State Botanist John Townsend, with Virginia DCR Natural Heritage Program, surveying flora.
Maryland State Botanist Chris Frye examining
sedge (Carex spp.) specimens.
Botanist John Parrish studying Hawthorn
species (Crataegus spp.) in Alexandria.
Brent Steury, Natural Resources Program Manager with the National Park Service, documenting crabapple species (Malus spp.)
along the GWMP in Alexandria.