generate questions: In diffuse-porous woods the pores are evenly sized so that the water conducting capability is scattered throughout the growth ring instead of being collected in a band or row. Examples of this kind of wood are alder, basswood,[citation needed] birch, buckeye, maple, willow,and the Populus species such as aspen, cottonwood and poplar. Some species, such as walnut and cherry, are on the border between the two classes, forming an intermediate group.[citation needed]
What kind of woods have pores that are uniformly sized? {sep_token} What species do aspen, cottonwood, and poplar trees belong to? {sep_token} With walnut, what's another tree in the intermediate group? {sep_token} What capability is spread through the growth ring in ring-porous species? {sep_token} Is maple wood diffuse-porous or ring-porous?