GREENS, HERBS AND FOUGERES / fresh · green · floral
Polygonum
Category
GREENS, HERBS AND FOUGERES
Subcategory
fresh · green · floral
Origin
Volatility
Heart Note
Botanical
Polygonum spp. (syn. Persicaria spp.)
Appearance
Pale green to dark green liquid (tincture or absolute)
Odor Strength
Medium
Producing Countries
China, Japan, Southeast Asia
Pyramid
Heart
Green, peppery, and mildly astringent. Polygonum (knotweed family) carries a fresh, slightly bitter-green character with a hint of tannin — like crushed stems of a weed growing between paving stones.
Fresh, green, and mildly bitter-astringent with a peppery undertone. Less herbal-aromatic than mint or basil. More weedy and wild than cultivated green notes. The tannin content gives a slight mouth-drying quality (in olfactory terms, a sense of astringency).
Closer to sorrel or dock (related plants in Polygonaceae) than to traditional perfumery greens. An understated, unglamorous greenness.
Evolution over time
Immediately
Immediately
Fresh, green, mildly peppery — crushed weed stems
After a few hours
After a few hours
Softer, astringent green with fading peppery bite
After a few days
After a few days
Faint, dry, green-herbal trace
The Full Story
Polygonum is a large genus of flowering plants in the Polygonaceae family (knotweeds and buckwheats), comprising hundreds of species distributed worldwide. The aromatic profile varies by species, but common threads include green, mildly astringent, and faintly peppery notes.
Several Polygonum species have traditional aromatic or medicinal uses: P. odoratum (Vietnamese coriander / rau ram) has a citrusy-coriander scent; P. hydropiper (water pepper) has a sharp, peppery bite. The genus is not a major source of perfumery materials, but its green, herbal character appears as a note concept in niche compositions.
In fragrance, polygonum is used to suggest wild, weedy greenness — not the cultivated green of herbs or the dense green of tropical leaves, but the austere, slightly bitter green of wayside plants. It is a territory note more than a character note.
Polygonum hydropiper (water pepper) contains polygodial, a sesquiterpene dialdehyde so pungent that it was historically used as a pepper substitute in regions where black pepper was unavailable. The same molecule is also found in certain marine organisms.
Extraction & Chemistry
Extraction method: Extraction data not independently verified for perfumery-grade use. Steam distillation of certain Polygonum species (particularly P. hydropiper) is documented in phytochemistry research. The essential oil contains sesquiterpenes, polygodial (a pungent dialdehyde), and various green-leaf volatiles. Not a commercially traded perfumery ingredient at scale.
Molecular Formula
N/A — complex natural mixture
CAS Number
N/A — natural extract, complex mixture
Botanical Name
Polygonum spp. (syn. Persicaria spp.)
IFRA Status
No known restrictions
Synonyms
KNOTWEED · SMARTWEED
Physical Properties
Odor Strength
Medium
Appearance
Pale green to dark green liquid (tincture or absolute)
In Perfumery
Polygonum is a niche green modifier used in top-to-heart positions. It provides wild, weedy greenness — an alternative to cleaner green notes like galbanum or violet leaf. Useful in naturalistic, territory, and forest-flo or compositions. The note is typically constructed from green-leaf molecules (cis-3-hexenol, cis-3-hexenyl acetate) with peppery modifiers and mild tann in-like accents. Appears in artisanal and botanical-themed fragrance work.
