Colchicum
Bulb-like plants with crocus-shaped flowers that bloom in late summer or autumn
Colchicum is a group of perennial plants with about 160 species, known for their crocus-like flowers that emerge in late summer or autumn before the leaves. Native to regions from West Asia and Europe to South Africa, colchicums are grown in gardens but are poisonous in all parts.
- Colchicum flowers appear before their leaves, earning the name 'naked lady.'
- All parts of the plant are toxic if ingested.
- Native from West Asia and Europe to South Africa.
- Easily mistaken for crocus, but they are unrelated.
- Felbrigg Hall in the UK holds a national collection.
What does Colchicum look like?
Colchicum plants grow from corms that look like bulbs. Their flowers resemble crocuses, with six petals and colors ranging from white to pink and purple. The blooms appear directly from the ground, often before any leaves show, giving them the nickname 'naked lady.' The styles inside the flower are unusually long, sometimes over 10 centimeters. Leaves are strap-shaped and come up in spring after the flowers have faded.
Where does Colchicum come from?
Colchicum is native to a wide area stretching from West Asia and the Mediterranean through Europe and down the eastern coast of Africa to South Africa. The name comes from Colchis, a region in present-day Georgia, which is also known from Greek mythology. Over time, species from related genera like Androcymbium and Merendera were reclassified into Colchicum as botanists learned more about their genetics.
When and how Colchicum blooms
In temperate climates, colchicums are grown as ornamental plants. They are usually planted as corms in well-drained soil. The flowers appear in late summer or autumn, often with no leaves present. The foliage grows later, in spring. Some species from tropical regions produce flowers and leaves at the same time. Gardeners value them for their unusual flowering season.
How Colchicum is used
Colchicums are popular in gardens for their late-season flowers. All parts of the plant are poisonous, and they have a long history of use in traditional remedies because of the chemical colchicine they contain. However, their toxicity means they must be handled with care. In the United Kingdom, a collection of colchicums is kept at Felbrigg Hall in Norfolk.
Kinds of Colchicum
The genus includes around 160 species, with some, like Colchicum melanthioides, native to tropical areas and producing both flowers and leaves together. Others, such as Colchicum autumnale, are known for especially high levels of toxicity. Many species once placed in other genera have been moved into Colchicum as plant classification has changed.
What Colchicum means
Colchicum is sometimes confused with crocus, but they belong to different plant families. The name links the plant to the ancient region of Colchis and its myths. Some species are grown for their ornamental value and have received awards from horticultural societies. Because of their poisonous nature, colchicums have a place in stories about historical poisonings.
Questions people ask about Colchicum
Where does Colchicum come from?
Colchicum species are native to a broad region from West Asia and the Mediterranean through Europe and down the eastern coast of Africa to South Africa.
What does Colchicum look like?
Colchicum plants have crocus-like flowers in shades of white, pink, or purple that bloom in late summer or autumn, often before any leaves appear. The leaves are strap-shaped and come up in spring.
Is Colchicum poisonous?
Yes, all parts of Colchicum plants are poisonous. The leaves, corms, and seeds contain toxic compounds and should not be eaten.
How is Colchicum used?
Colchicum is mainly grown as a garden flower for its late-season blooms. It has also been used in traditional medicine, but its toxicity requires caution.
How can you tell Colchicum apart from crocus?
Colchicum has six stamens and three long styles, while crocus has three stamens and a single style with three stigmas. Their corms also differ in shape.
Good reading and sources
- Encyclopaedia BritannicaArticle
- Colchicum 'Pink Goblet'Royal Horticultural Society, Article
- 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 "Colchicum", 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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