What is "flow moss"

Flow \Flow\, n.

1. A stream of water or other fluid; a current; as, a flow of water; a flow of blood.

2. A continuous movement of something abundant; as, a flow of words.

3. Any gentle, gradual movement or procedure of thought, diction, music, or the like, resembling the quiet, steady movement of a river; a stream.

   The feast of reason and the flow of soul.
   --Pope.

4. The tidal setting in of the water from the ocean to the shore. See Ebb and flow, under Ebb.

5. A low-lying piece of watery land; -- called also flow moss and flow bog. [Scot.]
   --Jamieson.