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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
Leptogium austroamericanum (Malme) C.W.Dodge
  Herzogia 2: 466 (1973)
Leptogium cyanescens var. austroamericanum Malme, Ark. Bot. 19(8): 21 (1924). T: Santo Angelo, Rio do Sul, Brazil, G.O.A.Malme 950, holo: S.
  Thallus foliose, ±loosely adnate or subpulvinate, 2–10 cm wide, 80–200 µm thick, leaden grey or browned. Lobes rotund, ±ascending, concave or undulate, rarely plicate, 3–8 mm wide; margins entire or lobulate, ±isidiate. Upper surface matt, wrinkled, isidiate, ±lobulate; wrinkles prominent, anastomosing; isidia cylindrical to clavate, rarely squamuliform. Lower surface naked or with sparse scattered rhizine tufts. Apothecia rare, laminal, sessile, 1–2 mm wide; disc concave to flat, ±reddish brown; thalline exciple ±periclinally wrinkled, ±isidiate, leaden grey or cream. Ascospores 8 per ascus, ellipsoidal, ±muriform, 20–30 × 8–13 µm; apices acute. Pycnidia submarginal. Conidia 3–4 µm long; apices not swollen.
  Grows on tree trunks in montane or coastal rainforest, in roadside plantings or forest remnants and in mangrove communities; also rarely found on rocks. It is distributed from north-eastern Qld to north-eastern N.S.W. A single atypical specimen has been collected in the N.T. A characteristic South American species, also recorded from Central America and southern U.S.A.  
  Verdon (1992b)  

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

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