Is a small, thorn bearing tree, that is known for possessing brightly colored, yellow fruits of the citrus family, which are known simply as lemons. This fruit is cultivated all over the world, in almost every region, and the presence in perfumery is the same — large, and widespread. Originally somewhat of a hybrid between lime and citron, the lemon is now revered for the abundance of unique and pleasantly welcoming qualities it possesses. The scent is vibrant, full of life, and characteristically sharp. These qualities are so profound, that lemon is perhaps the defining ingredient in almost every fragrant composition that carries the themes of vigor and freshness.

The essential oil of lemon is the most commonly used extract of the material, and is procured via the use of cold-press expression on the peel of the fruit. As a result of using this technique over others, the aroma of the oil is almost unchanged from the aromas of the fruit and of the fresh peel. The aroma of the oil is fresh and cheerful; also bearing noticeable qualities of sour and sweet. The oil is used extensively in perfumery for various colognes and perfumes that seek to include sharp, citrusy elements in their compositions. Essential oil of lemon pairs well with many floral scents, from rose to lavender, as well as being an excellent contributor to a citrus blend that features other citrus products, from the neroli class, to the extracts of orange and sage. Since the lemon note is perhaps the lightest of all the citrus scents, it is frequently used as a top note — inviting and invigorating on first glance. Lemon is also common in summer fragrances, or fragrances catering to physical activity.