Distribution: N - Piem (Hafellner & al. 2004, Sohrabi & al. 2011, 2013). C - Abr (Gheza & al. 2021, Di Nuzzo & al. 2021).
Description: Thallus fruticose, erect, basally attached or vagrant, to 2.5 cm tall and 0.5-1.5(-2.5) cm wide, grey to glaucous green, sometimes brownish in very exposed sitautions, branching irregularly or dichotomously, the main branches up to 2 mm thick, but rapidly tapering towards apex, with scattered, conspicuous, white pseudocyphellae. Cortex paraplectenchymatous in outer part, prosoplectenchymatous in inner part, covered with a thin epinecral layer; medulla thick, white. Apothecia extremely rare, lecanorine-aspicilioid, up to 4 mm across, mainly lateral, developing in the widest parts of the main stem, with a black to brown-black, sometimes grey-pruinose disc, and an entire, sometimes white-pruinose thalline margin. Epithecium olive-green, N+ green; hymenium colourless; paraphyses moniliform, the apical cells c. 4 µm wide; hypothecium colourless. Asci 2-4-spored, broadly clavate, the thin outer coat K/I+ blue, the wall and apical dome K/I-. Ascospores 1-celled, hyaline, subglobose, 20-24 µm in diam. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-. Chemistry: without lichen substances.
Note: a terricolous vagrant species of the steppes of Central Asia, with a disjunct distribution in the most continental parts of the Iberian Peninsula, recently found in the mountains of Greece, the Maritime Alps of France (Roux & coll. 2014), and the western Alps (Hafellner & al. 2003).
Growth form: Fruticose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by thallus fragmentation
Subcontinental: restricted to areas with a dry-subcontinental climate (e.g. dry Alpine valleys, parts of Mediterranean Italy)