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Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Dirinaria confluens (Fr.) D.D.Awasthi

Biblioth. Lichenol. 2: 28 (1975)

Parmelia confluens Fr., Syst. Orb. Veg. 1: 284 (1825).

T: ‘India Orientalis, ad cortices’ (lost); India, Neelgherries [Nilgiri Hills], Perrottet; neo: H-NYL 31808 n.v., fide D.D.Awasthi, loc. cit.; isoneo: BR, H-NYL 31809, M, PC, REN n.v.

  Thallus 3–10 cm wide, adnate to tightly adnate, pinnately to subpinnately lobate. Lobes radiating, contiguous, longitudinally plicate and rugose, plane to convex or occasionally concave towards the tips, 0.5–2.5 mm wide, distinctly flabellate at the apices, ±discrete to contiguous at the periphery. Upper surface white to grey, lead-grey, bluish grey or yellow-grey, usually finely white-pruinose, rarely epruinose; soredia and dactyls absent. Medulla mostly white; lower medulla occasionally orange, especially towards the lobe tips. Lower surface black in the centre, brown towards the periphery. Apothecia common, crowded centrally, sessile to constricted at the base, 0.5–2.0 mm wide; disc black, epruinose or weakly grey-pruinose. Epihymenium pale brown, c. 10 μm thick. Hymenium colourless to pale yellow, 80–110 μm thick. Hypothecium dark brown to brown-black, 100–250 μm thick, ±lentiform. Ascospores 16–24 × 7–10 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).
  This pantropical-subtropical species occurs on bark, wood and rocks in coastal and montane forest and woodland in W.A., N.T., Qld, and N.S.W. Also in Africa, Asia, North, Central and South America and the Pacific Islands.  
  Elix (2009l)  

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

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