Halesia diptera aka American Snowdrop Tree

Halesia diptera, or two-winged silverbell, is a deciduous tree or large shrub. It belongs to the storax family, Styracaceae. Its native range runs from South Carolina and Florida west to Texas. It also grows in Arkansas. Wild plants grow in wet woods, floodplains, and along streams. These damp sites help explain its need for moist garden soil.

Garden plants reach about 15–30 feet (4.6–9.1 metres) tall. Their spread ranges from 15–30 feet (4.6–9.1 metres). The crown is open and often rounded, though its outline varies. Low branches give it a broad, shrubby form. Gardeners can keep several stems or train one main trunk. Growth proceeds at a medium rate. Young bark has stripes on a light brown surface. Older bark develops patterns and sheds thin scales. Brown twigs bend in a slight zigzag and bear reddish-brown buds.

The simple leaves grow in an alternate pattern along the stems. They are oval or broader toward the tip. Toothed edges and clear pinnate veins mark each leaf. Sources give leaf lengths of about 3–8 inches. The dark green leaves turn yellow before falling in autumn. White, bell-shaped flowers hang from the branches in April and May. They grow in groups of three to six. Deep cuts divide the petals. The flowers draw bees and other garden visitors.

Dry fruits follow the flowers, each with two clear wings. These oblong drupes reach about two inches long. Their corky bodies ripen from late summer into autumn. They dry and disperse through winter. Both flowers and fruits add interest in the garden. This small tree suits lawns, woodland gardens, and shrub borders. It also works near patios or as a garden accent. Rain gardens and shaded sites match its natural habitat.

Grow it in moist, humus-rich, acidic soil with good drainage. It prefers part shade but also accepts full sun. It tolerates wet soil at times, yet suffers during drought. Mulch helps cover the root zone. Sources describe it as easy to grow with little upkeep. Missouri Botanical Garden lists USDA zones 5–8; NC State extends coverage into zone 9. Neither source reports major pest or disease trouble. Alkaline soil can cause chlorosis, leaving the foliage pale.