Aster tripolium vs aster

Aster tripolium and aster both are nouns.

Word	Noun	Adjective	Verb	Adverb
Aster tripolium	Yes	No	No	No
aster	Yes	No	No	No

As nouns, aster is a hypernym of Aster tripolium; that is, aster is a word with a broader meaning than Aster tripolium:

Aster tripolium: a common European aster that grows in salt marshes
aster: any of various chiefly fall-blooming herbs of the genus Aster with showy daisylike flowers

Aster tripolium (noun)	aster (noun)
a common European aster that grows in salt marshes	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