The known range of Phylliscum demangeonii (Moug. & Nestl. ex Mont.) Nyl. is extended south to the Southern Appalachians. Pilophoron cereolus (Ach.) Th. Fr., also found in the Southern Appalachians, was previously known from Mexico and the northern United States. In contrast, the range of Parmelia densirhizinata Kurok. is extended northward from South and Central America to Mexico. Anaptychia microphylla (Kurok.) Kurok. (new to North America) and Anzia ornata (new to the Philippines) show classic distribution patterns involving eastern North America and eastern Asia. Cladonia formosa Asah. is a synonym of Cladonia subpityrea Sandst., a species showing a disjunctive distribution be- tween eastern Asia and the mountains of Mexico and Guatemala. Anzia americana (a new species) and Pseudevernia cladonia (Tuck.) Hale and W. Culb. (new to Mexico) show a disjunctive distribution between the Southern Appalachians and the Mexican highlands.