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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
Dirinaria complicata D.D.Awasthi

Biblioth. Lichenol. 2: 51 (1975)

T: 6 miles [c. 10 km] S of Ngong Hills, Kenya, on bark of Acacia in grove alongside watercourse, 29 Jan. 1953, C.F.Hemming 219; holo: EA n.v.

  Thallus 4–10 cm wide, loosely adnate, pinnately to subpinnately lobate. Lobes radiating, contiguous, longitudinally plicate and rugose, ultimately convoluted to folded and plicate-complicate, plane to convex, 1–5 mm wide, distinctly flabellate at the apices, ±discrete to contiguous at the periphery. Upper surface white to pale grey or pale greenish grey, finely pruinose; soredia and dactyls absent. Medulla white. Lower surface white to pale yellow or pale brown. Apothecia common, crowded centrally, innate, then sessile and ±constricted at base, 0.5–2.0 mm wide; disc black, epruinose. Epihymenium pale brown, c. 10 μm thick. Hymenium colourless, 90–110 μm thick. Hypothecium dark brown to brown-black, 180–200 μm thick, lentiform. Ascospores 12–22 × 6–10 μm. Pycnidia not seen.
CHEMISTRY: Cortex K+ yellow, C–, KC–, P+ yellow; medulla K–, C–, KC–, P–; containing atranorin (minor), chloroatranorin (minor), divaricatic acid (major), 3β-acetoxyhopane-1β,22-diol (minor),±unknown terpenes (minor).
  Occurs on rock and bark in Eucalyptus woodland in central Qld. Also in East Africa and Madagascar.  
  Elix (2009l)  

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

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