Phlox stellaria vs phlox

Phlox stellaria and phlox both are nouns.

Word	Noun	Adjective	Verb	Adverb
Phlox stellaria	Yes	No	No	No
phlox	Yes	No	No	No

As nouns, phlox is a hypernym of Phlox stellaria; that is, phlox is a word with a broader meaning than Phlox stellaria:

Phlox stellaria: low mat-forming herb of rocky places in United States
phlox: any polemoniaceous plant of the genus Phlox; chiefly North American; cultivated for their clusters of flowers

Phlox stellaria (noun)	phlox (noun)
low mat-forming herb of rocky places in United States	any polemoniaceous plant of the genus Phlox; chiefly North American; cultivated for their clusters of flowers