ring-porous

In discussing such woods it is customary to divide them into two large classes—ring-porous and diffuse-porous.

A wood with its large pores collected into one row or in a single band is said to be ring-porous.

Such woods are called “ring porous,” and the oaks are best examples.

The wood is ring-porous, that is, the inner edge of the yearly growth ring has a row of large pores.

That would represent the ring-porous woods, and the large tubes would be called vessels, or trache.