myrtle oak vs Quercus myrtifolia

myrtle oak and Quercus myrtifolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
myrtle oak	Yes	No	No	No
Quercus myrtifolia	Yes	No	No	No

As nouns, myrtle oak and Quercus myrtifolia are synonyms defined as:

myrtle oak and Quercus myrtifolia: small evergreen shrub or tree of southeastern United States; often forms almost impenetrable thickets in sandy coastal areas

Other synonyms of myrtle oak include seaside scrub oak.

myrtle oak (noun)	Quercus myrtifolia (noun)
small evergreen shrub or tree of southeastern United States; often forms almost impenetrable thickets in sandy coastal areas	small evergreen shrub or tree of southeastern United States; often forms almost impenetrable thickets in sandy coastal areas