Mentha citrata oil is a pale yellow or pale olive colored to almost water-white liquid of a sweet/herbaceous, somewhat fruity-fresh odor type; it resembles bergamot, but is distinctly more harsh in its terpenic topnotes, less rich in body, and without the oily-sweet, candy-like undertone of good bergamot oils. On the other hand, mentha citrata oil presents a certain bergamot note without the citrus notes.
Arctander, Steffen . Perfume and Flavor Materials of Natural Origin (pp. 483-484).