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Key to Papaver

Papaveraceae

Papaver

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1 Upper cauline leaves clasping the stem; [section Papaver]
1 Upper cauline leaves not clasping the stem.
  2 Flowers > 10 cm across; perennial; [section Macrantha]
  2 Flowers < 10 cm across; annual; [section Rhoeadium].
    3 Capsule 2-3× as long as broad; stigmatic lobes 5-9
    3 Capsule 1-1.5× as long as broad; stigmatic lobes 8-15