Riccia crystallina L.
Plantae | Marchantiophyta | Marchantiopsida | Marchantiales | Ricciaceae | Riccia | Riccia crystallina
alluvial mud banks of slough by island
Between Old St. Genevieve and Old Kaskaskia in Mississippi River bottoms west of Kaskaskia Island, and by slough separating Kaskaskia Island at northwest end from Missouri mainland, 3.5-4.5 miles (by air) SSE of Ste. Genevieve