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Alnus Mill. Alder

• Alnus glutinosa (L.) Gaertner Common Alder
  • Alnus glutinosa subsp. antitaurica Yalt. Toros Alder (E)
  • Alnus glutinosa subsp. barbata (C.A.Meyer) Yaltırık Bearded Alder
  • Alnus glutinosa subsp. betuloides Ansin Birch-leaved Alder (E)
  • Alnus glutinosa subsp. glutinosa Sticky Alder
• Alnus orientalis Decne. Oriental Alder
  • Alnus orientalis var. orientalis Ansin
  • Alnus orientalis var. pubescens Dippel

Betula L. Birch

• Betula browiczana A. Güner Rize Birch (E)
• Betula litwinowii Doluch. Caucasian Down Birch
• Betula medwediewii Regel Caucasian Birch
• Betula pendula Roth Silver Birch
• Betula recurvata (Ig. Wassil.) V. Vassil. (E)

Carpinus L. Hornbeam

• Carpinus betulus L. Common Hornbeam
• Carpinus orientalis Mill. Oriental Hornbeam
  • Carpinus orientalis subsp. orientalis

Corylus L. Hazel

• Corylus avellana L. Common Hazel
  • Corylus avellana var. avellana L.
  • Corylus avellana var. pontica (C. Koch) Winkler
• Corylus colurna L. Turkish Hazel
• Corylus maxima Mill. Filbert

Ostrya Scop. Hop-hornbeam

• Ostrya carpinifolia Scop. European Hop-hornbeam

• 
  Alnus glutinosa subsp. barbata
• 
  Betula medwediewii
• 
  Betula pendula
• 
  Carpinus betulus
• 
  Corylus avellana
• 
  Corylus colurna
• 
  Ostrya carpinifolia

Wikispecies has information related to Betulaceae.