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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 ochroxantha (Nyl.) Zahlbr.

Cat. Lich. Univ. 10: 377 (1939)

Lecidea ochroxantha Nyl., Ann. Sci. Nat., Bot., sér. 4, 11: 223 (1859).

T: Camplolicans, Bolivia, 1847, Weddell; lecto: H-NYL 20489, fide T.D.V.Swinscow & H.Krog, Lichenologist 13: 243 (1981).

  Thallus squamulose, effuse. Prothallus indistinct to well developed in part, white to red-brown. Squamules 0.3–1.0 mm wide, adnate to ascending, isodiametric to elongate, scattered when young, later often contiguous or imbricate, crenulate to incised, plane to weakly convex, medium green, glabrous on the upper side, usually faintly pubescent along the margins. Isidia common, laminal or marginal, globose to cylindrical, simple, rarely branched. Upper cortex of type 2, 15–25 µm thick. Apothecia rather common, to 1.5 mm wide, rounded when young, becoming irregular in outline, mostly solitary, plane to moderately convex, pale to mid-brown, with an indistinct darker glabrous to slightly pubescent margin. Ascospores simple, narrowly ellipsoidal, 6.5–12.0 × 2.5–3.5 μm. Pycnidia not seen.
CHEMISTRY: Cortex and medulla K–, C–, P+ orange; containing phyllopsorin (major), chlorophyllopsorin (minor), argopsin (trace), pannarin (trace), methyl 2,7-dichloropsoromate (trace).
  Very rare on bark in strand vegetation in north-eastern Qld; also in North, Central and South America.  
  Elix (2009h)  

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

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