I chanced upon this Wikipedia article. It’s a classification used in perfumery: http://en.wikipedia.org/wiki/Fragrance\\_wheel It’s quite applicable to snuff. I copy below the sub-groups from the article. It wouldn’t be too hard to think of a representative snuff for each sub-group: *Floral (Floral + Fresh Notes). Main notes include fresh-cut flowers. *Soft Floral (Floral Notes). Main notes include aldehydes and powdery notes. *Floral Oriental (Floral + Oriental Notes). Main notes include orange blossom and sweet spices. *Soft Oriental (Oriental + Floral Notes). Main notes include incense and amber. *Oriental (Oriental Notes). Main notes include oriental resins[example needed] and vanilla.* *Woody Oriental (Oriental + Woody Notes). Main notes include sandalwood and patchouli. *Woods Main notes include aromatic woods and vetiver. *Mossy Woods (Woody + Oriental Notes). Main notes include oakmoss and amber. *Dry Woods (Woody Notes). Main notes include dry woods and leather. *Aromatic Fougère (Fresh Notes). Main notes include lavender and aromatic herbs. This universal fragrance family includes elements from different families: the freshness of from the Citrus family, floral notes of lavender, the spicy-sweetness of a Floral Oriental, the ambery depth of an Oriental and the Mossy Woods warmth of sandalwood and oakmoss. *Citrus (Woody + Fresh Notes). Main notes include bergamot and other citrus oils. *Water (Fresh + Floral Notes). Main notes include marine and aquatic notes, generally from the chemical calone. *Green (Fresh + Floral Notes). Main notes include galbanum and green notes. *Fruity (Fresh + Floral Notes). Main notes include berries and other non-citrus fruits.