Specialty Gardening: Hollyhock photos anyone?, 1 by Pagancat

Pagancat wrote:
I think what that means is they're F1 hybrids as well. I don't think it is cross-pollination, I think it's more like one parent was double, one was single - out of four seeds you probably only get one that is double... have you ever gotten *any* that were double out of the next batch of seeds? If not, it might be even more complicated of a cross. Like two singles that combine to make a double - then none of the kids would be a double.

I tried the picture below - maybe that will help a little ... ?