Glaucium flavum - Yellow Horned-poppy

Phylum: Magnoliophyta - Class: Equisetopsida - Order: Papaverales - Family: Papaveraceae

Yellow Horned-poppy

Talk of poppies and most people see red, but there are some yellow poppies too and Yellow Horned-poppy is one of the most distinctive of the bunch.


Apart from its stunning bright yellow flowers this plant is characterised by the elongated fruits, which can be up to 30cm in length - the so-called 'horns'. Yellow Horned-poppy is poisonous, and when the stems are cut or broken a yellow juice seeps out.

A close-up of Yellow Horned-poppy


Localised but fairly widespread along the coasts of Britain and Ireland, Yellow Horned-poppy is native to Britain, but it is also frequently cultivated and grown in gardens. This wildflower is found on the coasts of northern Europe and as far south as the Mediterranean region.

Occasionally plants of Glaucium flavum will pop up inland, but apart from garden escapes these plants are nearly always found in places that would have once been right beside the sea but where the land has subsequently been 'reclaimed' and then disturbed, causing the seeds to germinate and grow.

 Yellow Horned-poppy, Dorswet coast


Yellow Horned-poppy forms clumps on shingle and sandy beaches; it also grows in some sand dunes.

Blooming Times

The flowers of Glaucium flavum can be seen in the wild in Britain and Ireland from June through to September.


In the past oil produced from the seeds of Yellow Horned-poppy were used to make soap; it was also burned in lamps - no doubt in an age when these coastal wildflowers were far more plentiful than they are nowadays. Yellow Horned-poppy seed oil contains glaucine, an alkaloid that can be used in cough medicines.


Glaucium, the generic name, comes from the Greek From the Latin glaucus or the Greek glaukos and is a reference to the glaucous (waxy-blue-green or greyish) colour of the leaves. The specific epithet flava means yellow.

The common name is sometimes written as Yellow Horned Poppy.

Similar Species

Welsh Poppy Mecanopsis cambrica has yllow flowers but it does not produce thevery long seed capsules that are characteristic of Glaucium flava.

The pictures of Yellow Horned-poppy shown on this page were taken at Cemaes Bay Nature Reserve on Anglesey, North Wales, during August.

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