There is a map on their site but it doesn't label the greenhouse areas.
A clue, if you're sure of the name of the plant next to it, that might give the location. The ferns are Adiantum and I think Pteris?
No Pteris found, but Adiantum capillus-veneris is in RPH-B5, there's other Adiantum in different areas.
Nothing found in RPH-B5
Adiantum caudatum, which doesn't look like it but could be, in RPH-A5:RPH-B8
Nothing in RPH-A5, nor in RPH-B8
The next two Adiantum don't look like the one shown, and the location for A. tenerum already checked.
Adiantum trapeziforme in RPH-B1
Nothing in RPH-B1
That only leaves RPH-B7 for the other Adiantum.
Anthurium crystallinum is in that section, RPH-B7!
https://www.google.co.uk/searc...
Nothing in RPH-B7
Anthurium crystallinum could be in more than one location. I agree, the pdf list is lacking.