Native to:
Alabama, Arizona, Guatemala, Illinois, Kentucky, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Missouri, New York, Tennessee, Vermont; Introduced into: Albania, Algeria, Altay, Argentina Northeast, Austria, Belarus, Belgium, Bolivia, Bulgaria, Buryatiya, Central European Rus, China North-Central, China South-Central, China Southeast, Czechoslovakia, East European Russia, France, Germany, Greece, Hungary, Iraq, Italy, Kazakhstan, Khabarovsk, Korea, Morocco, New Zealand South, Primorye, Sakhalin, Spain, Sweden, Tadzhikistan, Turkey, Turkey-in-Europe, Turkmenistan, Ukraine, Uzbekistan, Vietnam, West Himalaya, West Siberia, Yukon as per POWO;
Common name: Three-Leaved Maple, Ash Maple, Ash-leaf Maple, Black Ash, California Boxelder, Cutleaf Maple, Cut-leaved Maple, Negundo Maple, Red River Maple, Stinking Ash, Sugar Ash, Boxelder Maple

Acer negundo is a species of maple native to North America. Box elder, boxelder maple, and maple ash are its most common names in the United States.

Acer negundo is a small, usually fast-growing and fairly short-lived tree that grows up to 10–25 metres (33–82 ft) tall, with a trunk diameter of 30–50 centimetres (12–20 in), rarely up to 1 metre (3.3 ft) diameter. It often has several trunks and can form impenetrable thickets.[4]
The shoots are green, often with a whitish to pink or violet waxy coating when young. Branches are smooth, somewhat brittle, and tend to retain a fresh green colour rather than forming a bark of dead, protective tissue. The bark on its trunks is pale gray or light brown, deeply cleft into broad ridges, and scaly.[5]
Unlike most other maples (which usually have simple, palmately lobed leaves), Acer negundo has pinnately compound leaves that usually have three to seven leaflets. Simple leaves are also occasionally present; technically, these are single-leaflet compound leaves. Although some other maples (such as Acer griseum, Acer mandshuricum and the closely related A. cissifolium) have trifoliate leaves, only A. negundo regularly displays more than three leaflets.
The leaflets are about 5–10 centimetres (2.0–3.9 in) long and 3–7 centimetres (1.2–2.8 in) wide with slightly serrate margins. Leafs have a translucent light green colour and turn yellow in the fall.
The flowers are small and appear in early spring on drooping racemes 10–20 centimetres (3.9–7.9 in) long. The seeds are paired samaras, each seed slender, 1–2 centimetres (0.39–0.79 in) long, with a 2–3 centimetres (0.79–1.2 in) incurved wing; they drop in autumn or they may persist through winter. Seeds are usually both prolific and fertile.
Unlike most other maples, A. negundo is fully dioecious and both a “male” and “female” tree are needed for either to reproduce.
  • Winter buds: Terminal buds acute, an eighth of an inch long. Lateral buds obtuse. The inner scales enlarge when spring growth begins and often become an inch long before they fall.
  • Flowers: April, before the leaves, yellow green; staminate flowers in clusters on slender hairy pedicels one and a half to two inches long. Pistillate flowers in narrow drooping racemes.
  • Calyx: Yellow green; staminate flowers campanulate, five-lobed, hairy. Pistillate flowers smaller, five-parted; disk rudimentary.
  • Corolla: Wanting.
  • Stamens: Four to six, exserted; filaments slender, hairy; anthers linear, connective pointed.
  • Pistil: Ovary hairy, borne on disk, partly enclosed by calyx, two-celled, wing-margined. Styles separate at base into two stigmatic lobes.
  • Fruit: Maple keys, full size in early summer. Borne in drooping racemes, pedicels one to two inches long. Key an inch and a half to two inches long, nutlets diverging, wings straight or incurved. September. Seed half an inch long. Cotyledons, thin, narrow.[5] 
Although native to North America, it is considered an invasive species in some areas of that continent. It can quickly colonize both cultivated and uncultivated areas and the range is therefore expanding both in North America and elsewhere.   
This species prefers bright sunlight. It often grows on flood plains and other disturbed areas with ample water supply, such as riparian habitats. Human influence has greatly favoured this species; it grows around houses and in hedges, as well as on disturbed ground and vacant lots.
This species prefers bright sunlight. It often grows on flood plains and other disturbed areas with ample water supply, such as riparian habitats. Human influence has greatly favoured this species; it grows around houses and in hedges, as well as on disturbed ground and vacant lots.
(From Wikipedia on 16.1.13)


