Karpooravalli (Coleus amboinicus)

Karpooravalli is Coleus amboinicus, the thick-leaved mint Tamil houses crush for a camphor-oregano smell. Older packets and garden books say Plectranthus amboinicus. Kew now files the plant in Coleus. English “Indian borage” and “Mexican mint” are the same leaf, not two species.

Botanical name: Coleus amboinicus Lour.
Family: Lamiaceae
Tamil: Karpooravalli
Hindi: Patta ajwain
Sanskrit: Karpuravallī
Parts used: Leaves
Habit: Succulent aromatic perennial of the mint family
Last updated: 2026-10-30

How to recognise Karpooravalli

Loureiro published Coleus amboinicus. After the 2019 recircumscription of Plectranthus, Kew and most checklists treat this pot-herb as Coleus. The older combination Plectranthus amboinicus remains a synonym you will still see on nursery tags.

Leaves are thick, crenate, densely soft-hairy, and smell of camphor and oregano when crushed. Stems are succulent. Flowers are small and pale on a spike. That is not Ocimum, and it is not true borage (Borago officinalis).

Tamil karpooravalli (“camphor vine/leaf”) is the household name. Hindi patta ajwain nods at the thymol-like smell. If a stall says only “oregano,” you may have this plant, European Origanum, or neither.

It is almost always a cultivated pot plant in India, not a wild-collected forest herb. A neighbour’s cutting is the usual provenance.

A living pot is easy to check by its thick, furry, strongly scented leaves.

The plant roots from a cutting in a week on a wet kitchen slab. That is why it is everywhere and why a “wild-collected karpooravalli” story is usually theatre.

Leaves opposite, thick, and grey-green from the hairs; a thin, glossy tulsi leaf is a different mint. Do not let “household cold leaf” collapse Coleus and Ocimum.

Flower spikes are easy to miss if the pot is pinched for leaf. A non-flowering pot is still this species if the smell and the succulent crenate leaf match.

Traditional use of Karpooravalli

Tamil household

Leaves are crushed for a vapour or bruised into a home preparation when a child has a cold. That is household practice. It is not a paediatric dose.

Tamil vernacular

Wider tropical kitchens

The same leaf is a seasoning from the Caribbean to Southeast Asia under other English names. Food use is the honest international story.

Pantropical culinary notes

Modern notes on Karpooravalli

Its essential oil is rich in carvacrol and thymol, the compounds behind the smell of oregano and thyme.

The practical modern issue is the name change. Search both Coleus amboinicus and Plectranthus amboinicus or the literature will look thinner than it is.

Nursery tags in India still say Plectranthus. Both names on a drying sheet save the next reader an hour.

Karpooravalli safety

Leaf as a seasoning or a brief steam inhalation is the household use. Essential oil is not a kitchen leaf.

Do not put oil in a child’s nostril. Do not treat a steaming leaf as a substitute for a clinician when breathing is hard.

Pregnant people should not start concentrated extracts from a courtyard story.

Ecology and sourcing

The plant is a cutting crop. Nobody needs to strip a wild hillside for karpooravalli.

Scent is the quality test.

Related plants

Also in Lamiaceae

Questions about Karpooravalli

Is Plectranthus amboinicus a different plant?

No. It is the older name. The accepted name is Coleus amboinicus; Plectranthus amboinicus is the older combination.

What is the Tamil name of Coleus amboinicus?

Karpooravalli.

Sources

Educational page about a plant. It is not medical advice, not a diagnosis, and not an offer to sell. Traditional use is historical. If you need care, ask a licensed clinician. Questions: hello@meevamed.com.