Acer caudatifolium aka Caudate Maple

Acer caudatifolium is a deciduous tree in the soapberry family, Sapindaceae. Common names include Kawakami maple and snakebark maple. It grows wild only in Taiwan, including eastern and southern areas. Its native home lies in mountain forests. These forests stand at 2,000–8,000 feet [610–2,438 metres] above sea level.

In gardens, it reaches about 25–40 feet [7.6–12.2 metres] tall. Its densely branched crown spans 12–26 feet [3.7–8 metres]. Wild trees can reach 60 feet [18.3 metres]. The tree has an upright form and smooth bark. The bark ranges from green to reddish green, with fine pale stripes. These markings give the bare tree interest in winter. Leaves are dull green, with paler undersides and toothed edges. They have a thin, papery feel and taper to a point. Most lack lobes, though some have three shallow lobes. In autumn, the leaves turn yellow, orange or red.

Small flowers hang in racemes during spring, from March to April. Missouri Botanical Garden describes cream to pale green flowers. The RHS gives their colour as purple to white. The flowers are not a main garden feature. Paired winged fruits, called samaras, follow the blooms. The RHS describes reddish fruits that turn yellow as they mature in autumn.

Grow this maple in sun or part shade. Some afternoon shade helps limit leaf scorch. It needs evenly moist soil that drains well. The RHS lists clay, loam and sand as suitable soils. It also accepts acid, neutral and alkaline soil. Choose a sheltered site away from strong winds. Mild coastal climates suit it best, with cool winters and summers without strong heat. Missouri Botanical Garden lists USDA zones 8–9. The RHS gives it a UK hardiness rating of H4. Trees take 20–50 years to reach their full size.

Use it as a specimen on a lawn or near woodland edges. It also suits courtyards and can serve as a shade tree. Its striped bark and autumn leaves provide the main visual interest. Routine upkeep is low, though pests and diseases can occur. Watch for aphids, scale insects, caterpillars and Acer gall mite. Possible diseases include Verticillium wilt, honey fungus and Acer leaf scorch. Growers can raise new trees from seed or use grafting.