Originally Posted by
primavera
The first orchid pic looks like a Bulbophyllum sp. (or is it Cirrhopetalum now?). They have wide 'internode' spacing between the pseudobulbs, as can be seen in the following post. I have no idea what the species name is, as it is the biggest genera in the orchid family, but they are very interesting: foul smelling flowers rather like rotten meat which attracts flies to pollinate it.
The third picture looks like a Coelogyne sp. Looks very similar to my C. dayanum (do hope it is C. pandurata though, have green and black flowers! scented too). It came as a surprise as it is the first time I've seen this orchid growing as a lithophyte (on rock). But then there's moss, and they always seem to grow with moss, possibly in association with mychorrhizal fungi present that help the seeds germinate. (You can see small plants on the edges of the moss, but not directly on rock.)
Orchids flower when there is an environmental trigger, ie change of seasons. I find they respond most to a drop in temperature for blooming initiation (diurnal change). I flower my moth orchids that way. Also bloom after dry season, more intense sun to harden pseudobulbs etc, but since this is in equatorial Borneo, probably unlikely (it is lowland also right?). Mr Tree is probably right too as raining season means lower temperature. One thing, the flowers of wild orchids don't last long though, have to be there at the oppurtune time. Good luck and hope it is pandurata, kekeke.
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