Bulbophyllum siamense Rchb.f.

There is quite a bit of confusion about the beautiful Bulbophyllum siamense Rchb.f..
Some sources say it´s not the correct name for this orchid,
they call it Bulbophyllum lobbii Lindl. 1847.
Others say the Bulbophyllum lobbii is a bit similar,
but at least different to the Bulbophyllum siamense Rchb.f..
We saw both and we can confirm, that the 2 species are at least different in shape.
Bulbophyllum siamense Rchb.f. is native to India (Assam), Burma, Laos, Thailand,
Cambodia, Malaysia and Indonesia. The fragrant flowers has a size of about 5 cm.
Flowering period is May – July.