Abstract
This paper presents new records of 180 lichen species from Bolivia; 103 are new national records. Three species, Bryonora curvescens (Mudd) Poelt (also from Ecuador), Lepraria elobata Tønsberg and Pyrenula laetior Müll.
Arg., are reported for the first time from the Southern Hemisphere, and five, Bathelium aff. sphaericum (C. W.
Dodge) R. C.
Harris, Lepraria jackii Tønsberg, Psiloparmelia arhizinosa Hale, Szczawinskia tsugae A. Funk and Trinathotrema lumbricoides (Sipman) Sipman & Aptroot, are new to South America.
To complement the rather poorly recognized distribution of some species, five of the taxa reported here are also new to Ecuador. Notes on distribution and chemistry are provided for most species, and some, especially those belonging to taxonomically critical groups, are discussed in greater detail.