Known and Unknown Flowers, and a Gratuitous Butterfly

These are called honesty (Lunaria annua), judaspenning in Dutch (with a green-veined white (Pieris napi), klein geaderd witje in Dutch, as a visitor).

I think these flowers are called silver dollars in the colonies:

^{Olympus Stylus 1s, 300mm, ISO100, f2.8, 1/2000s}

Intermezzo: for those who are interested in what this butterfly looks like up close, look no further:

^{Olympus Stylus 1s, 200mm, ISO200, f5.6, 1/200s}

End of intermezzo.

But what are these?

^{Olympus Stylus 1s, 42mm, ISO800, f8, 1/100s}

Does anyone know?