Essential oils obtained from the inflorescences of Achyrocline satureioides
(Lam.) DC, Achyrocline alata (HBK) DC and Achyrocline tomentosa Rusby, col
lected from central Argentina, were analyzed by GC and GC/MS. Fifty-two com
pounds representing 93-98% of the oils were identified. Caryophyllene was t
he most abundant component in all oils studied (39-48%).