Staphylea pinnata aka Bladdernut

Staphylea pinnata is known as European bladdernut or Anthony nut. It belongs to the Staphyleaceae family. Its native range spans east-central and southeastern Europe to the Caucasus. Sources also list Turkey within its range. It grows in hedgerows and small woods in temperate regions. This deciduous plant forms a large shrub or small tree. It is not native to Britain or Ireland.

In gardens, it reaches about 10–16 feet (3–5 metres) tall and wide. RHS also gives an upper size range of 26 feet (8 metres). Its upright form has many stems and dense branches. It produces suckers and grows at a moderate rate. Full size may take ten to twenty years. The dark green leaves grow in opposite pairs. Each pinnate leaf has five to seven pointed, oval leaflets. These leaflets can reach about 0.33 feet (0.10 metres) long. The plant sheds its leaves for winter.

White, scented flowers hang in loose panicles during May and June. Each small bell has sepals with red tips. RHS describes a pink tint to the flowers. Flower clusters reach about 0.42 feet (0.13 metres) long. Individual flowers measure about 0.04 feet (0.013 metres). Flowering improves after a hot summer, according to NC State. Swollen, pale green capsules follow the flowers. They have thin, papery walls and two or three lobes. The fruit turns brown and adds interest in autumn. The capsules reach about 0.13 feet (0.04 metres) long.

Grow this shrub in sun or partial shade. NC State favors partial shade with rich, evenly moist soil. It accepts clay, loam, sand, and chalk with good drainage. Acid, neutral, and alkaline soils all suit it. Dry soil does not suit this plant. Its water needs are moderate, and routine care is light. RHS rates its UK hardiness as H6. Missouri Botanical Garden lists USDA zones 6–8; NC State lists 5–9. It suits woodland edges, shrub borders, and shade gardens. Its dense growth also serves as a hedge or barrier.

Serious pest and disease trouble is uncommon. Leaf spot and twig blight can still occur. Gardeners can raise it from seed or summer cuttings. The seeds are edible raw, with a reported pistachio-like taste. PFAF lists no known hazards, but this does not establish pet safety. That source lists no known medicinal uses.