Opera Bot., 42: 109, 1977. Basionym: Alectoria nidulifera f. simplicior Vain. - Meddeland. Soc. Fauna Fl. Fenn., 6: 115, 1881.
Synonyms: Alectoria simplicior (Vain.) Lynge; Bryopogon simplicior f. albidosorediosus Gyeln.
Distribution: N - TAA (Nascimbene & al. 2007b), VA (Valcuvia 2000, Matteucci & al. 2008).
Description: Thallus fruticose, tufted, attached by a basal holdfast, to 5 cm long, dark brown to blackish brown, without distinct main branches, branching with acute angles, the branches mostly terete, often with abundant lateral spinules. Soralia sparse to usually abundant, fissural, broader than the branches on which they develop, usually greenish black. Pseudocyphellae absent; medulla white, compact. Apothecia unknown. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-. Chemistry: no lichen substances or sometimes fatty acids.
Note: a boreal-montane, circumpolar lichen found on isolated conifers in the mountains, to be looked for throughout the Alps. It is included in the Italian red list of epiphytic lichens as “Endangered” (Nascimbene & al. 2013c).
Growth form: Fruticose filamentous
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)