1	"Flowers on leafless stems"	"Papaver nudicaule"
1	"Flowers on branching leafy stems"	2
2	"Stem leaves with broad stem-clasping base"	"Papaver somniferum"
2	"Stem leaf bases narrow, not stem-clasping"	3
3	"Flower stalk with soft, spreading hairs (whole plant bristly hairy)"	"Papaver rhoeas"
3	"Flower stalk with rough pressed-down hairs along the stalk"	4
4	"Flowers with leafy bracts below"	"Papaver bracteatum"
4	"Flowers without leafy bracts"	5
5	"Petals 2–4 cm long; capsule club-shaped"	"Papaver atlanticum"
5	"Petals 5–8 cm long; capsule more or less round"	"Papaver orientale"