Question

Alkanet is the common name of several related plants in the borage family (Boraginaceae):

• Alkanet, Alkanna tinctoria, the source of a red dye; this is the plant most commonly called simply "alkanet"
• Various other plants of the Alkanna genus may be informally called alkanet.
• Alkanet or common bugloss, Anchusa officinalis
• Bastard alkanet or field gromwell, Lithospermum arvense
• False alkanet, Anchusa barrelieri
• Green alkanet, Pentaglottis sempervirens, a blue-flowered plant with evergreen leaves
• Yellow alkanet, Anchusa ochroleuca

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Wikipedia