orchid family vs genus Pterostylis

orchid family and genus Pterostylis both are nouns.

Word	Noun	Adjective	Verb	Adverb
orchid family	Yes	No	No	No
genus Pterostylis	Yes	No	No	No

orchid family (noun)	genus Pterostylis (noun)
enormous cosmopolitan family of perennial terrestrial or epiphytic plants with fleshy tubers or rootstocks and unusual flowers	genus of terrestrial orchids of Australia and New Zealand and western Pacific