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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 pruinosa (Gyeln.) Inumaru

Acta Phytotax. Geobot. 12: 11 (1943)

Peltigera polydactylon var. pruinosa Gyeln., Magyar. Bot. Lapok. 25: 253 (1926).

T: Siogama, Prov. Rikuzen, Honshu, Japan, “ad terram”; holo?: U.Faurie 6609 in Herb. Kyōto Imp. Univ. n.v.

  Thallus orbicular to irregularly spreading, 2–9 cm wide. Lobes sublinear, ±discrete at the apices, crowded centrally, 1.5–3.0 (–4.0) cm long, 4–15 mm wide; margins undulate and ±ascending, occasionally inrolled, entire or phyllidiate, often dissected by small tomentose brownish apothecial initials. Upper surface glabrous, olive-brown to red-brown when dry, ±minutely maculate towards the apices (×10 lens), matt or glossy, undulate, wrinkled, dimpled or ±bullate in parts, often irregularly longitudinally or laterally cracked, with small dark-tipped phyllidia occasionally regenerating from margins of cracks; pruina submarginal or laminal, as scattered crystals on the upper surface or forming conspicuous clusters. Lower surface tomentose, pale or whitish at the margins to buff centrally. Veins rather flattened to slightly raised, tomentose or not, 0.5–1.5 mm wide, pale buff to reddish brown at the margins, becoming medium to dark brown centrally, confluent at the margins; interstices oval to rounded or somewhat irregularly elongate, arachnoid, pale or whitish. Rhizines simple to fasciculate, or ±confluent and tufted (especially near apices), pale buff to dark brown or blackened, (2–) 5–7 mm long. Apothecia erect, round to saddle-shaped, 2–5 mm diam., or to 7 mm long, on ±involute marginal stalks; disc pale to dark red-brown; margin thin, crenate, pale buff. Ascospores acicular, 3–5 (–7)-septate, 50–65 × (2.0–) 2.5–4.0 µm, hyaline (few seen).
CHEMISTRY: Tenuiorin, methyl gyrophorate, dolicorrhizin (major or minor), zeorin (major or minor), ±peltidactylin (major or minor), ±traces of hopane-6α,7β,22–triol, hopane-7β,22–diol and hopane-15α,22–diol.
  Occurs in Qld, N.S.W., A.C.T., Vic. and Tas.; found in wet forest where it grows on earthbanks, sandbanks, soil, burnt or dead wood or on rock, on and among mosses, at altitudes to 1100 m. Also in China, Japan and Taiwan.  
  Louwhoff (2009b)  

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

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