A blue Vanda. Blue is the rarest color in the orchid family, and even the blue Vandas only approach blue by way of violet.
A Dendrobium hybrid.
A Stanhopea, whose incredibly complex flowers have clever mechanics that trap the pollinating insect until it has done its job very thoroughly.
Probably some sort of Laeliocattleya hybrid.
A Paphiopedilum.
