Citrus is the freshest register in perfumery and the shortest lived, which is the whole challenge of the family. Lemon, bergamot, orange and grapefruit are made of very light molecules, which is exactly why they smell so bright and exactly why they vanish so fast. These are built to solve that, with the citrus sitting over woods rather than over nothing. Eau de parfum, unisex, 6 to 10 hours on skin.
A lemon is technically a fruit, and perfumers still separate the two families, because they behave in opposite ways. Citrus notes are sharp, sour at the edges and volatile. Fruity notes, berry, peach, apple, lychee, are rounder, sweeter and last considerably longer. If you like the brightness but find citrus disappears too quickly, what you actually want is a fruity opening rather than a citrus one.
Bergamot is the most used top note in perfumery and most people have never knowingly smelled it alone. If you have had Earl Grey tea, you have tasted it: bright and lemony, but with a genuine floral quality underneath and a bitter green edge that no other citrus has.
That floral undertone is why perfumers rely on it. Most citrus notes evaporate and leave a gap before the heart arrives. Bergamot hands over smoothly, which is why it opens gourmands and orientals as often as it opens fresh fragrances.
Be realistic first: a pure citrus cologne will not last eight hours anywhere, and in a Delhi May it can be gone in five minutes. That is physics, not a fault in the fragrance.
What works is a citrus opening over a woody or green base, so the brightness reads at the start and the structure carries the day. Three sprays rather than two, on exposed skin, and one on a collar. Citrus is also the safest category for a packed metro or a shared cabin, because it smells like being clean rather than like wearing perfume.
A fragrance built on citrus notes: lemon, bergamot, orange, grapefruit, mandarin or neroli. Citrus is treated as its own family, separate from fruity, because the notes are lighter, sharper and far shorter lived.
Citrus molecules are very light and evaporate fast, and heat accelerates it. A pure citrus fragrance may last two to four hours. One built over a woody or musky base will keep its character far longer.
Citrus is a specific family of notes. Fresh is a broader umbrella that includes citrus plus aquatic, marine and green notes. All citrus fragrances are fresh, but plenty of fresh fragrances contain no citrus at all.
Bright and lemony but softer than lemon, with a genuine floral quality underneath and a bitter green edge. It is the distinctive flavour in Earl Grey tea.
It is the safest category for it. Citrus projects modestly and reads as clean rather than as perfume, which suits shared cabins, meetings and crowded commutes.
Yes, more than almost any other family. Citrus notes are not gendered and citrus fragrances are routinely sold as unisex.