Understanding the material
Biolandes documents a Moroccan myrtle oil distilled from foliage-related material and notes that oils from different production zones can differ. The berries in an illustrative botanical study do not mean that this particular oil is berry-derived. Myrtle and myrrh are separate plants and materials despite the similarity of their English names.
Compare myrtle with rosemary and petitgrain. Notice whether the bright edge feels citrus-like, leafy or spicy rather than assigning every herb the same smell.
Explore the relationships
Continue with Rosemary, Petitgrain bigarade, Juniper berry. These connections are comparisons for studying finished fragrances, rather than mixing instructions.
Technical references
Supplier references describe their specific materials. Images are illustrative scent studies and do not certify species, provenance, grade or ingredients in a finished perfume.