Of course, you are right. P.alpina has spots only on the central lobe.
The word 'lateral' should have been omitted. As I mentioned before,
I couldn't see those P.sp.aff.alpina in flower so I wasn't able to
judge if it was P.alpina or not. However, I will talk about it with
Mr.Stevko soon. As regards your kind offer, I won't abuse all CPers
and send a private message.
Ivo