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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
Hypotrachyna immaculata (Kurok.) Hale
  Smithsonian Contr. Bot. 25: 41 (1975); Parmelia immaculata Kurok. in M.E.Hale & S.Kurokawa, Contr. U.S. Natl Herb. 36: 178 (1964). T: Zoutpausberg, South Africa, 11 Oct. 1953, O.Almborn 6551; holo: LD; iso: US.  
  Thallus loosely adnate to adnate, rather fragile, to 5–7 cm wide. Lobes contiguous, sublinear, subdichotomously branched, 1.5–3 mm wide; margins entire; apices incised. Upper surface whitish grey, flat, shiny, emaculate, smooth, without pustules or isidia; soralia subterminal, large and capitate, 1–2 mm wide, often ochraceous below. Medulla mostly white, orange-brown below soralia. Lower surface densely rhizinate; rhizines densely dichotomously branched. Apothecia rare, sessile, 2–3 mm wide; thalline exciple sorediate. Ascospores 10–14 × 4–7 µm. Pycnidia not seen. CHEMISTRY: cortex K+ yellow, UV-; medulla K- or K+ pale reddish, C-, KC+ rose, P-, UV-; containing atranorin, chloroatranorin, colensoic acid (major or minor), 4-O-methylphysodic acid (major or minor), lividic acid (minor or major), physodic acid (minor) and oxyphysodic acid (minor).
  Common in moist habitats in eastern Australia (Qld, N.S.W., A.C.T., Vic. and Tas.); a temperate–tropical species also known from South America and Africa. Grows on bark and rock.  
  Elix (1994h)  

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

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