Acer negundo

Acer negundo L.

Boxelder, Ashleaf Maple, Boxelder Maple, Manitoba Maple, California Boxelder, Western Boxelder

About plant names...

It is a rather bewildering fact that boxelder is considered by many to be the best known and most widespread of the native American maples. Considering, after all, that it isn’t called a maple, and that many other maples are also common in North America. Oh, and that its leaves don’t usually have the five-pointed iconic look of most other maples. I grew up on the Maine coast with one of these in the front yard, and never once suspected it of being a closet maple tree.

Identification: Trees are up to 69' (21 m) high and about 26' (8 m) around, unevenly branched, with thin, shallowly furrowed gray or light brown bark. Young branches are light green. It is a tough tree, tolerating both drought and up to 30 days of flooding. Leaves are opposite, in groups of 3-5 (rarely 7) leaflets, each 2-4" (5-10 cm) long. Leaf shapes are variable: pointed ovals with smooth edges, or a few spikes similar to poison ivy leaves, or a more “maple-like” shape similar to red maple. The flowers are dioecious—that is, male flowers (Photo 5) occur on separate trees than female flowers and fruits (Photo 12). The fruits are winged samaras.

Edibility: Boxelder sap, though not as sugary as that of sugarmaple, is sweet enough so that it is sometimes tapped for making syrup.

Online References:

Acer negundo on www.carolinanature.com

Acer negundo at the USDA Forest Service's Silvics of North America site

Acer negundo on Plants for a Future, a resource and information centre for edible and otherwise useful plants

Acer negundo at the University of Connecticut Plant Database

Acer negundo at the University of Wisconsin-Green Bay Cofrin Center for Biodiversity

Acer negundo on the Image Archive of Central Texas Plants

Acer negundo on CalPhotos

Acer negundo at the University of Florida Institute of Food and Agricultural Sciences

Acer negundo on SEINet—the Southwest Environmental Information Network

Acer negundo on the Integrated Taxonomic Information System

References:

Sibley, David Allen, The Sibley Guide to Trees, Alfred A. Knopf, 2009, p. 346

1 · 4/4/2012 · North Central Railroad Trail, Phoenix, MD
≈ 4 × 6" (10 × 14 cm)

2 · 9/1/2014 · NM
≈ 31 × 47" (79 × 119 cm)

3 · 5/4/2013 · Nashua River Rail Trail, Groton, MA
≈ 6 × 8" (14 × 20 cm)

4 · 4/6/2010 · Nashua River Rail Trail, Groton, MA
≈ 14 × 9" (35 × 23 cm) ID is uncertain

5 · Male flowers. · 4/13/2010 · Nashua River Rail Trail, Groton, MA
≈ 5 × 6" (13 × 14 cm) ID is uncertain

6 · 7/19/2017 · Monongahela National Forest, Monongahela, WV
≈ 21 × 14" (52 × 34 cm)

7 · 9/1/2014 · NM
≈ 19 × 12" (47 × 31 cm)

Acer negundo description by Thomas H. Kent, last updated 12 Oct 2018.

© FloraFinder.org. All rights reserved.

8 · 7/19/2017 · Monongahela National Forest, Monongahela, WV
≈ 8 × 5" (20 × 13 cm)

9 · 9/1/2014 · NM
≈ 31 × 21" (79 × 53 cm)

10 · 7/19/2017 · Monongahela National Forest, Monongahela, WV
≈ 5 × 8" (13 × 20 cm)

11 · Female flowers and early formation of samaras. · 4/13/2010 · Nashua River Rail Trail, Groton, MA
≈ 4 × 5" (10 × 13 cm) ID is uncertain

12 · Female flowers and early formation of samaras. · 4/13/2010 · Nashua River Rail Trail, Groton, MA
≈ 4½ × 6" (11 × 15 cm) ID is uncertain

13 · 7/19/2017 · Monongahela National Forest, Monongahela, WV
≈ 4½ × 7" (12 × 18 cm)

14 · 3/20/2012 · Gunpowder Falls State Park, Phoenix, MD
≈ 3½ × 5" (9.2 × 13 cm)

15 · Female flowers and early formation of samaras. · 4/13/2010 · Nashua River Rail Trail, Groton, MA
≈ 4½ × 7" (11 × 17 cm) ID is uncertain

16 · 4/13/2010 · Nashua River Rail Trail, Groton, MA
≈ 8 × 5" (19 × 13 cm) ID is uncertain

17 · Male flowers. · 4/13/2010 · Nashua River Rail Trail, Groton, MA
≈ 7 × 6" (18 × 14 cm) ID is uncertain

Range: Zones 2-9:

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