Hypericum perforatum, known as Perforate St John's-wort, Common Saint John's wort and St John's wort, is a flowering plant in the family Hypericaceae.The common name St John's wort may be used to refer to any species of the genus Hypericum.ypericum perforatum is native to Europe and Asia but has spread worldwide as an invasive species, including to temperate regions of India, China, Canada and the United States.
About Deep Creek Lake. Located in Garrett County in north-western Maryland, Deep Creek Lake is a man-made reservoir conveniently located a short drive from Morgantown, WV (45 minutes), Pittsburgh (2 hours), Baltimore (3 hours), and Washington DC (3 hours).
Geography [edit]. The river source, 115 miles (185 km) from the Chesapeake, is in the hills of the Maryland Piedmont near the intersection of four counties â Howard, Frederick, Montgomery and Carroll, and only 0.6 miles (0.97 km) from Parr's Spring, the source of the south fork of the Patapsco River.eography [edit]. The river source, 115 miles (185 km) from the Chesapeake, is in the hills of the Maryland Piedmont near the intersection of four counties â Howard, Frederick, Montgomery and Carroll, and only 0.6 miles (0.97 km) from Parr's Spring, the source of the south fork of the Patapsco River.