Noteworthy Additions to the Vascular Flora of

Rockingham County, located in northwestern Virginia, is the third largest county in the state and is botanically rich and diverse. Over the past few decades, it has experienced unprecedented population growth and the loss of undisturbed habitat that accompanies such growth. This study updates the documented flora of Rockingham County, so that it may serve as a baseline for future studies, as well as provide new plant distribution information for the Flora of Virginia Project. During the course of this study, 425 numbers representing 316 species, subspecies, and varieties were collected. Fifty-two county records are reported. Five of these, Abies balsamea, Alnus incana ssp. rugosa, Calycanthus floridus var. glaucus, Scutellaria incana, and Penstemon hirsutus, are listed on the Virginia Department of Conservation and Recreation's (Division of Natural Heritage) Rare Vascular Plant List. Two others, Sanicula trifoliata and Helianthus hirsutus, are currently listed on the Virginia Vascular Plant Watch List.