mayapple vs herb

mayapple and herb both are nouns.

Word	Noun	Adjective	Verb	Adverb
mayapple	Yes	No	No	No
herb	Yes	No	No	No

As nouns, herb is a hypernym of mayapple; that is, herb is a word with a broader meaning than mayapple:

mayapple: North American herb with poisonous root stock and edible though insipid fruit
herb: a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests

Other hypernyms of mayapple include herbaceous plant.

mayapple (noun)	herb (noun)
North American herb with poisonous root stock and edible though insipid fruit	aromatic potherb used in cookery for its savory qualities
	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests