Candelariella efflorescens R.C.Harris & W.R.Buck. Michigan Bot. 17: 155. 1978.

Westberg, Martin & Clerc, Philippe, 2012, Five species of Candelaria and Candelariella (Ascomycota, Candelariales) new to Switzerland, MycoKeys 3, pp. 1-12 : 5

Candelariella efflorescens R.C.Harris & W.R.Buck. Michigan Bot. 17: 155. 1978.

Holotype.

U.S.A. Michigan: Mackinac Co.: Edge of swamp across highway from Island Point State Forest campground (Hog Island State Forest Campground). 5 Oct 1974, W. R. Buck (MICH, isotype H!).

We can here confirm the presence of Candelariella efflorescens (Fig. 4) in Switzerland by reporting six fertile specimens with c. 30-spored asci. They were collected mainly in the montane belt on deciduous and coniferous trees, mostly close to the ground. The three specimens collected in the framework of the Red List project were identified as Candelariella xanthostigma . As most of the specimens of the small, sorediate Candelariella species are sterile, it is usually not possible to separate between Candelariella efflorescens and Candelariella xanthostigmoides (see under this species) and sterile specimens are referred by us to Candelariella efflorescens agg.

Specimens examined.

Bern: Lauterbrunnen, Stechelberg, alt. 1000 m, 23 Oct 1996, Keller (G 00298407); Graubünden: bei Strada unterhalb der Brücke, alt. 1070 m, 7 Aug 1962, Frey (G 00298406); Malix, alt. 1700 m, 27 May 1999, Dietrich (G 00057815); Seewis im Praettigau, alt. 1240 m, 22 Sept 1995, Groner (G 0057816); Valais: Pfynwald, Preissen, alt. 600 m, 19 Nov 2010 Westberg 10-200 (S F178475); Zeneggen, Eich, alt. 1010-1030 m, 19 Nov 2010, Westberg 10-188 (S F178464).