Classifying wood as either a hardwood or softwood comes down to its physical structure and makeup and so it is overly simple to think of hardwoods as being hard and durable compared to soft and workable softwoods.
The softest hardwood.
And while this example lists just some of the most popular hardwood species there are hundreds of varieties representing the north american hardwood population.
Although classified as a hardwood alder is one of the softest of all hardwoods and is more commonly referred to as a semi hardwood.
However the wood is omitted from this list for two main reasons.
Because hardness is an important factor and hardness.
A hardwood named quipo cavanillesia platanifolia is commonly reported as the softest known wood with an alleged janka hardness of 22 lb f 98 n.
Other soft hardwoods.
Similarly wood from the yew tree which is one of the toughest woods and is harder than most types of oak is classified as softwood.
For example balsa wood is known as one of the softest and least dense types of wood yet it is categorized as hardwood.
The hardest commercially available hardwood is hickory and it is five times harder than aspen one of the soft hardwoods.
This happens to be generally true but there are exceptions such as in the cases of wood from yew trees a softwood that is relatively hard and wood from balsa trees a.