Rolstad, J. & E. Rolstad 2011: Fertile population of Evernia divaricata for the first time in Norway. - Blyttia 69(1): 5-10. [RLL List # 223 / Rec.# 32972] Abstract: The red-listed epiphytic lichen Evernia divaricata has only rarely been found with fruiting or sorediate thalli and, until recently, not in Norway. In August 2009, we revisited a previously known locality within the TrillemarkaRollagsfjell nature reserve and found, for the first time in Norway, abundant fertile thalli along a 1.2 km stretch of a small brook. Closer examination of samples taken from the same locality in 2003 revealed that immature fruiting-bodies (apothecia) were present on a few thalli at that time. Today the site is characterized by old mixed conifer forest and small bogs. Two additional Norwegian localities have been found to harbour fertile E. divaricata. At yet another locality we found one thallus with abundant large soralia, also recorded for the first time in Norway. Lack of small sprouting thalli with basal holdfasts suggests that dispersal, until now, has mainly occurred by means of thallus fragmentation, thereby hampering efficient long-distance dispersal.
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