Decades of North American Lichenms.

CLARA E. CUMMINGS, THOS. A WILLIAMS AND A. B. SEYMOUR.

253. Trypethelium virens, Tuck.
On Fagus ferruginea.

Plymouth, New Hampshire. Apr., 1897.

Coll. Clara E. Cummings.

Yale University Herbarium

YU.236086