poker plant vs kniphofia

poker plant and kniphofia both are nouns.

Word	Noun	Adjective	Verb	Adverb
poker plant	Yes	No	No	No
kniphofia	Yes	No	No	No

As nouns, kniphofia is a hypernym of poker plant; that is, kniphofia is a word with a broader meaning than poker plant:

poker plant: clump-forming plant of South Africa with spikes of scarlet flowers
kniphofia: a plant of the genus Kniphofia having long grasslike leaves and tall scapes of red or yellow drooping flowers

Other hypernyms of poker plant include flame-flower, flame flower, flameflower, tritoma.

poker plant (noun)	kniphofia (noun)
clump-forming plant of South Africa with spikes of scarlet flowers	a plant of the genus Kniphofia having long grasslike leaves and tall scapes of red or yellow drooping flowers