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Key to Papaver
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 |