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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
Xanthoparmelia congensis (Stein) Hale
  Phytologia 28: 486 (1974); Parmelia congensis Stein, Jahresber. Schles. Ges. Vartel. Cult. 66: 140 (1889). T: Vivi, Congo, Africa, Ledien 32; lecto: G, fide M.E.Hale, Smithsonian Contr. Bot. 74: 90 (1990). ***** Xanthoparmelia crateriformis Elix & J.Johnst., in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 221 (1986). T: 8 km north-east of Nerriga, N.S.W., 6 Oct. 1983, J.A.Elix 11582; holo: CANB.  
  Thallus subcrustose, very tightly adnate, ±rosette forming, to 3–5 cm wide. Lobes not imbricate, widely separate or rarely contiguous, sublinear, subdichotomously branched, 0.5–0.8 (–1) mm wide; apices markedly incised. Upper surface pale yellow-green, darkening to yellow-brown or black in thallus centre, flat to slightly concave, shiny at apices, dull and irregularly cracked near thallus centre, becoming crustose-areolate; isidia sparse, inflated-globose, simple; isidia apices epicorticate and becoming erumpent, barely sorediate, ultimately eroding leaving crater-like cavities. Medulla white. Lower surface flat, smooth, shiny, black, rarely partly dark-brown; rhizines sparse, simple, concolorous. Apothecia and pycnidia not seen. CHEMISTRY: cortex K-, UV-; medulla K+ yellow, C-, KC-, P+ orange; containing usnic acid, stictic acid (major), constictic acid, norstictic acid (minor), cryptostictic acid (trace) and ±menegazziaic acid (trace).
  Scattered on rock, mainly in coastal ranges of southern and northern Australia (W.A., N.T., S.A., Qld, N.S.W., A.C.T., Vic. and Tas. (Bass Strait)); also in South Africa and South America.  
  Elix (1994z)  

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

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