Colchicum autumnale

This herbaceous perennial has leaves up to 25 cm (10 in) long. The flowers are solitary, 4–7 cm (2–3 in) across, with six tepals and six stamens with orange anthers and three white styles.^[9]: 324 At the time of fertilisation, the ovary is below ground.^[10]

C. autumnale is the only species of its family native to Great Britain and Ireland,^[11][10] with notable populations under the stewardship of the County Wildlife Trusts. It also occurs across mainland Europe from Portugal to Ukraine, and is reportedly naturalised in Sweden, European Russia, and New Zealand.^[2] It grows in lowland grassy meadows.^[12]

The bulb-like corms of C. autumnale contain colchicine, a useful drug with a narrow therapeutic index. Colchicine is approved in many countries for the treatment of gout and familial Mediterranean fever. Colchicine is also used in plant breeding to produce polyploid strains.^{[citation needed]}

Colchicum is lethally toxic due to its colchicine content and the leaves have been mistaken by foragers for those of Allium ursinum (ramsons or wild garlic), which they vaguely resemble.^[13][14]

This plant (and colchicine itself) poses a particular threat to felines. The corms of meadow saffron contain the highest level of toxins, but all parts of the plant are regarded as poisonous.^{[citation needed]}

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  Seed capsules
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  Seeds
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  Detail of flower at the United States Botanic Gardens
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  In a meadow Lauterbourg, (Alsace), France
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  Colchicum autumnale by Auguste Faguet
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  From The Book of Health, 1898, by Henry Munson Lyman