Circinaria hispida (Mereschk.) A. Nordin, Savić & Tibell

Mycologia, 102: 1346, 2010. Basionym: Aspicilia hispida Mereschk. - Excurs. Lichenol. Stepp. Kirgis.: 35, 1911.
Synonyms: Agrestia cyphellata J.W. Thomson; Agrestia hispida (Mereschk.) Hale & W.L. Culb.; Circinaria hispida (Mereschk.) A. Nordin, Savic & Tibell; Lecanora hispida (Mereschk.) Zahlbr.,
Distribution: N - Piem (Hafellner & al. 2004, Sohrabi & al. 2011, 2013, 2023). C - Abr (Gheza & al. 2021, Di Nuzzo & al. 2021, Vallese & al. 2022).
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 situations, 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, cryptolecanorine-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 a thin, 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)

Commonnes-rarity: (info)

Alpine belt: extremely rare
Subalpine belt: extremely rare
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model
Herbarium samples

P.L. Nimis CC BY-SA 4.0
TSB 2473

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (2473)