Citrus: Bright peel and juice: lemon, lime, orange, grapefruit. Often driven by limonene, the same compound that makes citrus rind smell like citrus rind.
Candy Sweetness: Confection rather than fruit: sugar, tropical brightness, an almost artificial sweetness. Ester-driven, and the register modern dessert-lineage breeding has pushed hardest.
Dark Fruit: Deep and jammy: grape, blueberry, plum, berry. Comes from esters rather than terpenes, which is why two strains can share a terpene profile and taste nothing alike.
Floral: Blossom and petal: lavender, rose, violet. Linalool sits behind much of this; it is what makes lavender smell like lavender, and it turns up in cannabis more often than people expect.
Herbaceous: Green, leafy and cooling: sage, tea, mint, cracked pepper. Pinene and terpinolene drive the fresh green edge; the peppery bite is caryophyllene, the only terpene known to bind directly to a cannabinoid receptor.
Earth: Soil, forest floor, bark and pine. Myrcene and humulene do most of the work here — humulene is the same compound that makes hops smell like hops.
Funk: Sour, savory, barnyard: skunk, aged cheese, pungency. Like Gas, this is sulfur chemistry rather than terpenes, which is why it survives drying and curing so stubbornly.
Gas: Fuel and solvent: diesel, chemical sharpness, ammonia. Not a terpene smell at all — the gassiness in cannabis comes from volatile sulfur compounds, the same family that gives skunk and garlic their punch.
Dessert & Cream: Bakery and dairy: vanilla, butter, coffee, toasted nut. The Cookies and Gelato register, and the newest of the nine in cannabis terms — it barely existed before the 2010s.

From Leafly user reviews — crowd-reported impressions, not lab measurements. How this works

9 sister strains

London Poundcakehybridhalf sister48 descendants Purple Hazehybridhalf sister3280 descendants Bubba Kushhybridhalf sister342 descendants White Rhinohybridhalf sister53 descendants Sour Blueberryhybridhalf sister Frost Berryhybridhalf sister Gravity Cookieshybridhalf sister Mikadohybridhalf sister Sweet Skunkhybridhalf sister1 descendant