Hamamelis virginiana vs Virginian witch hazel

Hamamelis virginiana and Virginian witch hazel both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hamamelis virginiana	Yes	No	No	No
Virginian witch hazel	Yes	No	No	No

As nouns, Hamamelis virginiana and Virginian witch hazel are synonyms defined as:

Hamamelis virginiana and Virginian witch hazel: common shrub of eastern North America having small yellow flowers after the leaves have fallen

Hamamelis virginiana (noun)	Virginian witch hazel (noun)
common shrub of eastern North America having small yellow flowers after the leaves have fallen	common shrub of eastern North America having small yellow flowers after the leaves have fallen