The Black Sugar Maple is considered by some authorities to be a subspecies of the Sugar Maple, Acer saccharum and the plant will be found listed as Acer saccharum Marshall subsp. Minnesota authorities treat the tree as a separate species. Black Sugar Maple is a native deciduous tree with a dense rounded crown, growing 60 to 80 feet high with a trunk diameter of 2 to 3 feet. The bark is dark gray to blackish becoming thick with age into deeply furrowed plates.
Black Maple (Acer nigrum)
Acer nigrum black maple is a species of maple closely related to A. Identification can be confusing due to the tendency of the two species to form hybrids. The simplest and most accurate method for distinguishing between the two trees is the generally three-lobed leaves of the black maple versus the generally five-lobed leaves of the sugar maple. The leaves of the black maple also tend to have a "droopy" appearance. Other differences that are not as pronounced include darker, more deeply grooved bark, slightly smaller seeds, and thicker petioles. Hybrids are intermediate in their characteristics.
Why ar maple leaves turning black and dying on mature tree.
Black Maple Acer nigrum Maple family Aceraceae. In relatively open areas, the densely branched crown is globoid to ovoid in outline. Saplings that are growing in dense shade, however, have a narrow open crown with only a few ascending branches.
Black maple, once considered a separate species Acer nigrum , is now considered a subspecies of sugar maple Acer saccharum ssp. It displays similar characteristics: dense, rounded crown; dark, furrowed bark; and brilliant fall color. It is a commonly planted tree in this region.