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In recent years, the expansion of the southern suburbs of Washington, D. into Northern Virginia has introduced an urban heat island primarily caused by increased absorption of solar radiation in more densely populated areas.
In the lowland tidewater and piedmont, yellow pines tend to dominate, with bald cypress wetland forests in the Great Dismal and Nottoway swamps.
Other common trees and plants include red bay, wax myrtle, dwarf palmetto, tulip poplar, mountain laurel, milkweed, daisies, and many species of ferns.
The largest areas of wilderness are along the Atlantic coast and in the western mountains, where the largest populations of trillium wildflowers in North America are found.
In this region, rivers flow northwest, with a dendritic drainage system, into the Ohio River basin.
In spite of its position adjacent to the Atlantic Ocean, even the coastal areas have a significant continental influence with quite large temperature differences between summer and winter, particularly given the commonwealth climate's subtropical classification, which is typical of states in the Upper South.regions of the United States located between the Atlantic Coast and the Appalachian Mountains.The geography and climate of the Commonwealth are shaped by the Blue Ridge Mountains and the Chesapeake Bay, which provide habitat for much of its flora and fauna.In 1607 the London Company established the Colony of Virginia as the first permanent New World English colony.Virginia's state nickname, the Old Dominion, is a reference to this status.