Nyssa sylvatica Marsh.
Nyssa sylvatica Marsh. var. caroliniana (Poir.) Fernald
Nyssa sylvatica Marsh. var. dilatata Fernald
Nyssa sylvatica Marsh. var. typica Fernald
Black Gum, Black Tupelo, Swamp Tupelo
Black gum is native to eastern North America.
Identification: Black gum trees are 30-80' (9.1-24 m) tall and 20-30' (6.1-9.1 m) wide. The trunks are 20-39" (50-100 cm) in diameter. Dark gray bark becomes deeply cracked and scaly in appearance on older trees. Leaves are approximately oval-shaped, wider toward the end of the leaf, 1¾-4½" (5-12 cm) long. They are somewhat to very shiny, dark green, and typically smooth-edged. In the fall, leaves become dark purple or scarlet. Inconspicuous flowers are greenish-white, though they do have the rather unusual distinction of being polygamo-dioecious, in case you are keeping track. (This means that trees have mostly either male or female flowers, but a few of the opposite sex as well, yet another variation in the confusing sexuality of plants.) Fruits are black or blue in color, about ⅜" (1 cm) long.
Nyssa sylvatica on Wikipedia
Nyssa sylvatica on hort.net
Nyssa sylvatica on the USDA Forest Service's Fire Effects Information Database
Nyssa sylvatica at the USDA Forest Service's Silvics of North America site
Nyssa sylvatica at the Ohio State University PLANTFacts database
Nyssa sylvatica description by Thomas H. Kent, last updated 16 Aug 2013.