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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
Pyxine cylindrica Kashiw.

Bull. Natl. Sci. Mus. Tokyo, B, 3: 66 (1977)

T: about 3 km W of Lae, Morobe District, Papua New Guinea, coconut tree plantation, H.Kashiwadani 12382; holo: TNS n.v.

  Thallus 2–5 cm wide, adnate, subdichotomously lobate. Lobes radiating, discrete to ±imbricate, plane to slightly convex, 0.3–0.6 mm wide, subrotund to truncate at the apices. Upper surface white to yellowish white or yellowish grey, sparsely pruinose at the lobe tips or epruinose; dactyls and soredia absent. Pseudocyphellae distinct, marginal and laminal, irregular or very rarely becoming reticulate. Isidia laminal, cylindrical, simple or sparingly branched, 0.3–0.8 mm tall, c. 0.1 mm wide. Medulla white. Lower surface black in the centre, paler towards the margin; rhizines ±dense, furcate. Apothecia and pycnidia not seen.
CHEMISTRY: Cortex K+ yellow, C–, KC–, P+ yellow, UV–; medulla K+ yellow → red, C–, P+ orange; containing atranorin (minor), chloroatranorin (minor), norstictic acid (major), testacein (minor), unknown terpenes (minor).
  Very rare on bark in hinterland forest in eastern Qld. Also in South and East Asia and Papua New Guinea.  
  Elix (2009l)  

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

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