London plane vs genus Platanus

London plane and genus Platanus both are nouns.

Word	Noun	Adjective	Verb	Adverb
London plane	Yes	No	No	No
genus Platanus	Yes	No	No	No

London plane (noun)	genus Platanus (noun)
very large fast-growing tree much planted as a street tree	genus of large monoecious mostly deciduous trees: London plane; sycamore