I Think I Must Dip into the Yellow ...

It seems I'm on an iris roll, and this shape was irresistible,

 ... as was this color.

I blocked in shadows with on orange/pink mix [both staining colors].

Then I started some w/w on the petals with aureolin and orange.

I put in a thin orange wash over the background.

Then, I painted w/w, with darker, denser pigments, and allowed the paint to flow.
The background has shown the iris to be a bit washed out, so this is where I will have to go in again with yellow, and probably orange.