Understanding the material
Biolandes lists an absolute from the exudate of Ferula galbaniflua and also supplies other galbanum product types. The distinction between a green effect and a leafy plant extract is useful: resin can contribute to a recognisably green olfactory category. Each grade needs its own specification, rather than being predicted from the common name alone.
Compare galbanum with violet leaf. Does the green impression feel bitter and resinous, watery and leafy, or like a mixture of those textures?
Explore the relationships
Continue with Violet leaf, Narcissus, Oakmoss. These connections are comparisons for studying finished fragrances, rather than mixing instructions.
Technical references
Supplier references describe their specific materials. The botanical image is illustrative and does not certify species, provenance, grade or ingredients in a finished perfume.