Tom, I was wondering whether you know of any sources which help determine Diplocaulobium. I have D falangiferum and validicolle. The two plants look exactly the same in growth as well as flower and also look like the D aratriferum in your picture. See https://picasaweb.google.com/lh/phot...ni-NzSWgUne28Q (in that picture the colouration of the lip can't be easily seen)