Fagus pendula vs Fagus sylvatica pendula

Fagus pendula and Fagus sylvatica pendula both are nouns.

Word	Noun	Adjective	Verb	Adverb
Fagus pendula	Yes	No	No	No
Fagus sylvatica pendula	Yes	No	No	No

As nouns, Fagus pendula and Fagus sylvatica pendula are synonyms defined as:

Fagus pendula and Fagus sylvatica pendula: variety of European beech with pendulous limbs

Other synonyms of Fagus pendula include weeping beech.

Fagus pendula (noun)	Fagus sylvatica pendula (noun)
variety of European beech with pendulous limbs	variety of European beech with pendulous limbs