lizard's-tail vs bog plant

lizard's-tail and bog plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
lizard's-tail	Yes	No	No	No
bog plant	Yes	No	No	No

As nouns, bog plant is a hypernym of lizard's-tail; that is, bog plant is a word with a broader meaning than lizard's-tail:

lizard's-tail: North American herbaceous perennial of wet places having slender curled racemes of small white flowers
bog plant: a semiaquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath

Other hypernyms of lizard's-tail include marsh plant, swamp plant.

lizard's-tail (noun)	bog plant (noun)
North American herbaceous perennial of wet places having slender curled racemes of small white flowers	a semiaquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath