LICHALP

Leptorhaphis tremulae Körb.

Syn.: Arthopyrenia tremulae (Körb.) Müll. Arg., Leptorhaphis sphenospora (Nyl.) Arnold, Sagedia tremulae (Körb.) Anzi, Verrucaria sphenospora Nyl., Verrucaria tremulae (Körb.) Harm.

Non- or doubtfully lichenised.

Substrate: bark

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 an endosubstratic, inconspicuous thallus, ascomata of about equal size as in L. atomaria but asci 8- to 16-spored, ascospores smaller (about 15-25 × 3-4.5 µm); on the smooth bark of Populus, especially P. tremula, more rarely of Salix; rare in temperate Europe and Eastern North America; most records are historical and in the Alps it was only reported from a few scattered localities.