[Wikipedia] Vanilla scent: The scent of Pinus jeffreyi is variously described as reminiscent of vanilla, lemon, pineapple, violets, apple,[7] and, quite commonly, butterscotch;[8] This scent may be sampled by breaking off a shoot or some needles, or by simply smelling the resin's scent in between the plates of the bark. This scent is related to the very unusual composition of the resin, with the volatile component made up almost entirely of pure n-heptane. (contributed by Cynthia Powell)