Common name(s): Boxelder Maple, Box Elder, Maple Ash
Scientific name: Acer negundo
Family: Soapberry family (Sapindaceae)
Native range: North America
Type: Deciduous
Non-native range: widely planted as an urban tree in cities and parks
Average height range: 10 - 25 meters
Forest or habitat: Flood plains, riparian habitats
Wood density and quality:
Leaf shape: Odd pinnately compound (imparipinnate) with 3-7 leaflets
Leaf arrangement: Opposite
Leaf margin: Serrate
Leaf venation: Pinnate with alternating secondary veins, netted
Leaf stem: 4 - 8 cm (prior to first set of opposite leaflets)
Leaf surface: glabrous (smooth, not hairy)
Inflorescence: drooping raceme
Flower: staminate flowers on slender hairy pedicels, inconspicuous
Male/Female: dioecious (male and female are separate trees)
Fruit: double Samara pair
Edible?: no
Seed description: flattened disk-like with “wings” (samara)
Seed dispersal mechanism: wind blown samara
Bark: Gray, furrowed
Traditional uses: ornamental, shade
Commercial uses: source of wood fibre
Invasiveness: Australia (1), naturalized in parts of China (2)
(Staminate - male flowers)
(Pistillate - female flowers)
(winged "samara" seeds)
(Furrowed bark)
1. http://www.hear.org/pier/species/acer_negundo.htm
2. http://en.wikipedia.org/wiki/Acer_negundo
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