Bidens coronata vs bur marigold

Bidens coronata and bur marigold both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bidens coronata	Yes	No	No	No
bur marigold	Yes	No	No	No

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

Bidens coronata: North American bur marigold with large flowers
bur marigold: any of several plants of the genus Bidens having yellow flowers and prickly fruits that cling to fur and clothing

Other hypernyms of Bidens coronata include beggar's-ticks, beggar-ticks, burr marigold, sticktight.

Bidens coronata (noun)	bur marigold (noun)
North American bur marigold with large flowers	any of several plants of the genus Bidens having yellow flowers and prickly fruits that cling to fur and clothing