Many books have been published containing pictures and measurements and nomenclatures for orchids. Looking at those pictures is something that confuse a lot getting you crazy. You can not distinguish anything. Just looking in the same page for the same species you recognize that they are not similar at all and are totally different, and the same for different books. The same species looks different in different boos also. In addition, the names are so many that you become more confused. I t is time to solve this problem , don't you think so?