The first photo is of a typical B. montantus. The second photo is a squat high colour form, and the third photo is a little strange as the plant had long sepals and a thin very pale labellum. I spotted over 50 plants in a small area, growing with over 100 P. penduculata along with hundreds of P. nutans.
Longer sepals and a thinner labellum are more characteristic of B. umbrinus, and I thought it might be that, but the first two images are definitely montanus. There is a possible sp. aff. montanus that has been popping up lately, but we are not really sure at the moment.