They are a kind of fruit which have their seeds adapted to their dispersion of aerial way, by what are called anemofilas, which have a pair of wings. They are usually in a pod and dries the seeds fly and are dispersed by the wind. Examples are many and different families. Among the most important families are Ulmaceae is commonly called, olmos, Oleaceae, that are called ash or Park ( genus fraxinus ) and some Bignoniaceae like Chicala ( Tecoma stans ) which is a Colombian native species.
