Bright, peppery, and citrus-green. The first impressi on is a sharp herbaceous freshness -- more complex than cilantro, more peppery than mint. A lemongrass-like citrus quality runs through the center, with cum in-like spicy undertones. The overall effect is bracingly aromatic -- a Southeast Asian herb garden compressed into a single leaf.
Evolution over time
Immediately
Immediately
Bright peppery-citrus burst, sharp herbaceous green
After a few hours
After a few hours
Softer herbal warmth, cumin-spicy undertones
After a few days
After a few days
Faint herbal trace, quickly dissipating
Terroir & Transformation
Indicative 2025 wholesale prices.
The Full Story
Limnophila aromatica is an aquatic herb native to the wetlands of Southeast Asia, known as rau om in Vietnamese cuisine. Despite sometimes being called Vietnamese coriander or Cambodian mint, it is neither -- it is a member of the Plantaginaceae family, distinct from both coriander and mint.
The plant thrives in flooded rice paddies, marshes, and riverbanks across Vietnam, Cambodi a, Thail and, and Indi a. Its leaves release a complex aromatic profile when crushed: fresh, peppery, and citrus-green, with qualities resembling lemongrass, cum in, and fresh-cracked black pepper simultaneously.
In perfumery, Limnophila aromatica is a niche curiosity rather than a standard ingredient. Its essential oil is not widely produced, but its aromatic profile offers an interesting alternative to conventional herbal-green notes for perfumers seeking unusual botanical sources.
Rau om is essential to Vietnamese sour fish soup (canh chua ca) and is one of the fresh herbs served alongside pho. Unlike many culinary herbs, it grows best with its roots submerged in water -- a true aquatic plant that happens to be edible.
Extraction & Chemistry
Extraction method: Steam distillation of the aerial parts. Essential oil is not widely commercially available. Small-batch production in Vietnam and Thailand.
N/A — natural herb (no standard single CAS for essential oil)
Botanical Name
Limnophila aromatica
IFRA Status
No known restrictions
Synonyms
VIETNAMESE CORIANDER · CAMBODIAN MINT · HOT MINT
Physical Properties
Odor Strength
Medium
Appearance
Pale yellow to amber liquid
In Perfumery
Limnophila aromatica functions as a heart note in herbal, green, and Asian-inspired compositions. Its unusual combination of pepper, citrus, and green herbaceous notes provides complexity not easily achieved with conventional materials. Useful in compositions evoking tropical gardens, wet markets, and Southeast Asian landscapes.