Bog moss and Sphagnum

Bog moss noun - Any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat.

Sphagnum is a synonym for bog moss. In some cases you can use "Sphagnum" instead a noun phrase "Bog moss".

Sphagnum noun - Any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat.

Bog moss is a synonym for sphagnum. You can use "Bog moss" instead a noun "Sphagnum".