128433 ALDER BUCKTHORN Frangula alnus (Rhamnaceae) Height to 5m. Open, thornless bush or small tree. Found in damp hedgerows and scrub, usually on acid soils. FLOWERS are 3mm across, pale green and 5-petalled (May). FRUITS are berries, green then ripening black. LEAVES are oval and have wavy margins; dark green in summer, turning yellow in autumn. STATUS-Locally common in England and Wales only.