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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 flaccidum (Ach.) Ach.
  Lichenogr. Universalis 647 (1810)
Lichen flaccidus Ach., Kongl. Vetensk. Acad. Nya Handl. 1795: 14 (1795). T: Östergötland, Sweden, Aug. 1909, Hulting; neotype of Lichen rupestris Sw. (on which L. flaccidus is based): UPS, fide G.Degelius op. cit. 142.
  Thallus to 3 cm wide, membranous, adnate, fragile, deeply lobate, matt or somewhat glossy, dark olive-green; isidia dense, often covering older parts of thallus, globose. Lobes rounded, sometimes imbricate; margin entire, sometimes isidiate. Apothecia scattered to crowded, to 0.8 mm wide, sessile, broadly adnate or base constricted; disc flat or convex, matt or glossy, pale to dark red, sometimes with white pruina; thalline exciple thin, entire, sometimes becoming crenulate, slightly prominent. Asci 65–85 × 15–20 µm. Ascospores 30–48 × 4.5–5 µm, broadly acicular to oblong, straight or slightly curved, ends obtuse or acute, 4–6-celled, not constricted. Pycnidia un­common, to 200 µm wide; pycnidial gel hyaline. Conidia 3–4 × 1 µm, straight, slightly swollen towards ends.
  A widely distributed lichen; in Australia recorded for N.S.W., A.C.T., Vic. and Tas.  
  Filson (1992d)  

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

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