LICHALP

Usnea silesiaca Motyka

Syn.: Usnea madeirensis Motyka

Lichenised.

Substrate: bark

Altitudinal distribution: montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: a species resembling U. subfloridana in the rigid, shrubby to rarely (in the Alps) pendant thallus with black base and many annulations, with more or less even, orbicular soralia and a thin medulla, containing salazinic acid; on acid bark, mostly on branches; widespread in the Holarctic region, in Europe most common in the West; from the Alps there are only some scattered records.