LICHENES NOVÆ ANGLIÆ

Determined and Prepared by R. Heber Howe, Jr.
Thoreau Museum of Natural History
Concord, Massachusetts.

No. 18. Umbilicaria Pennsylvanica, Hoffm.

Rhode Island, Middletown. March 2, 1909.

On ledges,—south-west.

Coll. by G. B. Blaine.

Yale University Herbarium

YU.237747