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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 subconfluens D.D.Awasthi

Biblioth. Lichenol. 2: 33 (1975)

T: New Caledonia, on bark, 1863–64, E.Vieillard; holo: H n.v.; iso: H n.v.

  Thallus 3–20 cm wide, adnate to tightly adnate, pinnately to subdichotomously lobate. Lobes radiating, discrete to contiguous, not or very weakly plicate, plane to convex, 0.3–1.0 mm wide, discrete to contiguous at the periphery. Upper surface white to grey, greenish white or pale bluish grey, usually epruinose, rarely slightly white-pruinose; soredia and dactyls absent. Medulla mostly white; lower medulla rarely yellow-orange towards the lobe tips. Lower surface black. Apothecia common, crowded centrally, initially innate, then sessile or slightly constricted at the base, 0.5–1.5 mm wide; disc black, epruinose or weakly grey-pruinose. Epihymenium pale brown, c. 10 μm thick. Hymenium colourless to pale yellow, 60–75 μm thick. Hypothecium dark brown, 70–150 μm thick, lentiform. Ascospores 13–18 × 5–8 μm. Conidia bacilliform, 4–5 × 0.8–1.1 μm.
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 bark, wood and rocks in coastal and montane forests and woodland in the N.T. and Qld. Also in Asia, New Caledonia, Vanuatu, French Polynesia and the Hawaiian Islands.  
  Elix (2009l)  

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

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