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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 soccatum R.Br. ex Crombie
  J. Linn. Soc., Bot. 17: 398 (1879)
T: Table Mtn [Mt Wellington], Tas., R.Brown Iter Australiense 502; lecto: BM, fide D.J.Galloway, Fl. New Zealand Lichens 481 (1985).
  Thallus small-squamulose, often widely scattered, on a prominent black, thin, continuous, fibrous or byssoid prothallus, 3–5 (–10) cm wide. Squamules ±discrete, 0.1–1 mm wide, round to irregular, flat to subconvex, rarely a continuous crust, ±consistently sorediate, especially at centre, esorediate near margins, sometimes forming a diffract-areolate, sorediate crust centrally, white-tomentose below. Upper surface smooth, waxy or matt, commonly with fine, silky, bristling crystals (x10 lens), pale greenish or yellowish white. Cephalodia common, scattered, between squamules, simple, globose to glomerulate, smooth, purplish brown. Apothecia uncommon, scattered, sessile or subpedicellate, 0.1–1.2 mm wide, round to irregular; disc matt, epruinose, not gyrose-etched, sometimes ±sorediate, dark red-brown to blackish; thalline exciple wrinkled-striate, ±sorediate below disc, crenulate-striate, waxy, occasionally granular-sorediate at margin of disc. Ascospores 15–17 × 11µm, CHEMISTRY: dechloropannarin and usnic acid.
  On bark of trees and shrubs in rainforest and subalpine heath woodland, 170–920 m in N.S.W. and Vic. and more commonly in 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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