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Catharanthus roseus
Also called Old Maid, Cape Periwinkle, Churchyard Blossom, Madalena Blanco, Old Church Blossom, Old Maids Olleander, Periwinkle
In Singapore: Periwinkle, Madagascar Periwinkle, Old Maid, Cayenne Jasmine, Rose Periwinkle, West Indian Periwinkle, Tahi Ayam, 日日春, 长春花 (Naturalised in Singapore)
A pink or white flowering subshrub native to Madagascar, grown as a warm-season bedding plant and houseplant in many places. It thrives in full sun, heat and well-drained soil, and it is extremely toxic if eaten.
Catharanthus roseus, commonly known as bright eyes, Cape periwinkle, graveyard plant, Madagascar periwinkle, old maid, pink periwinkle, rose periwinkle, is a perennial species of flowering plant in the family Apocynaceae. It is native and endemic to Madagascar, but is grown elsewhere as an ornamental and medicinal plant, and now has a pantropical distribution. It is a source of the drugs vincristine and vinblastine, used to treat cancer. It was formerly included in the genus Vinca as Vinca rosea.
It has many vernacular names among which are arivotaombelona or rivotambelona, tonga, tongatse or trongatse, tsimatiririnina, and vonenina.
As an ornamental plant, it is appreciated for its hardiness in dry and nutritionally deficient conditions, popular in subtropical gardens where temperatures never fall below 5–7 °C (41–45 °F), and as a warm season bedding plant in temperate gardens. It is noted for its long flowering period, throughout the year in tropical conditions, and from spring to late autumn, in warm temperate climates. Full sun and well-drained soil are preferred. Numerous cultivars have been selected, for variation in flower color (white, mauve, peach, scarlet, and reddish orange), and also for tolerance of cooler growing conditions in temperate regions.
Notable cultivars include 'Albus' (white flowers), 'Grape Cooler' (rose-pink; cool-tolerant), the Ocellatus Group (various colors), and 'Peppermint Cooler' (white with a red center; cool-tolerant).
C. roseus can be extremely toxic if consumed orally by humans, and is cited (under its synonym Vinca rosea) in the Louisiana State Act 159. All parts of the plant are poisonous. On consumption, symptoms consist of mild stomach cramps, cardiac complications, hypotension, systematic paralysis eventually leading to death.
According to French botanist Pierre Boiteau, its poisonous properties are made known along generations of Malagasy people as a poison consumed in ordeal trials, even before the tangena fruit was used. This lent the flower one of its names vonenina, from Malagasy: vony nenina meaning "flower of remorse".
In its natural range along the dry coasts of southern Madagascar, Catharanthus roseus is considered weedy and invasive, often self-seeding prolifically in disturbed areas along roadsides and in fallow fields. It is also widely cultivated and is naturalized in subtropical and tropical areas of the world such as Australia, Bangladesh, India, Malaysia, Pakistan, and the United States. It is so well adapted to growth in Australia that it is listed as a noxious weed in Western Australia and the Australian Capital Territory, and also in parts of eastern Queensland.
Catharanthus lanceus · Catharanthus trichophyllus · Periwinkle
[Contains information from Leaf Area Index (LAI) and Heritage Trees from data.gov.sg (National Parks Board), made available under the terms of the Singapore Open Data Licence version 1.0]
Text excerpted from the Wikipedia article Catharanthus roseus by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
