Anton Gisler (1820-1888) was an eminent scientist of the Canton of Uri (Switzerland) in the 19th century. As a lichenologist he compiled the catalogue of lichens Lichenes Urienses, which recently was published on the website of the Naturalist Association of the Canton of Uri, www.flora-uri.ch. Distinguished by the richness of crustose lichens Gisler‘s Herbarium and the associated catalogue Lichenes Urienses are of greatest importance for the study of lichens and lichenicolous fungi in Switzerland. As a consequence his lichenological research requires urgent amendments to the actual works on the occurrence of lichens in Switzerland.