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 #: PH00145914
Thomas A. Williams #218 00 May 1898
Mycoporum pycnocarpum Nyl.
United States, District of Columbia, Takoma Park, D. C.

Montana State University Herbarium - Lichen
Catalog #: MONT-L-0004586
Thos. A. Williams #218 00 May 1898
Mycoporum compositum (A. Massal.) R.C. Harris
United States, Maryland, Montgomery, Takoma Park, D.C. (?)