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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
Pseudocyphellaria colensoi (C.Bab.) Vain.
  Résult. Voy. Belgica, Lich. 28 (1903); Sticta colensoi C.Bab., in J.D.Hooker, Fl. Nov. Zel. 2: 274 (1855). T: New Zealand, J.D.Hooker; lecto: BM, fide D.J.Galloway & P.W.James, Lichenologist 12: 294 (1980); syn: BM.  
  Thallus rosette-forming to irregularly spreading, loosely attached centrally, 8–20 (–30) cm wide. Lobes linear-elongate to broadly rounded, irregularly incised or notched, discrete at margins, imbricate centrally, 5–10 (–12) cm long, 10–25 (–30) mm wide; lobe margins crenulate, torn or ragged to deeply incised, often eroded yellow- or orange-red, pseudocyphellate below, sparsely to densely isidiate. Upper surface pale grey-green to tawny when dry, lettuce-green to blue-green when wet, pitted, wrinkled, shallowly to deeply faveolate, often cracked, matt or glossy to ±scabrid in parts, ±evenly isidiate. Isidia nodular at first, then granular-coralloid, often densely clustered, eroding yellow. Medulla yellow, often appearing patchily orange-red (e.g. at surface cracks). Photobiont green. Lower surface pale yellow at margins, darkening centrally, thinly tomentose. Pseudocyphellae conspicuous, yellow. Apothecia pedicellate, submarginal and laminal, 1–2 (–10) mm diam.; disc pale to dark red-brown, matt, epruinose; exciple isidiate; epithecium pale yellow-brown, K–; hypothecium colourless to pale straw-yellow or yellow-brown. Ascospores 1–3-septate, oval-ellipsoidal or broadly fusiform, 30–35 (–40) × 9–11 μm, colourless to pale yellow-brown. CHEMISTRY: Pulvinic acid, pulvinic dilactone, calycin, polyporic acid, 2α,3β,22α-triacetoxystictane, 22α-hydroxystictane-3-one, 2α,3β-diacetoxystictane-22-ol, stictane-3β,22α-diol, 2α-acetoxy-stictane-3β,22α-diol, 3β-acetoxystictane-2α,22α-diol and stictane-2α,3β,22α-triol.
  Occurs in eastern N.S.W., Vic. and Tas. at altitudes of 600–1300 m. Also common and widespread in New Zealand.  
  Galloway et al. (2001)  

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

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