Acer barbinerve Maxim.

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Credits

Article from Bean's Trees and Shrubs Hardy in the British Isles

Recommended citation
'Acer barbinerve' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/acer/acer-barbinerve/). Accessed 2024-12-02.

Genus

Acer

Other taxa in genus

Glossary

androdioecious: With only male or only hermaphrodite flowers on individual plants.
nutlet: Small nut. Term may also be applied to an achene or part of a schizocarp.
ovate: Egg-shaped; broadest towards the stem.
raceme: Unbranched inflorescence with flowers produced laterally usually with a pedicel. racemose In form of raceme.
unisexual: Having only male or female organs in a flower.

References

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Credits

Article from Bean's Trees and Shrubs Hardy in the British Isles

Recommended citation
'Acer barbinerve' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/acer/acer-barbinerve/). Accessed 2024-12-02.

Fruiting specimen of Acer barbinerve with roundish ovate leaves and grooved nuts, from Arboretum Wespelaar, Belgium (10 July 2007). Image © Jan De Langhe - Arboretum Wespelaar.

A small, deciduous, dioecious tree, sometimes a shrub; young shoots downy. Leaves five-lobed, roundish to ovate in main outline, slightly heart-shaped at the base, slender-pointed, sharply, coarsely and unevenly toothed, the niche between the lobes very narrow; 2 to 31⁄2 in. long, almost or quite as wide; dark green and slightly downy when young above, softly downy beneath with conspicuous tufts in the vein-axils; stalk slender, often as long as the blade. Flowers yellowish, produced in April; those of the male tree in short clusters of four to six; those of the female tree on a raceme 2 in. long terminating a twin-leafed twig. Wings of the fruit 3⁄8 to 1⁄2 in. diameter spreading at an angle of about 120°, and, with the nutlet, making the whole fruit 11⁄4 to 11⁄2 in. wide.

Native of S.E. Manchuria; introduced about 1890. It is akin to A. argutum, another unisexual maple, from which its more coarsely toothed leaves, its petals being narrowed to a stalk at the base, and its larger fruits distinguish it.

Vigorous shoot on Acer barbinerve shows 3-lobed leaves, at Westonbirt Arboretum, UK (24 July 2007). Image © Jan De Langhe - Arboretum Wespelaar.

Foliage of Acer barbinerve with 5-lobed leaves, coarsely dentate at margin, from a plant at Arboretum Hof ter Saksen, Belgium (28 June 2005). Image © Jan De Langhe - Arboretum Wespelaar.

2 pairs of bud scale scars and downy current year shoot on Acer barbinerve. The lamina lower surface is pubescent on veins and in vein axils but lacks any membraneous pockets typical of the section Macrantha (Arboretum Wespelaar, Belgium – 10 July 2007). Image © Jan De Langhe - Arboretum Wespelaar.

Valvate bud, typical of section Arguta, on Acer barbinerve (Arboretum Hof ter Saksen, Belgium – 28 June 2005). Image © Jan De Langhe - Arboretum Wespelaar.

Leaves with 5– and partly 3-lobed lamina, the terminal lobe with usually ≤15 coarse teeth/side on Acer barbinerve (Arboretum Wespelaar, Belgium – 10 July 2007). Image © Jan De Langhe - Arboretum Wespelaar.

Coarsely dentate margin and typical narrow sinuses between terminal lobe and lateral lobes on Acer barbinerve (Arboretum Hof ter Saksen, Belgium – 28 June 2005). Image © Jan De Langhe - Arboretum Wespelaar.

Acer barbinerve 8 m tall at Blagdon Hall, Northumberland; August 2013. Image Owen Johnson.

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