lavendula spica

from The Collaborative International Dictionary of English v.0.48
Spike \Spike\, n. [Cf. G. spieke, L. spica an ear of grain. See
   {Spikenard}.] (Bot.)
   Spike lavender. See {Lavender}.
   [1913 Webster]

   {Oil of spike} (Chem.), a colorless or yellowish aromatic oil
      extracted from the European broad-leaved lavender, or
      aspic ({Lavendula Spica}), used in artist's varnish and in
      veterinary medicine. It is often adulterated with oil of
      turpentine, which it much resembles.
      [1913 Webster]
    

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