dotted gayfeather vs gayfeather

dotted gayfeather and gayfeather both are nouns.

Word	Noun	Adjective	Verb	Adverb
dotted gayfeather	Yes	No	No	No
gayfeather	Yes	No	No	No

As nouns, gayfeather is a hypernym of dotted gayfeather; that is, gayfeather is a word with a broader meaning than dotted gayfeather:

dotted gayfeather: herb with many stems bearing narrow slender wands of crowded rose-lavender flowers; central United States and Canada to Texas and northern Mexico
gayfeather: any of various North American plants of the genus Liatris having racemes or panicles of small discoid flower heads

Other hypernyms of dotted gayfeather include blazing star, button snakeroot, gay-feather, snakeroot.

dotted gayfeather (noun)	gayfeather (noun)
herb with many stems bearing narrow slender wands of crowded rose-lavender flowers; central United States and Canada to Texas and northern Mexico	any of various North American plants of the genus Liatris having racemes or panicles of small discoid flower heads