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"a genus of algae. P.nivalis (red-snow) appears on the surface of snow, tinging extensive tracts in the Arctic regions or amongst the Alps, in an incredibly short space of time, with a deep crimson. This plant may be regarded a s one of the simplest forms of vegetation." -Marshall

Protococcus Algae

"a genus of algae. P.nivalis (red-snow) appears on the surface of snow, tinging extensive tracts in…