lemon lily vs Hemerocallis lilio-asphodelus

lemon lily and Hemerocallis lilio-asphodelus both are nouns.

Word	Noun	Adjective	Verb	Adverb
lemon lily	Yes	No	No	No
Hemerocallis lilio-asphodelus	Yes	No	No	No

As nouns, lemon lily and Hemerocallis lilio-asphodelus are synonyms defined as:

lemon lily and Hemerocallis lilio-asphodelus: a day lily with yellow flowers

Other synonyms of lemon lily include Hemerocallis flava.

lemon lily (noun)	Hemerocallis lilio-asphodelus (noun)
a day lily with yellow flowers	a day lily with yellow flowers