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Black mangrove
Avicennia germinans
Avicenniaceae


General Landscape Uses:

In coastal areas where protected from wind and boat wake.

Ecological Restoration Notes:

A keystone species of tidal swamps, especially in areas of higher salinity.
Availability:
Native plant nurseries.
Description:
Medium to large tree or a shrub with a dense rounded crown. Trunks stout, variable, often branching low to the ground but sometimes erect; to 1 foot in diameter or rarely larger. Bark dark, smooth when young, becoming rough with age exposing orange inner bark. Leaves leathery, dark and shiny above and lighter below, 1-3 inches long. Numerous, erect root projections (pneumatophores) emerge from the soil surrounding the tree.
Dimensions:
Typically 20-40 feet in height; to 61 feet in South Florida. Usually taller than broad, but smaller, more shrub-like plants can be broader than tall.
Growth Rate:
Moderate.
Range:
Monroe County Keys north along both coasts to St. Johns County and Franklin County and west to Mississippi, Louisiana and Texas; West Indies, Mexico, Central America, South America and western Africa. Common within most of its range. For a digitized image of Elbert Little's Florida range map, visit the Exploring Florida website.
Habitats:
Tidal swamps and marshes; also wet swales on beaches.
Soils:
Wet, inundated saline soils.
Nutritional Requirements:
Moderate; can grow in nutrient poor soils, but needs some organic content to thrive.
Salt Water Tolerance:
High; tolerates flooding by salt water.
Salt Wind Tolerance:
High; can tolerate moderate amounts of salt wind without injury.
Drought Tolerance:
Low; requires moist to wet soils and is intolerant of long periods of drought.
Light Requirements:
Full sun.
Flower Color:
White.
Flower Characteristics:
Semi-showy, in cone-shaped heads, 1-2 inches broad. Fragrant.
Flowering Season:
All year; peak in spring and early summer.
Fruit:
Flatish, asymetrical, velvety green pod, 1-2" long; often beginning to germinate while still on the tree.
Wildlife and Ecology:
One of three native mangrove trees, it is the most salt tolerant. It exudes salt from the underside of the leaves. The pneumatophores provide air and trap tidal debris. Larval host plant for mangrove buckeye (Junonia evarete) butterflies. Nectar plant for great southern white (Ascia monuste) butterflies. Flowers also attract bees, which make honey from the nectar.
Horticultural Notes:
Easily grown from seed (propagules).
Comments:
The dense wood has been used to make charcoal. The honey is commercially harvested and is considered of excellent quality.


 


Roger L. Hammer
James Johnson, 2014
In habitat, Everglades National Park, Florida
Keith A. Bradley
Shirley Denton
Shirley Denton
Steven W. Woodmansee
Chuck McCartney
Steven W. Woodmansee

Susan Trammell