Composition of the Essential Oils from the Roots ofThapsia maximaMiller andT. villosaL.

Abstract
The chemical composition of the essential oils from the roots of plants identified as Thapsia maxima morphological types I and II and T. villosa diploid types 1 and 2, tetraploid types 3 and 4 and hexaploid type 5 has been investigated by GC and GC/MS. The oils from the different specimens of Thapsia were characterized by a high proportion of sesquiterpenoid components. The results are compared with those previously obtained from the fruits of the same plants.