Lecanora subintricata (Nyl.) Th. Fr.

Lichenogr. Scand., 1: 265, 1871. Basionym: Lecanora varia var. subintricata Nyl. - Flora, 51: 478, 1868.
Synonyms: Lecanora varia var. atrocinerea Schaer.; Lecanoropsis subintricata (Nyl.) M. Choisy
Distribution: N - Frl, TAA (Hinteregger 1994, Nascimbene & al. 2006e, 2007b, van den Boom & Brand 2008), Lomb (van den Boom & Brand 2008), Piem (Isocrono & al. 2004), VA (Borlandelli & al. 1996, Piervittori & Isocrono 1997, 1999), Lig (Giordani & Incerti 2008). C - Sar (TSB 13282). S - Camp (Aprile & al. 2002), Cal (Puntillo 1996).
Description: Thallus crustose, mostly endosubstratic, poorly developed or of dispersed warts, yellowish grey, yellow-green or pale yellowish brown, forming patches to several cm in diam. Areoles rounded to slightly deformed, 0.1-0.3 mm in diam., moderately to strongly convex, ecorticate. Apothecia at first more or less lecanorine, then biatorine, 0.2-0.6 mm across, rounded, sessile and constricted at base, with a beige, ochre, orange- to red-brown finally sometimes brown-black, sometimes finely bluish- or white-pruinose, flat to slightly convex disc, the margin initially strongly prominent and concolorous with thallus, finally more or less excluded or concolorous with disc. Thalline exciple corticate, laterally 40-85(-150) µm wide, not much wider at base, with many algal cells; proper exciple often poorly developed, 10-30 µm wide, brownish in the outer part, which is filled with granules; epithecium pale yellowish brown to olive-brown, with fine and larger yellowish granules soluble in K, N+ reddish violet; hymenium colourless, with orange-brown granules, (25-)30-45(-50) µm high; paraphyses simple or sparingly branched and anastomosing, basally 1-1.2 µm thick, the apical cells to 3 µm wide; hypothecium colourless or pale yellow, to 120 µm high. Asci 8-spored, clavate, Lecanora-type. Ascospores 1-celled, hyaline, narrowly ellipsoid to ellipsoid, 6-10 x 2.5-3.5(-4) µm. Micropycnidia rare; microconidia bacilliform, to 6.5 µm long. Mesopycnidia common, black in upper half, sessile; mesoconidia ellipsoid to short cylindrical, 2.8-3.4 x c. 1.5 µm. Photobiont chlorococcoid. Spot tests: thallus K- or K+ pale yellow, C-, KC+ yellow, P-. Chemistry: usnic acid (major), brialmontin1 (minor).
Note: a circumboreal-montane lichen found on lignum and, more rarely, on the bark of conifers in upland areas.
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: common
Oromediterranean belt: absent
Montane belt: rare
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

Curtis Randall Björk
Canada, British Columbia, Clearwater Valley

Author: Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php