bur marigold vs subshrub

bur marigold and subshrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
bur marigold	Yes	No	No	No
subshrub	Yes	No	No	No

As nouns, subshrub is a hypernym of bur marigold; that is, subshrub is a word with a broader meaning than bur marigold:

bur marigold: any of several plants of the genus Bidens having yellow flowers and prickly fruits that cling to fur and clothing
subshrub: low-growing woody shrub or perennial with woody base

Other hypernyms of bur marigold include suffrutex.

bur marigold (noun)	subshrub (noun)
any of several plants of the genus Bidens having yellow flowers and prickly fruits that cling to fur and clothing	low-growing woody shrub or perennial with woody base