A variable species forming (chestnut) brown squamules with central depressions and black apothecia. Nine subspecies are currently recognized (Timdal 1992), five of them occur in Europe. This widely-understood species grows on calcareous soil and rocks from lowlands to high mountains. The thalli are commonly associated with cyanolichens when young. Its European distribution range lies in continental areas of the southern parts. It is very rare in the Czech Republic, collected at only three localities in Český kras (the Bohemian karst) in the past – the Velká hora hill, the Koda Nature Reserve and near Hostim. Recently, a population counting four thalli was confirmed on diabases at Na Hradišti near Hostim (Svoboda 2008).
Literature: Timdal E. (1992): A monograph of the genus Toninia (Lecideaceae, Ascomycetes). – Opera Botanica 110: 1–137. Svoboda D. (2008): Vzácné lišejníky Cladonia peziziformis, Phaeophyscia hirsuta a Toninia tristis v Českém krasu. – Fragmenta Ioannea 9: 35–46.
taxonomic classification:Ascomycota → Lecanoromycetes → Lecanorales → Ramalinaceae → Toninia
Red List (Liška & Palice 2010):EN – endangered
Red List (Malíček 2023):C1 – critically endangered
Occurrence in the Czech Republic
All records: 4, confirmed 4. One click on a selected square displays particular record(s), including their source(s).