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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
Psoroma hypnorum (M.Vahl) S.F.Gray var. hypnorum
  Nat. Arr. Brit. Pl. 1: 445 (1821)
Lichen hypnorum M.Vahl, Fl. Dan. 6, fasc. 16: 8 (1787). T: Norway, undated, M.Vahl; neo: C, fide P.M.Jørgensen, Opera Bot. 45: 26 (1978).
  Thallus squamulose. Squamules 0.2–0.5 mm wide, sometimes almost granular, spreading irregularly over substratum, resting on a thin, indistinct, pale prothallus, ochre-brown more rarely grey, greenish when wet. Cephalodia often present, usually similar to squamules but darker, scattered among squamules or on outer surface of apothecia. Apothecia frequent, 1–3 (–5) mm wide; disc concave to flat or undulate, smooth, matt, epruinose, brown or red-brown; margins ±squamulose or entire, lower part glabrous. Ascospores ellipsoidal, 19–28 × 8–10 µm; episporium warted, 2–3 µm thick.
  Occurs in N.S.W., Tas. and Macquarie Is. On soil, decomposing vegetation, dead twigs in litter, in sheltered cracks on dolerite boulders and below small bushes in subalpine to alpine habitats, 650–2000 m. Cosmopolitan in alpine grasslands and rocky alpine grasslands.  
  Jørgensen & Galloway (1992a)  

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

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