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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
Hypotrachyna costaricensis (Nyl.) Hale
  Smithsonian Contr. Bot. 25: 29 (1975); Parmelia costaricensis Nyl. in H.Polakowski, J. Bot. 13: 225 (1877). T: Angostura, Costa Rica, Nov. 1875, H.Polakowski; lecto: H, fide M.E.Hale, loc. cit.  
  Thallus loosely adnate to adnate, to 5–10 cm wide. Lobes often imbricate, sublinear to irregular, subirregularly branched, 2–6 mm wide; margins entire. Upper surface whitish to greenish grey, flat to slightly convex, dull, usually strongly maculate, without soredia and pustules; isidia cylindrical, erect, simple to branched. Medulla white. Lower surface moderately to densely rhizinate; rhizines shiny, richly dichotomously branched, often forming a thick mat visible along margins from above. Apothecia rare, sessile, 2–7 mm wide. Ascospores 8–10 × 4–6 µm. Pycnidia not seen. CHEMISTRY: cortex K+ yellow, UV-; medulla K-, C-, KC-, P-; containing atranorin, chloroatranorin, protolichesterinic acid (major) and unidentified fatty acids (major/minor).
  Rare in eastern Qld; also known from Papua New Guinea, SE Asia, Central and South America. Grows on bark and rock.  
  Elix (1994h)  

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

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