Quote Originally Posted by zainal abidin View Post
Hi Ron thank for showing us this exotic species, I still confuse when you say Den bursigerum, to me exactly like secundum, do you have any point to say that this is secundum and that is bursigerum?
As Ron said the flowers of secundum are all on one side of the spike and facing one way. If you look from the side the pseudobulb with the flowers look like a toothbrush with the flowers looking like the bristles of the toothbrush ; thus the name the 'toothbrush orchid'.