fringed polygala vs milkwort

fringed polygala and milkwort both are nouns.

Word	Noun	Adjective	Verb	Adverb
fringed polygala	Yes	No	No	No
milkwort	Yes	No	No	No

As nouns, milkwort is a hypernym of fringed polygala; that is, milkwort is a word with a broader meaning than fringed polygala:

fringed polygala: common trailing perennial milkwort of eastern North America having leaves like wintergreen and usually rosy-purple flowers with winged sepals
milkwort: any of various plants of the genus Polygala

fringed polygala (noun)	milkwort (noun)
common trailing perennial milkwort of eastern North America having leaves like wintergreen and usually rosy-purple flowers with winged sepals	any of various plants of the genus Polygala