Thanks for the explanation, Bob.
I have Zua, but it isn't blooming yet this year,
although it's setting buds. I need a much better picture of it to send
----- Original Message -----
Sent: Wednesday, June 09, 2010 1:39
Subject: Re: [iris-photos] Another
El; A sport is generally considered to be the mutation of a single gene
during vegetative growth. That one gene can effect a number of characters but
the most common example is a blue Iris producing a white sport or vice versa.
The Sport may be fairly stable and continue in the new form for many
generations. Example Iris albicans will occasionally have a blue plant appear
in a large population of white. The blue form has been registered as Madonna
which if my e-mail would allow should be within single quotes. The Botanical
rank of Forma is generrally considered to be a single gene difference and can
also be named a cultivar. Zua is believed to be a single gene difference and
has a crepe like texture to the flower parts. I used to grow it but it has
many years since I have seen a plant and eventually would like to find it
again. The is also a sport of Zua that is known as Blue Zua, that is blue
rather than the lightly blue greyed white of Zua. I can remember I had a slide
but it was terribly out of focus.