Yellow buttons, "Chrysocephalum apiculatun", this is not. Barry Kemp has identified this as the long lost (we have been searching for it for ages) "Rutidosis heterogamma", and comments that "... the flower heads are larger, flatter, and single compared to 'Chrysocephalum'." Yippee. See also later in the gallery, it was found again in spring on the Digger's Roadside.
Wooli wildflowers brian