Author Affiliations +
Roderick H. Simmons,1,* Mark T.. Strong,2 John M. Parrish3
11City of Alexandria Department of Recreation, Parks, and Cultural Activities, 1108 Jefferson Street,
22Department of Botany, MRC-166, National Museum of Natural History, Smithsonian Institution, P.O. Bo
339009 Fairview Road, Silver Spring, Maryland 20910
*email address: Rod.Simmons@alexandriava.gov