"I just came across this term marking a line point on 2 adjoining
plats..."small bastard box""
Polygala chambuxus is native to European mountain areas. In the UK it is sometimes found
as a garden plant, called "ground box" - understandably, since it only grows
about 6" high. More likely as a boundary marker is the false box or false boxwood,
Cynoxylon floridum, known these days as flowering dogwood - easily recognised, and native
to your area. The moral is never trust the OED!