Sturdy tree with a heavy straight trunk. In young trees, the trunk grows dead straight to the top with a stiff upright branching. Later, several straight upright trunk branches develop, widening the tree. Young twigs are greenish-grey and felty-haired but soon become bare and green. The leaves are more or less round, matt dark green with a distinctive dense white-felty underside. The leaf tip is short pointed, the base heart-shaped. The leaf edge is sharply serrated. In autumn, the leaf turns yellow. It stays on the tree for a long time. Hanging corymbs of strongly scented flowers appear in July. The short-stalked bract is about 5 cm long. T. tomentosa was widely used as an urban tree, but nowadays there are several cultivars with a more regular growth habit. Is fairly insensitive to aphids because of its felty leaves.