mouse-ear hawkweed vs Hieracium pilocella

mouse-ear hawkweed and Hieracium pilocella both are nouns.

Word	Noun	Adjective	Verb	Adverb
mouse-ear hawkweed	Yes	No	No	No
Hieracium pilocella	Yes	No	No	No

As nouns, mouse-ear hawkweed and Hieracium pilocella are synonyms defined as:

mouse-ear hawkweed and Hieracium pilocella: European hawkweed having soft hairy leaves; sometimes placed in genus Hieracium

Other synonyms of mouse-ear hawkweed include Pilosella officinarum.

mouse-ear hawkweed (noun)	Hieracium pilocella (noun)
European hawkweed having soft hairy leaves; sometimes placed in genus Hieracium	European hawkweed having soft hairy leaves; sometimes placed in genus Hieracium