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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
Lepraria aurescens Orange & Wolseley

Lichenologist 37: 247 (2005)

T: transect Wat Palad, Doi Suthep, Chiang Mai Province, Thailand, 18°48’N, 99°56’E, alt. 680 m, on bark in dry evergreen forest, 25 Nov. 1991, P.A.Wolseley & B.Aguirre-Hudson 5001; holo: BM.

  Thallus crustose, leprose, powdery, pale grey to pale yellowish grey, diffuse, forming a thin ±continuous finely granular crust to 5 cm wide. Margin diffuse or very small areas ±delimited, but without lobes or a raised rim. Soredia predominantly coarse, dispersed or forming a thick continuous layer, ±globose, 40–100 μm wide; mostly without distinctly projecting hyphae, but marginal granules and those in small groups with long mostly downward projecting hyphae to c. 150 (–300) μm long. Medulla absent. Hyphae 2.5–4.0 μm thick. Lower surface with a brown hypothallus (tomentum).Photobiont cells ±spherical, 6–15 μm diam. Hypothallus brown, often extending slightly beyond the thallus margin.
CHEMISTRY:Thallus K+ bright yellow, C–, KC–, P+ yellow-orange; UV–; containing thamnolic acid (major).
  Occurs in monsoon forest in northern N.T. and in north-eastern Qld; grows on bark and charred wood. Also in Thailand.  
  Elix (2009i)  

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

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