Bulbophyllum lasianthum orchids is one of the largest type of bulbophylum species in Malaysia. The leaves can reach up to 2 feets, and normally found on top of rock boulders under tree shades, beside river banks.
The flowers emit a strong stench , similar to dried fish or 'ikan masin' as called by the locals.
In one of my trips to a famous recreation area in Pahang, this bulbophyllum was found almost every where, either on the ground, on tree trunks and also on top of rock boulders, where, mostly, the area is shaded from direct sunlight. Where, the flowers is emitting a strong stench, finding it will not be so difficult.
For the flowers, refer to http://zanaf.dyndns.biz/Bulbophyllum/Bulb_lasianthum1.htm"