Any species in the genus Argemone which is prickly

A leaf-cutting bee (Hoplitis papaveris) which uses pieces cut from poppy petals for the lining of its cells.

(US, historical) Synonym of Gunpowder Treason Day (now Guy Fawkes Day).

(US, historical) Synonym of Guy Fawkes Night.

Either of the two species of poppy in the genus Romneya.

Liriodendron tulipifera

A plant of the species Stylophorum diphyllum

A diagnostic test used before surgery to predict the location of a fistula. The patient is fed poppy seeds and his/her urine is examined to see whether the seeds are present.

Papaver nudicaule, a boreal flowering plant.

coralloids