Carpinus L. (Betulaceae)
A genus of about twenty-six species of trees; of temperate regions of the Northern Hemisphere, extending southward to se. Asia and Central America. The smooth gray bark gives Carpinus the names "water-beech" and "blue-beech", the fluted, sinewy appearance of the trunk the name "muscle-tree", and the very hard, heavy wood the name "ironwood."
One species occurs in North Carolina, Carpinus caroliniana (Hornbeam, ironwood). It is considered native.