Madagascar periwinkle
Catharanthus, family Apocynaceae
A pink-flowered herb from Madagascar used in medicine and gardens
Catharanthus is a group of perennial herbs, mostly native to Madagascar. Its flowers are usually pink, purple or white, with a tubular shape and five twisted lobes. People grow it as an ornamental plant and use one species, C. roseus, as a source of alkaloids for treating certain cancers and other conditions.
- Most species are found only in Madagascar
- C. roseus provides alkaloids used in cancer treatment
- Flowers come in pink, purple, white and red shades
- One species also grows wild in India and Sri Lanka
- Grown worldwide as a garden ornamental
What does Madagascar periwinkle look like?
Plants in this genus are low-growing perennials with woody bases and branching stems that may trail or stand upright. Their leaves grow in opposite pairs and are simple in shape. The flowers appear singly where leaves meet the stem. Each has a narrow tube opening into five spreading lobes, often twisted, in shades of pink, purple or white. The fruit splits into two long pods filled with many seeds.
Where does Madagascar periwinkle come from?
The genus originates mainly in Madagascar, where most of its species are found only there. One species, Catharanthus pusillus, also grows wild in India and Sri Lanka. Originally classified under Vinca, it was separated into its own genus in the 19th century based on differences in fruit shape and growth form. The name reflects Greek words meaning 'pure flower'.
When and how Madagascar periwinkle blooms
These plants grow as perennials in warm climates and can reach elevations up to 2000 metres, especially in Madagascar’s central highlands. They bloom repeatedly through the growing season. Garden forms are often grown from seed or cuttings and bred for varied flower colours, including red and white with contrasting throats.
How Madagascar periwinkle is used
Catharanthus roseus is cultivated worldwide both as a garden plant and for its chemical compounds. In traditional practices across India, the Caribbean and Southeast Asia, different parts have been used for ailments like fever, stings, sore throat and high blood sugar. Modern medicine extracts alkaloids from it to treat certain cancers and hypertension.
Kinds of Madagascar periwinkle
Eight species are currently accepted. All except Catharanthus pusillus are endemic to Madagascar. The most widespread is C. roseus, known by many common names and grown globally. Others, like C. makayensis, were described more recently and remain restricted to specific regions of Madagascar.
What Madagascar periwinkle means
While not tied to major religious rituals, the plant holds significance in folk medicine across several tropical regions. Its global importance grew in the mid-20th century when compounds from C. roseus became key ingredients in chemotherapy drugs. It is now naturalized far beyond its native range and valued both ornamentally and pharmaceutically.
Questions people ask about Madagascar periwinkle
Where does Catharanthus come from?
Most species are native only to Madagascar. One species, C. pusillus, also grows wild in India and Sri Lanka.
What is it used for?
It is grown as an ornamental plant and used in traditional medicine. One species provides alkaloids for treating certain cancers and high blood pressure.
What do the flowers look like?
They are solitary, with a narrow tube and five twisted lobes, usually in shades of pink, purple or white.
Is it the same as common periwinkle?
No. Though both are called periwinkle, Catharanthus is different from Vinca, which includes the common periwinkle of temperate gardens.
Can it grow in cold climates?
It is a tropical perennial and does not survive frost. It is grown as an annual or houseplant in cooler regions.
Good reading and sources
- Encyclopaedia BritannicaArticle
- USDA Plants DatabaseUS Department of Agriculture, Article
- Plants of the World OnlineRoyal Botanic Gardens, Kew, Plant database
- Where it has been recordedGBIF, Plant database
- Sightings and photos by naturalistsiNaturalist, Plant database
The facts on this page come from the Wikipedia article "Catharanthus", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Phool rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes. It is not medical or foraging advice: many flowers are poisonous, and traditional uses are reported, not recommended. If something is wrong, tell us. Last refreshed 2026-10-03.
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