Acer negundo from Kashmir : Attachments (2). 2 posts by 2 authors.
Acer negundo from Kashmir, commonly planted in Gardens.
One of the few species of Acer with compound leaves, leaflets are usually three in this species.
Photographed on June 16, 2010

Acer negundo : Srinagar,Kashmir : 20DEC16 : AK-38 : 2 posts by 2 authors. Attachments (3)
Pictures taken in one of the Mughal Gardens during last week of April. Identified by …



Tree For ID : California : 17OCT14 : AK-5 : 5 posts by 4 authors. Attachments (5)
Tree seen in Fremont on 28th Sept,14.
Medium sized tree, in a school.
Acer Species?

…, the closest match I could get was to Acer negundo (California Boxelder).

agree. i seem to have missed this post earlier. thanks … for the possibility.
quite not so uncommon in northern California

Thanks for the id and validation.

Suggested id is Acer negundo (California Boxelder) by Vijayasankar Ji.
There is another post from California also suggested to be the same, although the leaves are different.
…, could you kindly have a look?

Tree For ID : California : 22OCT14 : AK-21 :  3 posts by 2 authors. Attachments (4).
A tall tree, seen on way to Los Angeles in the premises of one of the rest houses where we stopped for lunch.
Pictures taken on 2nd Oct,14.

It seems Acer negundo

Thanks for the id.

For validation please.


Acer for ID from Mississauga, Canada-GS23112021-5: 2 high res. images.
Please help with the ID of Acer species clicked from Rattray Marsh, Mississauga, Canada, 23-8-2019

Acer griseum (Franch.) Pax ??

I think looks different as per images at Acer griseum (Introduced- USA)
Appears close as per images at Acer negundo (Introduced in India)
Pl. check.

Yes …, Acer negundo agrees in both leaves and fruits.


Acer negundo from Srinagar Kashmir-GS20062022-2: 7 very high res. images.
Acer negundo photographed from Ahuzibagh Garden, Srinagar Kashmir, 16-6-2010.

I have seen this tree in Princeton University campus & around in USA. For me the ID is correct.

Box Elder Acer negundo (Male plant) from Srinagar: 4 images.

Am posting some photos of Box Elder (Acer negundo) an introduced monoecious plant species from Srinagar. The male plant has long attractive flowers which hang in panicles and appear just before the leaves in March. It seems that photos of male flowering plants from this locality have not been posted before here. Previous posts by … are of leaves which appear just after flowers. It is also called Ash Maple because the leaves are pinnately compound as in Ash.
Habitat:  Corner of a field in Srinagar
Habit: Tree 15-20 feet high
Inflorescence: Flowers hanging in panicles at the end of long hairy pedicels 3-4cm or more in length.
Petals: Absent
Perianth: minute

All photos taken in last week of March 2024.
All photos under CC licence (Attribution only needed)

Two more photos
Pollen Grains at X 750 and X 225 magnification

Yes …, I had clicked it in July, 2011 when it was fruiting in Hazuribagh garden, where we spent our childhood.

Photo of pinnately compound leaf. Most maples have palmate leaves. This is the only Acer species which can have more than three leaflets.

One more photo’
A photo of a leaf with 6 leaflets. (Photo CC license Attribution only)
A.negundo  is the only Acer species to regularly display more than 3 leaflets (Wikipedia article).
Another interesting fact is that its seeds contain Hypoglycin A which causes Seasonal Equine Myopathy in Horses in some areas of N.America and Europe.
A closely related toxin in lychee fruit causes encephalopathy in undernourished children who consume the fruit in large amounts  in  lychee growing areas of India in the lychee harvesting season.



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