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Horseweed

GREENS, HERBS AND FOUGERES  /  green · fresh · earthy
Horseweed
Horseweed perfume ingredient
CategoryGREENS, HERBS AND FOUGERES
Subcategorygreen · fresh · earthy
Origin
VolatilityHeart Note
BotanicalErigeron canadensis
AppearancePale yellow to colorless clear liquid
Odor StrengthMedium
Producing CountriesEurope, North America
PyramidHeart

Sharp, green, faintly citrusy weed. Horseweed (Erigeron canadensis) smells like crushing a roadside plant -- pungent, herbaceous, with a turpentine-like top and a lemon-grassy edge.

  1. Scent
  2. Terroir & Origins
  3. The Full Story
  4. Fun Fact
  5. Extraction & Chemistry
  6. In Perfumery

Scent

Sharp, pungent, herbaceous-green with a turpentine-like freshness and a lemon-grassy edge. More aggressive than basil, less clean than rosemary, with a distinctly weedy, roadside quality. The limonene gives it a citrus note; the pinene gives it a piney sharpness. Wild and uncomposed.

Evolution over time

Immediately

Immediately

Sharp pungent green, turpentine-citrus, herbaceous
After a few hours

After a few hours

Green softens, herbal warmth
After a few days

After a few days

Faint herbal trace, volatile

Terroir & Transformation

Indicative 2025 wholesale prices.

The Full Story

Horseweed (Erigeron canadensis, syn. Conyza canadensis) is a common weed native to North America, now invasive worldwide. The plant produces a small quantity of essential oil with a sharp, herbaceous-green, faintly citrusy character. The volatile profile includes limonene, alpha-pinene, and trans-beta-ocimene.

In perfumery, horseweed is a rare note providing a sharp, wild-herbal green character. It is less clean than conventional aromatic herbs (lavender, rosemary), more pungent, and more 'weedy' -- the smell of abandoned fields and roadsides rather than cultivated gardens.

Functionally, horseweed works as a sharp green top-note modifier. It provides a wild, uncultivated botanical reference. Works in wild-nature, green-herbal, and hyper-naturalistic compositions.

This note in Première Peau. Simili Mirage · Gravitas Capitale. Sample all seven extraits in the Discovery Set.

Related: Alpha Pinene · Angelica · Angelica Root · Angelica Root Oil · Artemisia · Barrenwort · Beachheather · Behini Tree

Did You Know?

Did you know?
Erigeron canadensis was the first weed to evolve resistance to glyphosate (Roundup), confirmed in 2000 in Delaware. It is now glyphosate-resistant across millions of hectares of North American farmland -- making this humble weed a successful evolutionary adapters of the agrochemical era.

Extraction & Chemistry

Extraction method: Steam distillation of the aerial parts of Erigeron canadensis yields a small quantity of essential oil. The oil is not widely traded in mainstream perfumery supply chains.

↑ See Terroir & Origins for origin-specific methods.

Molecular FormulaComplex mixture — chief constituent: limonene C₁₀H₁₆
CAS Number8007-27-0
Botanical NameErigeron canadensis
IFRA StatusNo known restrictions
SynonymsMARESTAIL · CANADIAN HORSEWEED · FLEABANE · ERIGERON CANADENSIS
Physical Properties
Odor StrengthMedium
AppearancePale yellow to colorless clear liquid

In Perfumery

Horseweed (Erigeron canadensis) is a sharp, wild green top-note modifier. Limonene (citrus), alpha-pinene (piney), trans-beta-ocimene (herbal). Less clean than cultivated herbs. Works in wild-nature, green-herbal, and hyper-naturalistic compositions as an uncultivated botanical reference.

From the raw to the worn

This is what it becomes.