Lepraria rigidula (B. de Lesd.) Tønsberg

A common Lepraria species which may be identified directly in the field thanks to its whitish colour and long projecting hyphae from soredia. Most often, it grows on slightly acidic bark of deciduous trees but in suitable habitats it may be abundant also on conifers. Lepraria rigidula is one of the few Lepraria species that do not avoid sunny and rain-exposed places. Its occurrence on various siliceous rocks in not exceptional. The lichen may be seen in open forests and in open landscape. It is one of the most common genus members in Europe and in the Czech Republic.

Ascomycota → Lecanoromycetes → Lecanorales → Stereocaulaceae → Lepraria