Acer palmatum ‘Seiryu’ is a distinctive Japanese maple recognised as one of the few upright-growing, finely dissected cultivars. Unlike cascading laceleaf forms, it develops a vertical, open structure with delicately cut green foliage that gives a light, airy appearance through spring and summer. In autumn, the leaves turn vivid shades of gold, orange, and crimson, creating a striking seasonal transformation. Its combination of finely divided foliage and upright habit makes ‘Seiryu’ particularly valuable where texture and autumn colour are wanted without a weeping form. Hardy and reliable in sheltered positions with well-drained soil, it offers refined structure and strong seasonal interest in a compact garden setting.