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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
Strigula prasina Müll.Arg.

Flora 68: 343 (1885)

Raciborskiella prasina (Müll.Arg.) R.Sant., Symb. Bot. Upsal. 12(1): 197 (1952).

T: Apiahí, São Paulo, Brazil, J.I.Puiggari 385b; lecto: G n.v., fide R.Santesson, loc. cit.

  Thallus usually hypophyllous, occasionally epiphyllous, subcuticular, rounded to irregular, 5–20 mm wide, 20–40 µm thick, pale greenish grey, becoming dull pale bluish grey, smooth to radially furrowed; margin crenulate to shallowly lobate; photobiont Cephaleuros; prothallus not apparent. Perithecia almost superficial, convex to hemispherical, 0.25–0.45 (–0.50) mm diam., not overgrown by the thallus, glossy black, the base sometimes spreading laterally. Perithecial apex rounded; ostiole inconspicuous or in a shallow depression. Involucrellum black, carbonaceous, extending to exciple base level, 20–30 µm thick. Exciple hyaline to pale brown, 8–15 µm thick. Centrum depressed-ovate, 0.15–0.25 mm diam. Paraphyses richly branched and anastomosing, especially near their apices. Asci elongate-cylindrical, 60–80 × 7–9 µm. Ascospores uniseriate or irregularly biseriate in the ascus, 1-septate, elongate-ellipsoidal to short-fusiform, scarcely constricted at the septum, 12–18 × 4–6 µm; cells not separating. Conidiomata: 1) hemispherical, black, 0.08–0.15 mm diam., containing simple bacilliform macroconidia 10–15 × 3–4 µm; 2) convex, black and very numerous, 0.05–0.08 mm diam., containing simple fusiform microconidia 4–5 × 1–2 µm.
  Occurs on the leaves of rainforest trees in north-eastern Qld; pantropical.  

Photo: R. Lücking

  McCarthy (2009b)  

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

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