wavy-leaved aster vs aster

wavy-leaved aster and aster both are nouns.

Word	Noun	Adjective	Verb	Adverb
wavy-leaved aster	Yes	No	No	No
aster	Yes	No	No	No

As nouns, aster is a hypernym of wavy-leaved aster; that is, aster is a word with a broader meaning than wavy-leaved aster:

wavy-leaved aster: a variety of aster (Symphyotrichum undulatum)
aster: any of various chiefly fall-blooming herbs of the genus Aster with showy daisylike flowers

wavy-leaved aster (noun)	aster (noun)
a variety of aster (Symphyotrichum undulatum)	star-shaped structure formed in the cytoplasm of a cell having fibers like rays that surround the centrosome during mitosis
	any of various chiefly fall-blooming herbs of the genus Aster with showy daisylike flowers