Hi again Pat.
I wanted to find these pictures for you yesterday but ran out of time.
These are the best expressions of PBF (purple based foliage) that I've seen so far among my diploid and tetraploid lines.

Diploid (24 chromosome type)
http://www.hort.net/lists/iris-photos/apr08/msg00046.html

Tetraploid (48 chromosome type)
http://www.hort.net/lists/iris-photos/may10/msg00747.html

I'm hoping to ultimately have completely purple foliage, but it could be a long road to get there.
Thanks for your interest, Tom

P.S. I enjoyed your blog very much.

----------------------------------------------------------
> Hi Pat,
> Thanks and yes, I've been trying to select for better
> _expression_ of that purple foliage pigment. This one has
> pretty good _expression_ but I've had a few others that show
> it a little better.
>
> I rarely if ever fertilize or water so this one's just
> growing in the unamended local clay soil like all the rest
> of my irises.
> Take care, Tom
>
> ---------------------------------------------------------- 
>
> Hi Thomas;
>
> ----- Original Message -----
> While I am a novice at any propagation of iris, the example
> in your photo
> looks very robust and the purple pigment would likely be an
> attractive
> selling feature for some if that is what you are looking
> for? What are you
> feeding your iris plants?
>
> Pat
> http://rhodosandazaleas.blogspot.com/
>