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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
Peltigera rufescens (Weiss) Humb.

Fl. Friberg. 2 (1793)

Lichen caninus var. rufescens Weiss, Pl. Crypt. Fl. Goett. 79 (1770); — Lichen rufescens (Weiss) Neck., Meth. Musc. 80 (1771); — Peltigera canina β rufescens (Weiss) Willd., Fl. Berol. Prodr. 347 (1787); — Peltidea canina ε crispa Ach., Lichenogr. Universalis 519 (1810); — Peltidea ulorrhiza Flörke, Deutsche Lich. 8(11): No. 154 (1821); — Peltigera canina β phaeorrhiza Wallr., Fl. Crypt. Germ. 1: 558 (1831).

T: Flörke, Deutsche Lich. No. 154, “Peltidea ulorrhiza”; neo: B n.v., fide O.Vitikainen, Acta Bot. Fenn. 152: 77 (1994); isoneo: M, UPS n.v.

  Thallus orbicular to irregularly spreading, 2–8 (–10) cm wide. Lobes linear to rounded, 0.8–3.5 cm long, 5–15 (–20) mm wide, occasionally becoming complex-folded; margins undulate, frilled, strongly upturned, slightly thickened or not, often lobulate or phyllidiate, with or without small brownish tomentose apothecial initials. Upper surface dark grey-brown or reddish brown centrally, paler grey to ±grey-white at the margins and apices, thickly tomentose at or near margins, flattened-tomentose or glabrous centrally, mostly matt, smooth or undulate to ±bullate in parts, with or without irregular longitudinal or lateral cracks, ±minutely maculate towards the apices (×10 lens). Lower surface tomentose, pale or whitish at the margins, dark brown to blackening centrally. Veins rather flattened to slightly raised, 0.5–1.0 mm wide, pale buff to brown at the margins, darkening to brown-black centrally, anastomosing, with pale or whitish lenticular interstices. Rhizines simple at the margins, becoming tangled and confluent in a dense row along veins, ±concolorous with veins, 2–4 (–5) mm long. Apothecia on upright lobes, saddle-shaped, 3–5 mm long; disc dark red-brown to brown-black, epruinose, matt. Ascospores not seen; reported as colourless, elongate-fusiform, 5 (–7)-septate, (45–) 50–60 (–65) × 2.5–5.0 µm (Galloway, 2000) and (36–) 49–63 (–78) × 2.6–5.2 µm (Vitikainen, 1994)..
CHEMISTRY: No substances detected by TLC.
  Most common in Tas., also in Vic.; grows on soil in alpine heathland or over dolerite outcrops in open Eucalyptus woodland, at 800–1370 m altitude, also on and among mosses. This cosmopolitan lichen is known from North and South America, Europe, Asia, Africa, Antarctica and New Zealand.  
  Louwhoff (2009b)  

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

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