Irritating

I really ought to know what this is... it's in flower in the Belair NP right now, and it really is quite common.  But do you think I can track it down!

So irritating.

Can't spend any more time on it, dinner's nearly ready.

And - I aimed to spend time last night commenting and thanking all you wonderful people for my 3-year anniversary.  But I couldn't get Blip to work on my iPad, so you'll have to forgive me.

EDIT: it's tetratheca pilosa - pink-eyed Susan.