Fragrance Notes Are Layers Of Scent That Are Layered To Form The Final Fragrance. Fragrance Notes Are Categorised Into Three Main Elements Based On How Long They Take To Evaporate, And How Long They Typically Last Following Application: Top Notes, Heart Notes And Base Notes.
Lichen
Lichen (Oakmoss) offers a deeply earthy, damp, and slightly sweet-bitter aroma, characteristic of the Chypre family. It conveys the scent of forest floor, cold stone, and aged wood, with a persistent, velvety, and complex drydown. It acts as a fixative, lending depth, structure, and lasting richness to compositions.
Origin & Extraction Of Lichen
Lichen, primarily known in perfumery as Oakmoss (Evernia prunastri), has a profound history, dating back to ancient times and becoming a staple in European perfumery by the 16th century. It is most famous as the defining base note, paired with Bergamot, for the entire Chypre fragrance family, a genre popularized by François Coty's *Chypre* in 1917. The note was deeply valued for its earthy, woody, musky, and sensual aroma, but was especially critical for its function as a powerful fixative, which anchored more volatile top notes and significantly extended a fragrance's longevity on the skin.
Despite its classic status, the use of natural Oakmoss and other lichen extracts faced severe restrictions by the International Fragrance Association (IFRA) and EU regulations in the 21st century due to the presence of potent allergens. This required the reformulation of many iconic scents, such as Guerlain's *Mitsouko*, which had relied on its characteristic aroma. Perfumers responded to this challenge by developing synthetic alternatives and advanced fractionation methods to remove the allergenic components, allowing modern fragrances to retain the complex, mossy, and woody depth Lichen provides in a compliant form.
Extraction Methods of Lichen
Lichen extraction, primarily for oakmoss (Evernia prunastri) and treemoss (Pseudevernia furfuracea), is traditionally a two-stage process. Historically, the raw lichen is first cleaned and then humidified or fermented by spraying it with water to restore permeability to the cell walls, making the subsequent extraction easier. This material is then subjected to solvent extraction—historically using benzene, which was banned decades ago due to toxicity—to produce a "concrete" or "resinoid." This crude extract is further processed with ethanol to create the "absolute," the refined form used in fine perfumery. Because many characteristic scents are actually byproducts of the extraction process rather than being present in the living organism, the choice of solvent and the intensity of the hydrolytic pre-treatment significantly define the final olfactory profile.
Modern extraction methods have evolved to focus on safety, efficiency, and sustainability. Current industrial standards utilize hexane or mixtures of hexane with more polar solvents like acetates or isopropanol to replace benzene. To comply with IFRA regulations regarding allergens like atranol and chloroatranorin, advanced fractionation and molecular distillation techniques are used to produce "low-atranol" or "IFRA-compliant" absolutes. Recent scientific developments also include "green" extraction approaches, such as Accelerated Solvent Extraction (ASE) using acetone, Ultrasound-Assisted Extraction (UAE), and the use of Volatile Natural Deep Eutectic Solvents (VNADES), which reduce solvent consumption and processing time while preserving delicate bioactive compounds.
Lichen, primarily represented in perfumery by its extracts Oakmoss and Tree Moss, is a foundational ingredient in fragrance history. Prized since the 16th century for its heavy, oriental fragrance and excellent fixative properties, Oakmoss is the essential cornerstone of the entire Chypre fragrance category. Its unique scent profile—earthy, woody, damp, and slightly bitter—provides depth and longevity to volatile top notes.
- Its use is famously associated with the classic fragrances that established the original Chypre structure, such as Coty's Chypre (1917) and the legendary Guerlain's Mitsouko (1919).
- Historically vital to other timeless scents that defined elegance, including Dior's Miss Dior and Calèche by Hermès.
The profound influence of Lichen-derived notes is evident across decades of perfumery. The characteristic earthy and woody strength it provided defined many iconic fragrances for both men and women, bridging bright openings with deep, sophisticated bases. Classic masculine scents like Ralph Lauren's Polo, Dior's Eau Sauvage, and Cerruti's pour Homme relied on the mossy depth of Oakmoss to establish their signature structure.
- In contemporary perfumery, Lichen is often used to recreate a photorealistic, atmospheric effect, as seen in niche perfumes like LICHEN (Moss/Violet Leaf/Rain) or the Japanese LICHEN BASE EAU DE PARFUM.
- The synthetic aromatic chemical that replicates the Oakmoss effect is a key feature in modern aquatic/fresh fragrances like Azzaro Chrome Intense.
Due to regulations regarding contact allergies, the use of raw Oakmoss/Lichen extracts has diminished, leading the industry to develop low-atranol absolutes or synthetic substitutes. Nevertheless, the scent remains indispensable. Modern fragrances, including sophisticated designer options like Christian Dior's Gris Dior and contemporary niche compositions like In The Belly of The Beast (Toskovat') and Salem Gothic (DS&Durga), continue to utilize this essential earthy and woody facet for depth and lasting structure.
Sustainability Of Lichen
Sustainability of Lichen
- Utilizing lichens as bioindicators to monitor air quality and environmental health, as they are highly sensitive to pollutants like sulfur dioxide
- Implementing advanced fractionation and molecular distillation techniques to remove allergenic compounds, ensuring the continued use of lichen facets while meeting strict safety regulations
- Developing synthetic and semi-synthetic aromatic substitutes to reduce the harvesting pressure on slow-growing natural lichen populations
- Promoting the conservation of healthy lichen communities, which serve as vital mini-ecosystems and nitrogen contributors to forest soils
- Encouraging sustainable collection practices by local groups who maintain an awareness of habitat protection to ensure long-term resource resilience
Trivia
Despite being a staple in the perfume industry for nearly two centuries, the two main ingredients known as oakmoss and treemoss are actually not mosses at all, but rather specific species of lichen.
What is Lichen?
Lichen, primarily known as Oakmoss (Evernia prunastri), is a composite organism made of fungi and algae that grows on trees and is a foundational base note in perfumery.What does Lichen smell like?
It offers a deeply earthy, damp, and slightly sweet-bitter aroma reminiscent of a forest floor, cold stone, and aged wood with musky facets.Why is Lichen important in perfumery?
It is the defining base note of the Chypre fragrance family and acts as a powerful fixative, anchoring volatile notes and extending a scent's longevity on the skin.How is Lichen essence extracted?
The fragrant compounds are typically obtained through solvent extraction to produce absolutes, though traditional alcohol tincturing was also historically used.Why is the use of natural Lichen restricted?
The International Fragrance Association (IFRA) and EU regulated its use due to potent allergens like atranol, leading perfumers to use synthetic alternatives or treated low-atranol extracts.What are some top perfumes featuring Lichen?
Classic examples include Coty Chypre, Guerlain Mitsouko, and Dior Eau Sauvage, while modern examples include Gris Dior and Bvlgari Man Terrae Essence.