Here's why:
* Formal regions are defined by official boundaries, such as state lines, county lines, or political districts. They are often based on objective criteria like population density, climate, or economic activity.
* Vernacular regions are defined by the perceptions and shared understandings of the people who live in them. They are often based on cultural factors like language, dialect, cuisine, or shared history.
The Piney Woods is a vernacular region because:
* It's defined by its unique ecosystem: The region is characterized by its dense pine forests, acidic soils, and a distinct plant and animal life.
* It's recognized by its inhabitants: People who live in the Piney Woods often identify themselves as "Piney Woods people" and share a sense of community and regional identity.
* It's not defined by official boundaries: While the region encompasses parts of several states (Texas, Louisiana, Arkansas, Mississippi, and Alabama), there are no official borders that delineate it.
Therefore, the Piney Woods is a region based on shared cultural and environmental characteristics, making it a vernacular region, not a formal one.