This question is about the simple type of bow often (but not exclusively :) ) made by children that consists of a branch of wood with a cord tied to both its ends. Obviously such a branch should be straight and uniformly thick. Furthermore there is the question of how much force it can take. I experienced that wood from certain brushes/trees can take more force (at the same diameter) than others.
Which trees/bushes make good bows, i.e. can take a lot of force?
Please also give a reference in what region those types can be found. I am asking from a middle european standpoint, but answers for other regions are welcome as well.