水蘚
Sphagnum \Sphag"num\, n. [NL., fr/ Gr. ??? a kind of moss.] (Bot.) A genus of mosses having white leaves slightly tinged with red or green and found growing in marshy places; bog moss; peat moss.
sphagnum n : any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat [syn: {sphagnum moss}, {peat moss}, {bog moss}]