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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
Degeliella versicolor (Hook.f. & Taylor) P.M.Jørg.
  Biblioth. Lichenol. 88: 236 (2004)
Lecanora versicolor Hook.f. & Taylor, Lond. J. Bot. 3: 642 (1844); Psoroma versicolor (Hook.f. & Taylor) Müll. Arg., Flora 71: 534 (1888); Psoromidium versicolor (Hook.f. & Taylor) D.J.Galloway, New Zealand J. Bot. 21: 196 (1983). T: Lord Aucklands Group, N.Z., J.D.Hooker 1572; lecto: BM, fide D.J.Galloway loc. cit.; isolecto: G.
  Thallus minutely squamulose, in irregular patches, usually 1–2 cm wide. Squamules ±rosette-forming, closely attached, shallowly convex and ±complex-imbricate centrally, flat at margins, 0.1–0.3 mm wide, matt or shining, discrete and scattered on a thinly scurfy black prothallus, apple green when wet, pale green, to olivaceous when dry; margins paler, entire to minutely lobulate. Cephalodia common, sessile, 0.5–2 mm wide, flattened or convex, plicate-radiate, raised above squamules centrally, or scattered on prothallus at margins, dark grey-blue with prominent whitish, radiating striations when wet, pale grey or bluish yellow when dry. Apothecia scattered, ±discrete, 0.1–2.5 mm wide, sessile; disc concave to flat or convex, matt, red-brown; exciple prominent, consistently paler than disc when dry, entire or crenulate, persistent, occasionally white-silky below. Hymenium I-. Ascospores simple, 10–12 × 6–9 µm, distinctly warted, hyaline.
  Occurs mainly on bark of understorey shrubs in cool, humid forest in Tas. Also in southern South America, Macquarie Is. and the Auckland Is.  
  Jørgensen & Galloway (1992a)  

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

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