Ceylon Citronella Oil is a yellow to brownish yellow or even olive-brown liquid, occasionally hazy due to a water surplus. The odor is very peculiar, warm-woody and yet fresh, grassy and somewhat reminiscent of wet leaves. Geraniol and citronellal are the main constituents, but they are not predominant in the odor of this oil. The camphene-borneol-methyleugenol complex seems to characterize the odor of Ceylon citronella oil.
Arctander, Steffen . Perfume and Flavor Materials of Natural Origin (p. 201)