LICHALP

Verrucaria vindobonensis Zschacke

Syn.: Verrucaria vindobonensis Zschacke var. prominula Servít

Lichenised. Poorly known taxon.

Substrate: calciferous rocks,

Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: a species with a thin, olive-grey, rimose thallus forming patches of c. 1 cm in diam., ascomata (to c. 0.3 mm in diam.) immersed in the centre of the areoles and only slightly protruding, involucrellum adpressed to the perithecial wall and reaching down about one third of the perithecium, and oblong ascospores (hardly reaching 25 µm in length); on limestone at low elevations (records from siliceous rocks need re-evaluation); apparently widespread but perhaps not always distinguished; in the study area reported only from the Eastern (Austria) and the Western (Liguria) Alps.