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Lace, space, and other anomolies

LMann76543@aol.com wrote:
> I do like Sky Hooks - it is gracious enough to leave off its horns most of
> the time in my garden, and it grows and blooms well, so far.
I would have thought that horns, like color, were genetically controlled. How is it that 
sometimes they sometimes show up and sometimes not?

And the really confusing comment-

Tom Tadfor Little wrote:

> It (Batik) is a color-breaking iris; however its "normal" (unbroken) state is
> plicata. So sometimes it will have ordinary plicata blooms.

Under what conditions does it break? Is "breaking" a genetic trait? Are there other 
genetic traits that appear or not?

Just when I thought I was beginning to understand a (very) little...
Thanks                   | "There be dragons here"
John                     |  Annotation used by ancient cartographers
                         |  to indicate the edge of the known world.
Fax:                     |  (510) 795-9723
John Jones, 35572 Linda Dr., Fremont CA, 94536
jijones@ix.netcom.com, USDA zone 8 (coastal, bay)

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