human
Write a short description of a wild scene in the wilderness with lichen, bulrush, and boulders.
assistant
Fewer grasses are growing here where the streambed has backed up and spread out into a large muddy swamp. Boulders sunk into the mud support a riotous growth of moss and lichen. Bulrush shoots up between the boulders, grasslike plants supporting clusters of purple thorns at the tips.