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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
Collema rugosum Kremp.
  in Fenzl, Reise Novara 2: 128 (1870)
T: Tahiti, 1857–59 Jelenik 77; lecto: W, n.v., fide G.Degelius, Symb. Bot. Upsal. 20(2): 150 (1974).
  Thallus to 6 cm wide, rounded, foliose, adnate, membranous, sometimes radiating, slightly to densely ridged, matt, sometimes slightly glossy, pale to dark olive-green, rarely bluish green; isidia numerous in centre, globose becoming cylindrical, simple or sparsely branched. Lobes few, elongate to rounded, imbricate, to 2 cm wide. Apothecia sparse to numerous, to 1.5 mm wide, sessile with constricted base; disc flat to slightly concave, matt, epruinose, red; thalline exciple thin, entire, smooth or finely rugose, often densely isidiate, not prominent, persistent. Asci 70–90 × 13–20 µm. Ascospores 40–75 × 4–6.5 µm, acicular to fusiform, straight or slightly curved, 4–8-celled, one or both end-cells often longer, not constricted. Pycnidia numerous, to 175 µm wide, laminal to submarginal; pycnidial gel hyaline to pale yellow. Conidia 4.5 × 1–1.5 µm, straight, sometimes slightly swollen at ends.
  Rarely found outside the tropics. In Australia it has been found in N.T., Qld and N.S.W.  
  Filson (1992d)  

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

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