Acer shirasawanum ‘Aureum’ – (wild variety: mountainous regions of Japan)
(= A. japonicum #Aureum#)
Habit: Broad large shrub or small tree, 3-4 m tall and wide, seldom larger; compact and bushy, upright, very slow-growing; 10-15 cm a year.
Flowers: Pale yellow or whitish; May to June.
Fruits: Initially conspicuous red, later brownish.
Leaves: Round, seven to eleven-lobed, some 10 cm in size; shoots initially bright yellow, later bright yellowish green; dense foliage, yellow or orange yellow in autumn.
Roots: Shallow roots; fine root system, very sensitive to compaction and pavements.
Demands: Shady to semi-shady, avoids hot, dry areas; likes cool areas, usually frost hardy; likes high to very high humidity; sensitive to wind; very sensitive to soil and air pollution.
Soil: Fresh to moist, moderately acidic to neutral, always well drained; sandy-humic to sandy-loamy, no heavy substrates.
Hardiness: Zone 6