Yellow flower growing on bridge

Yellow flower growing on bridge

Observation - Yellow flower growing on bridge - UK and Ireland. Description: It's a yellow flower with balloon shaped leaves (in 2D) though they are a bit more pointed than balloons. It seems to have five petals and prominent stamen, or whatever those pointy bits are called.

It's a yellow flower with balloon shaped leaves (in 2D) though they are a bit more pointed than balloons. It seems to have five petals and prominent stamen, or whatever those pointy bits are called.