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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 parvoincerta Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 304 (1986). T: Angwin Peak, Porongurup Range, W.A., 23 Oct. 1982, J.A.Elix 10648 & L.H.Elix; holo: CANB.  
  Thallus small-foliose to subcrustose, tightly adnate, to 2–4 cm wide. Lobes imbricate or not, radiating at periphery or rarely contiguous, flat, sublinear-elongate, dichotomously to subirregularly branched, 0.5–1 (–1.5) mm wide; central lobes eventually eroding. Upper surface yellow-green, darkening with age, shiny becoming dull, emaculate, lacking soredia and isidia; older lobes transversely fractured and areolae commonly formed; lobe margins distinctly blackened. Medulla white. Lower surface black; rhizines sparse to moderately dense, simple, robust, black. Apothecia rare, subpedicellate, c. 1 mm wide; disc concave, shiny, dark brown; thalline exciple entire, thick, smooth. Ascospores 7–8 × 5–5.5 µm. Pycnidia rare. Conidia bifusiform, 5–6 × 0.5 µm. CHEMISTRY: cortex K-, UV-; medulla K+ yellow then dark red, C-, P+ intense yellow; containing usnic acid, salazinic acid, consalazinic acid, ±atranorin, ±protoconstipatic acid and ±constipatic acid.
  A scattered and rather rare (or at least seldom collected) endemic species on exposed rock in coastal, hinterland and inland areas of south-western and central Australia (W.A., N.T. and S.A.).  
  Elix (1994z)  

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

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