Hi!
Amazing Bulbos that you show here!
The Bulbos ar from PNG, right?
# Looks a bit like
B. stabile, but its not the same species. Its also a bit similar to
B. crepidiferum, but this species occours in Sumatra, so it can't be the right species.
#2 I've no idea. But I'm sure, that this Bulbo is not from the Lepidorhiza Section. But maybe something from the Polymeres Section?
#3 Here I'm sure that this is a
B. sessile.
#4 This is from the Coelochilus Section (Hapalochilus). In this Section most of the Bulbos looks very similar to each other. because of this, its very difficult to find the right ID, but I would say that your Bulbo is a
B. nitidum. It looks also a bit similar to
B. speciosum, but its not the same species.
The best thing that you can do, to find the right ID, is to send a E-mail to J.J.Vermeulen.
vermeulen@nhn.leidenuniv.nl
I'm sure, that he could help you.
Best Regards,
Max