The lichen flora of the Santa Cruz Peninsula, California - Herre, Albert W. (Albert William), 1868 -1962 (Washington academy of sciences, 1910)

The lichen flora of the United States - Fink, Bruce, 1861 -1927 (University of Michigan Press, 1935)

Lichenaea Africana - Stizenberger, Ernst, 1827 -1895 (In Commission bei A. & J. Köppel, 1890)

Lichenes Americani : quos partim in Flora Indiae Occidentalis descripsit, partim e regionibus diversis Americae obtinuit - Sturm, Jakob, 1771 -1848 (J. Sturm, 1811)

Lichenes exotici a professore W. Nylander descripti vel recogniti : et in herbario Musei Parisiensis pro maxima parte asservati in ordine systematico dispositi sunt - Hue, A. M. (Auguste Marie), 1840 -1907 (apud G. Masson, 1892)