Review of recent literature and studies on large and mainly recent collections of lichens and lichenicolous fungi led to the addition of 35 taxa to the flora of Belgium, Luxembourg and northern France: Abrothallus buellianus, Absconditella delutula, Acarospora glaucocarpa var. conspersa, Anema nummularium, Anisomeridium ranunculosporum, Arthonia epiphyscia, A. punctella, Bacidia adastra, Brodoa atrofusca, Caloplaca britannica, Cercidospora macrospora, Chaenotheca laevigata, Collemopsidium foveolatum, C. sublitorale, Coppinsia minutissima, Cyphelium inquinans, Involucropyrenium squamulosum, Lecania fructigena, Lecanora conferta, L. pannonica, L. xanthostoma, Lecidea variegatula, Micarea micrococca, Micarea subviridescens, M. vulpinaris, Opegrapha prosodea, Parmotrema stuppeum, Placynthium stenophyllum var. isidiatum, Porpidia striata, Pyrenidium actinellum, Thelopsis rubella, Toninia physaroides, Tremella coppinsii, Tubeufia heterodermiae, Verrucaria acrotella and Vezdaea stipitata. Three species are to be deleted from that flora: Brodoa intestiniformis, Fuscopannaria saubinetii and Squamarina oleosa.