![]() Sugar maples are native to most of the northeastern United States and southeastern Canada extending southward to portions of Tennessee and westward to Kansas. schneckii, a southern variety that is also present in parts of Indiana, is characterized by having lighter colored bark and pubescent petioles. Deam referred to this variety by the now obsolete synonym of Acer saccharum f. In Trees of Indiana, Indiana State Forester Charles C. saccharum, the type variety, is common and widespread. Subspecies, Varieties, and Forms: Botanists have described numerous variations, but currently, ITIS recognizes only two varieties: Where their ranges overlap, the two species form naturally occurring hybrids. Recent genetic studies suggest that only geographical range and not morphology are useful for separating the two species (Skepner and Krane 1998). Hybrids: Sugar maple is so closely related to black maple, that many taxonomists have considered A. The classifications represented on this page reflect the contemporary taxonomic placement by the Integrated Taxonomic Information System (ITIS). nigrum) and their variations have been a contested taxonomic debate for many decades. The taxonomic placement of sugar maple ( Acer saccharum), black maple ( A. Compared to sugar maple, Norway maple lacks the plated bark on mature trees, has flowers that are lighter green and physiologically dissimilar, and has leaves with rounded tips that excrete a milk-like sap when broken. The exotic Norway maple ( Acer platanoides) also resembles sugar maple. Look for the following features in sugar maple: 5-lobed leaves that are relatively flat and glabrous, petioles that are glabrous and lack stipules, somewhat lighter-colored twigs. Separating the two species can be challenging. The closest genetic relative is black maple ( Acer nigrum), which some taxonomists consider a subspecies of saccharum. Similar Species: In Indiana, sugar maple ( Acer saccharum) is one of five widespread maple trees with palmately-lobed, simple leaves.
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