The leaf essential oils of Cistus monspeliensis plants growing wild on calc
areous and siliceous soils in Provence (South of France) were analysed by G
C and GC-MS. Qualitative and quantitative differences are noted in the esse
ntial oil composition between the Cistus populations from the two soil type
s. For chemotaxonomic purposes, a characterisation of the two types of oil
is proposed. (C) 2000 Elsevier Science Ltd. All rights reserved.