"David E. Ross" wrote in
:

It's not the mock orange that I'm used to -- Pittosporum tobira.

no, it certainly isn't i've never seen *that* mock orange, but
then, it won't grow up here...

However, there are other, unrelated plants also called mock
orange. One group is the various species of Philadelphus, which
I've never seen other than in pictures.

yes, Philadelphus sp. it looks like he has one with double flowers.
i just bought one, not realizing it was a double flowering type. the
single flowers are much more fragrant.
lee