For approximately two decades, I have come across this tall-growing
(0.5 to 2m) species, sometimes at three different locations,
Macleaya cordata inhabiting the edge of a forest or a spot like
that, mingling with the other shorter vegetation close to the
roadside in the countryside. The three locations that were in common
had a river nearby. M. cordata lacks, as is the case of some other
herbs, petals, and petal-like white pieces of stuff are sepals,
which drop off soon after flowering. Bloom time: July-Ausust.