what you found is a part of the website of my friend Michael Lo from Kuching/Sarawak/Borneo/Malaysia. Michael really takes great pictures and his reports about his field trips are really fantastic. You can see the whole site here: http://www.geocities.com/kuchingensis/index.html .
The plants should be from Sarawak, north-west Borneo.
I notice there are a number of excellent German web sites devoted to field trips, plant collecting and etc. Can you provide some links to any? It doesn't matter if there is no English, we can all read photos!