Liverwort

Liverwort
If you must submerge your pot in water, watch out for Liverwort, as the spoors are distributed in water. Liverwort is a small flat plant related to mosses. This plant is indicative of poor drainage.
The plant reproduces in two ways.

They can be distinguished from the apparently similar liverworts (Marchantiophyta or Hepaticae) by their multi-cellular rhizoids.

Look out for growth of liverwort and algae developing on the soil surface. Remove liverwort as soon as you notice it and regulate your watering to compensate. You may need to re-pot and use a more free draining soil.

As can be seen in the image above, the soil surface was covered in a weed known as Liverwort. Liverwort is a hard to remove weed that prefers wet organic soils; its prescience is a strong indicator of a soil that is too wet and poorly drained.

I used Yaupon Holly and Fukien Tea for the trees accented with clumps of mondo grass and liverwort, the rocks are fresh water corals found in a local river which have a texture similar to volcanic rock.

See also: Plant, Moss, Grow, Trunk, Compost