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Résumé :
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The leaf oils for species in the genus Bosistoa have been examined by GC and GC/MS. Bosistoa brassii produced a sesquiterpenoid leaf oil, the principal components of which were β–caryophyllene (2–12%), α-humulene (1–18%,) and bicyclogermacrene (trace—24%). Bosistoa floydii produced a leaf oil (in poor yield) dominated by α-pinene (46–67%). The leaf oil of B. medicinalis contained significant amounts of α–pinene (13–57%). The principal sesquiterpene present in the oil was β–caryophyllene (1–9%). Bosistoa pentacocca, in both varieties, produced a leaf oil devoid of monoterpenes. The principal components in the leaf oil of this species were δ–cadinene (6–11%), α–copaene (2–7%), germacrene D (4–14%) and α–cadinol (2–8%). The leaf oils from B. transversa were variable, but the majority contained significant amounts of monoterpenes, with α–pinene (24–83%) being the principal component. The oil yields in all cases were poor (0.02–0.3%). Recommendations for taxon recognition in Bosistoa are made.
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