Porpidia albocaerulescens (Wulfen) Hertel & Knoph
Mitt. bot. Staatss. München, 20: 476, 1984. Basionym: Lichen albocaerulescens Wulfen in Jacquin - Collect. Bot., 2: 184, 1791 (1788).
Synonyms: Haplocarpon albocaerulescens (Wulfen) M. Choisy; Huilia albocaerulescens (Wulfen) Hertel; Lecidea albocaerulescens (Wulfen) Ach. nomen sed non planta; Lecidea alboflavescens Vain.; Lecidea nitescens Leight.
Distribution: N - VG, Ven, TAA, Lomb, Piem (Isocrono & al. 2004), VA (Piervittori & Isocrono 1999, Matteucci & al. 2015c), Lig. C - Tosc, Sar (TSB 8890). S - Camp (Ricciardi & al. 2000), Cal (Puntillo 1996).
Description: Thallus crustose, epilithic, pale greenish-grey to dark olive-grey, continuous or very finely cracked. Medulla white, I-. Apothecia lecideine, 0.6-1.5(-2.5) mm across, immersed in thallus when young, later sometimes sessile, with a black, thickly white- or grey-pruinose, usually flat, sometimes slightly convex disc, and a non-pruinose, raised proper margin. Proper exciple with a dark pigmented cortex and a hyaline medulla of thin filamentous hyphae (2-3 μm wide), K+ yellow; epithecium olivaceous to brownish grey, with granules, N+ orange, K-; hymenium colourless; hypothecium blackish brown. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened tholus penetrated by a pore, the sides of which stain I/KI+ deep blue, Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid, 18-27(-32) x 7-12(-14) µm. Photobiont chlorococcoid. Spot tests: thallus K- or K- pale yellow, C, KC-, P- or P+ pale orange; medulla K+ orange-yellow, P+ orange. Chemistry: stictic acid (major) cryptostictic acid (minor). Note: on siliceous boulders in sheltered, humid situations, such as in deciduous forests. Several earlier records reported by Nimis (1993: 566) and not checked by Hertel, are not accepted here.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: extremely rare
Padanian area: absent
Humid submediterranean belt: rare
Humid mediterranean belt: extremely rare
Dry mediterranean belt: absent
Predictive model
Herbarium samples
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (12257)
2001/11/29
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (12257)
2001/11/29
Pier Luigi Nimis - CC BY-SA 4.0
TSB 41299
Pier Luigi Nimis - CC BY-SA 4.0
TSB 41299
Pier Luigi Nimis - CC BY-SA 4.0
TSB 41299
Mark Rahill - CC BY-SA 4.0
USA
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: extremely rare
Padanian area: absent
Humid submediterranean belt: rare
Humid mediterranean belt: extremely rare
Dry mediterranean belt: absent
Predictive model
| Herbarium samples |
Index Fungorum
GBIF
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (12257)
2001/11/29
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (12257)
2001/11/29
Pier Luigi Nimis - CC BY-SA 4.0
TSB 41299
Pier Luigi Nimis - CC BY-SA 4.0
TSB 41299
Pier Luigi Nimis - CC BY-SA 4.0
TSB 41299
