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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
Polyblastia cruenta (Körb.) P.James & Swinsc.
  in T.D.V.Swinscow, Lichenologist 5: 110 (1971). T: Aupagrund, near Petzkretscham, [Czech Republic], 1848, coll. unknown; holo: L (Körber Stammherbar 910, 213–1364), n.v.  
  Thallus epilithic, smooth, continuous to sparingly rimose, diffuse to determinate, thin, filmy, medium to dark grey-brown to greenish black, 30–60 µm thick, becoming ±gelatinous when wet; prothallus not apparent. Perithecia superficial, hemispherical to subglobose, 0.46–0.92 mm diam., usually covered by a thin thalline layer; apex ±rounded. Involucrellum with a black outer layer, hyaline to pale greenish brown within. Exciple 20–30 µm thick, pale to dark brown. Centrum 0.3–0.6 mm wide. Periphyses 40–90 × c. 2 µm. Asci 8-spored, 170–220 × 75–90 µm. Ascospores muriform, ellipsoidal, 52–81 × 31–42 µm, colourless at first, becoming brown. .
  Occurs in Tas., on inundated dolerite boulders and bedrock in creeks and rivers. Also in Arctic Eurasia, central and western Europe, North America and New Zealand.  
  McCarthy (2001e)  

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

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