Sesbania formosa (White Dragon Tree)
The Dragon Tree occurs around wetlands and along creeklines in the Kimberley and down into the desert and Pilbara. These stately trees provide shade and are attractive when in flower.
It is a bit unusual because most members of the pea family are shrubs, herbs and climbers. The flowers are also thought to be the largest of any plant in the Fabaceae.
Here is an example of an old tree from Dragon Tree Soak: