This is one that you should do hot water test on, so you can see what is happening.

That is , take a petal of the falls, put it in a dish, and pour boiling water on it. Let it sit, and then pour it off. You may have to do a couple of times to remove all the water soluble anthocyanin.

When you have done, you will see a light yellow with a dark yellow spot where you had the dark spot. What is happening is that the anthocyanin combines with the dark yellow to produce the dark purple/red, and with the light yellow to produce the blue/lavender.

Chuck Chapman

--- In iris-photos@yahoogroups.com, thomas silvers <tesilvers@...> wrote:
>
> Thanks Linda. Actually this one is pretty far down on my priorities/favorites list, but it was interesting in that in was the only surviving seedling from the cross and it preserved the IB pod parent's spot. The spot is puzzling to me too. This seedling has almost an exact combination of the spot of 'Megglethorp' overlaid on the basic coloring of 'Double Scoop' (which has the purple fading to the edges coloring on its falls). I didn't have any real goal in mind when I did the cross other than trying to get the spot into a tetraploid line. So I guess it's a step in the right direction. I still wonder if there is some different anthocyanin _expression_ going on in the reddish spot area in addition to the yellow (that you mentioned) that is surely there.
> With so many other "irons in the fire" this one probably won't get much of my attention but if it has enough gumption to survive long enough, I'm sure I'll keep putting pollen on it.
> Thanks for your interest, Tom
>
> ----------