Additions to the knowledge of the genus Cladonia (cladoniaceae, lichenized ascomycotina) in the alpine belt of the pyrenees in Andorra

(ENG) Field and laboratory studies of the lichen genus Cladonia in the alpine meadows of Andorra (NE of Spain, Iberian Peninsula), yielded 24 taxa: 19 species, 3 subspecies and 2 unidentified taxa. Cladonia galindezii, earlier believed to be endemic to the Antarctic, is reported for the first time from the Northern Hemispheire. C. asahinae, C. macroceras, and chemotypes IV of C. subcariosa and II of C. pyxidata are new reports for Europe. The lichen substances, reported for each taxon, and the altitudinal distribution are discussed.