Litsea cubeba essential oil from China, also known as May Chang.
Species: Litsea cubeba. Famly: Lauraceae.

Aeracuras' popular Litsea cubeba essential oil is used in place of lemongrass, since the oil is mostly citral. Lemony, sweet aroma.
Here is an article that contains a short discussion of litsea cubeba: Aromatherapy and Asthma.