Papaver
Papaver is a genus of 70-100 species of frost-tolerant annuals, biennials, and perennials native to temperate and cold regions of Eurasia, Africa and North America. It is the type genus of the poppy family, Papaveraceae.
The flowers have 2 sepals that fall off as the bud opens, and 4 (or up to 6) petals in red, pink, orange, yellow, or lilac. There are many stamens in several whorls around a compound pistil, which results from the fusion of carpels. The stigmas are visible on top of the capsule, and the number of stigmas corresponds to the number of fused carpels.
The ovary later develops in a dehiscing capsule, capped by the dried stigmas. The numerous, tiny seeds escape with the slightest breeze through the pores of the capsule.
Source: en.wikipedia.org/wiki/Papaver - 13.06.2010
Papaver
Each, the Papaver Blossom and the Papaver Capsule, which can be seen in the background, habe a characteristic look, that helps to identify them easily.