Hemerocallis vs day lily

Hemerocallis and day lily both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hemerocallis	Yes	No	No	No
day lily	Yes	No	No	No

Hemerocallis (noun)	day lily (noun)
east Asian rhizomatous clump-forming perennial herbs having flowers on long leafless stalks; cosmopolitan in cultivation: day lilies; sometimes placed in subfamily Hemerocallidaceae	any of numerous perennials having tuberous roots and long narrow bladelike leaves and usually yellow lily-like flowers that bloom for only a day
	any of numerous perennials having mounds of sumptuous broad ribbed leaves and clusters of white, blue, or lilac flowers; used as ground cover