Is it possible to add a pic of the whole plant.? Is it a tree or shrub? How tall is it? It reminds me of Eupatorium sp but..... http://www.google.co.uk/search?hl=e...biw=1280&bih=622&q=eupatorium&orq=eupatorium+
It had one trunk but was less than 2 meters tall, probably a young tree. These are the only pictures I have of the leaves. In the future I will take more photos for identification purposes. I will take a look at your suggestion.
Certainly a Eupatorium in the old sense, now split into many genera. This one reminds me a little of Bartlettina, but I don't know if that has species in Colombia.