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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 australiensis Kalb

Herzogia 10: 61 (1994)

T: near Minyama, Sunshine Coast, c. 100 km N of Brisbane, Qld, 26°41’S, 153°08’E, on trees along the shore, K. & A.Kalb s.n.; holo: CANB; iso: Herb. Kalb n.v.

  Thallus 5–10 cm wide, adnate to tightly adnate, subdichotomously lobate. Lobes radiating, discrete to ±contiguous, plane to convex, but often slightly concave towards the tips, 0.5–0.8 mm wide, subrotund at the apices. Upper surface white to greenish grey or yellow-grey, sparsely pruinose at the lobe tips or epruinose; dactyls, isidia and soredia absent. Pseudocyphellae distinct, marginal and laminal, subreticulate. Medulla pale yellow. Lower surface black in the centre, paler towards the margin; rhizines ±dense, furcate. Apothecia common, cocoes-type, 0.5–1.5 mm wide; disc epruinose. Internal stipe distinct, white, K–, P–. Ascospores 16–22 × 6–8 μm. Pycnidia not seen.
CHEMISTRY: Cortex K–, UV+ yellow; medulla K– or K+ pale red, C–, KC–, P– or P+ orange; containing lichexanthone (major), triterpenes (major or minor), unknown pigment (minor or trace).
  Common on bark and wood, on rarely rocks, in coastal, hinterland and monsoon forests in W.A., N.T., Qld and N.S.W. Also in South America.  
  Elix (2009l)  

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