pocosin
A low, wooded swamp in (especially coastal) Eastern Maryland, Virginia or the Carolinas; a palustrine wetland with deep, acidic peat soils.
One has to go down "on all fours" to get below the dense tangle of vegetation. Each step in the soft peat is uncertain. The reward is a pocosin community full of wildflowers.
Where it comes from
From an unknown Algonquian word, sometimes suggested to be one meaning "opening out" (the widening of a river, related to Ojibwe baakisin (“it is left open”)), or "swamp on a hill". Alternatively, perhaps related to Abenaki pôgwaso (“very shallow”).
Adapted from the Wiktionary entry pocosin (CC BY-SA 4.0).