New records of lichens and lichenicolous fungi from La Gomera (Canary Islands, Spain), including the new species: Usnea boomiana P. Clerc Author van den Boom, Pieter P. G. Arafura 16, NL- 5691 JA Son, The Netherlands pvdboom@kpnmail.nl Author Clerc, Philippe Conservatoire et Jardin botaniques de la Ville de Genève, C. P. 60, 1292 Chambésy, Switzerland Author Ertz, Damien Botanic Garden Meise, Department Bryophytes-Thallophytes, Nieuwelaan 38, 1860 Meise, Belgium text Candollea 2015 2015-12-31 70 2 165 177 http://dx.doi.org/10.15553/c2015v702a1 journal article 10.15553/c2015v702a1 2235-3658 5720974 Usnea wasmuthii Räsänen Notes . – In the Canary Islands , this species was known from La Palma. It occurs on Tenerife as well. Details on this taxon are given in CLERC (2011) . Both specimens collected on La Gomera have salazinic and barbatic acids in the medulla. Material examined . – 56 , Cs, P . Clerc G26119 ; 63 , Eu, P. Clerc G26120 .