Xanthoparmelia fracticollis Elix

Lichenologist 36, 5: 279 (2004).

 

 

"Australia, New South Wales, Barrier Highway, 15 km by road W of Broken Hill, 32°00'26"S, 141°16'57"E, 350 m, on low gneiss outcrops in open area with sparse Acacia, Atriplex, and Ptilotus, 15 May 2003, J. A. Elix 30796 (CANB-holotypus)".

Type: Australia, New South Wales, Barrier Highway, 15 km by road W of Broken Hill, on low gneiss outcrops in open area with sparse Acacia, Atriplex, and Ptilotus, 350 m, 15 May 2003, J. A. Elix 30796 (CANB - holotype).

Barcoding: Data lacking.

Coordinates: 32°00'26"S, 141°16'57"E.

Thallus: foliose, adnate to tightly adnate, 4-6 cm wide. Lobes imbricate or contiguous, flat to markedly convex, subirregular to sublinear, subirregularly to irregularly branched, 1 - 3 mm wide, marginal and older lobes distinctly revolute and more or less subascending, lobes rarely becoming laciniate, with laciniae sublinear-elongate, sub-dichotomously branched, 0.5 - 1.0 mm wide, apices subrotund or incised. Upper surface yellow-green, darkening with age, shiny at the lobe apices, emaculate, becoming rugose, cracked and areolate with age, lacking lobulae, soredia and isidia. Medulla white. Lower surface pale brown to brown, rhizines sparse, grouped subapically, simple, brown, very short, c. 0.1 mm long. Apothecia common, sessile, 1-5 mm wide, disc concave at first, becoming flattened and undulate-distorted, dark brown, shiny, thallus exciple involute at first, smooth. Ascospores ellipsoid, 9 - 10 / 6 - 7 µm. Pycnidia common, immersed. Conidia bifusiform, 6 - 8 / 1 µm (Elix 2004: 279).

Photobiont: Trebouxia.

Chemistry: Cortex K-, medulla K+ yellow then red, C-, P+ orange-red, containing usnic acid (minor), norstictic acid (major), connorstictic acid (minor) and salazinic acid (trace) (Elix 2004: 279).