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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 subcoronata Elix & J.Johnst.
  Lichenologist 22: 273 (1990)
Parmelia abstrusa Vain., Acta Soc. Fauna Fl. Fenn. 7: 64 (1890). T: Caraça, Minas Gerais, Brazil, E.A.Vainio 1347; lecto: TUR, isolecto: UPS, fide M.E.Hale, Smithsonian Contr. Bot. 26: 17 (1975).
  Thallus foliose, tightly adnate, to 5 cm wide. Lobes contiguous, scarcely imbricate, linear-elongate, subdichotomously branched, 1–3 mm wide, lacking lobules; cilia sparse to moderately dense, inflated at base, short (to 0.3 mm long). Upper surface yellow-green to yellow-brown, flat to weakly convex, shiny at lobe apices, smooth but becoming cracked, weakly maculate, without isidia. Lower surface brown to dark brown; rhizines dense, simple or occasionally dichotomously branched, brown to black. Apothecia common, 1–3 mm wide; disc ±flat or shallowly concave, cinnamon-brown; thalline exciple subcoronate, ±retrorsely rhizinate. Ascospores ellipsoidal, 7–9 × 3.5–4.5 µm. Pycnidia common, punctiform, flat to slightly emergent, to 0.05 mm wide. Conidia bifusiform, 6–8 × 1 µm. CHEMISTRY: cortex K-, UV-; medulla K+ yellow, C-, P+ orange; containing usnic acid, stictic acid (major), norstictic acid (minor), constictic acid (minor), cryptostictic acid (trace), hypostictic acid (trace) and atranorin (trace).
  Very rare, endemic; known only from the type locality in the north Qld hinterland. Grows on bark.  
  Elix (1994v)  

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

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