Altitudinal distribution: subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a taxon with an unresolved nomenclature of unclear application, compared by Nylander with Immersaria athroocarpa, from which it should differ in the smaller ascospores; on siliceous rocks, with some scattered records in Europe, including the Alps. A “L. polygonia Müll. Arg.” as cited in the Swiss checklist does not exist. This epithet goes back to L. fumosa var. polygonia introduced as a nom. nud. by Flotow, Lich. exs. no. 139 (1830), and was also cited by Nylander (Flora 64: 186, 1881) when he published a description under the name “L. polygonia (Flot.)”. If this is the protologue, the taxon has to be ascribed to Nylander as L. polygonia Flot. ex Nyl. A further complication is that Körber (Systema: 253, 1855) citing also the exsiccatum of Flotow, apparently published a taxon “L. fumosa α [var.] nitida [f.] polygonia Flot.” that has to be ascribed to Körber. This name, however, was not cited by Nylander, and therefore cannot be the protologue of Nylander’s species.
