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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
Degelia gayana (Mont.) Arv. & D.J.Galloway
  Lichenologist 13: 44 (1981)
Parmelia gayana Mont., Ann. Sci. Nat. Bot. 3: 58 (1849). T: Prov. Coquimbo, Chile, 1839, C.Gay; lecto: PC, fide L.Arvidsson & D.J.Galloway, loc. cit.; isolecto: BM, H-NYL.
  Thallus ±placodioid, ±orbicular, loosely attached, to 6 cm wide, whitish grey-blue. Lobes 0.3–0.8 cm wide, adjacent, broadly cuneate to flabellate, very often with shallow transverse concentric ridges; margins entire to minutely notched, ±conspicuously deflexed. Upper surface ±smooth, somewhat coriaceous, matt. Lower surface pale, corticate, with numerous white or more rarely blue-black rhizohyphae. Apothecia frequent, to 1.5 mm wide; disc concave at first becoming flat or convex, usually pale reddish brown with prominent paler proper exciple; hymenium I+ blue. Ascospores 11–16 × 5–7 µm.
  Occurs in N.S.W., Vic. and Tas. on bark, primarily an epiphyte of twigs and small branches; an occasional species of cool humid lowland habitats in moderate to deep shade. Also in New Zealand, South America and Tristan da Cunha.  
  Jørgensen & Galloway (1992a)  

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

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