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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
Chrysothrix granulosa G.Thor

Bryologist 91: 361 (1988)

T: Copiapó, Atacama Province, Chile, 13 July 1940, R.Santesson 2701; holo: S n.v.; iso: BM, UPS n.v.

  Thallus crustose, lemon-yellow, usually distinctly stratified, adnate, composed of rounded and convex sometimes placodioid cushions 5–20 mm wide; these can become confluent in part, more rarely forming diffuse scattered granules. Soredia fine, with individual granules convex to spherical, 20–65 μm wide. Medulla distinct, ±byssoid, yellow in the upper part, pale yellow to almost white below. Photobiont cells ±globose, 8–20 μm wide, solitary or a few cells aggregated. Apothecia not seen in Australian specimens [Reported to be rare, 0.2–1.0 mm wide, rounded, with a constricted base; disc brownish orange, yellow-pruinose, plane to convex; true exciple poorly developed; hymenium colourless or pale yellow, 60–70 μm thick; epihymenium yellow, forming a distinct layer of richly branched paraphyses; hypothecium colourless, fusing into the medulla, hard and opaque; ascospores 3-septate, obovate, straight, 11–15 × 3 μm (Thor, 1988)].
CHEMISTRY: Thallus K+ orange, C–, KC–, P+ orange, UV+ dull orange; containing diffractaic acid, calycin.
  Known from W.A. and Tas.; occurs in dry, sheltered overhangs, on rock, wood or bark. Also in North and South America and New Zealand.  
  Elix (2009d)  

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

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