We stayed four nights in an inexpensive motel in Darwin. The parking lot had several pretty and interesting flowering plants like this one. Some fuzziness in the flower details. I was becoming aware of my camera's problem. I lost a lot of pictures of wildlife because the camera was failing. I bit the bullet and bought a replacement on our last day in Darwin before we went away from camera stores.
We saw bushes with these yellow flowers in a number of places. Eventually, we were able to check a guidebook for Northern Territory flowers and ID them as Kapok Bush (cochlospermum fraseri). The bushes as a whole didn't make good photographic subjects - a small number of flowers on widely separated bare stems. The individual flowers were mighty fine though.
The flowers were too high off the ground for me to use my small tripod or for us to get to my usual closeup photo distance. We took pictures angled upward, handholding our cameras with macro lenses (sharp but too short focal length) or with our wildllife lenses (plenty of reach but not as sharp.)