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Gib vs Auxin #2

Thanks for an excellent answer, Denise.
     The reason I asked is because I have willow seed that I seem well
and widely advised is quite hopeless. While it is reckless, I'm sure, to
generalize all of Salix the genus, I am reminded of the weeping willow,
and I've recently heard repitition of information in an old issue of
Organic Gardening, about how water in which willow cuttings had been
rooted would root virtually anything, due to a substance they called
"rhizocaine", which sounds much lke an auxin. I had wondered if auxin
might be leaching into the ground where the branches touch and possibly
promoting the germination or longevity of the seeds. 
     While tending another project, Salvia pisidica, (I'm told outdoor
treatment is required and I accept this) I was looking at some molecules
which I think are related to the synthetic pathways for gibberellins,
and I saw some that looked as if they might have functions of
gibberellins and auxins on a single molecule.
     Does anyone have comments on this, or know of literature referring
to this? Perhaps the significance is "biological economy", but I seem
much confused by it in general.

TIA,
Rob
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