World distribution: The species is distributed in the warmer areas of the world (Hafellner et al. 1979). It is widespread in southern Europe (Barkman 1958) and more scattered in central Europe (e.g. Wirth 1987). The distribution area outside Europe includes Saudi Arabia, East Africa, Central, North and South America, Australia, New Zealand (Coppins 1992a), and Japan (Kashiwadani 1985). In Sweden there are two extant localities (Aronsson et al. 1995). It is not known from Denmark (Alstrup & Søchting 1989) or Finland
Ecology: Results. Recorded substrate trees were Quercus sp(p). and Acer pseudoplatanus. In one locality the substrate was c. 15 years old twigs of a huge Quercus. The species was restricted to open, parklike habitats within small villages close to the sea-level. In one old monastery garden (3571) even fertile, well-developed specimens were found. Discussion. From central Europe, where the species is more common, it has been referred to the 'Xanthorion' alliance (Barkman 1958, James et al. 1977). Similar description of floristic associates are given by Degelius (1957) from Sweden. Typically localities for the 'Xanthorion' assemblage are nutrient-rich substrates, usually in well-lit situations, bird-dropping sites, or along dusty roads (Barkman 1958, James et al. 1977). The three Norwegian localities are likely to receive nutrient-rich depositions from surrounding agricultural land. Hyperphyscia adglutinata is believed to tolerate moderate pollution in England (Hawksworth & Rose 1970). From central Europe, a plant community with H. adglutinata has been described as heliophytic, preferring lower parts of the south side of isolated trees with subneutral, more or less smooth bark (Barkman 1958). The ability of the species to inhabit smooth bark and relatively young twigs may indicate pioneer characteristics like rapid growth and efficient dispersal
Threats: Results. None. Discussion. Hyperphyscia adglutinata is moderately toxitolerant, occurring in the center of small and medium-sized villages in the Netherlands (Barkman 1958), so air pollution is hardly a threat in Norway. Felling of host trees possibly represents a threat to this rare species
Status: One of the two old localities were visited. The species was not found, and the status was considered as uncertain. One new locality was discovered during the field work (3571). Due to its small size, the species may have been overlooked in parks, private gardens, and farms in southwestern Norway
Specimens in other herbaria, litterature, etc.