Fraxinus, English name ash, is a genus of flowering plants in the olive and lilac family, Oleaceae. It contains 45–65 species of usually medium to large trees, mostly deciduous though a few subtropical species are evergreen. The genus is widespread across much of Europe, Asia and North America.

Ash is a hardwood and is hard, dense, tough and very strong but elastic, extensively used for making bows, tool handles, baseball bats, hurleys and other uses demanding high strength and resilience.

Its robust structure, good looks and flexibility combine to make ash an ideal timber for use in staircases. Ash stairs are extremely hard-wearing, which is particularly important when it comes to the treads (the part of the stairway that is stepped on). Due to its elasticity, ash can also be worked on to produce curved stair parts such as volutes (curled sections of handrail) and intricately shaped balusters. However, a reduction in the supply of healthy trees, especially in Europe, is making ash an increasingly expensive option.

The Cedar, Pine and the Spruce are all softwood trees.

More Info: en.wikipedia.org