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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 melanoclina (C.Knight) D.D.Awasthi

Biblioth. Lichenol. 2: 77 (1975)

Physcia melanoclina C.Knight, Trans. Linn. Soc. London, Bot. 2: 49 (1882).

T: [near Sydney], N.S.W., 1880, C.Knight 13; lecto: WELT, fide D.D.Awasthi, loc. cit.; isolecto: H-NYL 31807, M n.v.

  Thallus 2–5 cm wide, adnate, pinnately to subpinnately lobate. Lobes radiating, contiguous, longitudinally weakly plicate, plane to convex to weakly concave, 0.5–1.0 mm wide; apices rounded, discrete. Upper surface grey, greenish grey to yellow-grey or off-white, epruinose, sorediate; dactyls absent. Soralia laminal, capitate, 0.5–1.0 mm wide; soredia farinose. Medulla white. Lower surface brown-black. Apothecia rare, sessile to ±constricted at the base, 0.6–1.0 mm wide; disc red-brown to brown-black, purple-pruinose. Epihymenium dark brown, 10–15 μm thick. Hymenium colourless, 65–75 μm thick. Hypothecium dark brown-black, 140–160 μm thick. Ascospores 16–20 × 6–9 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 bark in coastal and hinterland forests in south-eastern Qld and eastern N.S.W. Also in South Africa.  
  Elix (2009l)  

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

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