Pterostyrax corymbosus

Pterostyrax corymbosus belongs to the storax family. Its common name is little epaulette tree. It comes from southeastern China. Its range also spans western-central and southern Japan. This large shrub or small tree sheds its leaves. Several stems hold a round crown. The crown opens as the plant ages. RHS gives a garden height and spread of 13–26 feet [4–8 metres]. NC State lists both as 20–30 feet [6–9.1 metres]. Growth is fast. The plant reaches full size in 10–20 years.

The brown bark feels smooth and has pale streaks. It peels off as the stems grow. The leaves are simple, with one blade each. They grow in turn along the stems and feel like paper. Their shape ranges from oblong to oval. Each has a long, pointed tip. Small teeth line the leaf edges. Leaves are green above and silvery green below. They measure about 0.25–0.58 feet [0.08–0.18 metres] long. In autumn, they turn yellow or yellow-green, then fall.

Small white flowers have a scent. They bloom from late spring into early summer. The blooms look like bells. They form drooping panicles, or branched clusters, along one side. These reach about 0.42–0.83 feet [0.13–0.25 metres] long. Young plants may bloom before they reach full size. The hanging blooms look like shoulder trim on military uniforms. This gives the tree its common name. Winged fruits called drupes follow the blooms. Each has five ribs. Fruit clusters add interest in autumn and stay into winter.

Choose deep, rich soil that drains well but holds some moisture. Acid or neutral soil suits this tree. It can grow in clay, loam, or sand. Full sun helps it bloom, though it accepts light shade. Shade can mean fewer flowers. Light shade after noon helps where summers are hot. RHS notes that hot, sunny summers help it bloom well. Shelter the tree from cold winter winds. NC State lists USDA zones 5–9. RHS rates it H5.

Its broad shape suits woods and Asian-style gardens. It can also form a screen or barrier. RHS suggests informal gardens and flower borders. It also suggests planting the tree for its strong shape. Scented blooms, peeling bark, and autumn leaves give interest across seasons. The tree needs little care and has few reported health problems. RHS reports no usual pest or disease concerns. Prune in winter to shape the plant when needed. Sow seeds in autumn in a cold frame or seedbed. Or take semi-hardwood cuttings in summer, using partly firm shoots.