Colombia ranks #1 in world biodiversity in kinds of Orchids. Colombia boast about 3,500 species of orchids, which is about 15% of the entire world species.
Amazingly enough, new species are continuing to join the ranks. In fact, just a few short months ago (October 2009) the latest unique species of orchid was announced. The find was made near the city of Yotoco in the department of Valle del Cauca. The new species has been given the name Lepanthes foreroi. Unfortunately, this new species is already threatened by local farmers wanting to expand their farms.
You can read more and see a picture here: