hortensia vs Hydrangea macrophylla hortensis

hortensia and Hydrangea macrophylla hortensis both are nouns.

Word	Noun	Adjective	Verb	Adverb
hortensia	Yes	No	No	No
Hydrangea macrophylla hortensis	Yes	No	No	No

As nouns, hortensia and Hydrangea macrophylla hortensis are synonyms defined as:

hortensia and Hydrangea macrophylla hortensis: deciduous shrub bearing roundheaded flower clusters opening green and aging to pink or blue

hortensia (noun)	Hydrangea macrophylla hortensis (noun)
deciduous shrub bearing roundheaded flower clusters opening green and aging to pink or blue	deciduous shrub bearing roundheaded flower clusters opening green and aging to pink or blue
very tall branching herb with showy much-doubled yellow flower heads