Alkanna tinctoria

from The Collaborative International Dictionary of English v.0.48

Alkanet \Al"ka*net\ ([a^]l"k[.a]*n[e^]t), n. [Dim. of Sp.
   alcana, alhe[~n]a, in which al is the Ar. article. See
   {Henna}, and cf. {Orchanet}.]
   1. (Chem.) A dyeing matter extracted from the roots of
      {Alkanna tinctoria}, which gives a fine deep red color.
      [1913 Webster]

   2. (Bot.)
      (a) A boraginaceous herb ({Alkanna tinctoria}) yielding
          the dye; orchanet.
      (b) The similar plant {Anchusa officinalis}; bugloss;
          also, the American puccoon.
          [1913 Webster]