanet), a blue-flowered plant with evergreen leaves.

Puccoon (Sanguinaria canadensis).