Buellia spuria (Schaer.) Anzi

Cat. Lich. Sondr.: 87, 1860. Basionym: Lecidea spuria Schaer. - Lich. Helv. Spicil., Sect. 3: 127, 1828.
Synonyms: Buellia italica A. Massal.; Buellia italica var. insularis Bagl.; Buellia italica var. lactea (A. Massal.) A. Massal.; Buellia italica var. recobarina (A. Massal.) Körb.; Buellia lactea (A. Massal.) Körb.; Buellia lactea var. olivaceofusca Anzi; Buellia liguriensis B. de Lesd.; Buellia olivaceofusca (Anzi) Zahlbr.; Buellia spuria var. recobarina (A. Massal.) Jatta; Catolechia lactea A. Massal.; Catolechia recobarina A. Massal.
Distribution: N - VG (Scheidegger & al. 2001), Ven (Lazzarin 2000b), TAA, Lomb, Piem (Isocrono & al. 2004), VA (Matteucci & al. 2015c), Emil (Fariselli & al. 2020), Lig (Watson 2014). C - Tosc, Abr (Gheza & al. 2021), Sar (Scheidegger 1993, Rizzi & al. 2011). S - Camp (Ricciardi & al. 2000), Pugl, Si (Nimis & al. 1996b).
Description: Thallus crustose, continuous to usually areolate, white to whitish grey, epruinose, phenocorticate, delimited by a conspicuous black prothallus (sometimes visible as a black hypothallus between the areoles). Medulla white, amyloid. Apothecia lecideine (0.2-)0.4-1 mm across, immersed, rarely sessile, with a flat to slightly convex, black disc (often grey-pruinose by necrotic remains of thallus) and a thin, usually persistent proper margin. Proper exciple poorly differentiated, with narrow inner excipular hyphae, prosoplectenchymatous, transient with the deep reddish brown hypothecium, outer excipular hyphae parallel, moderately swollen and strongly carbonized with brown and aeruginose pigments; Epithecium greenish brown to olive, N+ violet; hymenium colourless, not inspersed; paraphyses simple to moderately branched, apically swollen, with a brown pigment cap; hypothecium dark brown. Asci 8-spored, clavate, Bacidia-type. Ascospores 1-septate, brown, oblong to ellipsoid, usually not constricted, with obtuse ends, (9-)11-18 x 5-8 µm. Pycnidia rare, urceolate to globose, unilocular. Conidia bacilliform, 4.5-6 x 0.5-1.5 µm. Photobiont chlorococcoid. Spot tests: thallus K+ yellow-orange, C-, KC-, P- or P+ yellow, UV-; medulla sometimes K+ yellow turning red. Chemistry: atranorin, stictic or norstictic acid, and traces of different accessory substances.
Note: a mild-temperate to subtropical, chemically variable species growing on different types of siliceous rocks, often found also on walls. For a recent description see Giralt & van den Boom (2011).
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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


pH of the substrata:

(info)

1

2

3

4

5

Solar irradiation:

(info)

1

2

3

4

5

Aridity:

(info)

1

2

3

4

5

Eutrophication:

(info)

1

2

3

4

5

Poleotolerance:

(info)

0

1

2

3

Altitudinal distribution:

(info)

1

2

3

4

5





P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (12862)
2001/11/01



Felix Schumm; Owner: CC BY-SA 4.0
[TSB_12862], Italy, Tuscany, Prov. Livorno, Island of Capraia, 12 m, on tuff. Leg. P.L. Nimis, M. Tretiach & M. Castello, 04.1988, rev. Ch. Scheidegger 1989 as Buellia lactea



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (12862)
2001/11/01



Felix Schumm; Owner: CC BY-SA 4.0
[TSB_12862], Italy, Tuscany, Prov. Livorno, Island of Capraia, 12 m, on tuff. Leg. P.L. Nimis, M. Tretiach & M. Castello, 04.1988, rev. Ch. Scheidegger 1989 as Buellia lactea



Felix Schumm; Owner: CC BY-SA 4.0
[TSB_12862], Italy, Tuscany, Prov. Livorno, Island of Capraia, 12 m, on tuff. Leg. P.L. Nimis, M. Tretiach & M. Castello, 04.1988, rev. Ch. Scheidegger 1989 as Buellia lactea



Felix Schumm - CC BY-SA 4.0
[TSB_12862], Italy, Tuscany, Prov. Livorno, Island of Capraia, 12 m, on tuff. Leg. P.L. Nimis, M. Tretiach & M. Castello, 04.1988, rev. Ch. Scheidegger 1989 as Buellia lactea



Felix Schumm - CC BY-SA 4.0
[TSB_12862], Italy, Tuscany, Prov. Livorno, Island of Capraia, 12 m, on tuff. Leg. P.L. Nimis, M. Tretiach & M. Castello, 04.1988, rev. Ch. Scheidegger 1989 as Buellia lactea



Felix Schumm - CC BY-SA 4.0
[TSB_12862], Italy, Tuscany, Prov. Livorno, Island of Capraia, 12 m, on tuff. Leg. P.L. Nimis, M. Tretiach & M. Castello, 04.1988, rev. Ch. Scheidegger 1989 as Buellia lactea



Felix Schumm - CC BY-SA 4.0
[TSB_12862], Italy, Tuscany, Prov. Livorno, Island of Capraia, 12 m, on tuff. Leg. P.L. Nimis, M. Tretiach & M. Castello, 04.1988, rev. Ch. Scheidegger 1989 as Buellia lactea



Felix Schumm - CC BY-SA 4.0
[TSB_12862], Italy, Tuscany, Prov. Livorno, Island of Capraia, 12 m, on tuff. Leg. P.L. Nimis, M. Tretiach & M. Castello, 04.1988, rev. Ch. Scheidegger 1989 as Buellia lactea



Felix Schumm - CC BY-SA 4.0
[TSB_12862], Italy, Tuscany, Prov. Livorno, Island of Capraia, 12 m, on tuff. Leg. P.L. Nimis, M. Tretiach & M. Castello, 04.1988, rev. Ch. Scheidegger 1989 as Buellia lactea



Felix Schumm - CC BY-SA 4.0
[TSB_12862], Italy, Tuscany, Prov. Livorno, Island of Capraia, 12 m, on tuff. Leg. P.L. Nimis, M. Tretiach & M. Castello, 04.1988, rev. Ch. Scheidegger 1989 as Buellia lactea



Felix Schumm - CC BY-SA 4.0
[TSB_12862], Italy, Tuscany, Prov. Livorno, Island of Capraia, 12 m, on tuff. Leg. P.L. Nimis, M. Tretiach & M. Castello, 04.1988, rev. Ch. Scheidegger 1989 as Buellia lactea