a. All or most pith rays broad, numerous, and crowded, especially on tangential sections, medium heavy and hard, difficult to split. Sycamore.
b. Only part of the pith rays broad.
a'. Broad pith rays well defined, quite numerous; wood reddish white to reddish. Beech.
b'. Broad pith rays not sharply defined, made up of many small rays, not
COPYRIGHT(©) 2022
