Alkanet

n. plant from the borage family (native to southern Europe); red dye obtained from this plant

The name alkanet generally refers to Alkanna tinctoria or Dyer's Bugloss (though it may be used for Anchusa officinalis or Common Bugloss).It is a member of the Borage family Boraginaceae. Alkanna tinctoria is also known as orchanet, dyer's bugloss, Spanish bugloss or bugloss of Languedoc. Its name comes from the Spanish word alcana, from Arabic al-hena, after henna, (Lawsonia inermis).
See more at Wikipedia.org...

Noun
1. perennial or biennial herb cultivated for its delicate usually blue flowers
(synonym) bugloss, Anchusa officinalis
(hypernym) anchusa

n. alkanet, plant from the borage family (native to southern Europe); orchanet

(n.)
The similar plant Anchusa officinalis; bugloss; also, the American puccoon.
  

(n.)
A dyeing matter extracted from the roots of Alkanna tinctoria, which gives a fine deep red color.
  

(n.)
A boraginaceous herb (Alkanna tinctoria) yielding the dye; orchanet.