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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
Punctelia subrudecta (Nyl.) Krog
  Nordic J. Bot. 2: 291 (1982)
Parmelia subrudecta Nyl., Flora 69: 320 (1886). T: Îsle St Paul, [Indian Ocean], L.Jelinek; holo: H-NYL.
  Thallus loosely adnate to adnate, to 5–15 cm wide. Lobes crowded, dissected, 5–10 mm wide; margins sinuous, becoming sorediate, darkening. Upper surface grey to greenish grey or greenish blue, conspicuously rugose, matt, shiny at thallus margins which are often suffused-brownish, becoming copiously sorediate, without isidia; pseudocyphellae laminal, scattered, punctiform, becoming sorediate; soralia irregular; soredia coarse, granular, often coralloid, off-white to greenish brown or blackish, sometimes becoming partly corticate and developing into pseudoisidia. Lower surface smooth or rugose, shiny, pale yellowish buff or buff-brown or whitish; rhizines sparse, simple, pale buff. Apothecia rare, subpedicellate, 2–4 mm wide; disc imperforate, deeply concave; thalline exciple inrolled at first, pseudocyphellate, sorediose. Ascospores ellipsoidal, 16–18 × 9–15 µm. Pycnidia common. Conidia unciform, 5–7 × 1 µm. CHEMISTRY: cortex K+ yellow; medulla K-, C+ red, KC+ red, P-; containing lecanoric acid (major), ±atranorin and ±chloroatranorin.
  Widely distributed throughout Australasia and common in urban areas on introduced trees in parks and gardens, as well as on fenceposts, trees, and rock in country areas. Very common in southern Australia. A cosmopolitan species.  
  Elix (1994u)  

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

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