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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 segregata Elix & J.Johnst.
  Mycotaxon 33: 360 (1988). T: Calder Highway, Vic., 10 Dec. 1984, J.Johnston 1502; holo: CANB.  
  Thallus small-foliose, lobate in thallus centre, loosely adnate, to 4–6 cm wide. Lobes moderately imbricate, subirregular to sublinear, irregularly branched, (0.3–) 0.5–1 mm wide. Upper surface yellow-green, flat, shiny at lobe apices, emaculate, smooth, without soredia; lobe margins smooth, black; isidia in thallus centre, simple, globose, then cylindrical or expanding laterally, rarely branching; isidia apices syncorticate and not erumpent. Medulla white. Lower surface flat, shiny, brown to pale brown, darker black-brown at lobe apices; rhizines sparse, simple, short (0.1–0.2 mm), concolorous. Apothecia sessile, to 3 mm wide; disc concave becoming ±flat, pale brown to dark brown; thalline exciple thick, involute, becoming thinner and crenate, isidiate. Ascospores 7–9 × 4–5.5 µm. Pycnidia not seen. CHEMISTRY: cortex K-, UV-; medulla K+ yellow then dark red, C-, P+ yellow; containing usnic acid, norstictic acid (major), salazinic acid (major), consalazinic acid (minor) and connorstictic acid (minor).
  Rare, endemic, on rock in hinterland areas of W.A., N.S.W., Vic. and Tas.  
  Elix (1994z)  

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

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