Ulmus hollandica vs Dutch elm

Ulmus hollandica and Dutch elm both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ulmus hollandica	Yes	No	No	No
Dutch elm	Yes	No	No	No

As nouns, Ulmus hollandica and Dutch elm are synonyms defined as:

Ulmus hollandica and Dutch elm: any of various hybrid ornamental European shade trees ranging from dwarf to tall

Ulmus hollandica (noun)	Dutch elm (noun)
any of various hybrid ornamental European shade trees ranging from dwarf to tall	any of various hybrid ornamental European shade trees ranging from dwarf to tall