||1 - 2. Branchlet with male catkins (a - c). - 2. Branchlet with female catkins (d - f). - 3. Branchlet with short shoot and ripe (a - c) fruit-catkins (fruits are capsules opening with two valves; seeds are without endosperm, furnished with tufts of cotton-like white hair). - 4. A leader with palmately lobed leaves. - 5. Winter-branchlet. - 6. Seedling with cotyledons and first ordinary leaves. 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.