Stereocaulon vesuvianum Pers. var. nodulosum (Wallr.) I.M. Lamb
Syn.: Stereocaulon denudatum Flörke, Stereocaulon denudatum Flörke var. depressum H. Magn., Stereocaulon vesuvianum Pers. var. denudatum (Flörke) I.M. Lamb ex Poelt comb. inval., Stereocaulon vesuvianum Pers. f. depressum (H. Magn.) I.M. Lamb, Stereocaulon vesuvianum Pers. var. depressum (H. Magn.) I.M. Lamb (non Stereocaulon depressum (Frey) I.M. Lamb!)
Lichenised. Poorly known taxon.
Substrate: siliceous rocks
Altitudinal distribution: alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)
Note: a name used for morphs with glabrous podetia and partly confluent phyllocladia forming plate-like squamules, sorediate or not; reported from both Hemispheres, including Europe, but not always distinguished; probably more widespread in the Alps.
