Defi nition: Essential oil obtained by steam distillation of the fresh, fl owering aerial parts, recently gathered from Mentha canadensis L. [syn. Mentha arvensis L. var. glabrata (Benth) Fern., Mentha arvensis var. piperascens Malinv. ex Holmes], followed by partial separation of menthol by crystallization.
Defi nition: Cassia oil is obtained by steam distillation of the leaves and young branches of Cinnamomum cassia Blume (Cinnamomum aromaticum Nees).