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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 cravenii Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 223 (1986). T: Rodgers Pass, 48 km west of Stuart Hwy along road to Kings Canyon, N.T., 11 Sept. 1983, J.A.Elix 11118 & L.A.Craven; holo: CANB.  
  Thallus foliose to subcrustose, very tightly adnate, to 3–8 cm wide. Lobes imbricate or not, flat, sublinear-elongate to subirregular, irregularly branched, 0.8–2 (–2.5) mm wide; apices ±rotund. Upper surface yellow-green, becoming dark greyish green, dull or shiny towards periphery, emaculate, becoming rugulose, often transversely cracked, lacking soredia and isidia; older lobes extensively fractured and areolae commonly formed; areolae c. 1 mm wide; lobe margins commonly black, particularly towards apices. Medulla white. Lower surface pale tan to light brown, often somewhat darker to smoke-grey near lobe apices; rhizines moderately dense to dense, simple, brown. Apothecia subpedicellate, 1–2 (–4) mm wide; disc concave, dark brown to black-brown; thalline exciple smooth, thick, entire. Ascospores 8.5–10.5 × 5–6 µm. Pycnidia rarely developed. Conidia bifusiform, 5–6 × 0.5 µm. CHEMISTRY: cortex K-, UV-; medulla K-, C-, KC-, P-; containing usnic acid, ±protoconstipatic acid, ±constipatic acid, scabrosin 4,4'-dibutyrate, scabrosin 4-acetate 4'-butyrate, scabrosin 4-acetate 4'-hexanoate, ±scabrosin 4,4'-diacetate (trace), with or without unidentified scabrosin derivatives and with or without unidentified fatty acids.
  Endemic, common, on rock faces with a southerly aspect in arid areas of inland Australia, including W.A., N.T., northern S.A., western N.S.W. and Qld.  
  Elix (1994z)  

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

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