: having vessels more or less evenly distributed throughout an annual ring and not varying greatly in size — compare ring-porous.

What is the difference between ring-porous and diffuse porous?

Hardwoods may be divided into ring-porous and diffuse-porous trees. In ring-porous trees the vessels laid down at the beginning of the growing season are much larger than subsequent vessels laid down at the end of the season (or ring). Diffuse-porous trees form vessels of roughly the same radial diameter throughout…

Which trees are diffuse porous?

In diffuse-porous woods the pores are scattered throughout the growth ring instead of being collected in a band or row. Examples of this kind of wood are basswood, birch, buckeye, maple, poplar, and willow.