Alnus glutinosa (L.) Gaertn. subsp. glutinosa
Deciduous tree commonly named alder that thrives in moist soils, reaching to a height of 20-30 m. Anthesis occurs from February to March and seed maturation on October. It grows in deep and moist, clay-sandy soils, often almost in the water, in streams or rivers, usually, at altitudes of 0-1500 m. It needs plenty of light, grows quickly at an early age, stabilizes the river banks very effectively and is very resistant to pruning and flooding. It mainly occurs in North and Central Greece but extends to the Northwest Peloponnese, and to some of the larger islands. It is distributed in most parts of Europe, North Africa, Anatolia and the Caucasus. The species is resistant to atmospheric pollution, capable of capturing atmospheric nitrogen with rootstocks. Alnus glutinosa is a taxon characteristic of the '91E0* priority habitat: Alluvial forests with Alnus glutinosa and Fraxinus excelsior', which has its southern limit of spreading to Greece. Greece is also the southern part of the species distribution in Europe.