Leaf Oils of the Genera Barongia, Mitrantia, Sphaerantia and Ristantia (Myrtaceae)

Abstract

Barongia lophandra gave a leaf oil with α-pinene (58%) and β-pinene (19%) as principal components. Mitrantia bilocularis leaf oil was heavily sesquiterpenoid in character with principal components being β-caryophyllene (29%) and globulol (13%). The leaf oil of Sphaerantia discolor was almost entirely sesquiterpenoid in character. The major components of the oil were bicyclogermacrene (19%), globulol (15%), viridiflorene (14%), viridiflorol (8%) and ar-curcumene (9%). Sphaerantia chartacea leaf oil was also entirely sesquiterpenoid. The principal components were β-bisabolene (t-25%), bicyclogermacrene (15-40%) and globulol (6-10%). Ristantia gouldii gave a leaf oil in which the principal components were α-pinene (39-48%) and β-pinene (19-34%). The leaf oil of Ristantia pachysperma differed from all the other oils in this group of genera in that its principal component was (E)-nerolidol (42%). α-Pinene (53-66%) was die major component of the leaf oil of R. waterhousei.