]> GH barcode-01746124 United States of America Virginia In Broad Run at bridge over highway from Broad Run station to R 55. Western slope of Bull Run Mountains Potamogeton pusillus subsp. tenuissimus (Mertens & Koch) R. R. Haynes & Hellquist (Mertens & Koch) R. R. Haynes & Hellquist 2021-03-22 15:57:03 H. A. Allard