Cummings, Williams & Seymour, Lich. Bor.-Amer. [Wellesley (Massachusetts)]
Cummings, C.E.; Williams, T.A.; Seymour, A.B. [1-280]
IndExs #238641321

Academy of Natural Sciences of Drexel University - Lichens
Catalog #: PH00101550
Thomas A. Williams #223 30 May 1898
Ramalina fraxinea (L.) Ach.
United States, District of Columbia, Rock Creek;