1. Young shoot with male catkins (a - c), and female, almost sessile inflorescences (d, e). - 2. Branchlet with mature shoots and fruits (acorns). - 3. Ripe acorn; acorns ripening in one season. - 4. Empty cups. - 5. Winter-branchlet. Buds are elongated conical, acute at apex, angular. 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.
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