References from the California Lichen Catalog

TUCKERMAN, E. 1872.

Genera Lichenum. An arrangement of the North American lichens. Edwin Nelson, Amherst. 281 pp. + index.

TUCKERMAN, E. 1882.

A synopsis of the North American Lichens. Pt. 1, Boston.

WILLEY, H. 1873a.

A list of North American lichens arranged according to Professor E. Tuckerman's “Genera Lichenum”. New Bedford.