Genus: Corylus - Hazel print
- Cellular forms
- Domain: Eukaryota
- Kingdom: Plantae
- Subkingdom: Embryophyta
- Division: Angiospermae or Magnoliophyta
- Class: Dicotyledoneae
- Family: Corylaceae
- Genus: Corylus
- Species: Corylus avellana - Common hazel
- Species: Corylus colurna - Turkish hazel