Juniperus media does not appear a current name, certainly not to the
RHS,

Iris Cohen schreef
Where did they put things like 'Pfitzer's' and 'Blaauw'? What is the
rationale behind not accepting J. xmedia?

Iris

+ + +
Whatever happened to the easy questions?
Are you sure you want to know?
Taxon 44: 229-231. 1995
Taxon 46: 324-325. 1997

Trying to summarize:
Every botanical name may be used only once and the first publication counts
There are two Juniperus x media, and the Russian one of 1938 is the oldest.
According to Farjon (1998) this now belongs to the synonymy of Juniperus
semiglobosa.

Since the other Juniperus x media is the better-known this was proposed for
conservation, which would allow it to be used in spite of the fact that it
does not have priority. This proposal was fairly hotly debated but
eventually unanimously rejected (a fairly rare event). Something that
weighed heavily was the fact that there are / were two Juniperus xmedia's
which are / were both somewhat in use, but everything that was once in the
well-known Juniperus x media and was not a mere cultivar of Juniperus
chinensis was associated with 'Pfitzer' & al. Furthermore the name Juniperus
x pfitzeriana also did exist for these plants and this would be unambiguous.
Likely 'Pfizter' & al are now in Juniperus x pfitzeriana.

If Stewart Robert Hinsley has a new (post-1999) RHS Plantfinder he can
confirm this?

How is this for an answer?
PvR