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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 osseoalba (Vain.) Y.S.Park & Hale
     
 

Taxon 38: 88 (1989); Parmelia osseoalba Vain., Ann. Soc. Zool. Bot. Fenn. Vanamo 1: 39 (1921). T: summit of Mt Doi Sutep, Thailand, C.C.Hosseus s.n.; holo: TUR–V, n.v., fide Y.S.Park & M.E.Hale, loc. cit. Parmelia formosana Zahlbr., Repert Spec. Nov. Regni Veg. 33: 57 (1934); Hypotrachyna formosana (Zahlbr.) Hale, Smithsonian Contr. Bot. 25: 38 (1975). T: Mt Arisan, Nimandaira, Taiwan, Y.Asahina 70; lecto: W; isolecto: TNS, fide M.E.Hale, loc. cit.

 
     
  Thallus adnate to tightly adnate, to 3–8 cm wide. Lobes crowded, sublinear, subdichotomously branched, 1–3 mm wide; margins entire; apices incised. Upper surface pale yellowish grey, flat or weakly convex, shiny, emaculate, smooth, becoming cracked centrally, without isidia; soredia in coarse, erumpent, laminal pustules or coralloid clusters, appearing glomerulate and almost isidiate. Medulla white. Lower surface densely rhizinate; rhizines dichotomously branched. Apothecia rare, sessile, 3–5 mm wide; thalline exciple crenate, occasionally sorediate or pustulate. Ascospores 7–11 × 4–6 µm. Pycnidia not seen. CHEMISTRY: cortex K-, UV+ yellow; medulla K+ reddish, C-, P-; containing lichexanthone (major), colensoic acid, 4-O-methylphysodic acid, lividic acid (major), physodic acid and oxyphysodic acid.
     
  Common in moister areas of eastern Australia (Qld, N.S.W. and Vic.); a common cosmopolitan subtropical to temperate species, probably the most common Hypotrachyna in Australia. 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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