cat's-ear vs liliaceous plant

cat's-ear and liliaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
cat's-ear	Yes	No	No	No
liliaceous plant	Yes	No	No	No

As nouns, liliaceous plant is a hypernym of cat's-ear; that is, liliaceous plant is a word with a broader meaning than cat's-ear:

cat's-ear: any of several plants of the genus Calochortus having flowers with petals shaped like cat's ears
liliaceous plant: plant growing from a bulb or corm or rhizome or tuber

cat's-ear (noun)	liliaceous plant (noun)
European weed widely naturalized in North America having yellow flower heads and leaves resembling a cat's ears	plant growing from a bulb or corm or rhizome or tuber
any of several plants of the genus Calochortus having flowers with petals shaped like cat's ears