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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
Herpothallon confluenticum Aptroot & Lücking

in A.Aptroot, G.Thor, R.Lücking, J.A.Elix & J.L.Chaves, Biblioth. Lichenol. 99: 35 (2008)

T: Doi Suthep, Chiang Mai, Thailand, medicinal herb garden, Oct. 2002, A.Aptroot 55269; holo: ABL; iso: CMU.

  Thallus loosely appressed to the substratum, rather firm, not flaking off, to 7 cm wide, dull, minutely felty, pale grey to green, to 300 µm thick, lacking calcium oxalate crystals; hyphae 1–2 µm wide. Hypothallus below the entire thallus, byssoid, whitish to brownish; hyphae 1–2 µm wide. Prothallus to 2 mm wide, byssoid, composed of interwoven and radia­ting hyphae, dirty whitish. Pseudoisidia numerous, cylindrical, partly cauliflower-like branched at the tips, arising perpendicularly but often slanted, concolorous with the thallus, but the tips often dark grey, felty with projecting hyphae, to 0.6 mm long and 0.2 mm wide. Photobiont cells solitary or in short irregular filaments, 6–14 ´ 5–10 µm. Asci rare, 70–100 × 45–65 µm (in a Nepalese collection). Ascospores not seen. Pycnidia often present in the tips of isidia. Conidia not seen.
CHEMISTRY: Thallus and prothallus C–, K–, P+ yellow, UV–, I–, K/I–; containing confluentic acid.
  Very rare on bark in north-eastern Qld; also in Venezuela, Nepal and Thailand.  
  Elix (2009c)  

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

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