Acer nigrum

（重定向自Black Maple）

Illustration from 1913's Illustrated flora of the northern states and Canada

Acer nigrum (Black maple) is a species of maple closely related to A. saccharum (sugar maple), and treated as a subspecies of it by some authors, as Acer saccharum subsp. nigrum.

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.

单词	Black Maple
释义	Black Maple 原声例句精选英语短文 Red maples, for example, turn a brilliant scarlet in the fall, while black maples become yellow. 例如，红枫的树叶在秋天变成鲜艳的猩红色，而黑枫变成黄色。英语百科 Acer nigrum （重定向自Black Maple） Acer nigrum (Black maple) is a species of maple closely related to A. saccharum (sugar maple), and treated as a subspecies of it by some authors, as Acer saccharum subsp. nigrum. 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.
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