The was foliage evidence of thousands of these to come, I only saw a few with flowers open though. This one was about 15cm, but there were some which had flowered at about 5cm, obvoiously with less flowers.
They were in sand dunes.
I cant recall seeing them in the more wooded or lush green areas of the NP.
Sorry I haven't got a piccie of just the flowers to go with this.