Yellow horned poppy (Glaucium flavum Crantz.): flowering and fruiting stem with separate root and seeds. Coloured etching by M. Bouchard, 177-. | Wellcome Collection
Glaucium flavum - Wikipedia
GLAUCIUM flavum - yellow horned poppy SOW AUTUMN or EARLY SPRING 50+ seeds | eBay
Wildflower Horned-poppy, Yellow Irish Wild Flora Wildflowers of Ireland