Glebionis segetum (syn. Chrysanthemum segetum) is a species of the genus Glebionis, probably native only to the eastern Mediterranean region but now naturalized in western and northern Europe as well as China and parts of North America. Common names include corn marigold and corn daisy.
Glebionis segetum is a herbaceous perennial plant growing to 80 cm tall, with spirally arranged, deeply lobed leaves 5–20 cm long. The flowers are bright yellow, produced in capitula (flowerheads) 3.5-5.5 cm in diameter, with a ring of ray florets and a centre of disc florets.
Glebionis segetum was formerly treated in the genus Chrysanthemum, but under a 1999 decision of the International Botanical Congress, that genus has been redefined with a different circumscription to include the economically important florist's chrysanthemum (now Chrysanthemum indicum).
The corn marigold appears to have been a serious weed during the 13th century in Scotland, as suggested by a law of Alexander II which states that if a farmer allows so much as a single plant to produce seed in amongst his crops, then he will be fined a sheep.
- "The Plant List: A Working List of All Plant Species". Retrieved 30 July 2014.
- Altgervista Flora Italiana, Glebionis segetum (L.) Fourr. includes photos and European distribution map
- Biota of North America Program 2014 county distribution map
- Flora of China, Glebionis segetum (Linnaeus) Fourreau, 1869. 南茼蒿 nan tong hao
- Flora of North America, Glebionis segetum (Linnaeus) Fourreau, 1869. Corn marigold
- Dalrymple, Sir David (1776). Annals of Scotland. Pub. J. Murray. London. P. 338 -339.
- Kleonikos G. Stavridakis , Κλεόνικος Γ. Σταυριδάκης (2006). Wild edible plants of Crete - Η Άγρια βρώσιμη χλωρίδα της Κρήτης. Rethymnon Crete. ISBN 960-631-179-1.
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