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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
Psoroma pholidotoides (Nyl.) Trevis.
  Lichenoth. Veneta 98 (1869)
Lecanora sphinctrina var. pholidotoides Nyl., J. Linn. Soc., Bot. 9: 250 (1866). T: Saddle Hill Bush, Otago, N.Z., 26 Oct. 1861, W.L.Lindsay; lecto: H-NYL 30773, fide D.J.Galloway, Fl. New Zealand Lichens: 480 (1985).
  Thallus squamulose, closely attached, irregularly spreading 4–10 cm wide. Squamules minute, scattered at margins, 0.5–1 mm wide, round to irregular, coalescing centrally into a ±dense, flat, appressed mosaic, often microphylline or sublobulate, often diffract-areolate centrally, ±continuous, convex, flat or concave, jigsaw-like. Prothallus cottony, thick and fibrous or thin, to 5 mm beyond marginal squamules, black. Upper surface pale greenish or yellow-green; margins ±shining, waxy, smooth, without indumentum or crystals. Cephalodia infrequent, occasionally larger than squamules, flattened, to 1 mm wide, placodioid, shallowly wrinkled-plicate, smooth, shining, pale bluish grey when wet, or in small, flattened globules to0.1 mm wide, occasionally laminal, normally marginal or between squamules, sometimes striate, purplish to brown. Apothecia sessile, round to irregular, 0.5–2.5 mm wide; disc convex to flat, sometimes contorted, etched or confluent-convolute with thalline lobules, matt, epruinose, red-brown; thalline exciple areolate below disc, relatively thick, inflexed, crenate-striate at margin of disc. Ascospores 13–22 × 9–11 µm. CHEMISTRY: vicanicin ±pannarin, ±leprolomin, ±usnic acid.
  On a variety of trees and shrubs, usually on smoothish bark on lower trunks, in wet sclerophyll forest and in young mixed forest, often at edges of forest in habitats with high light intensities; 140–1000 m. From N.S.W., Vic. and Tas. Also in New Zealand and South America.  
  Jørgensen & Galloway (1992a)  

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

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