Physcia tenella (Scop.) DC.

Basionym: Lichen tenellus Scop., Fl. Carniol. ed. 2, 2: 394 (1772).

 

Synonyms: Index Fungorum

Type(cons.): Czech Republic, Moravia, Mor. Herálec, 1942, Nádvorník, Physc. Exs. 8 (UPS).

 

Thallus: foliose, orbicular to irregular, to 3 cm diameter, often confluent with other thalli forming larger patches, loosely attached. Upper side whitish grey to brownish or blackish (on seashores), without pruina. Lobes ascending, narrow, to 1 mm broad, the tips to 2 mm, margins provided with grey to (mainly at tips) black cilia. Soralia terminal labiate, usually causing the lobe tip widen. Underside white to brownish with few white to black rhizinae. - Apothecia not uncommon, shortly stipitate, to 2 mm diam. Spores 17 - 21 x 7 - 10 µm. Conidiomata sparse to abundant. (Moberg 2002: 38).

Chemistry: Upper cortex K+ yellow. Atranorin. (Moberg 2002: 38).

Ecology: Corticolous or saxicolous, on branches and trunks of various deciduous trees; rocks and wooden structures on the seashore. (Moberg 2002: 38).

Molecular data:

Distribution: Europe and North America, nach Discover Life aber auch in Afrika, Asien und Südamerika. Database

Taxonomy: Moberg (2002: 38) does not accept the infraspecific taxon "marina": "Specimens growing in maritime habitats have been separated as var. marina, but I regard this material as a habitat-induced modification. Presently the German checklist (Wirth et al. 2011) contains a subspecies "marina".