No clear line is distinguishable between spring and summerwood.
The summerwood is thin, not conspicuous, and slightly resinous.
The annual rings are wide, and are about evenly divided between spring and summerwood, though the latter often exceeds the former.
The wood is heavy, of slow growth, the summerwood thin and dense.
The wood is very porous, but the large pores are confined to the springwood, while the broad bands of summerwood are dense.
The annual rings are narrow and consist largely of summerwood.
The summerwood is broad and distinct, usually constituting three-fourths of the annual ring.
The summerwood is so narrow that it resembles a fine, black line.
The summerwood occupies about half of the annual ring, and is dense and dark colored.
The summerwood is narrow, but dark in color in the heartwood.