genus Sphagnum vs moss genus

genus Sphagnum and moss genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Sphagnum	Yes	No	No	No
moss genus	Yes	No	No	No

As nouns, moss genus is a hypernym of genus Sphagnum; that is, moss genus is a word with a broader meaning than genus Sphagnum:

genus Sphagnum: a large genus constituting the order Sphagnales: atypical mosses of temperate bogs with leaves that can hold much water
moss genus: a genus of mosses

genus Sphagnum (noun)	moss genus (noun)
a large genus constituting the order Sphagnales: atypical mosses of temperate bogs with leaves that can hold much water	a genus of mosses