1. Branchlet with male catkins (a - g). - 2. Branchlet with female catkins (h - o). - 3. Branchlet of a female plant with mature leafy shoots and fruit-catkins with closed (a) and (just) opening (b) many seeded capsules, one fruit-catkin in phase of seed dispersal (c), and another with empty capsules (d). Stipules are at n. Leaves are narrow lanceolate with revolute, undulate margins. - 4. Winter-branchlet. After Hempel & Wilhelm, 1889. Photos and explanations from the book: Zelimir Borzan. "Tree and Shrub Names in Latin, Croatian, English, and German, with synonyms", University of Zagreb, 2001.