Black gum
Nyssa sylvatica
BlackGum


Type:   Deciduous Hardwood
Family:   Nyssaceae
Native Range:   Eastern North America
Zone:   3 to 9
Height:   30 to 50 feet
Spread:   20 to 30 feet
Bloom Time:   May to June
Bloom Description:   Greenish white
Sun:   Full sun to part shade
Water:   Medium to wet
Maintenance:   Low
Leaf:   Slightly toothed leaves 5", dark green above and paler below
Attracts:   Birds and bees
Fruit:   Oval, 1/2" long
Other:   Shade Tree, Street Tree, Rain Garden
Tolerate:   Clay Soil, Wet Soil



Cultivated as an ornamental tree in parks and large gardens, where it is often used as a specimen or shade tree. The tree is best when grown in sheltered but not crowded positions, developing a pyramidal shape in youth, and spreading with age.

Nyssa sylvatica is a major source of wild honey in many areas within its range. Hollow sections of black gum trunks were formerly used as bee hives by beekeepers.

The wood of Nyssa sylvatica is heavy, hard, cross-grained, and difficult to split, especially after drying. This resistance to splitting led to its use for making mauls, pulleys, wheel hubs, agricultural rollers, bowls, and paving blocks. The wood is also used for pallets, rough floors, pulpwood, and firewood.

Nyssa sylvatica is an important food source for many migrating birds in the fall. Its early color change (foliar fruit flagging) is thought to attract birds to the available fruit, which ripen before many other fall fruits and berries. The fruit is quite marked, dark blue, in clusters of two or three. The sour fruits are eagerly sought by many kinds of birds, including: American robin, Swainson's thrush, gray-cheeked thrush, hermit thrush, wood thrush, northern cardinal, northern mockingbird, blue jay, red-bellied woodpecker, yellow-bellied sapsucker, northern flicker, pileated woodpecker, eastern phoebe, brown thrasher, eastern bluebird, European starling, scarlet tanager, gray catbird and cedar waxwing.

The limbs of these trees often deteriorate early, and the decayed holes make excellent dens for squirrels, raccoons, Virginia opossums, as well as nesting sites for honeybees.


Further information:
Virginia Tech Dendrology
Missouri Botanical Garden
Go Botany New England

Map of Nyssa sylvatica in the Borough