133267 HAZEL Corylus avellana (Betulaceae) - female flowers. Height to 12m. Dense woodland shrub or small tree that is often coppiced. FLOWERS are catkins (male) and small red, tufted structures (female) (Jan-Mar). FRUITS are hard-cased nuts, green at first, ripening brown in autumn. LEAVES appear after flowers and are 6-8cm long, circular to oval, with double-toothed margins. STATUS-Common and widespread.