Orris in perfumery: why this note is so precious

When we think of the iris, we picture its large mauve or white flowers. Their scent, however, holds no interest for perfumers. What they are looking for lies underground: the rhizome, the thick underground stem the plant uses as a reserve.

Two species are mainly grown for perfumery. Iris pallida, the pale iris, grows in Tuscany, on the hills around Florence, where its cultivation is an old tradition. Iris germanica is grown notably in Morocco. In French the material is simply called iris; in English it has a name of its own, orris, which sets it apart from the garden flower.

Freshly dug, the orris rhizome smells of almost nothing. It has to be cleaned, peeled, then left to dry for about three years. It is during this long rest that the odorous molecules which make orris so valuable, the irones, gradually form. Few materials demand so much patience before they are even distilled.

The dried rhizomes are then ground and distilled. The result is a waxy material, solid at room temperature, known as orris butter. Purified with solvents, it yields orris absolute, which is even more concentrated. A large quantity of rhizomes is needed to obtain very little material: this is what places orris among the most precious ingredients in perfumery.

To recreate its facets at lower cost, or to extend them, perfumers also use related synthetic molecules from the ionone family, which evoke both violet and orris. On our profiles we simply write “orris” when the house names it, without presuming which form is used.

Orris is often described as powdery: it recalls face powder, rice powder, the softness of an old fabric. It also has a buttery, almost fatty side, a shade of violet, and an earthy, slightly vegetal facet reminiscent of carrot. Some find a slightly cool, almost metallic freshness in it; others great softness. It is this ambivalence that fascinates perfumers.

In a composition, orris brings elegance and a velvet texture. It calms notes that are too bright, gives structure to a floral bouquet and distinction to a leather or a wood. It is often called “couture”, so strongly does it evoke fabrics and style.

In our catalogue, orris most often sits alongside sandalwood, musk and vetiver: soft or woody materials that extend its powderiness and give it a foundation.

How do you recognise it in a fragrance? Look for a sensation rather than a precise smell: a powdery softness arriving at the heart or in the base, an impression of make-up or rice powder, a velvet that softens the neighbouring notes. In a woody scent orris brings light; in a floral it adds silk; in a leather it lends distinction.

Seven families, seven ways of handling orris: as a leather, a fougère, a wood, a white flower, an amber, a fresh floral and a gourmand. In each one, the house lists orris among its notes.

Orris appears in many other fragrances in our guide, sometimes as a discreet touch. It lends its powder to woods such as Gris Charnel, Santal Austral or Gypsy Water; it softens florals such as Night Scented Jasmine, Rose des Vents or Lyric Woman; it slips into the base of Neptune's Trident Extrait or Epic Woman, and into the heart of Soleil de Jeddah, which also repeats it in the base.

The full list, with the tier where orris appears in each fragrance, is on the orris note page. To go further, our guide Vetiver in perfumery shows how orris makes the vetiver of Orage and Gris Charnel powdery, Leather in perfumery how it softens leather, and Love Black Opium or La Vie est Belle? presents gourmand irises.