if the MATERIAL works for bonsai creation, and we are PLEASED with the
artistic creation, such concerns, at least in my mind, become incidental to the
final product.

Yes, BUT:
If a particular cultivar is extremely good or extremely bad for bonsai, we need
to communicate this. I recently acquired a J. chinensis 'Old Gold' which I am
saving for my club to use as a demo tree. I checked on the Web and found that
the last recipient of the Ben Oki award was the same cultivar. This is
important information.
Also, when we put on a bonsai show, the trees should be labeled correctly.
Suppose a viewer sees one labeled Juniperus procumbens 'Nana' when it is really
J. squamata 'Prostrata.' He wants to try that very species, but when he goes to
buy one he might get something different. We owe it to the public to have our
exhibit trees labeled accurately.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)