Nyssa, commonly known as tupelos or black-gums, is a small genus of deciduous trees in the family Nyssaceae (order Cornales). The genus was formerly placed within the subfamily Nyssoideae of the dogwood family Cornaceae, but the APG IV classification system recognises Nyssaceae as a distinct family. Between seven and ten living species are accepted, along with several extinct fossil taxa.
Tupelos are medium to large trees with alternate, simple leaves and are renowned for their spectacular autumn foliage, which turns brilliant shades of red, orange, and scarlet. Most species are highly tolerant of waterlogged soils and seasonal flooding; several, such as the water tupelo (Nyssa aquatica) and swamp tupelo (Nyssa biflora), are obligate or strongly preferential wetland trees. The genus spans two disjunct ranges: eastern North America from southeastern Canada south through the Eastern United States to Mexico and Central America, and eastern and southeastern Asia from southern China through Indochina to Java and west to the Himalayas.
Notable members include Nyssa sylvatica (black tupelo or black-gum), one of the most widespread and ornamentally valued species of eastern North America; Nyssa aquatica (water tupelo) of the southeastern United States swamps; and Nyssa ogeche (Ogeechee tupelo) of Georgia and northern Florida, whose sour drupe-like fruits are edible and prized for tupelo honey production. Nyssa sinensis (Chinese tupelo) is the best-known Asian representative.
Tupelo wood is commercially valued for shipping containers, furniture interiors, veneer, plywood, and high-grade paper pulp. Hollow trunks were historically used as \"bee gums\" to house beehives. Tupelos are also popular ornamental trees planted for shade and fall colour, and their flowers are an important nectar source for honeybees.
Etymology
The genus name Nyssa refers to a naiad — a Greek water nymph — alluding to the genus's strong affinity for wet habitats. The common name "tupelo" is of Native American origin, derived from the Creek words ito ('tree') and opilwa ('swamp'), and was recorded in English by the mid-18th century. The city of Tupelo, Mississippi, takes its name from this tree.
Distribution
Nyssa is native to two widely separated regions. In North America the genus ranges from southeastern Canada and the eastern United States south through Mexico to Central America (Panama and Costa Rica). In Asia it occurs from southern China (including Yunnan) through Vietnam and Myanmar, south through Indochina to Borneo, Java, and Sumatra, and west to the Eastern Himalayas.
Ecology
Most tupelo species grow in moist to wet conditions and are notably flood-tolerant; Nyssa aquatica and N. biflora are characteristic trees of bottomland swamps and seasonally inundated forests in the southeastern United States. Tupelos serve as larval food plants for several Lepidoptera, including Endoclita damor. Their flowers are a significant nectar source for honeybees, and Ogeechee tupelo (N. ogeche) is the basis of the prized monofloral tupelo honey of the Florida Panhandle.
Cultivation
Tupelos, especially Nyssa sylvatica, are popular ornamental trees valued for their stately form, dense shade, and exceptional autumn leaf colour. They perform best in moist, acidic, well-drained to occasionally waterlogged soils and are hardy across a wide range of temperate climates. They are generally tap-rooted and transplant poorly when large, so nursery-grown container stock is preferred.
Cultural Uses
Tupelo wood is used extensively by artistic woodcarvers, particularly for carving decorative ducks and wildfowl figures, because it power-carves well and holds fine end-grain detail. Commercially it supplies shipping crates, furniture interiors, veneer, plywood cores, and high-grade book and magazine paper pulp. Hollow trunks were historically fashioned into "bee gums" — traditional log hive containers. The edible sour fruits of Nyssa ogeche (Ogeechee or Ocheechee Lime) are locally consumed, and the species is the primary floral source of tupelo honey, a premium monofloral honey produced in Georgia and northern Florida.
