Alnus vulgaris vs Alnus glutinosa

Alnus vulgaris and Alnus glutinosa both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alnus vulgaris	Yes	No	No	No
Alnus glutinosa	Yes	No	No	No

As nouns, Alnus vulgaris and Alnus glutinosa are synonyms defined as:

Alnus vulgaris and Alnus glutinosa: medium-sized tree with brown-black bark and woody fruiting catkins; leaves are hairy beneath

Other synonyms of Alnus vulgaris include common alder, European black alder.

Alnus vulgaris (noun)	Alnus glutinosa (noun)
medium-sized tree with brown-black bark and woody fruiting catkins; leaves are hairy beneath	medium-sized tree with brown-black bark and woody fruiting catkins; leaves are hairy beneath