I came across these flowers on my recent trip – it is obvious where they got their name from. However I saw them described in one Visitors Centre as “Reef Flowers” – I suspect the staff had misheard. These seem to be relatively rare and often found next to new roadworks where the seeds have been spread with the gravel. In this case the flowers were next to a road built for a mining project between Wubin and Paynes Find.
The yellow flowers in the second image have nothing to do with the Wreath Flowers – they were just sharing the same piece of gravel.