New occurrence of Heterodermia (Lichens - Pyxinaceae) in Rio Grande do Sul, Brasil

Abstract

Heterodermia hypoleuca (Muhl.) Trev. and H. squamulosa (Degel.) W. Culb. are reported as new to Brasil, and H. corallophora (Taylor) Skorepa, H. microphylla (Kuork.) Skorepa, H.' trichophora (Kurok.) S. Eliasaro (new combination) are added to the known flora of Rio Grande do Sul state.

Heterodermia; lichens; floristics