Description:
Thallus effuse, widespreading to 510 cm, on soil; made up of flatish, pale brown to grayish areoles 0.20.3 mm across that break down into sorediose granules 0.030.05 mm across. Photobiont chlorococcoid, cells (5)812(15) m diam.
Apothecia flat to slightly convex, lecidine, 0.30.4 mm diam., disk dark to reddish-brown (especially when wet), proper margin 0.05 mm wide, persistent, darker than the disk and slightly raised. Hymenium 7080 m high, epihymenial zone 10 m high, brown (K+ greenish-brown, N+ reddish-brown); paraphyses sparingly branched and anastomosing, septate, 2 m wide, gradually widening to 34 m at the apex, with the upper 10 m with pale brown pigment and with a dark brown cap. Hypothecium composed of randomly arranged, brown pigmented hyphae (K+ greenish-brown, N+ reddish-brown), 45 m wide; periclinally layered and narrower (2 m wide) towards exciple. Exciple brown, composed of randomly radiating hyphae, 56m wide. Asci Lecanora-type, 4550 1215 m, cylindrical, becoming sub-clavate; ascospores simple (rarely 1-septate), hyaline, ellipsoid to somewhat fusiform, 1215(16) 5.56.5 m.
Conidiomata not seen

Chemistry: C, K, Pd; perlatolic acid by TLC.

Remarks: This species is unique within the genus in having a thallus that contains perlatolic acid. The only other Bryonora species known from the southern hemisphere are B. castanea (Hepp) Poelt from New Zealand and Antarctica (Poelt 1983, vstadal & Lewis Smith 2001) which has a thallus containing norstictic acid (K+ red), and B. peltata vstadal from Antarctica (vstadal & Lewis Smith 2001), which has a thallus containing protocetraric acid (Pd+ red).

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Thallus and apothecia


Thallus and apothecia