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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
Nephroma helveticum Ach.

Lichenogr. Universalis 523 (1810)

T: “In montibus Helvetiae” [Switzerland], Schleicher; lecto: H-ACH 1470B (717) n.v., fide O.Almborn, in P.W.James & F.J.White, Lichenologist 19: 238 (1987).

Nephromium tropicum Müll.Arg., Flora 66: 21 (1883); — Nephroma tropicum (Müll.Arg.) Zahlbr., Cat. Lich. Univ. 3: 442 (1925). T: Sandwich Islands [Hawaiian Islands], H.Mann; lecto: G n.v., fide C.Wetmore, Publ. Mus., Michigan State Univ., Biol. Ser. 1(11): 422 (1960); isolecto: FH n.v; syn.: Toowoomba, Qld, coll. unknown (MEL).

  Thallus orbicular to irregularly spreading, 1–5 (–8) cm wide, thin and ±crumbling when dry, small-lobate. Lobes variable, loosely attached and flat initially; fertile lobes imbricate and growing outwards, reflexed at apices to expose the apothecia, c. 5 mm wide. Upper surface brown, greyish brown or pale grey, wrinkled, matt or glossy, ±faveolate and often ±maculate (×10 lens), with varying amounts of pubescence, especially on the dorsal side of apothecia; margins indented, broadly lobulate or denticulate, phyllidiate. Phyllidia terete to ±flattened, to 1 mm wide, mostly marginal, occasionally spreading laminally. Photobiont Nostoc. Lower surface dark brown to black, tomentose or densely pubescent, rarely partly glabrous. Apothecia common, to 8 mm diam., rounded to reniform, with a thin dentate thalline margin; dorsal surface scabrid; disc reddish brown, matt or glossy. Ascospores 3-septate, 15.0–22.7 × 6.0–7.5 μm, pale reddish brown. Pycnidia not seen.
CHEMISTRY: Hopane-7α, 22-diol (major), ±7β-acetoxyhopan-22-ol (minor or trace), ±O-methyl-leprolomin (minor or trace), ±iso-O-methylleprolomin (minor or trace), ±methyl gyrophorate (trace).
  This cosmopolitan species is uncommon on bark and rock in south-eastern Qld and north-eastern N.S.W.; grows in eucalypt forest and rainforest. Earlier records from the A.C.T. and Vic. were misidentifications of N. rufum.  
  Louwhoff (2009a)  

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

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