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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
Relicina clarkensis Elix & J.Johnst.
  Lichenologist 22: 269 (1990)
T: south of Proserpine, Clarke Range, Qld, 29 June 1986, J.A.Elix 20932 & H.Streimann; holo: CANB.
  Thallus foliose,adnate, to 3 cm wide. Lobes contiguous centrally to separate at periphery, ±imbricate, sublinear-elongate, dichotomously branched, 0.5–1 (–1.5) mm wide, elobulate; cilia moderately dense, tapering to markedly inflated basally, simple, to 0.4 mm long, black. Upper surface pale green to yellow-green, flat to convex, weakly maculate, lacking isidia; older lobes extensively cracked; lobe apices shiny. Lower surface pale brown; rhizines dense, elongate, simple or rarely sparsely furcate-branched, black. Apothecia common, 0.8–2 mm wide; disc shallowly concave then ±flat or slightly convex, dark brown; thalline exciple thin, persistent, weakly dentate, ecoronate, retrorsely rhizinate. Ascospores ellipsoidal, 5–8 × 3–4.5 µm. Pycnidia immersed, punctiform, minute, to 0.05 mm wide. Conidia bifusiform, 5.5–6.5 × 0.7–0.8 µm. CHEMISTRY: cortex K-, UV-; medulla K+ yellow, C-, P+ orange; containing usnic acid, stictic acid (major), menegazziaic acid (major/submajor), norstictic acid (minor), hypostictic acid (trace), constictic acid (trace), cryptostictic acid (trace), atranorin (trace) and ursolic acid (trace).
  This rare species is currently only known from the type locality in central coastal Qld (Proserpine district). Grows on rock.  
  Elix (1994v)  

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

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