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Australian Biological Resources Study

Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Lecanora epibryon (Ach.) Ach. subsp. broccha (Nyl.) Lumbsch
  in H.T.Lumbsch, G.B.Feige & J.A.Elix, Pl. Syst. Evol. 191: 229 (1994); Lecanora broccha Nyl., in J.M.Crombie, J. Bot. 13: 21 (1875). T: “Kerguelens Land, Royal Sound”, Dec. 1875, A.E.Eaton; lecto: BM, fide H.T.Lumbsch et al., loc. cit.; isolecto: BM, H-NYL 25759.  
  Thallus thin, dispersed-verrucose to verruculose, yellowish white to yellowish orange, or whitish orange to cream-coloured, epruinose. Soredia absent. Prothallus not visible. Apothecia sessile to slightly constricted at the base, 0.8–2.5 mm diam.; disc pale to dark red-brown or almost black, epruinose; margin concolorous with the thallus, thin, entire, flexuose. Cortex hyaline, indistinct, gelatinous, inspersed with small crystals, 40–55 µm thick laterally and 55–120 µm thick basally. Amphithecium with small crystals that dissolve readily in KOH (allophana-type). Parathecium hyaline, 10–12 µm thick, with numerous small crystals soluble in KOH. Epihymenium reddish brown, c. 10–15 µm thick, K–, without crystals (glabrata-type), with small oil droplets. Hymenium hyaline, inspersed with small oil droplets, 55–80 µm thick. Hypothecium and subhymenium hyaline. Paraphyses c. 2 µm wide, sparingly branched apically; apices capitate, to c. 3.5 µm wide, reddish brown. Ascospores ellipsoidal, 12.5–17.5 × 6.5–9.5 µm. CHEMISTRY: Chemistry: Thallus and apothecial margin K+ yellow or K+ yellow → reddish, C+ faint orange to reddish, Pd+ yellowish orange; containing stictic acid (major), norstictic acid (submajor), atranorin (submajor), barbatic acid (submajor), 2,5,7-trichloro-3-O-methylnor-lichexanthone (submajor), chloroatranorin (minor), connorstictic acid (minor), constictic acid (minor), ±4-O-demethylbarbatic acid (minor), 5,7-dichloro-3-O-methylnorlichexanthone (minor), ±gyrophoric acid (minor), ±lecanoric acid (minor), ±3-O-methylasemone (minor), 2,5,7-trichlorolichexanthone (minor), ±ursolic acid (minor), ±methyl barbatate (trace), ±methyl-ß-orsellinate (trace), menegazziaic acid (trace) and cryptostictic acid (trace).
  Occurs in N.S.W., A.C.T., Vic. and Tas. Outside Australia it is known from montane regions of southern South America (Patagonia, Tierra del Fuego), the Subantarctic (Kerguelen Is., Macquarie Is.), and mountains in New Guinea and New Zealand.  
  Lumbsch & Elix (2004)  

Checklist Index
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References

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