gregpresley schrieb:

... stayed in that darker color range. I'm even wondering if it might have
been some cultivar of magnolia campbellei.

I'm pretty sure it was a M. campbellii hybrid: Possibly one of the new Jury
or Blumhardt hybrids like 'Vulcan' or 'Black Tulip'. Have a look at
http://www.magnoliastore.com/
Gotthelf
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G. Wolmershaeuser