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 #: PH00094694
Thomas A. Williams #211 00 April 1898
Pertusaria pustulata (Ach.) Duby
United States, District of Columbia, Takoma Park

Montana State University Herbarium - Lichen
Catalog #: MONT-L-0005505
Thos. A. Williams #211 00 April 1898
Pertusaria pustulata (Ach.) Duby
United States, District of Columbia, Tacoma Park