more random flowers ....

OK ... flowers, weeds, whatever! This plant is growing near the tool shed, and I was intrigued by the enormous leaves, so we left it alone to see what it would do ... well, what it did was grow ... and Grow, ... and GROW .... and now it's getting little yellow flowers on the top ...
Does anyone know what this IS??

Petunia ...

Red Clover ... (Trifolium pratense)

Gerbera ...