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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 sekikaica Elix
     
 

Australas. Lichenol. 62: 36 (2008)

T: Stuarts Pt, Old Macleay River estuary, N.S.W., 30°49’S, 153º00’E, alt. 1 m, on Casuarina glauca in strand vegetation adjacent to mangrove swamp, 18 Jan. 1987, J.A.Elix 21346; holo: CANB.

 
     
  Thallus 5–10 cm wide, adnate to tightly adnate, pinnately to subpinnately lobate. Lobes radiating, contiguous, longitudinally plicate and rugose, plane to convex, ±concave and distinctly flabellate towards the tips, 0.5–2.0 mm wide. Upper surface grey, bluish grey to yellow-grey or off-white, ±pruinose, sorediate; dactyls absent. Soralia laminal, hemispherical or becoming elongate, occasionally erose and crateriform; soredia farinose. Medulla white, rarely the lower medulla orange towards the apices. Lower surface black in the centre, ±brown at the margins. Apothecia rare, sessile to ±constricted at the base, 0.5–1.5 mm wide; disc black, rarely sparsely grey-pruinose. Epihymenium dark yellow-brown, c. 10 μm thick. Hymenium colourless, 75–85 μm thick. Hypothecium dark brown to brown-black, 160–200 μm thick. Ascospores 15–22 × 6–8 μm. Conidia bacilliform, 3.5–5 × 0.8–1.0 μm.
CHEMISTRY: Cortex K+ yellow, C–, KC–, P+ yellow; medulla K–, C–, KC–, P–; containing atranorin (minor), chloroatranorin (minor), sekikaic acid (major), 4’-O-demethylsekikaic acid (minor), 3β-acetoxyhopane-1β,22-diol (minor),±unknown terpenes (minor).
     
  Occurs on bark, wood and rocks in coastal and montane forest in south-eastern Qld and eastern N.S.W. Also in Africa.  
     
   
     
     
  Elix (2009l)  

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