Lecanora mughicola Nyl.

Flora, Regensburg 55: 248 (1872)

 

 

Protologue: Italy. Ad nudos exsiccatorum Mughorum ramos in alpibus Rhaeticis, Anzi, Lich. Lang. 376 (H-Nyl 26738!, holotype; M!, isotype).

Type locality: Italy, Province Sondrio ?, on bare dry twigs of Pinus mugho in alpibus Rhaeticis, Anzi, Lich. Lang. 376 (H-Nyl 26738 - holotype; M - isotype).

Description: Lichen. Thallus crustose, rimose or warted-areolate, esorediate; areoles rectengular to more or less irregular in outline, 0.25-0.55(-1.0) mm in diam., flat to moderately, rarely strongly convex, surface yellowish beige to ochre, sometimes with a greenish tinge, matt or more often slightly glossy. Apothecia rounded to mostly irregular or flexuose in outline, rarely single, mostly densely crowded, appressed or sessile with a broad or weakly constricted base, av. diam. 0.35-0.55 mm, max. diam. 0.65-1.00 mm ; disc orange-brown to dark brown, often with dark grayish or bluish discoloration or nearly black, flat to weakly convex, finely white to bluish gray pruinose, matt or rarely slightly glossy; margin (weakly) prominent on young apothecia, persistent, slightly crenulate, mostly slightly glossy. Amphithecium corticate, laterally 35-125 µm, basally (55-)110-165 µm wide, often with small brownish granules especially around medulla, medulla with irregularly entangled, short-celled hyphae with lumina 1-2 µm wide, cortex 10-40 µm wide above, (10-)35-60 µm near base, of strongly gelatinized hyphae with lumina of (1.0-)1.5-3.0 µm; parathecium 15-40 µm wide; hypothecium (5-)45-100 µm high, colorless or faintly brown; subhymenium 25-80µm high; hymenium (35-)45-55 µm high, colorless to yellowish brown; epihymenium 10-15µm high, sordid ochre to blackish brown with a turquoise tinge, of blackish apical cells of paraphyses and brown granules; paraphyses simple or weakly branched and anastomosing, with 1.0-1.5 µm, apically 1.2-2.0 µm wide lumina. Ascospores colorless, simple, rarely 1-septate, (7.0-)8.5-11.9(-14.0) x (3.0-)3.5-4.6(-5.5) µm. Pycnidia immersed, irregularly chambered, colorless; conidia fusiform to bacilliform, 4.0-5.5 x 1.0-1.5 µm (Printzen 2001: 400).

Photobiont: Data lacking.

Chemistry: Thallus C-, K-, P-; isousnic acid.