Strange in a way, we have three Orange poppies like that, one single with green leaves, one double with green leaves and the third is single with grey green almost leathery leaves. The book says they are all P rupifragum, but they are very very different, leaf-wise.
Our P rupifragum came from Bob Brown who is usually accurate with names. Strangely too, while the others are real seed weeds, the true species(?) has only ever produced one seedling in 12 years.