Acer. negundo is a familiar tree to North Americans who know it as Box Elder” or “Box Elder Maple”. This is apparently due to the fact that its its whitish wood resembles boxwood and the similarity of its pinnately compound leaves with those of some species of elder (Sambucus). Other common names are based upon this maple’s similarity to ash as it is the only North American maple with compound leaves. There are many varieties or sub-species across its range and the species is a good candidate for more work on its genetics.
The species is fully dioecious and these are clearly male flowers. They are very attractive to bees. This individual is in flower this week close to Ecosur.