yellow poplar vs genus Liriodendron

yellow poplar and genus Liriodendron both are nouns.

Word	Noun	Adjective	Verb	Adverb
yellow poplar	Yes	No	No	No
genus Liriodendron	Yes	No	No	No

yellow poplar (noun)	genus Liriodendron (noun)
tall North American deciduous timber tree having large tulip-shaped greenish yellow flowers and conelike fruit; yields soft white woods used especially for cabinet work	tulip trees
light easily worked wood of a tulip tree; used for furniture and veneer