Golden Guinea Flower

Hibbertia scandens

“A vigorous scrambler with dense foliage” - NPOS p.332

There are beds of this outside the office building where I work, I’ve not seen it in the wild.

from Friends of Lane Cove National Park:

Hibbertia scandens is a vigorous climber commonly found on sandy coastal areas through to inland forests. It prefers sunny positions on good soil. It has thick fleshy stems trailing 3m up tree trunks or along the ground, often twining around each other. The name “scandens” refers to its climbing habit.