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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 subumbrina Müll.Arg.
  Bull. Herb. Boissier 3: 632 (1895). T: N.S.W., 1887, C.Knight 50; lecto: G, fide H.T.Lumbsch, J. Hattori Bot. Lab. 77: 142 (1994).  
  Thallus thin, plane, continuous or rimose-areolate to ±verruculose, yellowish white to whitish grey, epruinose, slightly glossy. Soredia absent. Prothallus not visible or whitish grey. Apothecia immersed when immature, becoming sessile, 0.2–0.7 (–1.0) mm diam.; disc pale brown to orange-brown, slightly whitish grey-pruinose; margin concolorous with the thallus, thin to thick, entire to verruculose. Cortex hyaline, inspersed with small crystals, gelatinous, 15–25 µm thick laterally and 20–30 µm thick basally. Amphithecium with large crystals insoluble in KOH (pulicaris-type). Parathecium hyaline, 10–15 µm thick, with numerous small crystals soluble in KOH. Epihymenium reddish brown, c. 15 µm thick, with crystals (chlarotera-type); pigmentation soluble in KOH. Hymenium hyaline, 60–85 µm thick. Hypothecium and subhymenium hyaline. Paraphyses sparingly branched and thickened apically. Ascospores narrowly ellipsoidal, 14.5–20.5 × 4.5–6.5 µm. CHEMISTRY: Thallus and apothecial margin K+ yellow, C+ orange, Pd+ pale orange; containing arthothelin (major), zeorin (major), chloroatranorin (major), atranorin (minor), thiophanic acid (minor), 2,4-dichloronorlichexanthone (trace) and 2,5-dichloronorliche-xanthone (trace).
  An endemic, corticolous species of various phorophytes, including Acacia, Alphitonia and Casuarina, in coastal areas of W.A., Qld and N.S.W.  
  Lumbsch & Elix (2004)  

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

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