I assume that's the
underside of the leaf? They look too oblong to me, to be eucalyptus... (aren't eucalyptus leaves sortof round?) My Lisianthus grows with the leaves right across from each other like that
(but I don't have a pic of the underside.) Then again, if it "smells like eucalyptus", it probably IS... I don't know of anything else that smells that way!
(Kenny,
this might be the link that RugbyHukr was aiming at. The UBB code was messed up.)