Glaucium calycinum

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Glaucium calycinum is a flowering plant in the horned poppy family and is found only in Iran. It is a biennial plant that grows about 18–40 cm tall and lives for roughly two years. The stems are usually hairless, though the lower parts may have a few hairs. Buds are 1.5–4 cm long and may have hairy sepals. The flowers have yellow petals 2–4.5 cm long with an orange center. There are many stamens; the anthers are 2–3.5 mm long and the filaments are wider in the middle and narrow toward the ends and base. Seed pods are siliques and may be hairy when immature; once mature they can reach up to 20 cm long. When the plant fruits, the pedicels can be up to 10.5 cm long and stand upright or bend slightly. Glaucium yazdianum has similar petal color and leaf shape but differs in cellular structures, the shape of trichomes on the siliquae, and bud length. The species has two accepted subspecies. Glaucium calycinum is endemic to Iran, with records from central, northern, and northwestern parts of the country. It grows along roads and on hillsides on clay-rich or bare ground, at elevations of about 280–2,000 metres.