Caloplaca ligustica B. de Lesd.

Bull. Soc. Bot. France, 93: 173, 1936.
Synonyms: Caloplaca pyrithromoides (Nyl.) C.W. Dodge; Chrysomma pyrithromoides (Nyl.) M. Choisy & Werner; Lecanora pyracea f. pyrithromoides Nyl.
Distribution: N - Lig. C - Tosc. S - Cal (Herb. Vondrák 10844).
Description: Thallus crustose, thinly episubstratic, pale grey, continuous to rimose. Apothecia biatorine, 0.3-1.5 mm across, usually crowded and sometimes deformed by mutual compression, with a flat to convex, dark reddish brown disc tending to turn dark red to black in older apothecia, the disc contrasting with the margin, which remains red. Epithecium brownish orange, K+ red; hymenium and hypothecium colourless. Asci 8-spored, clavate, Teloschistes-type. Ascospores 1-septate, polarilocular, hyaline, narrowly ellipsoid, 12-20 x 5-8 µm, the septum 2-4 µm thick. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; apothecial disc K+ red. Chemistry: apothecia with chemosyndrome C2 of Søchting (1997): absence of parietin and fragilin and traces of citreorosein andemodinal.
Note: on schists in open habitats, on dry surfaces with a short water flow after rain; poorly understood, but probably a good species, known from Italy, France, and the Iberian Peninsula. The type specimen (PRA-V 03097; syntype?) was morphologically appraised and belongs to Rufoplaca (Vondrák in litt.).
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

Commonnes-rarity: (info)

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

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model
Herbarium samples

Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16764)

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16764)