sphagnum moss vs sphagnum

sphagnum moss and sphagnum both are nouns.

Word	Noun	Adjective	Verb	Adverb
sphagnum moss	Yes	No	No	No
sphagnum	Yes	No	No	No

As nouns, sphagnum moss and sphagnum are synonyms defined as:

sphagnum moss and sphagnum: any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat

Other synonyms of sphagnum moss include bog moss, peat moss.

sphagnum moss (noun)	sphagnum (noun)
any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat	any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat