Siloxerus humifusus or Siloxerus filifolius

Siloxerus, either Siloxerus humifusus or Siloxerus filifolius . Christmas Tree Well, Western Australia, November 2011.

 

According to Flowering plants of Western Australia:

Siloxerus humifusus has pappus about equal to or slightly exceeding the length of the floret; capitular bracts and paleae 1.25–1.90 cm long;

Siloxerus filifolius has pappus about half the length of the floret; capitular bracts and paleae 2.5–4.5 mm long.

 

Go figure.

 

Thanks to Kai for the ID.

Done