Mounted and intermediate to warm growing. Flowers are a bit hidden between the roots, but the very intense scent makes it easy to detect them. I am not sure about the species identification and have seen similar flowers labelled as ensiformis, but I trust Jean-Louis Barbry Les Orchidées du genre Rodriguezia
Lovely flowers.....your plant have impressive roots.
I have seen the IOSPE photos and they say it is not an accurate representation of the orchid.
The French link you have, hortus orchis and wiki have similar photograph as your flower. There is also a flickr photo of Rafael Schneider originally from Altenkunstadt and currently living in Kreuzlingen, Schweizthat that showed similar form as your flower.