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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
Phyllopsora swinscowii Timdal & Krog

Mycotaxon 77: 88 (2001)

T: along the path from Plaine Champagne towards Piton de la Petite Rivière Noire, Black R., Mauritius, 20°25’S, 57°25’E, 1991, H.Krog & E.Timdal MAU9/50; holo: O.

  Thallus squamulose, effuse. Prothallus well developed, red-brown. Squamules 0.3–0.8 mm wide, adnate to ascending, isodiametric to somewhat elongate, scattered when young, later sometimes contiguous or imbricate, crenulate to incised, plane to weakly convex, green, glabrous on the upper side, usually faintly pubescent along the margins. Isidia common, marginal on the squamules, thin to moderately thick, often long, simple to sparingly branched. Upper cortex of type 1–2, 20–40 μm thick. Apothecia common, 0.5–1.5 mm wide, rounded when young, later irregular in outline, mostly solitary, plane to strongly convex, mid-brown to dark brown, with an indistinct concolorous pubescent or glabrous margin. Proper exciple colourless to pale brown. Epihymenium and hypothecium colourless. Ascospores simple, narrowly ellipsoidal, 6.0–9.5 × 2.0–2.5 μm. Pycnidia not seen.
CHEMISTRY: Medulla K–, C–, P+ orange; containing methyl 2,7-dichloropsoromate (major), methyl 2,7-dichloronorpsoromate (major).
  Occurs on bark in montane rainforest and coastal forest in eastern Qld; also in South America, East Africa and Mauritius.  
  Elix (2009h)  

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

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